JPH08174769A - Laminate and its manufacture - Google Patents

Abstract

PURPOSE: To facilitate perforating workability by a method wherein a specific number of sheets of a prepreg obtained by impregnating napped woven glass base material with a resin and drying, are piled up, and an amount of glass fiber in the laminate is reduced by thermally pressurizing. CONSTITUTION: Napped woven glass base material becomes a prepreg of a large space and a much resin content. When such prepreg of the much resin content is piled up and thermally heated, a flow of a resin at an initial period of heating is large, and a specific thickness can not be secured. Then, as resin varnish to be impregnated with, the resin varnish wherein 100-150 pts.wt. filler is mixed in 100 pts.wt. resin solids content to raise melt viscosity, is used. As the filler, talc, calcium, carbonate, etc., are used. That of at most 3 Mohs hardness is preferable among them. Since an amount of glass fiber in a laminate is decreased relatively, resistance to a perforating tool is little. Therefore, clean perforation can be carried out, and since the base material is a woven fabric and the fiber is continuously woven, strength can be secured.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、プリント配線板の基板
として用いられる積層板の製造方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a laminated board used as a substrate of a printed wiring board.

【０００２】[0002]

【従来の技術】プリント配線板の基板としては、ガラス
繊維基材に樹脂を含浸し、Ｂステージ迄硬化させたプリ
プレグを積層し、加熱加圧して一体化した積層板が主に
使用されている。通常、樹脂分が約４０〜６０％のプリ
プレグと金属はくとを重ねた積層体を複数組、鏡板に挟
んで熱板間に置き、加熱加圧する。繊維基材として、表
層にガラス繊維の織布を、また内層にガラス不織布を用
いた積層板は、コンポジット積層板といわれ、機械的な
強度と、穴あけ加工性をバランスさせた積層板である。2. Description of the Related Art As a substrate for a printed wiring board, a laminated plate is generally used in which a glass fiber base material is impregnated with a resin, and prepregs cured to a B stage are laminated and heated and pressed to be integrated. . Usually, a plurality of laminated bodies in which a prepreg having a resin content of about 40 to 60% and metal foil are laminated are sandwiched between end plates and placed between hot plates, and heated and pressed. A laminated board using a glass fiber woven fabric as the surface layer and a glass nonwoven fabric as the inner layer as the fiber base material is called a composite laminated board, and is a laminated board in which mechanical strength and punching workability are balanced.

【０００３】[0003]

【発明が解決しようとする課題】ところが、ガラス織布
を基材とする積層板は、穴あけ加工すると、内壁が平滑
にならない。これは、積層板中のガラス繊維の量が多い
ためである。また、コンポジット積層板も、穴あけ加工
すると、スルーホール内にクラックが入ることがあっ
た。However, the inner wall of a laminated plate having a glass woven fabric as a base material does not become smooth when drilled. This is due to the large amount of glass fibers in the laminate. Further, the composite laminated plate also sometimes had cracks in the through holes when it was drilled.

【０００４】本発明者らは、コンポジット積層板に穴あ
け加工したときのクラックの発生状況について種々調べ
た。その結果、クラックは、表層と内層との境目に集中
して発生することを見出した。不織布を基材とするプリ
プレグのみで積層板を製造すると、強度が不足する。The present inventors have made various investigations on the occurrence of cracks when a composite laminated plate is drilled. As a result, it has been found that cracks are concentrated on the boundary between the surface layer and the inner layer. When a laminated board is manufactured only with a prepreg using a nonwoven fabric as a base material, the strength is insufficient.

【０００５】本発明は、ガラス織布を基材として、必要
な強度があり、かつ、穴あけ加工性のよい積層板を製造
することができる積層板の製造方法を提供することを目
的とするものである。It is an object of the present invention to provide a method for producing a laminated board, which is made of a glass woven fabric as a base material, and which has a required strength and is excellent in hole drilling workability. Is.

【０００６】[0006]

【課題を解決するための手段】本発明は、起毛したガラ
ス織布基材に樹脂を含浸乾燥して得られたプリプレグを
所定数重ね、加熱加圧してなる積層板である。The present invention is a laminated plate obtained by stacking a predetermined number of prepregs obtained by impregnating and drying a raised woven glass substrate with a resin, and heating and pressing the prepreg.

【０００７】起毛したガラス織布基材は、横糸を２本ま
とめ、引っ張りを弱くして織ったものである。横糸に加
わる引っ張りが弱いので、繊維間の空間が大きく、した
がって、繊維重量当りの厚みも大きくなる。The woven glass woven fabric base material is made by weaving two weft threads together and weakening the tension. Since the tension applied to the weft is weak, the space between the fibers is large, and therefore the thickness per fiber weight is also large.

【０００８】このような起毛したガラス織布基材は、空
間が大きく、樹脂分の多いプリプレグとなる。このよう
に樹脂分の多いプリプレグを重ねて加熱加圧すると、加
熱初期の樹脂流れが大きく所定の厚みを確保できない。
そこで、含浸する樹脂ワニスとして、樹脂固形分１００
重量部に対し充填材を１００〜１５０重量部配合して、
溶融粘度を高くした樹脂ワニスを使用する。充填材とし
ては、タルク、炭酸カルシウム、カオリン、クレー、シ
リカ、ワラストナイト、ガラスパウダーなどが使用でき
る。なかでも、モース硬度が３以下のものが好ましい。Such a napped glass woven fabric base material has a large space and becomes a prepreg containing a large amount of resin. When the prepregs containing a large amount of resin are stacked and heated and pressurized in this manner, the resin flow in the initial stage of heating is large and a predetermined thickness cannot be secured.
Therefore, as the resin varnish to be impregnated, a resin solid content of 100
100 to 150 parts by weight of the filler is blended with respect to parts by weight,
Use a resin varnish with a high melt viscosity. As the filler, talc, calcium carbonate, kaolin, clay, silica, wollastonite, glass powder and the like can be used. Among them, those having a Mohs hardness of 3 or less are preferable.

【０００９】[0009]

【作用】積層板中のガラス繊維量を相対的に少なくでき
るので、穴あけ工具に対する抵抗が小さい。このため、
きれいな穴あけができる。しかも、基材は織布であるの
で、繊維が連続しかつ織られているいるので、繊維が不
連続で絡み合っているだけの不織布と異なり、強度も確
保できる。Since the amount of glass fiber in the laminated plate can be relatively reduced, the resistance to the drilling tool is small. For this reason,
You can make clean holes. Moreover, since the base material is a woven fabric, the fibers are continuous and woven, so that strength can be secured unlike a non-woven fabric in which the fibers are discontinuous and entangled.

【００１０】[0010]

【実施例】見かけの厚さが０．２３ｍｍのガラス織布基
材に、エポキシ樹脂１００重量部、水酸化アルミニウム
７０重量部、タルク５０重量部、カオリン３０重量部か
らなるエポキシ樹脂ワニスを含浸乾燥してプリプレグを
得た。付着樹脂量（充填材を含む）は７０重量％であっ
た。得えられたプリプレグ４枚を重ね、その両側に厚さ
３５μｍの銅はくを重ね、圧力２．９４ＭＰａ、温度１
８５℃で８５分間加熱加圧して、厚さ１．６ｍｍの積層
板を得た。得られた、積層板について直径１．０ｍｍの
ドリルで穴あけ加工した。そして、ドリル使用開始初
期、５，０００穴後、１０，０００穴後、１５，０００
穴後について、それぞれ、めっき液に１２時間浸漬し、
めっき液のしみこみ量を調べた。その結果を表１に示
す。EXAMPLE An epoxy resin varnish consisting of 100 parts by weight of epoxy resin, 70 parts by weight of aluminum hydroxide, 50 parts by weight of talc, and 30 parts by weight of kaolin is impregnated and dried on a glass woven fabric substrate having an apparent thickness of 0.23 mm. I got a prepreg. The amount of adhered resin (including the filler) was 70% by weight. The obtained four prepregs were stacked, copper foil having a thickness of 35 μm was stacked on both sides of the prepreg, and the pressure was 2.94 MPa and the temperature was 1.
The laminate was heated and pressed at 85 ° C. for 85 minutes to obtain a laminated plate having a thickness of 1.6 mm. The obtained laminated plate was perforated with a drill having a diameter of 1.0 mm. And after the start of drill use, 5,000 holes, 10,000 holes, 15,000
After the holes, soak them in the plating solution for 12 hours,
The amount of penetration of the plating solution was examined. Table 1 shows the results.

【００１１】比較のため、厚さ０．２ｍｍのガラス織布
（起毛してないもの）に実施例で用いたエポキシ樹脂
（ただし充填材を含まず）を含浸乾燥して得られたプリ
プレグ８枚を重ねて、加熱加圧して得られた厚さ１．６
ｍｍの積層板（比較例１）、及び、厚さ０．２ｍｍのガ
ラス織布に実施例で用いたエポキシ樹脂（ただし充填材
を含まず）を含浸乾燥して得られたプリプレグ２枚の間
に、ガラスペーパーに実施例と同じエポキシ樹脂ワニス
（充填材含む）を含浸乾燥して得られたプリプレグ３枚
を重ね、加熱加圧して得られた厚さ１．６ｍｍの積層板
（比較例２）についても同様なテストをした。For comparison, 8 prepregs obtained by impregnating and drying a glass woven cloth (not napped) having a thickness of 0.2 mm with the epoxy resin used in the examples (but not including the filler) And the thickness obtained by heating and pressurizing is 1.6
mm laminate plate (Comparative Example 1) and two prepregs obtained by impregnating a 0.2 mm thick glass woven fabric with the epoxy resin used in the Examples (but not including the filler) and drying. A glass paper was impregnated with the same epoxy resin varnish (including the filler) as in the example and dried, and three prepregs obtained were overlaid, and heated and pressed to obtain a 1.6 mm-thick laminate (Comparative Example 2). ) Was also tested.

【００１２】[0012]

【表１】 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ メッキしみ込み量（単位：μｍ） ─────────────────────────────── 実施例 比較例１ 比較例２ 初 期 １１．０２ ２４．４４ １７．４４ ５，０００穴 １０．８７ ２６．９０ １９．９０ １０，００１穴 １３．６１ ２８．８８ １８．８８ １５，０００穴 １２．８６ ２７．２９ １８．２９ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━[Table 1] ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Plating penetration amount (unit: μm) ────── ───────────────────────── Example Comparative Example 1 Comparative Example 2 Initial period 11.02 24.44 17.44 5,000 holes 10. 87 26.90 19.90 10,001 hole 13.61 28.88 18.88 15,000 hole 12.86 27.29 18.29 ━━━━━━━━━━━━━━━━━ ━━━━━━━━━━━━━━

【００１３】[0013]

【発明の効果】本発明によれば、起毛したガラス織布基
材に、樹脂を含浸乾燥して得られたプリプレグを、所定
数重ね、加熱加圧して積層板を製造するので、積層板中
のガラス繊維量を少なくし、穴あけ加工性に優れた積層
板を得ることができる。EFFECTS OF THE INVENTION According to the present invention, a laminated glass is manufactured by stacking a predetermined number of prepregs obtained by impregnating and drying a resin on a napped glass woven fabric base and heating and pressing the prepreg. It is possible to obtain a laminated plate having excellent glass workability by reducing the amount of glass fiber.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.⁶ 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０５Ｋ 1/03 ６１０ Ｔ 7511−4Ｅ // Ｂ２９Ｋ 63:00 105:08 105:16 309:08 Ｂ２９Ｌ 9:00 31:34 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H05K 1/03 610 T 7511-4E // B29K 63:00 105: 08 105: 16 309: 08 B29L 9:00 31:34

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 起毛したガラス織布基材に樹脂を含浸乾
燥して得られたプリプレグを所定数重ね、加熱加圧して
なる積層板。1. A laminated plate formed by stacking a predetermined number of prepregs obtained by impregnating and drying a raised woven glass substrate with a resin, and heating and pressing the prepreg. 【請求項２】 起毛したガラス織布基材に樹脂固形分１
００重量部に対し充填材を１００〜１５０重量部配合し
た樹脂ワニスを含浸乾燥して得られたプリプレグを所定
数重ね、加熱加圧することを特徴とする積層板の製造方
法。2. A resin solid content of 1 on a raised woven glass base material.
A method for producing a laminated plate, comprising: laminating a predetermined number of prepregs obtained by impregnating and drying a resin varnish containing 100 parts by weight to 100 parts by weight of a filler with respect to 00 parts by weight, and heating and pressing.