WO1996010326A1 - Printed wiring board, method of producing the same and electronic devices - Google Patents
Printed wiring board, method of producing the same and electronic devices Download PDFInfo
- Publication number
- WO1996010326A1 WO1996010326A1 PCT/JP1995/001941 JP9501941W WO9610326A1 WO 1996010326 A1 WO1996010326 A1 WO 1996010326A1 JP 9501941 W JP9501941 W JP 9501941W WO 9610326 A1 WO9610326 A1 WO 9610326A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wiring board
- printed wiring
- fold
- insulating substrate
- notch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/118—Printed elements for providing electric connections to or between printed circuits specially for flexible printed circuits, e.g. using folded portions
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/361—Assembling flexible printed circuits with other printed circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/4038—Through-connections; Vertical interconnect access [VIA] connections
- H05K3/4084—Through-connections; Vertical interconnect access [VIA] connections by deforming at least one of the conductive layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
- H10W70/611—Insulating or insulated package substrates; Interposers; Redistribution layers for connecting multiple chips together
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
- H10W70/62—Insulating or insulated package substrates; Interposers; Redistribution layers characterised by their interconnections
- H10W70/65—Shapes or dispositions of interconnections
- H10W70/657—Shapes or dispositions of interconnections on sidewalls or bottom surfaces of the package substrates, interposers or redistribution layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
- H10W70/67—Insulating or insulated package substrates; Interposers; Redistribution layers characterised by their insulating layers or insulating parts
- H10W70/688—Flexible insulating substrates
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0393—Flexible materials
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0388—Other aspects of conductors
- H05K2201/0394—Conductor crossing over a hole in the substrate or a gap between two separate substrate parts
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0388—Other aspects of conductors
- H05K2201/0397—Tab
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/05—Flexible printed circuits [FPCs]
- H05K2201/055—Folded back on itself
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10128—Display
- H05K2201/10136—Liquid Crystal display [LCD]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10954—Other details of electrical connections
- H05K2201/10977—Encapsulated connections
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0017—Etching of the substrate by chemical or physical means
- H05K3/0026—Etching of the substrate by chemical or physical means by laser ablation
- H05K3/0032—Etching of the substrate by chemical or physical means by laser ablation of organic insulating material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistors
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits
- H05K3/321—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits by conductive adhesives
- H05K3/323—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits by conductive adhesives by applying an anisotropic conductive adhesive layer over an array of pads
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/403—Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/4092—Integral conductive tabs, i.e. conductive parts partly detached from the substrate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/072—Connecting or disconnecting of bump connectors
- H10W72/07251—Connecting or disconnecting of bump connectors characterised by changes in properties of the bump connectors during connecting
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/20—Bump connectors, e.g. solder bumps or copper pillars; Dummy bumps; Thermal bumps
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/721—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bump connectors
- H10W90/724—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bump connectors between a chip and a stacked insulating package substrate, interposer or RDL
Definitions
- Patent application title Blind printed wiring board, method of manufacturing the same, and electronic equipment
- the present invention relates to a printed wiring board for mounting a disk element such as a resistor diode or an electronic component such as an LSI, and a method of manufacturing the same. Further, the present invention relates to electronic devices such as a liquid crystal display device and an electronic printing device using such a printed wiring board.
- a printed wiring board for use in a liquid crystal display device as described in Japanese Patent Application No. 5-222636 is disclosed.
- the wiring board is shown in Fig. 25.
- the printed wiring board 1 has a surface on the side on which the semiconductor chip is mounted of an elongated insulating substrate 2 for mounting a plurality of liquid crystal driving semiconductor chips (not shown).
- Input terminal 4, input side wiring pattern 5 and output side wiring pattern 6 are formed on 3.
- the output terminal 7 of the circuit board 1 is formed on the back surface 8 of the semiconductor chip mounting surface 2 as shown in FIG. 26, and is connected to the output side wiring pattern 6 through the through hole 9. Is governed.
- the output terminal 7 is connected to an input terminal of a liquid crystal display panel not shown using, for example, an anisotropic conductive film.
- the wiring pattern can be made more fine-pitch, but the through holes are reduced.
- the area of the substrate to be formed becomes large, and as a result, the entire circuit board becomes large and small.
- drilling becomes more difficult as the ft diameter of the through hole becomes smaller and the pitch becomes finer, resulting in damage to the drill and lowering the yield, resulting in circuit board damage.
- the problem is that the manufacturing cost is high.
- electronic devices such as a liquid crystal display device and an electronic printing / hiding device equipped with such a circuit board cannot be made smaller, lighter and thinner, and the production cost is high. There is a problem.
- the present invention can achieve a finer, lighter, and thinner thinner at the same time as achieving finer electrode and terminal patterns and wiring patterns. It is an object of the present invention to provide a low-cost printed wiring board suitable for a semiconductor device and a method for manufacturing the same.
- Another object of the present invention is to make electronic equipment such as a liquid crystal display device and an electronic printing device more compact by making it smaller, lighter, and thinner, and to reduce the manufacturing cost. Disclosure of the invention
- a substrate having a first portion and a second portion which are bent and overlapped along a fold, and an insulating substrate is provided along the fold.
- a notch is formed by partially removing the material, and the surface of the insulating substrate.
- a printed wiring board in which a conductor pattern is formed above the first portion and the second portion at a notch portion so as to extend beyond the fold line.
- the conductor pattern is formed on the surface of the insulating substrate, and at the same time, the wiring pattern is formed on both surfaces of the substrate and these are formed. Can be conducted, so that wiring patterns and wiring pitches can be made finer, and a printed wiring board suitable for high-density mounting can be obtained. Further, since there is no need to provide through holes, the surface area of the substrate can be reduced, and the weight and thickness of the substrate can be reduced.
- the insulating substrate can be provided with a plurality of second portions, and these can be bent and overlap the first portions.
- the notch can be provided over the entire length of the fold, or can be provided only in an area where the conductor pattern of the fold is formed. Further, the shape of the notch portion can be formed in a plurality of small holes, slits or grooves to be continuously narrowed. The notch can be formed so as to penetrate the insulating substrate, or can be formed in a concave shape so as to partially leave the surface side where the conductor pattern is formed. Wear.
- Examples of the insulating substrate material used for the printed wiring board of the present invention include glass fiber, aramide fiber or a mixed material thereof, and epoxy resin, polyimide resin, or ⁇ ⁇ ( Bismaleide 'triazine) Composite material with resin, etc.
- Single material such as epoxy resin, polyimide resin, copper resin or polyester resin, or a mixture thereof
- a single material such as a compound material, an epoxy resin, a polyimide resin, a vinyl resin or a polyester resin, or a mixture or a compound of these materials is convenient.
- a pair of outer plates made of a material, one or more inner plates made of an insulating material sandwiched between the outer plates, A conductor pattern formed between the inner plates, and one outer plate has a first portion joined to the inner plate in contact with the first plate, and a first portion bent along the fold line and the other outer plate A second portion superposed on the outer surface, and the one outer plate has a cutout portion in which the insulating material is partially removed along the fold line.
- a multi-year calendar formed on the surface of the one outer plate with a conductor pattern continuously narrowed over a fold at a notch between the first portion and the second portion.
- a notch is formed by partially removing the insulating substrate material along a fold line that divides the substrate into a first portion and a second portion; ⁇ ⁇ Form a conductive film on the surface of the edge substrate and pattern it to form a conductor pattern that continues beyond the fold at the notch between the first part and the second part.
- Forming a printed circuit board, comprising bending the edge substrate along the fold with the conductor pattern facing outward, and overlapping the first portion and the second portion with each other. is provided.
- a conductive film is formed and patterned on the surface of an insulating substrate that is divided into a first portion and a second portion along a fold, so that the first portion and the second portion are separated from each other. Between the folds to form a conductor pattern that extends beyond the fold, and at least along the fold, partially remove the insulating substrate in the area where the conductor pattern is provided and cut. Forming a notch, bending the insulating substrate along the fold with the conductor pattern facing outward, and overlapping the first portion and the second portion with each other. And a method for manufacturing a wiring board. In this case, the notch is conveniently formed by irradiating an excimer laser to physically and chemically remove the insulating substrate.
- a conductive film is formed on a surface of an insulating substrate divided into a first portion and a second portion along a fold, and the insulating substrate is formed along the fold. Is partially removed to form a notch, the conductive film is patterned, and a knot between the first and second portions is kneaded at the notch over the fold. Forming a part, bending the insulating substrate along the fold with the conductor pattern outside, and overlapping the first part and the second part with each other. (G) A method for manufacturing a distribution board is provided. Superimposed on each other In addition, the first portion and the second portion of the edge substrate can be integrally joined by an adhesive or heat adhesion.
- an electronic apparatus including a circuit board on which an electronic component is mounted on the above-described printed wiring board.
- such electronic devices are small, light, and thin by using a printed wiring board that is small, ⁇ -amount, and thin as described above.
- Compacting can be achieved.
- a liquid crystal driving semiconductor chip on the printed wiring board of the present invention and connecting it to a liquid crystal panel, a small, light, and thin liquid crystal display is obtained.
- Equipment can be obtained. Therefore, especially in portable electronic equipment that requires compactness, the entire concealment is made smaller, lighter and thinner, and at the same time, the display screen is made larger than before to make it easier to see and display.
- FIGS. 1A to 1C are perspective views showing a method for manufacturing a printed wiring board according to the present invention in the order of steps, and FIGS. 2A to 2C are cross-sectional views thereof. You. FIGS. 3 ( ⁇ ) to 3 (D) are plan views showing cutouts of different shapes formed on the peripheral substrate.
- FIG. 4 is a sectional view showing a modification of the printed wiring board according to the present invention.
- C FIG. 5 is a sectional view showing a state where the printed wiring board of FIG. 4 is mounted. is there.
- FIG. 6 is a sectional view showing another modified example of the printed wiring according to the present invention.
- FIGS. 7 ( ⁇ ) and ( ⁇ ) are cross-sections 0 showing still another modified example of the printed wire plate according to the present invention.
- 8 (A) and 8 (B) are cross-sectional views showing still another modified example of the printed wiring board according to the present invention.
- FIG. 9 is a cross-sectional view showing another embodiment of the notch formed in the printed wiring board according to the present invention.
- 10 (A) and 10 (B) are cross-sectional views showing a multi-calendar structure printed wiring board according to the present invention.
- FIGS. 11 (A) to 11 (C) are perspective views showing a second embodiment of the method of manufacturing a printed wiring board according to the present invention in the order of steps, and FIGS. 12 (A) to 12 (C). Are cross-sectional views of them.
- FIG. 13 is a perspective view showing a first embodiment of a liquid crystal display allocation to which the present invention is applied
- FIG. 14 is an enlarged sectional view of a main part thereof.
- FIG. 15 is a perspective view showing a second embodiment of the liquid crystal display device
- FIG. 16 is an enlarged sectional view of a main part thereof.
- FIG. 17 is a perspective view showing a portable information device to which the present invention is applied.
- FIG. 18 is a perspective view showing an electronic apparatus including an input / output device to which the present invention is applied, and
- FIG. 19 is a schematic sectional view thereof.
- FIG. 20 is a perspective view showing a thermal printer head to which the present invention is applied
- FIG. 21 is an enlarged sectional view of a main part thereof.
- FIG. 22 is a perspective view showing a second embodiment of the thermal printer head
- FIG. 23 is an enlarged sectional view of a main part thereof.
- FIG. 24 is a perspective view showing a child printing apparatus to which the present invention is applied.
- FIG. 25 is a perspective view showing a printed wiring board according to the prior art.
- FIG. 26 is a cross section 0 of the printed wiring board of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 (A) to 1 (C) and 2 (A) to 2 (C) show a method of manufacturing a printed wiring board according to the present invention in the order of steps.
- This printed wiring board is for mounting a plurality of liquid crystal driving semiconductor chips as a driving circuit board of the liquid crystal display lightning.
- the printed wiring board has a thickness of 25 m.
- Re-medium A long and narrow insulating substrate 11 made of a resin-based resin having a relatively low hardness was used.
- the insulating substrate 11 is provided with a notch 12 made up of a number of continuous slits along a fold on a preset straight line parallel to one side in the longitudinal direction. Form. The width of the slit is conveniently about 2 to 4 times the thickness of the insulating substrate 11.
- the notch 12 is physically formed by using a conventionally used mechanical means such as a mold press or a drill.
- a conductive film 13 such as an electrolytic foil having a thickness of 18 mm / m is pasted on the surface of this insulating substrate 11 (10th (A), 20th (A)).
- the insulating substrate 11 is divided into a first portion 14 and a second portion 15 by the fold provided with the cutout portion 12.
- the conductive film 13 is patterned by a conventional method such as photo-etching to form desired conductor patterns 16 and 17.
- a Ni-Au plating is applied to the surface of the conductor pattern so as not to cause a problem such as migration.
- the input side wiring pattern 16 of the semiconductor chip is placed on the surface of the first portion 14 and the output side as well.
- a wiring pattern 17 is formed between the first portion 14 and the second portion 15 at the notch portion 12 so as to extend beyond the fold line.
- the edge substrate 11 is bent along the above-mentioned fold with the output-side wiring pattern 17 facing outward, and the second portion 15 is attached to the back surface 18 of the first portion 14. Overlap.
- the first portion 14 and the second portion 15 superimposed on each other are a single resin such as an epoxy resin, a urethane resin, a polyester resin, an acrylic resin, or a mixture thereof. They are joined together by thermocompression bonding using an appropriate adhesive made of a compound or a compound.
- the part 19 of the output-side wiring pattern 17 formed in the second part 15 is kneaded as an output terminal with the input terminal of the liquid crystal panel.
- a printed wiring board 20 according to the present invention having a wiring pattern on both surfaces is completed.
- the bent portion 21 of the wire pattern 17 has a notch 12 so as to have a curved shape as shown in FIG. 2 (C). It is not easy to cut even after completion of RS and printed wiring board 10 that bends.
- the thickness of the insulating substrate 11 is not limited to 25 ⁇ m, but is preferably in the range of about 10 wm to 0.2 mm.
- the board material may be a single or composite material such as an epoxy resin, a polyimide resin, or BT (visma-ray-triazine) resin. Can be used, and can be made of composite materials such as glass termite, aramide fiber, or a mixture of them, and epoxy resin, polyimide resin, or ⁇ resin. Can be used.
- the thickness of the electrolytic foil used for the conductive film 13 is 5 // ⁇ ! It is convenient if it is in the range of about 50 im.
- an alloy copper foil such as a rolled foil, a green foil, an aluminum foil, a gold foil, or a vapor-deposited sputter was used. It is possible to use a single metal such as gold 'aluminum ⁇ « ⁇ tin' zinc nickel ⁇ chromium or a metal film obtained by combining these.
- the surfaces of the conductor patterns 16 and 17 include tin, solder, zinc, aluminum, chromium, nickel, gold, and silver. , Copper or the like can be used alone or in combination of these to metallize.
- such metal plating on the surface of the conductor pattern is performed after bending the second portion 15 as shown in FIGS. 1 (C) and 2 (C). You can do that too.
- the thickness of the metal attachment is preferably in the range of about 0.1 to 5 m. Further, even if the surface of the conductor pattern is not subjected to the above-described plating treatment, it does not affect the present invention at all.
- the notch 12 is formed by a continuous slit 22 as shown in FIG. 3A, but in another embodiment, the notch 12 is shown in FIG. As shown in the figure, it can be formed by small holes 23 which are continuously narrowed.
- the groove 24 is formed only in the area where the continuous conductor pattern is provided between the first portion and the second portion. This is also, since the insulating substrate is thin even in a portion where there is no conductor pattern, it can be easily bent.
- a groove 25 can be formed over the entire length of the fold.
- the shape of the notch 2 is not limited to the shapes shown in FIGS. 3 (A) to 3 (D), and it goes without saying that the shape can be various.
- the wiring patterns are formed on both sides of the printed wiring board using the conventional technology without using any special method, tool, device, equipment, or the like. And at the same time they can be conducted to each other. Since these wiring patterns are directly connected and there is no need to provide through holes, finer wiring and wiring pitch can be realized. Since the area required for the through hole is omitted and the wiring pattern on the output side is folded, the board area can be further reduced, and the weight and thickness can be reduced. Can be done.
- the printed wiring ⁇ 26 of the modified example shown in FIG. 4 has a second portion 27 provided on the input side of the insulating substrate 11, and a cutout portion like the second portion 15 on the output side.
- the wiring pattern 16 is bent along the fold provided with the ridge, and is joined to the back surface 18 of the first portion 14.
- the wiring pattern on the input side is connected to one side of the printed wiring board.
- the wiring pattern on the input side can be made finer, and the printed wiring board can be further reduced in size.
- the printed wiring board 26 in FIG. 4 can be mounted on the main body-side substrate 29 of the electric device as shown in FIG.
- the input terminal 28 and the output terminal 19 are connected to the wirings 32 and 33 on the main body-side substrate 29 using the anisotropic conductive films 30 and 31, respectively.
- the width of the notch 12 is made considerably large, so that the second portion 15 is positioned at a position inside the back surface 18 of the first portion. Joined. As a result, the position S of the output terminal 19 is shifted to the phase to be joined. It can be placed at the optimum position corresponding to the terminal position structure on the hand side. At this time, it is preferable to apply a mode of silicone resin, acrylic resin, urethane resin, or the like to the bent portion 21 to prevent moisture, gouge and mechanical contact. It is convenient.
- the first portion 14 and the second portion 15 of the insulating substrate 11 are divided into the same size and shape. Accordingly, by joining the first portion 14 and the second portion 15 to each other, a printed wiring board having a substantially uniform overall thickness can be obtained. For this reason, when semiconductor chips are mounted on the input side and output side wiring patterns 16 and 17 of the first part 14 in a flash-down manner, fluctuations in the thickness of the insulating substrate may occur. A uniform aperture can be obtained without being affected by this, and the reliability can be further improved. Further, the entire printed wiring board is not easily affected by the shadow S due to thermal deformation and the like, and a stable board shape can be maintained. Furthermore, in manufacturing the printed wiring board, the first portion and the second portion can be easily aligned with each other, and the accuracy can be stably improved, so that the yield can be improved and the manufacturing cost can be improved. It is possible to reduce the number of birds.
- the B-stage state of a single material or a composite material such as an epoxy resin, a polyimide resin, or a BT resin (completely).
- a material made of a composite material with a resin or other B-stage material can be used.
- the bent first portion 14 and second portion 15 can be joined together by heat fusion without using an adhesive. Accordingly, the printed wiring board 1 can be made thinner, and a printed wiring board having high heat resistance and dimensional stability that is not easily deformed by heat can be obtained.
- the notch 24 is formed in a concave shape so as to leave some thickness of the insulating substrate 11 on the wiring pattern 17 side. It has been done.
- the insulation made of a 18-m-thick polyimide resin is used.
- a notch 24 was formed so as to use an edge substrate and leave the substrate material at a thickness of about 9 m.
- Such a notch is formed by removing the insulating material physicochemically (ablation) by chemical etching or excimer laser irradiation. Can be done.
- the insulating substrate physicochemically (ablation)
- a 0.5 tfm thick conductive film 13 is formed on the surface of 11 by solution evaporation, and this is patterned by etching or the like. Due to film thickness
- Wiring patterns 16 and 17 of about 5 i * m were formed.
- the substrate material remaining in the bent portion 21 is thin, it can be easily bent and the wiring pattern can be formed. Since 17 is reinforced by the remaining insulating material, a printed wiring board having high reliability can be obtained without causing problems such as cutting. Therefore, the thickness of the conductive film 13 can be made smaller. Also, the wiring pattern can be made finer and finer bitted.
- a solution was deposited as the conductive film 13 and the resulting film was subjected to a vacuum treatment to form a film having a thickness of 5 m. Can be used without problems.
- the metal film described in connection with the above-described embodiment can be used as a conductive film in the same manner.
- the notch portion 24 is formed in an inclined cross-sectional shape so that the board material is partially left only at the end on the wiring pattern 17 side. You can do that too.
- FIG. 10 shows an embodiment of a multi- ⁇ printed wiring board to which the present invention is applied.
- the multilayer printed wiring board 35 is provided with a pair of outer-layer boards 36 and 37, two inner-layer boards 38, and between them. And a three-layer conductor pattern 39.
- the upper outer layer plate 36 has the same dimensions and shape as the other outer layer plate 37 and the inner layer plate 38 and is joined to the inner layer plate 38 immediately below the first portion 40, And a second portion 42 divided by a cutout portion 41 formed wide along the fold line.
- a conductor pattern 43 is formed on the surface of the outer layer plate 26 so as to extend beyond the notch 41 between the first portion 40 and the second portion 42.
- FIGS. 11 (A) to (C) and FIGS. 12 (A) to (C) show a second embodiment of the method of manufacturing a printed wiring board according to the present invention in the order of steps. ing.
- an electrolytic network having a thickness of 18 // in was formed on the surface of an insulating substrate 11 made of a polyimide resin having a thickness of 25 m as in the first embodiment.
- a quasi-image of a conductive film made of foil or the like is attached and patterned by conventional means such as photo-etching to obtain desired wiring patterns 16 and 17 (Fig. 11 (A), Fig. 12 (A)).
- a notch 12 consisting of a number of slits is formed (FIG. 11 (8), FIG. 12 (B)).
- the shape of the notch can be of various shapes as shown in FIG. 3 described in relation to the first embodiment.
- a concave notch is provided so as to leave some thickness of the insulating material on the wiring pattern side. You can do that too.
- the insulating substrate 11 is bent with the wiring pattern 17 facing outward, and the second portion 15 is joined to the upper surface 18 of the first portion 14.
- the first portion 14 and the second portion 15 can be integrated by thermocompression bonding using an adhesive as in the case of the first embodiment.
- a board material made of B-stage resin such as polyimide resin
- the use of the excimer laser allows the notch 12 to be formed more finely and with a higher sugar content.
- a jig tool such as a die for breath machining and a drill as in the first embodiment is not required, the operation is simplified, and the production cost is further reduced. Can be done.
- a notch is formed by irradiating an excimer laser from the back side of an insulating substrate to which a conductive film is attached, and the like.
- the conductive film may be patterned to form a wiring pattern between the first portion and the second portion, which extends beyond the cutout portion.
- the printed wiring board of the present invention described above can be used by applying it to various electronic devices as exemplified below, but the present invention is not limited to such electronic devices. Absent.
- FIG. 13 and FIG. 14 show a liquid crystal display device 44 to which the present invention is applied.
- the liquid crystal display device 44 is arranged along the upper, lower and left sides of a liquid crystal panel 45 (having a display capacity of 640 X 480 dots) having a normal XY matrix structure.
- a liquid crystal panel 45 having a display capacity of 640 X 480 dots
- one long strip-shaped circuit board 46 to 48 is connected.
- the connection between the circuit board 46 and the circuit board 47 is narrowed by the relay board 39, and the circuit board 47 and the circuit board 48 are connected to each other by a relay board 50 with integrated cables for external connection. Is connected.
- each of the circuit boards has a first portion having the same size and shape as the printed wiring board of the embodiment shown in FIG. 7 (B).
- the semiconductor chip 51 for driving a liquid crystal is mounted on a printed wiring board of the present invention in which the thickness of the insulating substrate is made substantially uniform by joining the and the second portion.
- the semiconductor chips 51 are connected using a generally used anisotropic conductive film.
- an anisotropic conductive material composed of conductive particles obtained by applying Ni—Au plating to polystyrene particles having a particle size of 5 xim, and an adhesive containing an epoxy-based adhesive as a main component is used.
- thermocompression bonding was performed at a temperature of 180 ° C, a pressure of 10 gf / bump, and a pressing time of 30 seconds.
- the semiconductor chip 14 is connected to a flip chip that is directly face-bonded to a solder bump or the like.
- a variety of conventionally known methods can be used, such as a method and a method of directly connecting a bump of a semiconductor chip.
- the output side of the liquid crystal drive semiconductor chip 51 is connected to the output terminal 19 on the mating side via a bent portion 11 by a wiring pattern 17.
- the output terminal 19 is electrically and mechanically connected to the LCD terminal 52 formed around the liquid crystal panel 45 by using an anisotropic conductive film 53.
- anisotropic conductive film 53 conductive particles obtained by applying Ni—Au plating to polystyrene particles having a particle size of lOtfm, and an epoxy-based adhesive are used as main components. The connection was performed under the crimping conditions of a temperature of 170 ° C, a pressure of 3 MPa, and a pressing time of 20 seconds.
- the adhesive is used in place of the anisotropic conductive film, and the output terminal 19 of the circuit board 46 and the LCD terminal 52 can be directly connected to conduct electricity.
- this connection method the short circuit of the short circuit due to the conductive particles generated when the anisotropic conductive film is used is eliminated, and the connection of finer pitch can be achieved.
- the connection between each of the circuit boards and the relay boards 49 and 50 is made using an anisotropic conductive film. In this embodiment, the particle size
- the silicon substrate is used to connect to the circuit boards 46 to 48, the liquid crystal driving semiconductor chip 51 and the liquid crystal panel 45, and to the connection parts to the relay boards 49 and 50, respectively.
- a mold 54 such as resin, acryl resin, urethane resin, etc. is applied to prevent moisture, moisture and mechanical damage.
- the circuit boards 46 to 38 can be accommodated within the range of the thickness of the liquid crystal panel 45, and the surface ridge of the circuit board protruding from the liquid crystal panel 45 in the plane direction is reduced. Therefore, the so-called frame portion can be reduced, and the liquid crystal display device can be made compact by reducing the size, the amount of ⁇ , and the thickness thereof. Also, since the manufacturing cost of the circuit board can be reduced, and the number of connection points with the liquid crystal panel and the contact area of the circuit board can be reduced, the mounting cost can be reduced. And the production cost of liquid product display lightning can be reduced.
- FIG. 15 and FIG. 16 show modifications of the above-described liquid crystal display device.
- the peripheral portion 55 of the liquid crystal panel 45 is enlarged so as to include the entire circuit boards 46 to 48 in a planar manner, and each of the circuit boards and the relay board 49,
- the wire bonding between 50 and 50 is not anisotropic conductive film but wire 56 made of metal such as Au, Al, or Cu or an alloy thereof.
- wire 56 made of metal such as Au, Al, or Cu or an alloy thereof.
- the above-mentioned liquid crystal display device of the present invention can be mounted on a portable information device 57 as shown in FIG. 17 and used as a display means 58 thereof.
- This portable information device inputs data using a key 59 and bi-directionally transmits information both indoors and outdoors, and even inside a running train or car, using a communication antenna 60. It has a function that can be exchanged.
- the liquid crystal display device of the present invention is configured to be small, light, and thin, and the frame portion is small, so that the display screen can be made large and easy to see.
- the portable information equipment 57 equipped with this is compact, lightweight, and thin, and is configured as a compact, easy to carry and handle, and operable to the extent that it can be easily operated with one hand. It is possible to improve the function and improve the performance by increasing the amount of displayed information.
- FIGS. 18 and 19 show an electronic apparatus 61 in which the above-described liquid crystal display device of the present invention is provided with an input / output device in which a touch panel is integrated as an input device. .
- This electronic device is used, for example, as a terminal device of an information network or a portable computer.
- Touch panel 62 is mounted on 4 4.
- the input characters 65, symbols, figures, etc. are harmed using the input pen 64 on the input / output screen 63, they are displayed as the display characters 66, etc. Displayed on the screen.
- the liquid crystal display device is configured to be small, light, and thin, and the frame portion is small, the display screen is large and easy to see. It is compact because of its small size, ⁇ amount, and thinness, and it is possible to improve operability and increase the amount of display information to achieve high functionality and high performance.
- FIGS. 20 and 21 show a thermal printer head 67 for use in an electronic printing apparatus to which the present invention is applied.
- the thermal printer head 67 is formed on a ceramic substrate 69 on which a heating section 68 is formed by a driving semiconductor chip by a known technique such as an anisotropic conductive film.
- the circuit board 71 on which 70 is mounted is connected.
- the circuit board 71 is the same as the circuit board of the first embodiment of the liquid crystal display device described above, and the terminal 72 formed on the board 69 of the thermal printer head 67 is the same as the circuit board of the first embodiment. They are electrically and mechanically connected by thermocompression bonding using an isotropic conductive film 73.
- the circuit board 71 can be similarly connected by various other known means.
- the circuit board 71 is electrically kneaded at one end with an external device or an electronic device body by a cable 74 connected using, for example, an anisotropic conductive film. You.
- a circuit portion necessary for driving the thermal printer head 67 can be reduced, and therefore, the thermal bridge can be reduced.
- Compact and lightweight head ⁇ Can be made thinner.
- the manufacturing cost of the circuit board is reduced, and the number of connection points with the thermal printer head and the number of connection points between the circuit boards can be reduced, so that the mounting cost can be reduced.
- the manufacturing cost of the thermal printer head and the electronic equipment on which it is mounted can be reduced.
- Figures 22 and 23 show the deformation of the thermal printer head described above. Examples are given.
- This modified embodiment is different from the first embodiment in that the substrate 69 of the thermal printer head 67 is enlarged to include the entire circuit board 71 in plan view. Different from head.
- the thermal printer head is provided.
- the strength against vibration and impact of 67 is improved, and higher reliability is obtained. For this reason, it is particularly suitable for use in portable electronic devices.
- FIG. 7 A portable electronic printing device 75 equipped with the above-described thermal printer head of the present invention is shown in FIG. This portable electronic printing device is so small that it can be operated with one hand, and the printing part provided at the tip
- the compact, lightweight, and thin, compact, low-cost thermal printer head described above is used to reduce the size of the main unit. Compactness and cost reduction can be achieved by reducing the weight and thickness.
- an electronic printing haze that is strong against impact vibration can be obtained.
- the above-described liquid crystal display device g of the present invention for the display screen 68 a smaller size, lighter weight, thinner, and lower cost heater printing is realized. Equipment can be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Structure Of Printed Boards (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95932236A EP0779772B1 (en) | 1994-09-27 | 1995-09-26 | Printed wiring board, method of producing the same and electronic devices |
| DE69530990T DE69530990T2 (de) | 1994-09-27 | 1995-09-26 | Leiterplatte, verfahren zu deren herstellung und elektronische vorrichtungen |
| US08/809,801 US6121988A (en) | 1994-09-27 | 1995-09-26 | Printed wiring board and its manufacturing method, and electronic apparatus |
| KR1019970702006A KR100327686B1 (ko) | 1994-09-27 | 1995-09-26 | 다층프린트배선반,액정표시장치,및전자인쇄장치 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23162894 | 1994-09-27 | ||
| JP6/231628 | 1994-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996010326A1 true WO1996010326A1 (en) | 1996-04-04 |
Family
ID=16926493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1995/001941 Ceased WO1996010326A1 (en) | 1994-09-27 | 1995-09-26 | Printed wiring board, method of producing the same and electronic devices |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6121988A (ja) |
| EP (1) | EP0779772B1 (ja) |
| KR (1) | KR100327686B1 (ja) |
| CN (1) | CN1154403C (ja) |
| DE (1) | DE69530990T2 (ja) |
| TW (1) | TW337397U (ja) |
| WO (1) | WO1996010326A1 (ja) |
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| FR2754416A1 (fr) * | 1996-10-04 | 1998-04-10 | Thomson Csf | Module electronique et son procede de fabrication |
| JP2002057416A (ja) * | 2000-08-10 | 2002-02-22 | Sony Chem Corp | 両面接続用フレキシブル配線板 |
| KR100404563B1 (ko) * | 1999-06-09 | 2003-11-05 | 마쯔시다덴기산교 가부시키가이샤 | 전자부품, 이 전자부품을 실장한 전자 기기 및 그 제조방법 |
| JP2004138704A (ja) * | 2002-10-16 | 2004-05-13 | Seiko Epson Corp | 表示体構造、表示体構造の製造方法および電子機器 |
| JP2008192735A (ja) * | 2007-02-02 | 2008-08-21 | Hitachi Aic Inc | 配線板 |
| JP2010129850A (ja) * | 2008-11-28 | 2010-06-10 | Toppan Forms Co Ltd | 積層配線基板 |
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| JP2011049158A (ja) * | 2009-07-29 | 2011-03-10 | Sanyo Electric Co Ltd | バッテリモジュール、バッテリシステムおよび電動車両 |
| KR102099934B1 (ko) | 2012-11-30 | 2020-04-10 | 엘지이노텍 주식회사 | 인쇄회로기판, 상기 인쇄회로기판을 포함하는 조명장치 및 백라이트 유닛 |
| CN103247233B (zh) * | 2013-04-28 | 2015-09-23 | 京东方科技集团股份有限公司 | 柔性基板、显示装置及在柔性基板上贴附电子器件的方法 |
| TW201443516A (zh) * | 2013-05-03 | 2014-11-16 | Gio Optoelectronics Corp | 顯示面板及顯示裝置 |
| KR102055194B1 (ko) | 2013-05-06 | 2019-12-12 | 삼성전자주식회사 | 표시 장치 |
| EP2881980A1 (en) * | 2013-12-06 | 2015-06-10 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Method and apparatus for assembling a component with a flexible foil, as well as the assembled product |
| KR102258746B1 (ko) | 2014-08-13 | 2021-06-01 | 삼성전자주식회사 | 벤딩부를 갖는 칩 온 필름 패키지 |
| JP2017073411A (ja) * | 2015-10-05 | 2017-04-13 | ソニー株式会社 | 発光装置 |
| CN105957846B (zh) | 2016-06-28 | 2019-06-14 | 青岛海信宽带多媒体技术有限公司 | 光模块 |
| CN107894681A (zh) * | 2017-12-15 | 2018-04-10 | 京东方科技集团股份有限公司 | 一种阵列基板、其制作方法及显示面板 |
| TWI766275B (zh) * | 2020-05-12 | 2022-06-01 | 台灣愛司帝科技股份有限公司 | 影像顯示器及其電路承載與控制模組 |
| CN114554691B (zh) * | 2020-11-25 | 2024-08-02 | 鹏鼎控股(深圳)股份有限公司 | 超长电路板及其制备方法 |
| EP4595710A1 (en) * | 2022-09-30 | 2025-08-06 | AGP Worldwide Operations GmbH | Folded flexible circuit for automotive laminate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2754416A1 (fr) * | 1996-10-04 | 1998-04-10 | Thomson Csf | Module electronique et son procede de fabrication |
| KR100404563B1 (ko) * | 1999-06-09 | 2003-11-05 | 마쯔시다덴기산교 가부시키가이샤 | 전자부품, 이 전자부품을 실장한 전자 기기 및 그 제조방법 |
| JP2002057416A (ja) * | 2000-08-10 | 2002-02-22 | Sony Chem Corp | 両面接続用フレキシブル配線板 |
| JP2004138704A (ja) * | 2002-10-16 | 2004-05-13 | Seiko Epson Corp | 表示体構造、表示体構造の製造方法および電子機器 |
| JP2008192735A (ja) * | 2007-02-02 | 2008-08-21 | Hitachi Aic Inc | 配線板 |
| JP2010129850A (ja) * | 2008-11-28 | 2010-06-10 | Toppan Forms Co Ltd | 積層配線基板 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970706714A (ko) | 1997-11-03 |
| EP0779772B1 (en) | 2003-06-04 |
| DE69530990T2 (de) | 2004-05-19 |
| EP0779772A1 (en) | 1997-06-18 |
| EP0779772A4 (en) | 1998-07-29 |
| DE69530990D1 (de) | 2003-07-10 |
| CN1158689A (zh) | 1997-09-03 |
| TW337397U (en) | 1998-07-21 |
| CN1154403C (zh) | 2004-06-16 |
| KR100327686B1 (ko) | 2002-08-24 |
| US6121988A (en) | 2000-09-19 |
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