JPS6044342A - Copper lined laminated board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a sawn copper-clad laminate using a sawn nonwoven fabric as the M material.

[Techniques of Invention ((, 1の書與j) In recent years, with the rapid progress of electronic technology, copper-clad laminates are being used in a wide variety of ways, and high-quality laminates are being required.

Generally, in order to manufacture copper-clad laminates that use glass nonwoven fabric as a base material, semi-cured prepreg is prepared by impregnating glass nonwoven fabric with a synthetic resin varnish such as 1BO:1-C resin and drying it. A method in which multiple sheets are laminated, prepreg made by impregnating and drying glass cloth with synthetic resin varnish is layered on both sides of the prepreg, and then copper foil is laminated on both or one side of the prepreg and integrated by heating and pressure molding. is taken.

[Problems with the background technology] However, such copper-clad laminated materials suffer from poor heat resistance and dimensional stability. Due to the flow of the resin contained therein, there was a problem in that the C base material was likely to break, especially at the edges.

[Object of the Invention] The inventors of the present invention investigated various types of Karasu non-woven fabrics 1j that can be used to solve the conventional fflll point. As a result, they developed a Karasu non-woven fabric in which the basis weight of the edges is smaller than that of the center. It has been found that by using this method, it is possible to prevent the occurrence of breakage of the C1 base material, which facilitates the flow of the contained resin at the edges during molding.

The present invention was made based on such knowledge, and
There is an attempt to provide a copper-clad laminate that prevents the occurrence of breakage of the base material during molding.

[Summary of the Invention] In other words, the copper-clad 1ili laminate of the present invention is produced by impregnating a glass non-woven fabric with a synthetic resin varnish, drying it, stacking a plurality of semi-cured silicone preg sheets called tIC, or copper foil, etc., and then heating it. Copper-clad laminate formed by pressure forming - C1 The glass unfinished fabric is characterized in that the tsubo m of both ends thereof is smaller than that of the central part.

The glass nonwoven fabric used in the present invention has a C1 area ω smaller than that of the center portion, preferably in a width range of 1 to 10 mm from both edges. The reason why the end width is limited in this way is that if the width is less than one stroke, there will be a sufficient effect of preventing the occurrence of base material breakage in the resulting copper-clad laminate, and if it exceeds 10 m++, This is because the plate thickness at the end portion becomes thinner and the plate thickness accuracy decreases.

In addition, l'l'-Q% of the end of the crow non-woven 'fli' is:
3 to 15%, preferably 5 to 10% of the medium heat area.

Base of synthetic resin varnish used for Honko 1S1) 84
As the resin, in addition to epoxy resin, phenol resin, polyester resin, etc., flame retardants added to these resins can be used.In general, any resin that can be used as a base resin for synthetic resin varnish for impregnation can be used. It's a monkey.

The copper-clad laminate of the present invention is made of non-woven glass, synthetic resin copper-clad! i! The I-layer board is generally manufactured based on the f) method.

Tsunawa, both ends - C1 Width in the range of 1 to 10 mm, and the tsubom is smaller than the center part. The base material is Karasuma MA 4i, soaked with synthetic resin varnish for 3 times, heated * 2 dry. After the semi-cured prepreg is made 1!1, a predetermined number of sheets of this prepreg are stacked, copper foil is stacked on one side of A and both sides of LL, and they are integrated by heating and pressure molding.

In the present invention, after a predetermined number of Glass Foil II Oa +3 prepregs are stacked, crow cloth base material prepregs are stacked on both sides, and copper foil is further laminated to integrate the layers. .

[Example of the Invention] Next, Example J3 of the invention and a comparative example will be explained.

The glass non-woven fabric shown in the Examples table is impregnated with flame-retardant epoxy resin varnish and heated and dried to produce a semi-cured glass non-woven fabric.
j Obtain a base material. Similarly, a glass cloth is dipped in flame-retardant epoxy resin varnish for three times and dried under heat to obtain a semi-hardened glass cloth prepreg.

8 sheets of the 4A glass fabric prepreg obtained in this way were stacked, one sheet of glass 1'' fabric prepreg was stacked on each side of the 4A prepreg, and a printed circuit board electrolytic film with a thickness of 3511 m was roughly coated on both sides. Copper foil was arranged, and a mirror plate of stainless steel was inserted between the heated roots and heated and pressure molded at 170°C and 40 dazzle/C for 60 minutes. Manufacture copper clad laminates and IC.

Comparative Example As shown in the following table, in the example (13)
A glass nonwoven fabric having the same basis weight and thickness as the central part of the sample was prepared, and a -C copper-clad laminate was manufactured in the same manner as in the example.

When the copper-clad laminates thus obtained were examined for occurrence of C base material breakage, no base material breakage was observed in the copper-clad laminates of Examples.

(Blank above) "Effects of the Invention" As is clear from the above embodiments, according to the present invention,
Karasu non-woven material IJ71H when manufacturing copper clad laminates
A high-quality copper-clad laminate can be obtained by preventing the occurrence of substrate breakage in the A prepreg.

Representative Patent Attorney Su Yamasa -

Claims (3)

[Claims] (1) Karasu IE In a copper-clad laminate made by laminating multiple sheets of semi-cured prepreg made by impregnating and drying a synthetic resin varnish with copper foil and heating and press-molding the glass, A copper-clad laminate, characterized in that the nonwoven fabric has a tsubo ff1 smaller at both ends than at the center. (2) Widths I and L of the ends that have a smaller basis weight than the center part
. Feature '1 Claim i4!1 which is 1-10m from the edge
Copper-clad laminate described in section. (3) A glass cloth base material prepreg is interposed between the glass nonwoven fabric base material prepreg and the copper foil g7.
A copper-clad laminate according to claim 1 or 2.