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JP2017098390A - Wiring board manufacturing method - Google Patents

Wiring board manufacturing method Download PDF

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Publication number
JP2017098390A
JP2017098390A JP2015228281A JP2015228281A JP2017098390A JP 2017098390 A JP2017098390 A JP 2017098390A JP 2015228281 A JP2015228281 A JP 2015228281A JP 2015228281 A JP2015228281 A JP 2015228281A JP 2017098390 A JP2017098390 A JP 2017098390A
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copper
slit
thickness
double
wiring board
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JP2015228281A
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Japanese (ja)
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多田 公則
Kiminori Tada
公則 多田
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Kyocera Corp
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Kyocera Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a wiring board manufacturing method including the step of forming a slit in a double-sided copper-clad laminate by laser processing, by which the slit formation can be efficiently performed.SOLUTION: A wiring board manufacturing method comprises the steps of: preparing a double-sided copper-clad laminate 10 arranged by laminating a copper layer 2 of 10 μm or more in thickness on each face of a dielectric plate 1; etching the copper layer 2 on the double-sided copper-clad laminate 10 to selectively making the thickness of the copper layer 2 in a portion 3A to form a slit in, and a surrounding portion around it 5 μm or less; and forming, by laser processing, a slit 3 in each region where the copper layer 2 is made 5 μm or less in thickness.SELECTED DRAWING: Figure 1

Description

本発明は、スリットを有する配線基板の製造方法に関するものである。   The present invention relates to a method for manufacturing a wiring board having a slit.

従来、両面銅張積層板にスリットを形成する工程を含む配線基板の製造方法が知られている。スリットを形成する加工方法としては、プレス加工やルータ加工、レーザ加工が用いられる。なかでも、レーザ加工は、微細で高精度な加工が必要な場合等に有用である。   Conventionally, a method of manufacturing a wiring board including a step of forming a slit in a double-sided copper-clad laminate is known. As a processing method for forming the slit, press processing, router processing, or laser processing is used. Among these, laser processing is useful when fine and high-precision processing is required.

両面銅張積層板は、絶縁板の両面に銅層が積層されて成る。絶縁板としは、例えばガラス−エポキシ板等が用いられる。絶縁板の厚みは、0.1〜1mm程度である。両面の銅層の厚みは、それぞれ12〜18μm程度である。銅層としては、銅箔が好適に用いられる。   The double-sided copper-clad laminate is formed by laminating copper layers on both sides of an insulating plate. As the insulating plate, for example, a glass-epoxy plate or the like is used. The thickness of the insulating plate is about 0.1 to 1 mm. The thickness of the copper layers on both sides is about 12 to 18 μm. A copper foil is suitably used as the copper layer.

しかしながら、両面銅張積層板にレーザ加工によりスリットを形成する場合、両面の銅層の厚みがそれぞれ12〜18μmと厚いことから、これらの厚い銅層をレーザで貫通するために長時間を要し、スリットの加工効率が低いという問題点があった。   However, when slits are formed in a double-sided copper-clad laminate by laser processing, the copper layers on both sides are as thick as 12 to 18 μm, so it takes a long time to penetrate these thick copper layers with a laser. There was a problem that the processing efficiency of the slit was low.

特開2000−58923号公報JP 2000-58923 A

本発明が解決しようとする課題は、両面銅張積層板にレーザ加工によりスリットを形成する工程を含む配線基板の製造方法において、スリットの形成を効率良く行うことが可能な配線基板の製造方法を提供することにある。   The problem to be solved by the present invention is a method for manufacturing a wiring board capable of efficiently forming a slit in a method for manufacturing a wiring board including a step of forming a slit in a double-sided copper-clad laminate by laser processing. It is to provide.

本発明の配線基板の製造方法は、両面銅張積層板にレーザ加工によりスリットを形成する工程を含む配線基板の製造方法であって、絶縁板の両面にそれぞれ10μm以上の厚みの銅層が積層されて成る両面銅張積層板を準備する工程と、前記両面銅張積層板の前記銅層をエッチングして前記スリットを形成する部分およびその周囲の前記銅層の厚みを選択的にそれぞれ5μm以下にする工程と、前記銅層の厚みがそれぞれ5μm以下となった領域に前記スリットをレーザ加工により形成する工程と、を行うことを特徴とするものである。   The method for manufacturing a wiring board according to the present invention is a method for manufacturing a wiring board including a step of forming a slit in a double-sided copper-clad laminate by laser processing, and a copper layer having a thickness of 10 μm or more is laminated on both sides of an insulating plate. A step of preparing a double-sided copper-clad laminate, and a portion where the slits are formed by etching the copper layer of the double-sided copper-clad laminate and the thickness of the copper layer around it is selectively 5 μm or less, respectively. And a step of forming the slits by laser processing in regions where the thickness of the copper layer is 5 μm or less.

本発明の配線基板の製造方法によれば、両面銅張積層板の銅層をエッチングしてスリットを形成する部分およびその周囲の銅層の厚みを選択的にそれぞれ5μm以下にした後、銅層の厚みがそれぞれ5μm以下となった領域にスリットをレーザ加工により形成することから、厚みが5μm以下の薄い銅層をレーザ加工により短時間で貫通することができる。したがって、スリットの形成を極めて効率よく行うことができる。   According to the method for manufacturing a wiring board of the present invention, the copper layer of the double-sided copper-clad laminate is etched to selectively reduce the thickness of the portion where the slit is formed and the thickness of the surrounding copper layer to 5 μm or less. Since the slits are formed by laser processing in the regions where the thicknesses of the respective layers become 5 μm or less, a thin copper layer having a thickness of 5 μm or less can be penetrated in a short time by laser processing. Therefore, the slit can be formed very efficiently.

図1(a)〜(e)は、本発明の配線基板の製造方法の一実施形態例を説明するための工程毎の概略断面図である。1A to 1E are schematic cross-sectional views for each process for explaining an embodiment of a method for manufacturing a wiring board according to the present invention.

次に、本発明の配線基板の製造方法の一実施形態例を添付の図1を参照して説明する。まず、図1(a)に示すように、両面銅張積層板10を準備する。両面銅張積層板10は、絶縁板1の上下面に銅層2を積層して成る。絶縁板1は、例えばガラス−エポキシ板から成る。絶縁板1の厚みは、0.1〜1mm程度である。銅層2は、銅箔から成る。銅層2の厚みは12〜18μm程度である。両面銅張積層板10は、その一部にスリットを形成する部分3Aを有している。   Next, an embodiment of a method for manufacturing a wiring board according to the present invention will be described with reference to FIG. First, as shown to Fig.1 (a), the double-sided copper clad laminated board 10 is prepared. The double-sided copper-clad laminate 10 is formed by laminating copper layers 2 on the upper and lower surfaces of the insulating plate 1. The insulating plate 1 is made of, for example, a glass-epoxy plate. The thickness of the insulating plate 1 is about 0.1 to 1 mm. The copper layer 2 is made of a copper foil. The thickness of the copper layer 2 is about 12 to 18 μm. The double-sided copper-clad laminate 10 has a part 3A that forms a slit in a part thereof.

次に、図1(b)に示すように、両面の銅層を部分的にエッチングしてスリットを形成する部分3Aおよびその周囲の銅層2の厚みを選択的に薄くする。薄くなった部分の銅箔2の厚みは、それぞれ5μm以下とする。スリットを形成する部分3Aの周囲において銅層2の厚みを薄くする領域は、スリットを形成する領域3Aから10〜100μmの幅とする。   Next, as shown in FIG.1 (b), the copper layer of both surfaces is partially etched, and the thickness of the part 3A which forms a slit, and the copper layer 2 of the circumference | surroundings is selectively made thin. The thickness of the thinned copper foil 2 is 5 μm or less. The region where the thickness of the copper layer 2 is reduced around the portion 3A where the slit is formed is 10 to 100 μm wide from the region 3A where the slit is formed.

次に、図1(c)に示すように、スリットを形成する部分3Aにレーザ光を照射してスリット3を形成する。このとき、スリット3を形成する部分3Aにおける銅層2の厚みが5μm以下の薄いものとなっていることから、この部分における銅層2をレーザ加工により短時間で貫通することができる。したがって、スリット3の形成を極めて効率よく行うことができる。スリット3を形成するレーザとしては、YAGレーザやエキシマレーザが好適に用いられる。   Next, as shown in FIG. 1C, the slit 3 is formed by irradiating the portion 3A where the slit is formed with laser light. At this time, since the thickness of the copper layer 2 in the portion 3A where the slit 3 is formed is as thin as 5 μm or less, the copper layer 2 in this portion can be penetrated in a short time by laser processing. Therefore, the slit 3 can be formed very efficiently. As a laser for forming the slit 3, a YAG laser or an excimer laser is preferably used.

次に、図1(d)に示すように、スリット3の内壁および銅層2の表面に銅めっき層4を被着する。銅めっき層4の厚みは、5〜20μm程度とする。   Next, as shown in FIG. 1 (d), a copper plating layer 4 is deposited on the inner wall of the slit 3 and the surface of the copper layer 2. The thickness of the copper plating layer 4 shall be about 5-20 micrometers.

最後に、図1(e)に示すように、絶縁板1の両面の銅層2および銅めっき層4を所定のパターンにエッチングすることにより、銅層2および銅めっき層4から成る配線導体5を形成する。このとき、配線導体5を形成する銅層2は、スリット3の周囲以外では厚みが厚いままなので、十分な厚みの配線導体5を形成することができる。   Finally, as shown in FIG. 1 (e), the copper conductor 2 and the copper plating layer 4 on both surfaces of the insulating plate 1 are etched into a predetermined pattern to thereby form a wiring conductor 5 comprising the copper layer 2 and the copper plating layer 4. Form. At this time, since the copper layer 2 forming the wiring conductor 5 remains thick except for the periphery of the slit 3, the wiring conductor 5 having a sufficient thickness can be formed.

なお、本発明は、上述の一実施形態例に限定されるものではなく、本発明の要旨を逸脱しない範囲であれば、種々の変更は可能である。例えば、上述の一実施形態例では、銅層2は、銅箔から形成されていたが、銅層2は、銅めっき層から形成されていても良いし、銅箔および銅めっき層の積層体から形成されていてもよい。   Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the copper layer 2 is formed from a copper foil. However, the copper layer 2 may be formed from a copper plating layer, or a laminate of the copper foil and the copper plating layer. It may be formed from.

1 絶縁板
2 銅層
3 スリット
3A スリットを形成する部分
10 両面銅張積層板
DESCRIPTION OF SYMBOLS 1 Insulation board 2 Copper layer 3 Slit 3A The part which forms a slit 10 Double-sided copper clad laminated board

Claims (1)

両面銅張積層板にレーザ加工によりスリットを形成する工程を含む配線基板の製造方法であって、
絶縁板の両面にそれぞれ10μm以上の厚みの銅層が積層されて成る両面銅張積層板を準備する工程と、
前記両面銅張積層板の前記銅層をエッチングして前記スリットを形成する部分およびその周囲の前記銅層の厚みを選択的にそれぞれ5μm以下にする工程と、
前記銅層の厚みがそれぞれ5μm以下となった領域に前記スリットをレーザ加工により形成する工程と、
を行うことを特徴とする配線基板の製造方法。
A method for manufacturing a wiring board including a step of forming a slit in a double-sided copper-clad laminate by laser processing,
Preparing a double-sided copper-clad laminate in which copper layers having a thickness of 10 μm or more are laminated on both sides of the insulating plate;
Etching the copper layer of the double-sided copper-clad laminate to selectively form a portion where the slit is formed and the thickness of the copper layer around it, respectively,
Forming the slits by laser processing in regions where the thicknesses of the copper layers are each 5 μm or less;
A method for manufacturing a wiring board, comprising:
JP2015228281A 2015-11-24 2015-11-24 Wiring board manufacturing method Pending JP2017098390A (en)

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JP2015228281A JP2017098390A (en) 2015-11-24 2015-11-24 Wiring board manufacturing method

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JP2015228281A JP2017098390A (en) 2015-11-24 2015-11-24 Wiring board manufacturing method

Publications (1)

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JP2017098390A true JP2017098390A (en) 2017-06-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112276368A (en) * 2020-10-16 2021-01-29 毛震珽 Clamping type 180-degree turnover mechanism for materials and coding transportation assembly line
CN118385767A (en) * 2024-06-21 2024-07-26 深圳市摩森智控技术有限公司 A computer motherboard surface laser etching machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112276368A (en) * 2020-10-16 2021-01-29 毛震珽 Clamping type 180-degree turnover mechanism for materials and coding transportation assembly line
CN118385767A (en) * 2024-06-21 2024-07-26 深圳市摩森智控技术有限公司 A computer motherboard surface laser etching machine

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