WO2022193306A1 - 电路板模组 - Google Patents
电路板模组 Download PDFInfo
- Publication number
- WO2022193306A1 WO2022193306A1 PCT/CN2021/081862 CN2021081862W WO2022193306A1 WO 2022193306 A1 WO2022193306 A1 WO 2022193306A1 CN 2021081862 W CN2021081862 W CN 2021081862W WO 2022193306 A1 WO2022193306 A1 WO 2022193306A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit board
- metal pattern
- electrically connected
- layer
- ground
- 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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- 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
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
-
- 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
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0254—High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection ; Arrangements for regulating voltages or for using plural voltages
- H05K1/0257—Overvoltage protection
- H05K1/0259—Electrostatic discharge [ESD] protection
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
- H05K1/14—Structural association of two or more printed circuits
- H05K1/144—Stacked arrangements of planar printed circuit boards
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
-
- 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
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0215—Grounding of printed circuits by connection to external grounding means
-
- 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
- H05K2201/04—Assemblies of printed circuits
- H05K2201/041—Stacked PCBs, i.e. having neither an empty space nor mounted components in between
-
- 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
-
- 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
- H05K2201/10621—Components characterised by their electrical contacts
- H05K2201/10674—Flip chip
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/16—Inspection; Monitoring; Aligning
- H05K2203/162—Testing a finished product, e.g. heat cycle testing of solder joints
Definitions
- the present disclosure relates to the field of touch technology, and in particular, to a circuit board module.
- Electrostatic discharge refers to the transfer of charges caused by objects with different electrostatic potentials approaching or in direct contact with each other.
- ESD is a near-field hazard source with a very high degree of hazard, which can form high voltage, strong electric field, instantaneous large current, and strong electromagnetic radiation. If the display module or the circuit board of the touch display device has weak ESD resistance, the display or touch function is often abnormal in practical applications, and even the touch display device is damaged.
- a circuit board module includes a touch control chip, a first circuit board, a second circuit board and at least one conductive connection part;
- the touch control chip includes a ground pin and a plurality of signal pins;
- the first circuit board is electrically connected to the touch display screen;
- the first circuit board includes a first ground portion and a plurality of signal pads;
- the signal pads are electrically connected to the signal pins, so that the touch chip passes through the
- the first circuit board is electrically connected to the touch display screen;
- the first ground portion is electrically connected to the ground pin;
- the second circuit board includes a second ground portion; the at least one conductive connection portion, It is electrically connected to the first ground portion and the second ground portion.
- the conductive connection portion includes: a metal support layer, located on a side of the second surface away from the touch-control chip, for supporting the touch-control chip; a first conductive adhesive, located on the touch-control chip Between the metal support layer and the first circuit board, it is used to bond the metal support layer and the first circuit board and connect them electrically; a second conductive adhesive is located between the metal support layer and the first circuit board. Two circuit boards, used for bonding and electrically connecting the metal support layer and the second circuit board.
- the first ground portion includes a first via hole penetrating the first circuit board; a first end of the first via hole and the ground pin of the touch chip electrically connected, and the second end is electrically connected to the conductive connection part.
- the first circuit board includes a first metal pattern layer, a second metal pattern layer, and a first substrate between the first metal pattern layer and the second metal pattern layer;
- the The first grounding part includes: a plurality of grounding pads, one of which is electrically connected to one of the grounding pins; a plurality of first grounding leads, the first end of one of the first grounding leads is connected to one of the grounding pins.
- the ground pads are electrically connected;
- the plurality of first ground leads and the first metal pattern layer are of the same layer and the same material;
- a plurality of second via holes the first end of one of the second via holes is connected to the the second end of the first ground lead is electrically connected;
- the second via hole penetrates the first substrate;
- a metal ground pattern is electrically connected to the second end of the second via hole , and is electrically connected to the conductive connection part; the metal ground pattern and the second metal pattern layer are in the same layer and the same material.
- the circuit board module further includes a carrier board, and the first circuit board and the second circuit board are arranged side by side on the carrier board; the first circuit board includes a distance from the carrier board the first surface of the board; the signal pads are located on the first surface; the second circuit board includes a third surface away from the carrier board; the at least one conductive connection part includes a conductive cloth, the conductive cloth The conductive cloth is arranged on the side where the first surface and the third surface are located; the conductive cloth is electrically connected to the first grounding portion and the second grounding portion.
- the first circuit board includes a third metal pattern layer on a side close to the touch chip;
- the first ground portion includes: a plurality of ground pads, one of the ground pads and one of the ground pads The ground pins are electrically connected; a plurality of second ground leads, the first end of one second ground lead is electrically connected to one of the ground pads, and the second end of the second ground lead is electrically connected to the conductive Electrical connection;
- the plurality of second ground leads and the third metal pattern layer are of the same layer and the same material.
- the first ground portion further includes a first via hole penetrating the first circuit board; a first end of the first via hole and the ground lead of the touch chip
- the pins are electrically connected
- the at least one conductive connection part further includes: a metal support layer, located on the side of the first circuit board away from the touch chip, for supporting the touch chip; a first conductive adhesive, located on the side of the first circuit board away from the touch chip. Between the metal support layer and the first circuit board, the metal support layer and the second end of the first via hole are electrically connected.
- At least one of the first metal pattern layer and the second metal pattern layer includes a plurality of touch traces; the first ends of the touch traces are electrically connected to the touch chip , the second end of the touch trace is electrically connected to the touch display screen.
- the circuit board module includes: a first insulating layer located on a side of the first metal pattern layer away from the first substrate and bonded to the first metal pattern layer ; the first insulating layer is provided with a first opening, and the touch control chip is arranged in the first opening; the second insulating layer is located on the side of the second metal pattern layer away from the first substrate, and is bonded with the second metal pattern layer; the second insulating layer is provided with a second opening, and the conductive connection part is provided in the second opening.
- the circuit board module further includes: an electromagnetic shielding layer located on a side of the fourth insulating layer away from the second substrate.
- the thickness of the metal support layer ranges from 0.05 to 0.3 mm.
- the first insulating layer, the second insulating layer, the third insulating layer, and the fourth insulating layer have the same structure and material.
- FIG. 3 is a cross-sectional view of the touch display device shown in FIG. 2 along a J-J direction;
- FIG. 4 is a structural diagram of a touch display device according to other embodiments.
- FIG. 6 is another cross-sectional view of the circuit board module shown in FIG. 1 along the I-I direction;
- FIG. 7 is a cross-sectional view of a portion of a circuit board module according to some embodiments.
- Fig. 8 is another cross-sectional view along the direction I-I of the circuit board module shown in Fig. 1;
- Fig. 9 is another cross-sectional view along the direction I-I of the circuit board module shown in Fig. 1;
- FIG. 10 is another cross-sectional view of the circuit board module shown in FIG. 1 along the I-I direction;
- FIG. 12 is a cross-sectional view of the circuit board module shown in FIG. 11 along the N-N direction;
- FIG. 14 is another cross-sectional view of the circuit board module shown in FIG. 1 along the I-I direction;
- FIG. 15 is another cross-sectional view of the circuit board module shown in FIG. 1 along the I-I direction;
- FIG. 16 is another cross-sectional view of the circuit board module shown in FIG. 1 along the I-I direction;
- FIG. 18 is a cross-sectional view of the circuit board module shown in FIG. 17 along the Z-Z direction;
- FIG. 19 is a cross-sectional view of the circuit board module shown in FIG. 17 along the Z-Z direction.
- first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
- a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
- the expressions “coupled” and “connected” and their derivatives may be used.
- the term “connected” may be used in describing some embodiments to indicate that two or more components are in direct physical or electrical contact with each other.
- the term “coupled” may be used in describing some embodiments to indicate that two or more components are in direct physical or electrical contact.
- the terms “coupled” or “communicatively coupled” may also mean that two or more components are not in direct contact with each other, yet still co-operate or interact with each other.
- the embodiments disclosed herein are not necessarily limited by the content herein.
- At least one of A, B, and C has the same meaning as “at least one of A, B, or C”, and both include the following combinations of A, B, and C: A only, B only, C only, A and B , A and C, B and C, and A, B, and C.
- a and/or B includes the following two combinations: A only, B only, and A and B in combination.
- the term “if” is optionally construed to mean “when” or “at” or “in response to determining” or “in response to detecting,” depending on the context.
- the circuit board module 300 may include a first circuit board 10 and a second circuit board 30 .
- the first circuit board 10 is electrically connected to the touch display screen 200 for transmitting touch signals.
- the circuit board module 300 further includes a touch chip 20 .
- the touch chip 20 is electrically connected to the first circuit board 10 , and the touch chip 20 can receive the touch signal from the touch display screen 200 through the first circuit board 10 and process the touch signal.
- the second circuit board 30 is electrically connected to the touch display screen 200 and is also electrically connected to a display driving chip (not shown in the figure).
- the above display driving chip can transmit display signals to the touch display screen 200 through the second circuit board 30 .
- the first circuit board 10 may be a touch flexible circuit board (TFPC) for transmitting touch signals
- the second circuit board 30 may be a main flexible circuit board (main flexible circuit board) for transmitting display signals , MFPC).
- the following describes in detail how the first circuit board 10 of the circuit board module 300 transmits touch signals and how the second circuit board 30 transmits display driving signals.
- the touch chip 20 in order to electrically connect the touch chip 20 with the plurality of signal pads 112 , as shown in FIG. 3 ( FIG. 3 is a cross-sectional view along the J-J direction of FIG. 2 ), the touch chip 20 includes a plurality of signal pins twenty one. One signal pin 21 may be electrically connected to one signal pad 112 .
- the embodiments of the present disclosure do not limit the specific numbers of the touch traces 111 , the signal pads 112 , the signal pins 21 , and the display signal lines 31 .
- the embodiment of the present disclosure does not limit the position of the touch traces 111 on the first circuit board 10 , nor does it limit the position of the display signal lines 31 on the second circuit board 30 .
- the ratio of the area of the second ground portion 32 to the area of the second circuit board 30 is V, and the value range of the ratio V may be: 0.1 ⁇ V ⁇ 0.2.
- the ratio V when the ratio V is less than 0.1, the area of the second ground portion 32 is small, so that the effect of reducing the ground impedance of the touch chip 20 is poor.
- the ratio V is greater than 0.2, the wiring space of the display signal lines 31 in the second circuit board 30 will be reduced, which is not conducive to the wiring design of the display signal lines 31 .
- a grounding network is formed for the touch chip 20 , and the grounding network may include the grounding pin 22 , the first grounding portion 14 , the conductive connecting portion 40 and the second grounding portion 32.
- the circuit board module 300 of the present disclosure when using the circuit board module 300 of the present disclosure to perform an air ESD test, the circuit board module 300 can withstand an ESD impact of 16KV, or, when using the circuit board module 300 of the present disclosure to perform a contact ESD test, the circuit The board module 300 can withstand an ESD impact of 8KV, while the circuit board in the prior art can only reach 8KV using an air ESD test, and can only reach 4KV using a contact ESD test. It can be seen that the circuit board module provided by the embodiment of the present disclosure can only reach 8KV. The antistatic ability is significantly enhanced.
- the circuit board module 300 further includes a third insulating layer 60 and a fourth insulating layer 61 .
- the third insulating layer 60 is located on the side of the fourth metal pattern layer 33 away from the second substrate 35 , and is bonded to the fourth metal pattern layer 33 .
- the fourth insulating layer 61 is located on the side of the fifth metal pattern layer 34 away from the second substrate 35 and is bonded to the fifth metal pattern layer 34 .
- the first through hole K1 may be filled with a metal material.
- the embodiments of the present disclosure do not limit the specific types of the foregoing metal materials. The following is similar to the manner in which the via hole electrically connects the two devices, and will not be described in detail in the following.
- the grounding impedance of the touch chip 20 can be significantly reduced while satisfying the reasonable wiring space of the first circuit board 10 , thereby improving the antistatic capability of the touch chip 20 .
- the present disclosure does not specifically limit the shape of the metal ground pattern 131 .
- the ground network of the touch chip 20 includes a plurality of first ground leads 114 , it is equivalent to increase the discharge network channel of the touch chip 20 , and at the same time, by setting a plurality of second via holes K2 in the ground network , which is equivalent to connecting the plurality of first grounding leads 114 and the metal grounding pattern 131 in parallel, which reduces the impedance between the plurality of first grounding leads 114 and the metal grounding pattern 131 , thereby reducing the grounding impedance of the touch chip 20 , thereby The antistatic capability of the touch chip 20 is further enhanced.
- the first ground lead 114 and the first metal pattern layer 11 are of the same layer and the same material, and may be a plurality of first ground leads 114 and a plurality of touch traces 111 of the same layer and the same material, and the third A ground lead 114 is insulated from the touch trace 111 .
- the above-mentioned multiple first ground leads 114 and multiple touch traces 111 may be prepared by using the same photolithography process.
- the area of the metal ground pattern 131 is smaller than that of the second ground portion 32 .
- the circuit board module 300 can adopt the two arrangement modes of the first grounding portion 14 shown in FIG. 10 and FIG. 12 at the same time. In this case, a simplified process can be realized. And two functions of improving the antistatic ability of the touch chip 20 .
- the first grounding portion 14 is taken as an example for the description of the first through hole K1 .
- the metal support layer 41 can be a flat plate with a certain thickness and strength, so that the metal support layer 41 can also flatten the touch chip 20 on the first circuit board 10
- the support function prevents the phenomenon of virtual welding from occurring when the signal pins 21 of the touch chip 20 and the signal pads 112 are welded.
- the metal support layer 41 can also play a role of flat support for the second circuit board 30 .
- the value range of the thickness h1 of the metal support layer 41 is: 0.05mm ⁇ h1 ⁇ 0.3mm.
- the thickness h1 of the metal support layer 41 may be 0.1mm, 0.15mm, and 0.2mm.
- the thickness of the metal support layer 41 is moderate, which can ensure that the devices (such as touch chips) located on the metal support layer 41 when the parts are printed. The flatness of the device can prevent the virtual welding of the device, and at the same time, it will not cause waste of resources, and meet the thin and light design of the whole machine.
- the embodiment of the present disclosure does not specifically limit the material and shape of the metal support layer 41.
- the metal support layer 41 may be a single piece made of stainless steel. flat.
- the value range of the thickness h2 of the first conductive adhesive 42 may be: 0.02mm ⁇ h2 ⁇ 0.08mm.
- the thickness h2 of the first conductive adhesive 42 is less than 0.03 mm, since the film layer of the first conductive adhesive 42 is too thin, the bonding effect between the metal support layer 41 and the first grounding portion 14 is poor, and when the first conductive adhesive 42 When the thickness h2 is greater than 0.06mm, it will cause waste of resources, and is not conducive to the thin and light design of the whole machine.
- the thickness h2 of the first conductive adhesive 42 can be 0.04mm, 0.05mm, and 0.06mm. At this time, the thickness h2 of the first conductive adhesive 42 is moderate. When the metal support layer 41 and the first grounding portion 14 are bonded together The bonding effect is good, and it meets the light and thin design of the whole machine.
- the embodiment of the present disclosure does not specifically limit the constituent materials of the first conductive adhesive 42 , and only needs to ensure that the first conductive adhesive 42 has both adhesive and conductive properties.
- the constituent materials of the first conductive adhesive 42 and the second conductive adhesive 43 may be the same or different.
- the circuit board module 300 further includes a first insulating layer 62 and a second insulating layer 63 .
- the first insulating layer 62 is located on the side of the first metal pattern layer 11 away from the first substrate 12 , and is bonded to the first metal pattern layer 11 .
- the second insulating layer 63 is located on the side of the second metal pattern layer 13 away from the first substrate 12 and is bonded to the second metal pattern layer 13 . In this way, by disposing the first insulating layer 62 and the second insulating layer 63 in the first circuit board 10 , the first metal pattern layer 11 and the second metal pattern layer 13 can be insulated and protected.
- the first insulating layer 62 is provided with a first opening O1, and at this time, the touch chip 20 is provided in the first opening O1.
- the second insulating layer 63 is provided with a second opening O2, and at this time, the conductive connection portion 40 is provided in the second opening O2.
- first insulating layer 62 and the second insulating layer 63 are similar to those of the third insulating layer 60 , and details are not repeated here.
- composition structures and materials of the first insulating layer 62 , the second insulating layer 63 , the third insulating layer 60 and the fourth insulating layer 61 may be the same or different.
- the maximum length D1 of the metal support layer 41 is greater than the maximum length D2 of the touch chip 20 .
- the vertical projection of the touch chip 20 on the second circuit board 30 is completely within the vertical projection of the metal support layer 41 on the second circuit board 30 , and the metal support layer 41 can play a good role in the touch chip 20 at this time. of support.
- the circuit board module 300 may further include a transient voltage suppressor (TVS) diode 50 .
- the TVS tube 50 is electrically connected to the first circuit board 10 and is located in the first opening O1.
- the maximum length D1 of the metal support layer 41 is greater than the maximum length D3 of the area where the touch chip 20 and the TVS tube 50 are located.
- the vertical projection of the area where the touch chip 20 and the TVS tube 50 are located on the second circuit board 30 is completely within the vertical projection of the metal support layer 41 on the second circuit board 30 , and the metal support layer can be used for touch control.
- the area where the chip 20 and the TVS tube are located plays a good supporting role, so as to ensure that the metal supporting layer 41 plays a supporting role for the above-mentioned devices and prevents virtual welding when the parts are punched.
- the vertical projection of the regions where all the devices are located on the second circuit board 30 is smaller than that of the metal support layer 41 on the second circuit board 30 .
- Vertical projection on circuit board 30 it can be ensured that the metal support layer 41 plays a good supporting role for all the devices located on the first circuit board 10, and the flatness of the devices during soldering is ensured.
- the circuit board module 300 further includes an electromagnetic shielding layer 64 .
- the electromagnetic shielding layer 64 is located on the side of the fourth insulating layer 61 away from the second substrate 35 and is connected to the fourth insulating layer 61 . By disposing the electromagnetic shielding layer 64 in the circuit board module 300 , the electromagnetic interference of the touch display device 100 to the second circuit board 30 can be shielded.
- the circuit board module 300 may further include a carrier board 65 .
- the carrier plate 65 may include foam 651 and grid glue 652 .
- the foam 651 is located on the side of the electromagnetic shielding layer 64 away from the fourth insulating layer 61 and is connected to the electromagnetic shielding layer 64 .
- the grid glue 652 is located on the side of the foam 651 away from the electromagnetic shielding layer 64 and is connected with the foam 651 .
- Example 2 differs from Example 1 in that the first circuit board 10 and the second circuit board 30 are arranged side by side. Specifically, the first circuit board 10 and the second circuit board 30 here are electrically connected to the touch display screen 200 because the pins on different sides are electrically connected, so that the first circuit board 10 and the second circuit board 30 can be arranged side by side.
- the touch display device 100 includes a touch display screen 200 and a circuit board module 300 .
- the circuit board module 300 includes a first circuit board 10 , a touch chip 20 , a second circuit board 30 and at least one conductive connection portion 40 .
- the first circuit board 10 is electrically connected to the touch display screen 200 and is electrically connected to the touch control chip 20
- the second circuit board 30 is electrically connected to the touch display screen 200 .
- the first circuit board 10 and the second circuit board 30 are arranged side by side on the carrier board 65 .
- the first circuit board 10 includes a first surface M1 away from the carrier board 65
- the second circuit board 30 includes a third surface M3 away from the carrier board 65 .
- At least one conductive connection 40 may include conductive cloth 44 .
- the conductive cloth 44 is located on the side where the first surface M1 and the third surface M3 are located, and can electrically connect the first ground portion 14 of the first circuit board 10 and the second ground portion 32 of the second circuit board 30 .
- the explanation of the second grounding portion 32 is similar to that of the first example, and will not be repeated here.
- the second grounding portion 32 is still in the same layer as the fourth metal pattern layer 33 .
- the material is explained as an example.
- the first circuit board 10 includes a third metal pattern layer 16 , a second metal pattern layer 13 , and a first substrate 12 located between the third metal pattern layer 16 and the second metal pattern layer 13 .
- the third metal pattern layer 16 is located on the side of the first substrate 12 close to the touch chip 20 .
- the first ground portion 14 includes a ground pad 113 and a second ground lead 115 .
- the ground pad 113 is electrically connected to the ground pin 22 and is electrically connected to the first end m of the second ground lead 115, the second end n of the second ground lead 115 is electrically connected to the conductive cloth 44, and the conductive cloth 44 It is also electrically connected to the second ground portion 32 .
- the grounding network of the touch chip 20 includes the grounding pins 22 , the grounding pads 113 , the second grounding leads 115 , the conductive cloth 44 and the second grounding portion 32 which are electrically connected in sequence.
- the electrostatic discharge channel of the touch chip 20 can be significantly increased, thereby avoiding ESD
- the instantaneous high current generated during the process disconnects the internal circuit of the touch chip 20 , which causes the touch failure phenomenon.
- the plurality of second ground leads 115 may be of the same layer and material as the third metal pattern layer 16 .
- the above-mentioned second ground lead 115 and the third metal pattern layer 16 can be prepared by the same photolithography process. It should be noted that, in FIG. 18 , the explanation that the second ground lead 115 and the third metal pattern layer 16 are represented by different patterns is similar to the first example, and will not be repeated here.
- the circuit board module 300 further includes a second double-sided adhesive tape 66 .
- the setting method of the second double-sided tape 66 can be obtained in the same way as the first double-sided tape 601 , and details are not described here.
- the second double-sided tape 66 can be the same as the first double-sided tape 601 or different.
- the discussion on the carrier plate 65 here is similar to that of the first example, and will not be repeated here.
- the conductive cloth 41 may include a non-woven fabric 441 and a third conductive adhesive 442 that are arranged in layers.
- the third conductive adhesive 442 is close to the first circuit board 10 and the second circuit board 30 .
- the explanation about the third conductive adhesive 442 is similar to the explanation of the first conductive adhesive 42 in Example 1, and will not be repeated here.
- the embodiment of the present disclosure does not specifically limit the material of the non-woven fabric 441 .
- the circuit board module 300 further includes a second conductive connection portion 45 .
- the second conductive connection portion 45 includes a metal support layer 41 and a first conductive glue 42 .
- the first ground portion 14 further includes a first conductive hole K1 penetrating through the first circuit board 10 .
- the explanations about the metal support layer 41 , the first conductive adhesive 42 and the first via hole K1 are similar to those of the first example, and are not repeated here.
- the grounding network of the touch chip 20 includes two parts: one part is the ground pin 22 , the ground pad 113 , the second ground lead 115 , the third conductive glue 442 and the second ground part 32 which are electrically connected in sequence, and the other part is It is the ground pin 22 , the first via hole K1 , the first conductive glue 42 and the metal support layer 41 which are electrically connected in sequence. It is not difficult to see that, compared with the grounding network of the touch control chip 20 shown in FIG. 18 , the grounding network of the touch control chip 20 in this embodiment becomes larger due to the presence of the metal support layer 41 , which is equivalent to increasing the touch The discharge channel of the chip 20 further enhances the antistatic capability of the touch chip 20 .
- the metal support layer 41 can also support the touch chip 20 located on the first circuit board 10 and prevent the phenomenon of virtual welding when the ground pins 31 of the touch chip 20 and the ground pads 113 are welded. .
- the above-mentioned metal support layer 41 can also be replaced with a reinforced PI having a certain thickness and strength.
- the first conductive adhesive 42 can be replaced with a common double-sided adhesive tape, so that As a result, while realizing the supporting and reinforcing effect on the touch chip 20, the cost can also be saved.
- the thickness of the reinforcing PI may be the same as the thickness of the above-mentioned metal support layer 41 , which will not be repeated here.
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Abstract
Description
Claims (20)
- 一种电路板模组,其中,包括:触控芯片,包括接地引脚和多个信号引脚;第一电路板,与触控显示屏电连接;所述第一电路板包括第一接地部和多个信号焊盘;所述信号焊盘与所述信号引脚电连接,以使得所述触控芯片通过所述第一电路板与所述触控显示屏电连接;所述第一接地部与所述接地引脚电连接;第二电路板,包括第二接地部;至少一个导电连接部,与所述第一接地部以及所述第二接地部电连接。
- 根据权利要求1所述的电路板模组,其中,所述第一电路板包括相对设置的第一表面和第二表面;所述多个信号焊盘位于所述第一表面;所述第二电路板位于所述第二表面的一侧;所述导电连接部位于所述第一电路板和所述第二电路板之间。
- 根据权利要求2所述的电路板模组,其中,所述导电连接部包括:金属支撑层,位于所述第二表面远离所述触控芯片的一侧,用于支撑所述触控芯片;第一导电胶,位于所述金属支撑层和所述第一电路板之间,用于将所述金属支撑层和所述第一电路板粘结,并电连接;第二导电胶,位于所述金属支撑层与所述第二电路板,用于将所述金属支撑层和所述第二电路板粘结,并电连接。
- 根据权利要求2所述的电路板模组,其中,所述第一接地部包括贯穿所述第一电路板的第一导通孔;所述第一导通孔的第一端与所述触控芯片的所述接地引脚电连接,第二端与所述导电连接部电连接。
- 根据权利要求2-4所述的电路板模组,其中,所述第一电路板包括第一金属图案层、第二金属图案层以及位于所述第一金属图案层和所述第二金属图案层之间的第一衬底;所述第一接地部包括:多个接地焊盘,一个所述接地焊盘与一个所述接地引脚电连接;多条第一接地引线,一条所述第一接地引线的第一端与一个所述接地焊盘电连接;所述多条第一接地引线与所述第一金属图案层同层同材料;多个第二导通孔,一个所述第二导通孔的第一端与所述第一接地引线的 第二端电连接;所述第二导通孔贯穿所述第一衬底;金属接地图案,所述金属接地图案与所述第二导通孔的第二端电连接,并与所述导电连接部电连接;所述金属接地图案与第二金属图案层同层同材料。
- 根据权利要求1所述的电路板模组,其中,所述电路板模组还包括承载板,所述第一电路板和所述第二电路板并排设置于所述承载板上;所述第一电路板包括远离所述承载板的第一表面;所述信号焊盘位于所述第一表面;所述第二电路板包括远离所述承载板的第三表面;所述至少一个导电连接部包括导电布,所述导电布设置于所述第一表面和所述第三表面所在的一侧;所述导电布与所述第一接地部和所述第二接地部电连接。
- 根据权利要求6所述的电路板模组,其中,所述第一电路板包括靠近所述触控芯片一侧的第三金属图案层;所述第一接地部包括:多个接地焊盘,一个所述接地焊盘与一个所述接地引脚电连接;多条第二接地引线,一条所述第二接地引线的第一端与一个所述接地焊盘电连接,所述第二接地引线的第二端与所述导电布电连接;所述多条第二接地引线与所述第三金属图案层同层同材料。
- 根据权利要求7所述的电路板模组,其中,所述第一接地部还包括贯穿所述第一电路板的第一导通孔;所述第一导通孔的第一端与所述触控芯片的所述接地引脚电连接;所述至少一个导电连接部还包括:金属支撑层,位于所述第一电路板远离所述触控芯片的一侧,用于支撑所述触控芯片;第一导电胶,位于所述金属支撑层和所述第一电路板之间,用于将所述金属支撑层和所述第一导通孔的第二端电连接。
- 根据权利要求2或6所述的电路板模组,其中,所述第二电路板包括第四金属图案层、第五金属图案层以及位于所述第四金属图案层和所述第五金属图案层之间的第二衬底;所述第二接地部与所述第四金属图案层同层同材料。
- 根据权利要求2或6所述的电路板模组,其中,所述第二电路板包括第四金属图案层、第五金属图案层以及位于所述第四金属图案层和所述第五金属图案层之间的第二衬底;所述第二接地部与所述第五金属图案层同层同材料;所述第二电路板还包括第三导通孔;所述第三导通孔贯穿所述第四金属图案层和所述第二衬底;所述第三导通孔的第一端与所述导电布电连接,所述第三导通孔的第二端与所述第二接地部电连接。
- 根据权利要求6所述的电路板模组,其中,所述导电布包括层叠设置的无纺布和第三导电胶;所述第三导电胶靠近所述第一电路板和所述第二电路板。
- 根据权利要求5所述的电路板模组,其中,所述第一金属图案层和所述第二金属图案层的至少一个包括多条触控走线;所述触控走线的第一端与所述触控芯片电连接,所述触控走线的第二端与所述触控显示屏电连接。
- 根据权利要求12所述的电路板模组,其中,所述电路板模组包括:第一绝缘层,位于所述第一金属图案层远离所述第一衬底的一侧,并与所述第一金属图案层相粘结;所述第一绝缘层设置有第一开口,所述触控芯片设置于所述第一开口;第二绝缘层,位于所述第二金属图案层远离所述第一衬底的一侧,并与所述第二金属图案层相粘结;所述第二绝缘层设置有第二开口,所述导电连接部设置于所述第二开口。
- 根据权利要求9或10所述的电路板模组,其中,所述第五金属图案层和所述第六金属图案层的至少一个包括多条显示信号走线;所述显示信号走线的第一端与电路板电连接,所述显示信号走线的第二端与所述触控显示屏电连接。
- 根据权利要求14所述的电路板模组,其中,所述电路板模组还包括:第三绝缘层,位于所述第四金属图案层远离所述第二衬底的一侧,并与所述第四金属图案层相粘结;所述第三绝缘层设置有第三开口,所述至少一个导电连接部设置于所述第三开口;第四绝缘层,位于所述第五金属图案层远离所述第二衬底的一侧,并与所述第五金属图案层相粘结,用于保护所述第二电路板。
- 根据权利要求15所述的电路板模组,其中,所述电路板模组还包括:电磁屏蔽层,位于所述第四绝缘层远离所述第二衬底的一侧。
- 根据权利要求6所述的电路板模组,其中,所述承载板包括:泡棉,位于所述电磁屏蔽层远离所述第四绝缘层的一侧;网格胶,位于所述泡棉远离所述电磁屏蔽层的一侧。
- 根据3或8所述的电路板模组,其中,所述金属支撑层的厚度范围为0.05~0.3mm。
- 根据权利要求13所述的电路板模组,其中,所述电路板模组还包括至少一个瞬变电压抑制二极管TVS;所述TVS管设置于所述第一开口处,与所述第一电路板电连接。
- 根据权利要求13或15所述的电路板模组,其中,所述第一绝缘层、所述第二绝缘层、所述第三绝缘层以及所述第四绝缘层组成结构和材料相同。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
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| EP21930896.2A EP4132233A4 (en) | 2021-03-19 | 2021-03-19 | PCB MODULE |
| CN202180000531.9A CN115380631B (zh) | 2021-03-19 | 2021-03-19 | 电路板模组 |
| US17/772,185 US12048086B2 (en) | 2021-03-19 | 2021-03-19 | Circuit board module and touch display apparatus |
| PCT/CN2021/081862 WO2022193306A1 (zh) | 2021-03-19 | 2021-03-19 | 电路板模组 |
| US18/744,990 US12302489B2 (en) | 2021-03-19 | 2024-06-17 | Circuit board module and touch display apparatus |
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| PCT/CN2021/081862 WO2022193306A1 (zh) | 2021-03-19 | 2021-03-19 | 电路板模组 |
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| US17/772,185 A-371-Of-International US12048086B2 (en) | 2021-03-19 | 2021-03-19 | Circuit board module and touch display apparatus |
| US18/744,990 Continuation US12302489B2 (en) | 2021-03-19 | 2024-06-17 | Circuit board module and touch display apparatus |
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| US20240147602A1 (en) | 2024-05-02 |
| US12048086B2 (en) | 2024-07-23 |
| US20240341028A1 (en) | 2024-10-10 |
| CN115380631B (zh) | 2025-04-04 |
| EP4132233A1 (en) | 2023-02-08 |
| EP4132233A4 (en) | 2023-12-27 |
| CN115380631A (zh) | 2022-11-22 |
| US12302489B2 (en) | 2025-05-13 |
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