JPS5964350A - Glass-cloth base material 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 The present invention relates to a laminate that requires high dimensional stability, such as for use in printed wiring boards. The aim is to solve the problem of directionality and reduce the time and effort involved in processing printed wiring boards.

The glass cloth base material used for conventional glass cloth base material laminates has a number of vertical and horizontal threads of 0 to 15 threads.The laminates obtained with 0 to 15 threads are also processed into printed wiring boards without undergoing aging treatment. During heating, there will be a difference in the rate of dimensional change in the vertical and horizontal directions, so when measuring and cutting the printed wiring board from the laminate, take 6 dimensions in a fixed direction, such as vertically if it is vertically. It was necessary to do so, and the trouble and wasted loss in taking measurements had become a problem. Or, there are restrictions on the vertical and horizontal directions (when dimensioning or cutting, it is necessary to heat and press items in the same direction to control the rate of dimensional change, which requires a lot of effort, and it is also easy to mix in items that are oriented in the actual direction. 1 defect occurrence
It was the cause of this.

The present invention solves the above-mentioned drawbacks, and consists of a glass cloth base material with a difference in the number of threads inserted in the vertical and horizontal directions of 0 to 5 and a laminate resin, and is aged after molding. Therefore, there is almost no difference in the rate of dimensional change in the vertical and horizontal directions, so when processing a laminate into a printed wiring board, dimensions can be taken in either the vertical or the horizontal direction, greatly reducing the time and effort required to process the printed wiring board. This simplifies the process and further increases (reduces) the risk of defects.

The present invention will be explained in detail below. In the present invention (the glass cloth base ladle to be used must have a difference in the number of threads inserted in the vertical and horizontal directions of 0 to 5). There are no particular limitations on the thread diameter, number of threads, weight, etc., but preferably the thread diameter is 0.004 to 0.008, and the number of threads is 35 to 35.
45 pieces/25 lines, Maki 30-40 pieces 72511111.
From the viewpoint of overall balance, it is desirable to use a plain-woven glass cloth with a weight of 30 to 150 g/ff1'. As the resin for the laminate, thermosetting resins in general such as epoxy resin, phenol resin, unsaturated polyester resin, melamine resin, polyimide, polyamide, polyamideimide, polybutadiene, etc. can be used, but it is preferable to use epoxy resin. This is desirable in terms of balance. In addition, by overlapping and molding fluorescent foil on the upper or lower surface of the resin-impregnated base material, it is possible to
^ It is also possible to obtain foil-covered laminates.

Although the aging treatment is not particularly limited, it is preferable to heat the material at a temperature between the molding temperature or a little h- for the same time as the molding time or for a slightly longer time, using a tunnel furnace, heating furnace, or the like.

The present invention will be explained below using examples.

Example 1 Fiber diameter Q, 007■, number of implants vertically 39/25, horizontally 3
A plain weave glass cloth base material of 5 pieces/25 pieces, heavy*xoog7rrr was impregnated with epoxy resin varnish and dried to obtain a prepreg with a resin content of 50% (hereinafter the percentage is not indicated as %),
After stacking the 5 sheets of prepreg, molding pressure cuff 0 ky /
cM, laminate molding was carried out at 165°C for 120 minutes, and further aging treatment was performed at 175°C for 180 minutes to obtain a laminate.

Example 2 Copper foils with a thickness of 35 microns were placed on the upper and lower surfaces of the same five prepreg sheets as in Example 1, and then treated in the same manner as in Example 1 to obtain a copper-clad laminate.

Conventional example 1 Fiber diameter 0.007mm, number of threads vertically 45/25mm, width 3
2 pieces/25m, ff1tit 100g/
A laminate was obtained in the same manner as in Example 1 except that rrr plain weave glass cloth was used and no aging treatment was performed.

Conventional Example 2 Same as Conventional Example 1, 5 sheets of prepreg, thickness 35 mm on the bottom surface.
After placing a micron copper foil on it, it was treated in the same manner as in Conventional Example 1 to obtain a copper-clad laminate.

As is clear from Table 1, the dimensional change rates in the vertical and lateral directions of the laminates of Examples 1 and 2 and Conventional Examples 1 and 2 are the same as the dimensional change rates in the vertical and lateral directions of the uninvented glass cloth base laminate. The difference was small and the variation was also small, confirming the superiority of the glass cloth base laminate of the present invention.

Table 1 patent applicant Matsushita Electric Works Co., Ltd. Agent Masu Toshimaru Takemoto (2 others) 288

Claims (1)

[Claims] A glass cloth substrate laminate comprising a glass cloth substrate with a difference in the number of threads inserted in the vertical and horizontal directions of 0 to 5 and a resin for the laminate, and further subjected to an aging treatment after molding.