WO2001077420A1 - Forage de trou par laser dans une tôle de cuivre - Google Patents
Forage de trou par laser dans une tôle de cuivre Download PDFInfo
- Publication number
- WO2001077420A1 WO2001077420A1 PCT/JP2001/002706 JP0102706W WO0177420A1 WO 2001077420 A1 WO2001077420 A1 WO 2001077420A1 JP 0102706 W JP0102706 W JP 0102706W WO 0177420 A1 WO0177420 A1 WO 0177420A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- copper foil
- laser
- plating
- copper
- particle layer
- 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
Links
Classifications
-
- 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
- H05K3/0038—Etching of the substrate by chemical or physical means by laser ablation of organic insulating material combined with laser drilling through a metal layer
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
-
- 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
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/382—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal
- H05K3/384—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal by plating
-
- 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
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- 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
- H05K2203/03—Metal processing
- H05K2203/0307—Providing micro- or nanometer scale roughness on a metal surface, e.g. by plating of nodules or dendrites
-
- 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
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0703—Plating
- H05K2203/0723—Electroplating, e.g. finish plating
Definitions
- the present invention relates to a copper foil excellent in laser drilling property that can efficiently form interlayer connection holes in a printed circuit board.
- the copper foil of the present invention includes not only the copper foil itself but also a copper-clad laminate or a product in which copper is directly formed on a laminate (including a plated product).
- a high-output carbon dioxide laser processing device is required.However, when such high-output carbon dioxide laser is used and laser-processed with high energy, The resin substrate to be drilled was damaged because it was processed too much, causing a problem that the hole could not be drilled in the intended shape.
- a material with high absorptance is provided on the surface of a metal with high reflectivity at the laser light wavelength, so that the material absorbs laser light and generates heat. It is also known that processing efficiency can be similarly increased by making the surface uneven.
- the present invention has been made in view of the above-described problems, and an object thereof is to improve the surface of a copper foil in manufacturing a printed circuit board, thereby making it possible to form a hole by a laser.
- An object of the present invention is to provide a copper foil which is extremely easy and is suitable for forming a small-diameter interlayer connection hole. From the above, the present invention
- Copper foil for laser drilling characterized by forming a 1-3 ⁇ m particle layer
- FIG. 1 is a microscope image of the roughened surface on which the particle layer of Example 1 was formed.
- FIG. 2 is a microscope image of the electrolytic copper foil surface of Comparative Example 1.
- FIG. 3 is a microscope image of the roughened surface on which the particle layer of Comparative Example 2 was formed.
- the present invention focuses on the surface morphology formed by the surface plating process, and as a result of further study, when a particle layer of 0.01 to 3 ⁇ is formed on the surface by plating, it has excellent hole-forming characteristics. Was obtained.
- the roughened surface of the copper foil formed by this fine 0.01-1 to 3 ⁇ m particle layer diffusely reflects laser light, and can achieve the same effect as light absorption. It has become possible to secure sufficient drilling performance even with energy.
- Ni, Co, Sn, and ZnIn which have been confirmed to be effective for drilling laser holes, as the plating metal that contains copper and is used by itself absorbs laser light.
- these alloys can be used.
- the present invention is not limited to these, and other metals can be used.
- Ni, Co, Sn, ZnIn and alloys containing no copper are used to form a particle layer of 0.01 to 3 m to improve laser drillability. It is also conceivable to let them do so. Certainly, the formation of a particle layer by such plating improved the laser drilling ability. However, such a plating layer was peeled or dropped off, and in some cases, a phenomenon was observed in which the plated layer was easily peeled off by rubbing or the like. For example, in the case where unevenness of Co alone was applied to a copper foil, sufficient drilling properties were confirmed, but the plating treatment layer was brittle, and particles were detached by rubbing.
- the overcoating may be performed under normal plating conditions (normal plating), and plating is performed without damaging the 0.011 to 3 tm particle layer formed by the roughened surface treatment. That is, it is necessary that a particle layer of 0.01 to 3 im is substantially present in this range so as not to deteriorate the drilling property by the laser beam.
- the plating for forming the overlying film may be the same plating as the roughening plating for forming the particle layer, or may be a different plating.
- Ni, Co, Sn, Zn, In and alloys thereof are good as well as the roughening plating for forming the particle layer, and the laser drilling property can be further improved.
- the copper foil used in the present invention can be applied to either an electrolytic copper foil or a rolled copper foil.
- the thickness of the copper foil is desirably 18 m or less for use as high-density wiring.
- the copper foil with improved laser drillability according to the present invention is not limited to this thickness, and can naturally be applied to a thickness larger than that.
- the particle layer (roughening treatment) formed by plating or the like can be partially applied to the surface of the copper foil irradiated with the laser beam or entirely over the copper foil. It is natural that these plating treatments and the like are required not to impair the properties of the copper foil applied to the circuit board, and the treatment of the present invention sufficiently satisfies these conditions.
- a chromium and / or zinc-containing protection treatment can be performed.
- This prevention treatment can be performed on the surface of the plating treatment, that is, partially on the laser beam irradiation surface of the copper foil or on the entire copper foil.
- the protection treatment does not impair the properties of the copper foil applied to the circuit board, and the protection treatment of the present invention sufficiently satisfies these conditions. Meet. In addition, this protection treatment hardly affects the laser drillability.
- the metal plating of the present invention for example, in order to form a plating layer of Cu, Ni, Co, Sn, Zn, In and alloys thereof, the following plating treatment can be applied. The following is a typical example. By appropriately setting the conditions within this range, roughening treatment and covering can be performed.
- this plating process shows only a preferred example, and the present invention is not limited to these examples.
- Electrolyte temperature 20 to 60 ° C
- pH 1.0 to 4.0
- Electrolyte temperature 25 to 60 ° C, pH: 1.0 to 4.0 Current density: 0.5 to 5 A / dm 2 Plating time: 0.54 seconds
- Electrolyte temperature 2 5 ⁇ 6 0 ° C, p H: 1. 0 ⁇ 4. 0 current density: 0. 5 ⁇ 5 A / dm 2 Plating time: 0 5 4 seconds
- I ⁇ concentration 10 to 50 g / L sulfuric acid: 10 to 50 g / L
- Electrolyte temperature 20 to 40 ° C
- pH 1.0 to 4.0
- Current density 1.0 220 ⁇ // (1 ⁇ 2
- plating time 0.5 to 4 seconds
- ⁇ ⁇ concentration 1 to 20 g / L, Co concentration: 1 to 30 g / L Electrolyte temperature: 25 to 50 ° C, pH: 1.5 to 4.0 Current density: 0. 5-5 AZ dm 2 , Plating time: 1-3 seconds
- Zinc concentration 1 to: L O gZL Ni concentration: 10 to 30 gZL
- Electrolyte temperature 40-50 ° C, pH: 3.0-4.0
- Electrolyte temperature 20-50 ° C, pH: 1.0-4.0
- Electrolyte temperature 20-50 ° C, pH: 1.0-4.0
- FIG. 1 is a micrograph of the roughened surface on which the particle layer is formed.
- a copper-cobalt-nickel alloy was applied to the shiny surface (S-surface) of the 12-m-thick electrolytic copper foil to form a particle layer of about 0.1 to 0.8 ⁇ , Furthermore, it was overlaid with a Co influenceu-Kockel alloy under the above plating conditions (forming a coating layer).
- the electrolytic copper foil having a thickness of 12 zm was used as it was.
- Figure 2 is a micrograph of the electrolytic copper foil surface.
- FIG. 3 is a micrograph of the roughened surface on which the particle layer is formed.
- Laser light irradiation energy (Condition 1: 25m J pulse, Condition 2: 32m JZ pulse) Laser drilling rate Laser drilling rate Due to rubbing
- Example 1 showed a drilling rate of 100% in both conditions 1 and 2, showing an extremely excellent drilling rate. . In this case, a small amount of powder falling off (peeling off or falling off of the plating layer) due to rubbing was observed, but this was not a problematic level.
- Example 2 similarly to Example 1 described above, both the condition 1 and the condition 2 showed a drilling rate of 100%, showing an extremely excellent drilling rate. In this case, there was no powder loss (peeling off or falling off of the plating layer) due to rubbing.
- Comparative Example 1 Although the copper foil itself was used, no powder dropping due to rubbing was observed, but in Condition 1, the laser drilling rate was 0, that is, drilling was practically impossible. Under condition 2, the drilling rate was only 9%, which was extremely bad. In Comparative Example 2, the drilling rate of 100% was exhibited under both the condition 1 and the condition 2, and an extremely excellent drilling rate was exhibited.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Laminated Bodies (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
- Electroplating Methods And Accessories (AREA)
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000103505A JP3330925B2 (ja) | 2000-04-05 | 2000-04-05 | レーザー穴開け用銅箔 |
| EP01917661A EP1273682A4 (en) | 2000-04-05 | 2001-03-30 | HOLE DRILLING BY LASER IN A COPPER T |
| PCT/JP2001/002706 WO2001077420A1 (fr) | 2000-04-05 | 2001-03-30 | Forage de trou par laser dans une tôle de cuivre |
| CN01802679A CN1388841A (zh) | 2000-04-05 | 2001-03-30 | 激光开孔用铜箔 |
| US10/089,581 US20020182432A1 (en) | 2000-04-05 | 2001-03-30 | Laser hole drilling copper foil |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000103505A JP3330925B2 (ja) | 2000-04-05 | 2000-04-05 | レーザー穴開け用銅箔 |
| JP2000-103505 | 2000-04-05 | ||
| PCT/JP2001/002706 WO2001077420A1 (fr) | 2000-04-05 | 2001-03-30 | Forage de trou par laser dans une tôle de cuivre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001077420A1 true WO2001077420A1 (fr) | 2001-10-18 |
Family
ID=26345056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2001/002706 Ceased WO2001077420A1 (fr) | 2000-04-05 | 2001-03-30 | Forage de trou par laser dans une tôle de cuivre |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1273682A4 (ja) |
| CN (1) | CN1388841A (ja) |
| WO (1) | WO2001077420A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10639405B2 (en) | 2014-07-22 | 2020-05-05 | Asahi Kasei Medical Co., Ltd. | Adsorbent for removing histone and purification device for liquid derived from living organism |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101065758B1 (ko) | 2003-02-27 | 2011-09-19 | 후루카와 덴키 고교 가부시키가이샤 | 전자파 실드용 동박, 그 제조방법 및 전자파 실드체 |
| US10212814B2 (en) | 2012-03-01 | 2019-02-19 | Mitsui Mining & Smelting Co., Ltd. | Copper foil provided with carrier foil, manufacturing method of the copper foil provided with carrier foil, and copper clad laminate for laser drilling manufactured by using the copper foil provided with carrier foil |
| CN111850628A (zh) * | 2020-06-12 | 2020-10-30 | 九江德福科技股份有限公司 | 一种屏蔽阴极板的打孔铜箔制作方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06169169A (ja) * | 1992-11-19 | 1994-06-14 | Nikko Guurudo Foil Kk | 印刷回路用銅箔及びその製造方法 |
| JPH06169168A (ja) * | 1992-11-19 | 1994-06-14 | Nikko Guurudo Foil Kk | 印刷回路用銅箔及びその製造方法 |
| US5482784A (en) * | 1993-12-24 | 1996-01-09 | Mitsui Mining And Smelting Co., Ltd. | Printed circuit inner-layer copper foil and process for producing the same |
| EP0960725A2 (en) * | 1998-05-29 | 1999-12-01 | Mitsui Mining & Smelting Co., Ltd. | Resin-coated composite foil, production and use thereof |
| EP0996318A2 (en) * | 1998-10-19 | 2000-04-26 | Mitsui Mining & Smelting Co., Ltd. | Novel composite foil, process for producing the same and copper-clad laminate |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2762386B2 (ja) * | 1993-03-19 | 1998-06-04 | 三井金属鉱業株式会社 | 銅張り積層板およびプリント配線板 |
| JP3367805B2 (ja) * | 1995-09-28 | 2003-01-20 | 株式会社日鉱マテリアルズ | 印刷回路用銅箔の処理方法 |
| JP3295308B2 (ja) * | 1996-06-28 | 2002-06-24 | 株式会社日鉱マテリアルズ | 電解銅箔 |
-
2001
- 2001-03-30 EP EP01917661A patent/EP1273682A4/en not_active Withdrawn
- 2001-03-30 CN CN01802679A patent/CN1388841A/zh active Pending
- 2001-03-30 WO PCT/JP2001/002706 patent/WO2001077420A1/ja not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06169169A (ja) * | 1992-11-19 | 1994-06-14 | Nikko Guurudo Foil Kk | 印刷回路用銅箔及びその製造方法 |
| JPH06169168A (ja) * | 1992-11-19 | 1994-06-14 | Nikko Guurudo Foil Kk | 印刷回路用銅箔及びその製造方法 |
| US5482784A (en) * | 1993-12-24 | 1996-01-09 | Mitsui Mining And Smelting Co., Ltd. | Printed circuit inner-layer copper foil and process for producing the same |
| EP0960725A2 (en) * | 1998-05-29 | 1999-12-01 | Mitsui Mining & Smelting Co., Ltd. | Resin-coated composite foil, production and use thereof |
| EP0996318A2 (en) * | 1998-10-19 | 2000-04-26 | Mitsui Mining & Smelting Co., Ltd. | Novel composite foil, process for producing the same and copper-clad laminate |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1273682A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10639405B2 (en) | 2014-07-22 | 2020-05-05 | Asahi Kasei Medical Co., Ltd. | Adsorbent for removing histone and purification device for liquid derived from living organism |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1273682A1 (en) | 2003-01-08 |
| CN1388841A (zh) | 2003-01-01 |
| EP1273682A4 (en) | 2003-04-16 |
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