JPH10100316A - Production of metal foil,-clad laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a laminated sheet good in warpage characteristics without generating a gap between a metal foil and a cured resin-impregnated base material after lamination and curing. SOLUTION: A thermosetting resin soln. (a) used in a resin-impregnated base materials 11 becoming surface layer parts and a thermosetting resin soln. (b) used in a resin-impregnated base materials 12 becoming core parts at a time when a plurality of long resin-impregnated base materials impregnated with thermosetting resin solns. are different and metal foil 3 is arranged on one outside of the laminated impregnated base material and the metal foil 3 or an org. film is arranged to the other outside thereof and the resin- impregnated base materials 11, 12 are continuously integrated to produce a metal clad laminated sheet. Before all of the impregnated base materials are laminated, the resin-impregnated base materials 11 becoming the surface layer parts are passed through a definite gap to remove the excessive thermosetting resin soln. (a) and the resin impregnated base materials becoming the surface layer parts adjacent to the metal foils 3 are passed through the above mentioned definite gap along with the metal foils 3 to be brought into contact with the metal foils 3 under pressure.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電子機器、電気機
器等に用いられる金属箔張り積層板の製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a metal foil-clad laminate used for electronic equipment, electric equipment and the like.

【０００２】[0002]

【従来の技術】複数枚の長尺基材それぞれに熱硬化性樹
脂液を含浸して樹脂含浸基材とし、これらを積層し、さ
らに、この積層したものの少なくとも一方の外面に、金
属箔を連続的に積層して一体化した後、硬化して金属箔
張り積層板を製造する方法が知られている。そして、金
属箔張り積層板としたときの、硬化した樹脂含浸基材の
表層部と、芯部とでは要求される特性が異なる場合があ
り、このような要求に対応するために、樹脂含浸基材を
積層する際の、表層部となる樹脂含浸基材に使用する熱
硬化性樹脂液と、芯部となる樹脂含浸基材に使用する熱
硬化性樹脂液を異なる組成として製造する方法も検討さ
れている。2. Description of the Related Art A plurality of long base materials are each impregnated with a thermosetting resin liquid to form a resin-impregnated base material, which is laminated, and a metal foil is continuously formed on at least one outer surface of the laminated product. There is known a method of manufacturing a metal foil-clad laminate by laminating and integrally integrating and then curing. In the case of a metal foil-clad laminate, the required properties may differ between the surface portion of the cured resin-impregnated base material and the core portion. When laminating materials, consider a method of manufacturing a thermosetting resin liquid used for the resin-impregnated base material that becomes the surface layer and a thermosetting resin liquid used for the resin-impregnated base material that becomes the core as different compositions. Have been.

【０００３】しかし、このように表層部と、芯部とで異
なる組成の熱硬化性樹脂液を使用する場合には、得られ
る積層板の反り特性が悪いという問題が生じやすい。そ
の原因としては、樹脂含浸基材に過剰な樹脂量が付着し
ていると、樹脂含浸基材を積層した際に異なる組成の熱
硬化性樹脂液が混ざりあい、そのまま硬化するため、得
られる積層板の反り特性が悪くなるものと考えられる。
なお、使用する熱硬化性樹脂液が１種類の場合には、過
剰な樹脂が混ざりあっても、同一組成であるため、均一
性は損なわれず、従って、反り特性に大きな影響を及ぼ
さないものと推定される。[0003] However, when the thermosetting resin liquids having different compositions are used for the surface layer portion and the core portion as described above, a problem that the obtained laminate has a poor warpage characteristic is likely to occur. The reason is that if an excessive amount of resin adheres to the resin-impregnated base material, when the resin-impregnated base materials are laminated, the thermosetting resin liquids having different compositions are mixed and cured as they are, so that the resulting laminate is obtained. It is considered that the warpage characteristics of the plate deteriorated.
In addition, when one kind of thermosetting resin liquid is used, even if an excessive resin is mixed, uniformity is not impaired because of the same composition, and therefore, it does not significantly affect the warpage characteristics. Presumed.

【０００４】また、その外側に金属箔が配置される、表
層部となる樹脂含浸基材については、積層、硬化後に金
属箔と硬化した樹脂含浸基材の間に空隙が生じないよう
にするためには、ある程度過剰な樹脂量が付着している
ことが必要である。そのため、表層部となる樹脂含浸基
材に使用する熱硬化性樹脂液と、芯部となる樹脂含浸基
材に使用する熱硬化性樹脂液を異なる組成として製造す
る金属箔張り積層板では、従来、積層、硬化後に金属箔
と硬化した樹脂含浸基材の間に空隙が生じないようにす
るため、表層部となる樹脂含浸基材に過剰な樹脂量を付
着させており、そのため、得られる積層板の反り特性は
不十分である場合が多かった。[0004] Further, the resin-impregnated base material serving as a surface layer portion, on which a metal foil is disposed outside, is to prevent voids from being formed between the metal foil and the cured resin-impregnated base material after lamination and curing. Requires a certain amount of excess resin to adhere to it. Therefore, in the case of a metal foil-clad laminate manufactured with a different composition between the thermosetting resin liquid used for the resin-impregnated base material serving as the surface layer and the thermosetting resin liquid used for the resin-impregnated base material serving as the core, In order to prevent voids from being formed between the metal foil and the cured resin-impregnated base material after lamination and curing, an excessive amount of resin is adhered to the resin-impregnated base material serving as the surface layer portion. The warpage properties of the plates were often inadequate.

【０００５】[0005]

【発明が解決しようとする課題】本発明は上記のような
事情に鑑みてなされたものであって、その目的とすると
ころは、熱硬化性樹脂液を含浸した複数枚の長尺樹脂含
浸基材を積層する際の、表層部となる樹脂含浸基材に使
用する熱硬化性樹脂液と、芯部となる樹脂含浸基材に使
用する熱硬化性樹脂液が異なっていて、且つ、積層した
含浸基材の一方の外側に金属箔を、他方の外側に金属箔
又は有機フィルムを配置し、連続的に一体化させて製造
する金属箔張り積層板の製造方法であって、積層、硬化
後に金属箔と硬化した樹脂含浸基材の間に空隙を生じさ
せることなく、且つ、反り特性の良好な積層板を製造す
ることのできる新たな製造方法を提供することである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a plurality of long resin impregnated bases impregnated with a thermosetting resin liquid. When laminating the materials, the thermosetting resin liquid used for the resin-impregnated base material serving as the surface layer portion and the thermosetting resin liquid used for the resin-impregnated base material serving as the core portion are different, and are laminated. A metal foil on one side of the impregnated base material, a metal foil or an organic film is arranged on the outside of the other, a method of manufacturing a metal foil-clad laminate that is manufactured by continuous integration, lamination, after curing An object of the present invention is to provide a new manufacturing method capable of manufacturing a laminate having good warpage characteristics without generating a gap between a metal foil and a cured resin-impregnated base material.

【０００６】[0006]

【課題を解決するための手段】本発明に係る請求項１の
金属箔張り積層板の製造方法は、熱硬化性樹脂液を含浸
した複数枚の長尺樹脂含浸基材を積層する際の、表層部
となる樹脂含浸基材に使用する熱硬化性樹脂液と、芯部
となる樹脂含浸基材に使用する熱硬化性樹脂液が異なっ
ていて、且つ積層した含浸基材の一方の外側に金属箔
を、他方の外側に金属箔又は有機フィルムを配置し、連
続的に一体化させて製造する金属箔張り積層板の製造方
法において、全含浸基材を積層する前に、表層部となる
樹脂含浸基材を一定間隙を通過させて過剰な熱硬化性樹
脂液を除去し、且つ、金属箔に隣接する、表層部となる
樹脂含浸基材については、金属箔を同時に前記一定間隙
を通過させて、その金属箔と圧接させていることを特徴
とする。According to a first aspect of the present invention, there is provided a method of manufacturing a metal foil-clad laminate, comprising the steps of: laminating a plurality of long resin-impregnated substrates impregnated with a thermosetting resin liquid; The thermosetting resin liquid used for the resin-impregnated base material serving as the surface layer portion is different from the thermosetting resin liquid used for the resin-impregnated base material serving as the core portion, and one of the laminated impregnated base materials is provided outside. In the method for producing a metal foil-clad laminate in which a metal foil or an organic film is arranged on the outside of the other and the metal foil or the organic film is continuously integrated, before laminating all the impregnated base materials, a surface layer portion is formed. The resin-impregnated base material is passed through a certain gap to remove excess thermosetting resin liquid, and, adjacent to the metal foil, the resin-impregnated base material serving as a surface layer portion passes through the metal foil at the same time through the certain gap. The metal foil is pressed against the metal foil.

【０００７】本発明に係る請求項２の金属箔張り積層板
の製造方法は、請求項１記載の製造方法において、表層
部となる樹脂含浸基材に使用する基材がガラス布であ
り、芯部となる樹脂含浸基材に使用する基材がガラス不
織布であることを特徴とする。According to a second aspect of the present invention, in the method for manufacturing a metal foil-clad laminate according to the first aspect, the base material used for the resin-impregnated base material serving as the surface layer is a glass cloth, The base material used for the resin-impregnated base material to be a part is a glass nonwoven fabric.

【０００８】本発明に係る請求項３の金属箔張り積層板
の製造方法は、請求項１又は請求項２記載の製造方法に
おいて、金属箔が銅箔であることを特徴とする。According to a third aspect of the present invention, there is provided a method of manufacturing a metal foil-clad laminate according to the first or second aspect, wherein the metal foil is a copper foil.

【０００９】本発明で、全含浸基材を積層する前に、表
層部となる樹脂含浸基材を一定間隙を通過させて過剰な
熱硬化性樹脂液を除去し、且つ、金属箔に隣接する、表
層部となる樹脂含浸基材については、金属箔を同時に前
記一定間隙を通過させて、その金属箔と圧接させている
ことは、積層、硬化後に金属箔と硬化した樹脂含浸基材
の間に空隙を生じさせることなく、且つ反り特性の良好
な積層板を製造することを可能にする働きをしている。In the present invention, before laminating all the impregnated base materials, the resin-impregnated base material serving as the surface layer portion is passed through a predetermined gap to remove an excessive thermosetting resin liquid, and is adjacent to the metal foil. For the resin-impregnated base material to be the surface layer portion, the metal foil is simultaneously passed through the predetermined gap, and is pressed against the metal foil, and the lamination and curing are performed between the metal foil and the cured resin-impregnated base material. This has the function of producing a laminate having good warpage characteristics without producing voids in the laminate.

【００１０】[0010]

【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。この実施の形態では、図１に示す
ように、表層部となる樹脂含浸基材１１としてガラス布
１に含浸槽１０で熱硬化性樹脂液ａを含浸したものを使
用し、芯部となる樹脂含浸基材１２としてガラス不織布
２に含浸槽１０で熱硬化性樹脂液ｂを含浸したものを使
用している。芯部となる樹脂含浸基材１２には、必要量
丁度又は必要量を少し越える程度の熱硬化性樹脂液が付
着するように含浸槽１０での含浸は行うが、表層部とな
る樹脂含浸基材１１には、必要量を越える過剰な熱硬化
性樹脂液ａを付着させる。そして、全含浸基材を積層ロ
ール４、４間を通して積層する前に、表層部となる樹脂
含浸基材１１とそれに隣接する銅箔３を、同時に絞りロ
ール６、６間の一定間隙７を通過させて、表層部となる
樹脂含浸基材１１が持つ過剰な熱硬化性樹脂液ａを除去
すると共に、銅箔３と表層部となる樹脂含浸基材１１と
を圧接させる。絞りロール６、６間の一定間隙７は、銅
箔３と表層部となる樹脂含浸基材１１とを圧接させるこ
とができて、且つ、過剰な熱硬化性樹脂液ａを除去する
ことができる間隔を有するものであればよい。Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIG. 1, as a resin-impregnated base material 11 serving as a surface portion, a glass cloth 1 impregnated with a thermosetting resin liquid a in an impregnation tank 10 is used, and a resin serving as a core portion is used. As the impregnating base material 12, a glass nonwoven fabric 2 impregnated with the thermosetting resin liquid b in the impregnation tank 10 is used. The impregnating tank 10 is impregnated so that the required amount of the thermosetting resin liquid is adhered to the resin impregnated base material 12 serving as the core or just to slightly exceed the required amount. An excessive amount of thermosetting resin liquid a exceeding a required amount is attached to the material 11. Then, before laminating the entire impregnated base material between the laminating rolls 4, 4, the resin impregnated base material 11 serving as the surface layer and the copper foil 3 adjacent thereto are simultaneously passed through the fixed gap 7 between the drawing rolls 6, 6. Then, the excess thermosetting resin liquid a of the resin-impregnated base material 11 serving as the surface layer portion is removed, and the copper foil 3 and the resin-impregnated base material 11 serving as the surface layer portion are pressed against each other. The fixed gap 7 between the squeezing rolls 6, 6 allows the copper foil 3 and the resin-impregnated base material 11 serving as the surface layer to be brought into pressure contact with each other, and also allows the excess thermosetting resin liquid a to be removed. What is necessary is just to have an interval.

【００１１】そして、この実施の形態では図１に示すよ
うに、５枚の樹脂含浸基材１１、１２を積層したものの
両外側に銅箔３、３を配置した状態のものを、積層ロー
ル４、４間を通して一体化する。芯部となる樹脂含浸基
材１２については、図１においては、何ら過剰な熱硬化
性樹脂液を除去するような操作を施していないが、含浸
槽１０での含浸で極度に過剰な熱硬化性樹脂液を付着さ
せた場合には、絞りロール間の間隙を通過させて除去す
る等の操作を行うことが好ましい。In this embodiment, as shown in FIG. 1, a laminate of five resin-impregnated substrates 11 and 12 and copper foils 3 and 3 disposed on both outer sides is laminated on a laminating roll 4. Integrate through four spaces. In FIG. 1, the operation of removing the excessive thermosetting resin liquid is not performed on the resin-impregnated base material 12 serving as the core, but extremely excessive thermosetting due to impregnation in the impregnation tank 10 is performed. When the conductive resin liquid is adhered, it is preferable to perform an operation such as passing through a gap between the squeezing rolls and removing the same.

【００１２】次いで、硬化ゾーン５を通過させて、連続
的に両面金属箔張り積層板を製造する。なお、熱硬化性
樹脂液ａと熱硬化性樹脂液ｂは配合成分及び／又は配合
比率が異なる熱硬化性樹脂液であり、ここでいう熱硬化
性樹脂液はビニルエステル樹脂等の熱硬化性樹脂を含む
液状物のことであり、熱硬化性樹脂の他に硬化剤、添加
剤、無機フィラー等を含有することができる。Then, the laminate is passed through the curing zone 5 to continuously produce a double-sided metal foil-clad laminate. The thermosetting resin liquid a and the thermosetting resin liquid b are thermosetting resin liquids having different components and / or mixing ratios, and the thermosetting resin liquid referred to herein is a thermosetting resin such as a vinyl ester resin. A liquid material containing a resin, which can contain a curing agent, an additive, an inorganic filler, and the like in addition to the thermosetting resin.

【００１３】上記の実施の形態は、両面金属箔張り積層
板を製造するものであったが、片面金属箔張り積層板を
製造する場合には、積層した含浸基材の一方の外側に銅
箔を、他方の外側に有機フィルムを配置して製造するこ
とができる。そして、有機フィルムを配置する側の表層
部となる樹脂含浸基材は、有機フィルムと共に一定間隙
を通過させて過剰な熱硬化性樹脂液を除去することが望
ましい。しかし、全含浸基材を積層する前に、有機フィ
ルムは一定間隙を通過させず、表層部となる樹脂含浸基
材のみを一定間隙を通過させるようにしてもよい。何故
ならば、有機フィルムの場合には、硬化後に有機フィル
ムを除去してしまうのが一般的だからである。In the above embodiment, a double-sided metal foil-clad laminate is manufactured. However, when a single-sided metal foil-clad laminate is manufactured, a copper foil is provided on one outer side of the laminated impregnated base material. Can be produced by disposing an organic film on the outside of the other. It is desirable that the resin-impregnated base material serving as the surface layer on the side where the organic film is disposed is passed through a certain gap together with the organic film to remove excess thermosetting resin liquid. However, before laminating all the impregnated base materials, the organic film may not be allowed to pass through the fixed gap, but may be allowed to pass only the resin-impregnated base material serving as the surface layer part through the fixed gap. This is because in the case of an organic film, the organic film is generally removed after curing.

【００１４】[0014]

【実施例】以下、実施例及び比較例を示して本発明を説
明する。The present invention will be described below with reference to examples and comparative examples.

【００１５】（実施例１）実施の形態で説明した図１に
示す方法で両面銅箔張り積層板を製造した。原材料とし
ては次のものを使用した。表層部となる樹脂含浸基材用
のガラス布として日東紡績社製の７６２８タイプを、芯
部となる樹脂含浸基材用のガラス不織布として日本バイ
リーン社製のガラス不織布（６０ｇ／ｍ² 、厚み０．４
ｍｍ）を使用した。表層部となる樹脂含浸基材用の熱硬
化性樹脂液ａと、芯部となる樹脂含浸基材用の熱硬化性
樹脂液ｂはそれぞれ下記のものを使用した。また、銅箔
は厚みが１８μｍのものを使用した。Example 1 A double-sided copper foil-clad laminate was manufactured by the method shown in FIG. 1 described in the embodiment. The following were used as raw materials. 7628 Type of Nitto Boseki Co., Ltd. as a glass cloth resin-impregnated base material serving as a surface layer portion, the core portion and comprising as a glass nonwoven fabric resin-impregnated base material Nippon Vilene Co. nonwoven glass fabric (60 g / m ^2, thickness 0 .4
mm). The following thermosetting resin liquid a for the resin-impregnated base material serving as the surface layer portion and the following thermosetting resin liquid b for the resin-impregnated base material serving as the core portion were used. The copper foil used had a thickness of 18 μm.

【００１６】熱硬化性樹脂液ａ：ビニルエステル樹脂
（昭和高分子社製、品番Ｓ５１０）１００重量部と硬化
剤（日本油脂社製、商品名パーブチルＯ）１重量部を混
合して得られた粘度５００ｃｐｓの樹脂液 熱硬化性樹脂液ｂ：ビニルエステル樹脂（昭和高分子社
製、品番Ｓ５１０）１００重量部と硬化剤（日本油脂社
製、商品名パーブチルＯ）１重量部と無機充填材（水酸
化アルミ、住友化学工業社製、品番ＣＬ−３１０）を混
合して得られた粘度４０００ｃｐｓの樹脂液 また、製造条件は表１に示す方法で行った。得られた両
面銅箔張り積層板について、銅箔と樹脂含浸基材が硬化
した表層部との間の空隙の発生状況、銅箔をエッチング
除去した積層板の熱処理後の反り量、熱硬化性樹脂液ａ
と熱硬化性樹脂液ｂの混ざり込みの状況の評価を行い、
その結果を表１に示した。各評価方法を下記に示す。Thermosetting resin liquid a: obtained by mixing 100 parts by weight of a vinyl ester resin (manufactured by Showa Polymer Co., product number S510) and 1 part by weight of a curing agent (trade name: Perbutyl O, manufactured by NOF Corporation) Resin liquid having a viscosity of 500 cps Thermosetting resin liquid b: 100 parts by weight of a vinyl ester resin (manufactured by Showa Polymer Co., product number S510), 1 part by weight of a curing agent (manufactured by NOF Corporation, trade name: Perbutyl O), and an inorganic filler ( A resin liquid having a viscosity of 4000 cps obtained by mixing aluminum hydroxide and Sumitomo Chemical Co., Ltd., product number CL-310). Production conditions were as shown in Table 1. Regarding the obtained double-sided copper foil-clad laminate, the occurrence of voids between the copper foil and the surface layer where the resin-impregnated base material was cured, the amount of warpage after heat treatment of the copper foil-etched and removed laminate, thermosetting properties Resin liquid a
And evaluation of the situation of mixing of the thermosetting resin liquid b and
The results are shown in Table 1. Each evaluation method is shown below.

【００１７】銅箔と表層部との間の空隙の発生状況の評
価方法：両面銅箔張り積層板（大きさ５００ｍｍ×５０
０ｍｍ）の外観を観察し、表面に凹凸が生じている場合
は空隙の発生有りとし、凹凸が生じていない場合は空隙
の発生無しとした。A method for evaluating the state of the occurrence of voids between the copper foil and the surface layer portion: a double-sided copper foil-clad laminate (size 500 mm × 50)
(0 mm) was observed, and it was determined that voids were generated when the surface was uneven, and that no void was generated when no unevenness was generated.

【００１８】熱処理後の反り量の評価方法：両面銅箔張
り積層板（大きさ２５０ｍｍ×２５０ｍｍ）の銅箔をエ
ッチングで除去して得た基板を試験片とする。試験片に
対し、１５０℃、２０分の加熱処理を２回施した後、さ
らに１５０℃、２０分の加熱処理を２回施し、次いで２
４５℃の半田に４秒浸漬する加熱処理を施す。加熱処理
を終えた試験片を定盤上に置き、４隅の定盤からの持ち
上がり量の最大値を熱処理後の反り量とした。Evaluation method of warpage after heat treatment: A substrate obtained by removing a copper foil of a double-sided copper foil-clad laminate (250 mm × 250 mm) by etching is used as a test piece. The test piece was subjected to a heat treatment twice at 150 ° C. for 20 minutes, and then to a heat treatment twice at 150 ° C. for 20 minutes.
A heat treatment of immersing in solder at 45 ° C. for 4 seconds is performed. The test piece after the heat treatment was placed on a surface plate, and the maximum value of the lifting amount from the surface plate at the four corners was defined as the amount of warpage after the heat treatment.

【００１９】熱硬化性樹脂液の混ざり込みの状況の評価
方法：両面銅箔張り積層板の断面を研磨し、この断面を
目視で観察することにより熱硬化性樹脂液ａと熱硬化性
樹脂液ｂの混ざり込みが生じているかを評価する。な
お、熱硬化性樹脂液ｂは無機充填材を含んでいて、熱硬
化性樹脂液ａは無機充填材を含んでいないので、断面観
察により混ざり込みの有無を判定できる。Evaluation method for mixing of thermosetting resin liquid: A cross section of a double-sided copper foil-clad laminate is polished, and the cross section is visually observed to determine the thermosetting resin liquid a and the thermosetting resin liquid. It is evaluated whether or not b is mixed. Since the thermosetting resin liquid b contains an inorganic filler and the thermosetting resin liquid a does not contain an inorganic filler, the presence or absence of mixing can be determined by observing a cross section.

【００２０】（比較例１）図２に示す方法で両面銅箔張
り積層板を製造した。すなわち、全含浸基材を積層ロー
ル４、４間を通して積層する前に、表層部となる樹脂含
浸基材１１は絞りロール６、６間の一定間隙７を通過さ
せて過剰な熱硬化性樹脂液ａを除去するが、両側の銅箔
３は絞りロール６、６間の一定間隙７を通過させること
なしに、全含浸基材と共に積層ロール４、４間を通して
積層するようにした。以上の点以外は、実施例１と同様
にして、両面銅箔張り積層板を得、さらに、得た両面銅
箔張り積層板の評価を行い、その結果を表１に示した。
なお、原材料は実施例１と同じものを使用し、製造条件
は表１に示した。Comparative Example 1 A double-sided copper foil-clad laminate was manufactured by the method shown in FIG. That is, before laminating the entire impregnated base material between the laminating rolls 4, 4, the resin-impregnated base material 11 serving as the surface layer portion is passed through the fixed gap 7 between the drawing rolls 6, 6 and excessive Although a was removed, the copper foils 3 on both sides were laminated through the laminating rolls 4 and 4 together with the entire impregnated base material without passing through the fixed gap 7 between the drawing rolls 6 and 6. Except for the above, a double-sided copper foil-clad laminate was obtained in the same manner as in Example 1, and the obtained double-sided copper-foil-clad laminate was evaluated. The results are shown in Table 1.
The same raw materials as in Example 1 were used, and the manufacturing conditions are shown in Table 1.

【００２１】（比較例２）図３に示す方法で両面銅箔張
り積層板を製造した。すなわち、全含浸基材を積層ロー
ル４、４間を通して積層する前では、どの含浸基材も一
定間隙を通過させないようにした。従って、若干の過剰
な熱硬化性樹脂液ａ及び過剰な熱硬化性樹脂液ｂを付着
している状態の各樹脂含浸基材１１、１２を積層ロール
４、４間に導き圧接し、次いで積層ロール４、４の後に
設けた、銅箔積層ロール１２、１２で銅箔３、３と全含
浸基材とを積層するようにした。そして、積層ロール
４、４と銅箔積層ロール８、８の間を積層された樹脂含
浸基材が通過しているところに、外方から熱硬化性樹脂
液ａを供給し、樹脂含浸基材の銅箔３の接する面に熱硬
化性樹脂液ａを追加した。以上の点及び表１に示した積
層ロール４、４間の間隙の値以外は実施例１と同様にし
て、両面銅箔張り積層板を得、さらに、得た両面銅箔張
り積層板の評価を行い、その結果を表１に示した。な
お、原材料は実施例１と同じものを使用し、製造条件は
表１に示した。Comparative Example 2 A double-sided copper foil-clad laminate was manufactured by the method shown in FIG. That is, before laminating all the impregnated substrates through the laminating rolls 4, 4, none of the impregnated substrates was allowed to pass through a certain gap. Accordingly, each of the resin-impregnated base materials 11 and 12 to which a slight excess of the thermosetting resin liquid a and the excess thermosetting resin liquid b are attached is guided between the laminating rolls 4 and pressed, and then laminated. The copper foils 3, 3 and the entire impregnated base material were laminated by the copper foil lamination rolls 12, 12 provided after the rolls 4, 4. Then, the thermosetting resin liquid a is supplied from the outside to the place where the laminated resin-impregnated base material passes between the laminating rolls 4 and 4 and the copper foil laminating rolls 8 and 8, and the resin-impregnated base material is supplied. The thermosetting resin liquid a was added to the surface in contact with the copper foil 3. Except for the above points and the value of the gap between the lamination rolls 4 and 4 shown in Table 1, a double-sided copper foil-clad laminate was obtained in the same manner as in Example 1, and the obtained double-sided copper-clad laminate was evaluated. And the results are shown in Table 1. The same raw materials as in Example 1 were used, and the manufacturing conditions are shown in Table 1.

【００２２】[0022]

【表１】 [Table 1]

【００２３】表１の結果から明らかなように、本発明の
実施例１で得られた銅箔張り積層板は、比較例１及び比
較例２で得られたものに比べ、積層、硬化後に銅箔と硬
化した樹脂含浸基材の間に空隙を生じることなく、且
つ、反り特性の良好な積層板となっていることが確認さ
れた。As is clear from the results shown in Table 1, the copper foil-clad laminate obtained in Example 1 of the present invention was different from those obtained in Comparative Examples 1 and 2 in that after lamination and curing, It was confirmed that there was no void between the foil and the cured resin-impregnated substrate, and the laminate had good warpage characteristics.

【００２４】[0024]

【発明の効果】本発明の製造方法は、熱硬化性樹脂液を
含浸した複数枚の長尺樹脂含浸基材を積層する際の、表
層部となる樹脂含浸基材に使用する熱硬化性樹脂液と、
芯部となる樹脂含浸基材に使用する熱硬化性樹脂液が異
なっていて、且つ、積層した含浸基材の一方の外側に金
属箔を、他方の外側に金属箔又は有機フィルムを配置
し、連続的に一体化させて製造する金属箔張り積層板の
製造方法であって、全含浸基材を積層する前に、表層部
となる樹脂含浸基材を一定間隙を通過させて過剰な熱硬
化性樹脂液を除去し、且つ、金属箔に隣接する、表層部
となる樹脂含浸基材については、金属箔を同時に前記一
定間隙を通過させて、その金属箔と圧接させるという構
成を備える。そのため、本発明の製造方法によれば、積
層、硬化後に金属箔と硬化した樹脂含浸基材の間に空隙
を生じさせることなく、且つ、反り特性の良好な積層板
を製造することが可能になる。According to the production method of the present invention, a thermosetting resin used for a resin-impregnated base material serving as a surface layer when a plurality of long resin-impregnated base materials impregnated with a thermosetting resin liquid are laminated. Liquid and
The thermosetting resin liquid used for the resin-impregnated base material serving as the core is different, and the metal foil is arranged on one outside of the laminated impregnated base material, and the metal foil or the organic film is arranged on the other outside, A method for producing a metal foil-clad laminate that is manufactured by continuous integration, in which, before laminating all the impregnated base materials, the resin-impregnated base material serving as a surface layer portion is passed through a certain gap and excessive heat curing is performed. The resin-impregnated base material, which is to be a surface layer portion and is adjacent to the metal foil, from which the conductive resin liquid is removed, has a configuration in which the metal foil is simultaneously passed through the fixed gap and pressed against the metal foil. Therefore, according to the production method of the present invention, it is possible to produce a laminated board having good warpage characteristics without causing a gap between the metal foil and the cured resin-impregnated substrate after lamination and curing. Become.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の製造方法の実施の形態をモデル的に説
明する断面図である。FIG. 1 is a cross-sectional view schematically illustrating an embodiment of a manufacturing method according to the present invention.

【図２】比較例１における製造方法をモデル的に説明す
る断面図である。FIG. 2 is a cross-sectional view schematically illustrating a manufacturing method in Comparative Example 1.

【図３】比較例２における製造方法をモデル的に説明す
る断面図である。FIG. 3 is a cross-sectional view schematically illustrating a manufacturing method in Comparative Example 2.

【符号の説明】[Explanation of symbols]

１ ガラス布 ２ ガラス不織布 ３ 銅箔 ４ 積層ロール ５ 硬化ゾーン ６ 絞りロール ７ 間隙 ８ 銅箔積層ロール １０ 含浸槽 １１ 表層部となる樹脂含浸基材 １２ 芯部となる樹脂含浸基材 ａ、ｂ 熱硬化性樹脂液 DESCRIPTION OF SYMBOLS 1 Glass cloth 2 Glass nonwoven fabric 3 Copper foil 4 Lamination roll 5 Curing zone 6 Squeezing roll 7 Gap 8 Copper foil lamination roll 10 Impregnation tank 11 Resin-impregnated base material to be a surface layer part 12 Resin-impregnated base material to be a core part a, b Heat Curable resin liquid

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 熱硬化性樹脂液を含浸した複数枚の長尺
樹脂含浸基材を積層する際の、表層部となる樹脂含浸基
材に使用する熱硬化性樹脂液と、芯部となる樹脂含浸基
材に使用する熱硬化性樹脂液が異なっていて、且つ、積
層した含浸基材の一方の外側に金属箔を、他方の外側に
金属箔又は有機フィルムを配置し、連続的に一体化させ
て製造する金属箔張り積層板の製造方法において、全含
浸基材を積層する前に、表層部となる樹脂含浸基材を一
定間隙を通過させて過剰な熱硬化性樹脂液を除去してい
て、且つ、金属箔に隣接する、表層部となる樹脂含浸基
材については、金属箔を同時に前記一定間隙を通過させ
て、その金属箔と圧接させていることを特徴とする金属
箔張り積層板の製造方法。When a plurality of long resin-impregnated substrates impregnated with a thermosetting resin liquid are laminated, a thermosetting resin liquid used for a resin-impregnated substrate serving as a surface layer portion and a core portion serving as a core portion are provided. The thermosetting resin liquid used for the resin-impregnated base material is different, and a metal foil is arranged on one outer side of the laminated impregnated base material and a metal foil or organic film is arranged on the other outer side. In the method for manufacturing a metal foil-clad laminate manufactured by making the resin impregnated, before laminating all the impregnated base materials, remove the excess thermosetting resin liquid by passing a resin impregnated base material serving as a surface layer through a certain gap. And for the resin-impregnated base material adjacent to the metal foil and serving as the surface layer portion, the metal foil is simultaneously passed through the fixed gap and is brought into pressure contact with the metal foil. A method for manufacturing a laminate. 【請求項２】 表層部となる樹脂含浸基材に使用する基
材がガラス布であり、芯部となる樹脂含浸基材に使用す
る基材がガラス不織布であることを特徴とする請求項１
記載の金属箔張り積層板の製造方法。2. The base material used for the resin-impregnated base material serving as the surface layer portion is a glass cloth, and the base material used for the resin-impregnated base material serving as the core portion is a glass nonwoven fabric.
The method for producing a metal foil-clad laminate according to the above. 【請求項３】 金属箔が銅箔であることを特徴とする請
求項１又は請求項２記載の金属箔張り積層板の製造方
法。3. The method for producing a metal foil-clad laminate according to claim 1, wherein the metal foil is a copper foil.