JPS60248339A - Manufacture of laminate whose one surface is lined with metal - Google Patents

Abstract

PURPOSE:To obtain the titled laminate that will be less liable to be warped, by placing laminates each having a metal foil on resin-impregnated substrates and metal plates alternatively between press hot platens, and molding them by hot- pressing under a specified temperature rising condition. CONSTITUTION:A metal foil such as an aluminium foil is placed on a prescribed number of resin-impregnated substrates obtained by impregnating a substrate, for example, of glass fibers, for example, with a phenolic resin to produce a laminate, and such laminates and metal plates such as stainless steel plates are stacked alternatively between hot platens. Then they are molded by hot-pressing under such conditions that the heating rate of the laminates is 0.8-5 deg.C/min at 90-130 deg.C, with the heating rate gradual at higher temperature, and the heating rate of the laminate on the resin-impregnated substrate side is 1.5-3.5 deg.C, so that the desired laminates are produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method of manufacturing a laminated board used for electrical equipment, electronic machine P7, industrial equipment, etc.

[Background technology]

Conventionally, the method for manufacturing laminates is to stack a required number of resin-impregnated substrates, stack metal foils on the upper or upper and lower surfaces of the laminate, alternately stack them with metal plates, arrange a large number of them between press heating plates, and then heat them. For pressure molding, heating is approximately 160°C for phenolic resin laminates and approximately 180°C for epoxy resin laminates.
The temperature rises until the temperature reaches -1, but since there are usually 10 to 10 layers of laminated bodies between the press heating plates, it is difficult to
The heat received by the laminate differs greatly between the laminate and the laminate located in the center between the heating plates farthest from the heater, and there is a problem in that the laminate closer to the heater is particularly warped. Furthermore, when the laminate is a single-sided metal-clad laminate, the warpage tends to become even greater.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a single-sided metal-clad laminate with less warpage.

[Disclosure of the invention]

The present invention is a single-sided metal product made by stacking a required number of resin-impregnated base materials, placing metal foil on the upper surface alternately with metal plates, disposing a large number of them between press hot plates, and then heating and press-forming them. In the method for producing a stretched laminate, the heating rate of the laminate between 90 and 130°C is set at 0.8-5''O/min, and the heating rate is decreased as the temperature increases, and the heating rate of the laminate between 90 and 110°C is set at 0.8-5''O/min. The present invention will be described in detail below with reference to a method for producing a single-sided metal-clad laminate, characterized in that the heating rate on the resin-impregnated base material side is 1.5 to 3.5°C/min.

The base material of the resin-impregnated base material used in the present invention is glass, inorganic fibers such as asbestos, polyester 1v% polyamide,
Polyvinyl alcohol-A/, 7 A woven fabric, non-woven fabric, mat, paper, or a combination of these base materials made of organic synthetic fibers such as chestnut IV or natural fibers such as cotton, and the resin used to impregnate the base material is phenol resin. , cresol resin, epoxy resin, unsaturated polyester resin, melamine resin, polyimide, polybutadiene, polyamide, polyamideimide, etc. alone, modified products, mixtures, etc. are used.Water, methyl alcohol M Co V is used to adjust the viscosity as necessary. , acetone, cyclohexanone, styrene, and other solvents.

As the metal foil, a metal foil such as copper, aluminum, brass, stainless steel, iron, nickel, etc. is used, and if necessary, an adhesive may be applied to the metal foil before use.

For metal plates for laminate forming, stainless steel,
Usually used materials such as iron and hard aluminum can be used as they are, and there are no particular limitations. In addition, the material inserted between the metal plate and the heating plate, such as paper, cloth, rubber, non-woven fabric, plywood, alone or in combination with these materials, may be used as is and is not particularly limited.

The present invention minimizes distortion during resin curing by adjusting the heating rate of the laminate at the temperature at which resin curing begins, taking into account the presence of metal foil, thereby obtaining a single-sided metal-clad laminate with less warpage. The heating rate of the laminate between 90 and 130°C is 0.8 to 5'c/min, and the heating rate is decreased as the temperature increases, and the temperature of the laminate is increased between 90 and 110°C. The speed needs to be 1.5 to 3.5°C/min on the resin-impregnated base material side. Preferably, the heating rate of the laminate is 3-b for the metal foil side between 90-100°C, 1.5-2.5°C/min for the range of 120-120°C, and 120-130°C.
The temperature between ℃ is 0.8 to 1.5℃/min, and the temperature is 9 on the resin-impregnated base material side.
2.5-3.58C/min between 0-100℃, 100-1
1.5-265℃ between 10℃ and 1 between 110-120℃
．． 5-2.5℃/min, 0.8-1 between 120-130℃
．． It is desirable to keep the temperature at 3°C. In this way, distortion during resin curing can be minimized, and a single-sided metal-clad laminate with less warping can be obtained.

The present invention will be explained below using examples.

Example 1 Kraft paper with a thickness of 0.25 mm was impregnated with Pheno-M resin face so that the resin amount was 50% by weight (hereinafter simply referred to as "regret"), and dried to obtain a resin-impregnated base material. Group B, in which a laminate consisting of six laminated sheets with copper foil with an adhesive material thickness of 0.035 mm placed on the upper surface and stainless steel metal plates with a thickness of 2 mm, was placed between the hot plates. Molding pressure 100K
V', d, the heating rate of the laminate is 90 to 100 on the metal foil side.
3℃/min between ℃ and 2℃/min between 100 and 110℃,
1.5℃/min between 110-120℃, 120-130
℃: 0.8℃/min, resin-impregnated base material side: 90-100℃
2.6℃/min between ℃ and 2℃ between 100 and 110℃
/min, 1.5℃/min between 110-120℃, 120-120℃
At 130° C., heating was performed at 0.8° C./min to a final temperature of 160° C., and a single-sided copper-clad laminate having a thickness of 1.6 mm was obtained by heating and pressure molding so that the total molding time was 120 minutes.

Example 2 Eight sets of the same laminates as in Example 1 were molded under a molding pressure of 100 Kq/d.
, the heating rate of the laminate is 5 on the metal foil side between 90 and 100°C.
°C/min, 3 °C/min between 100-110 °C, 110-1
2.5°C/min between 20°C, 1.5°C/min between 120 and 130°C, and 3.5°C/min between 90 and ioo°C on the resin-impregnated base material side, and 3.5°C/min between 100 and 110°C. Then 2.5℃/
min, 2°C/min between 110-120°C, 120-130°C
℃, heating at 1.3℃/min to a final temperature of 160℃, and molding with heat and pressure so that the total molding time was 120 minutes, to a thickness of 1.
．． A 6 mm single-sided copper-clad laminate was obtained.

Conventional Example Eight sets of the same laminate as in Example 1 were molded at a pressure of 100 K9/c.
The temperature was raised until it reached 160℃ in d, and the total molding time was 12
A single-sided copper-clad laminate having a thickness of 1.6 mm was obtained by heating and pressure molding for 0 minutes.

〔Effect of the invention〕

As is clear from Table 1, the temperature distribution during laminate molding and the warp of the laminates in Examples 1 and 2 and the conventional example are uniform, and the temperature distribution during laminate molding according to the method of manufacturing a laminate of the present invention is uniform. The resulting laminates showed little warpage, confirming the superiority of the present invention.

patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] (1) One-sided metal cladding is obtained by stacking a required number of resin-impregnated substrates, placing metal foil on the top surface, and placing the laminate alternately with metal plates between press hot plates, then heating and press-forming the laminate. In a method for manufacturing a laminate. The heating rate of the laminate between 90 and 130°C is 0.8 to b, and the higher the temperature, the slower the heating rate, and further 90 to 11
The temperature increase rate of the laminate between 0°C and the resin-impregnated base material side is 1.5 to 3.
．． A method for producing a single-sided metal-clad laminate, characterized by rubbing 5'C/+.