JPS5863439A - Continuous sheet for carrier tape - 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 has excellent processability, dimensional stability, and heat resistance.
Regarding continuous sheets for carrier tapes with excellent chemical resistance, steel foil adhesion strength, etc., in detail, the glass transition temperature after curing is A continuous sheet for a carrier tape obtained by am or impregnating and curing a thermosetting resin composition at 150° C. or higher, and a preferred embodiment is one in which the thermosetting resin composition is a cyanate ester resin composition. .

Conventionally, long carrier tape sheets have been produced by applying an epoxy resin adhesive to a Kapton film or glass cloth-based epoxy resin continuous sheet, and then adhering the epoxy resin adhesive to a steel foil.

However, turnip and ton films have a high moisture absorption rate,
There are disadvantages such as poor dimensional stability, and in the case of glass cloth base materials, punching workability is poor, and the drawing strength is weak, so the feed size may tear. This was insufficient for bonding ICs that change.

The present invention has overcome the above-mentioned drawbacks, and has successfully produced a sheet for long carrier tapes with excellent heat resistance, moisture resistance, workability, dimensional stability, and steel foil bonding stiffness. , the present invention will be explained.

First, the reinforcing base material of the present invention uses glass fiber as the warp,
It is a long mixed woven fabric using wholly aromatic polyamide fibers as the weft, and is preferably treated with a coupling agent, but it may be untreated or D-treated.

The glass fibers used for the warp here may be those used in ordinary laminates for electrical applications. In addition, the fully aromatic polyamide fiber used for the weft is a condensate of aromatic diamine and aromatic acid halide (for example, metaphenylene diamine and terephthalic acid chloride for para), or a condensate of aromatic amino acid chloride such as para-aminobenzoyl chloride. It is made from a self-condensate as a raw material and made into fibers, and commercially available products include the trade names Nomex and Kevlar.

Next, in the present invention, among the thermosetting resins that are generally known, those having a glass transition temperature of 150° C. or higher after curing are used as the thermosetting resin. Thermosetting resins include epoxy resins, polyimide resins, polyfunctional cyanate esters, polyfunctional maleimides, silicone resins,
Examples include unsaturated polyesters, phenol-modified xylene-sided diallyl resin, isocyanurates, etc.
Among these resins, those having a glass transition temperature of 150° C. or lower after curing are used in combination with other highly heat-resistant resins so that the glass transition temperature after curing is 150° C. or higher. In the present invention, 4Ik cyanate ester resin,
That is, cyanate ester resin (German patent no. 119
0184, Japan No. 111i114594206, Japanese Patent Publication No. 55-9435), cyanate ester-maleimide tree It (Japanese Patent Publication No. 54-30440), cyanate ester-maleimide-epoxy resin (Japanese Patent No. 9)
Resins containing a cyanate ester resin as an essential component, such as represented by No. 03772), are particularly preferred from various points of view such as heat resistance, adhesiveness, and processability.

The above-mentioned reinforcing base material is impregnated with the above-mentioned thermosetting resin composition, and the resin is semi-cured or hardened by heating or drying to obtain the continuous sheet for carrier tape of the present invention.

The reinforcing base material is usually rolled up, and the base material is continuously impregnated or coated with a thermosetting resin. Impregnation or coating may be a dry method or a wet method. The amount of impregnation or application of the thermosetting resin is usually such that the thickness of the reinforcing base material varies from 10 to 100 μm, but the amount of impregnation or application is such that the thickness will vary from 10 to 100 μm on the reinforcing base material. The thickness of the adhesive resin (usually 10 to 40μ),! : The overall thickness is also adjusted to fall within a certain range.

After impregnating or applying a thermosetting resin, it is heated to semi-cure or harden. The heating temperature varies depending on the resin, but
Normally, it is selected as appropriate from the range of 100 to 5 ooc.In addition, the heating or drying atmosphere is not only in air but also in an inert gas atmosphere such as 1 element. In the case of post-curing, a nitrogen atmosphere is also effective in preventing the surface of the copper foil from erupting.

The continuous sheet for carrier tape of the present invention as described above has particularly excellent dimensional stability in the longitudinal direction, and further has excellent processability, heat resistance, chemical resistance, moisture resistance, etc.

Hereinafter, the present invention will be specifically explained with reference to Examples and Comparative Examples.

Example 1 2.2-bis(4-cyanatophenyl)furopane 90
002 and bis(4-maleimidophenyl)) tough 1
After preliminarily reacting with 000t at 150'C for 150 minutes, it was converted into methyl ethyl ketone, and novolac epoxy resin (trade name: ECN-1273, manufactured by Chipa Geigy) was added.
2000f was melted to make a homogeneous solution, and 4t of zinc octylate and 3f of triethylenediamine were heated to make a varnish.◎ This varnish was mixed with 100-thick warp glass fiber and weft fully aromatic polyamide fiber (metaphenylene). Continuously impregnating cloth with diamine and isophthalic acid loride (hardware)
It was dried to produce a carrier tape material with a total thickness of 110 tones. This was coated with 20μ of heat-resistant adhesive, punched out the prescribed holes, and then continuously bonded with 55fi copper foil using a heated roll at 120°C with a width of 1500mm (line pressure). Roll it up and heat it at 130℃ for 2 hours, then at 160℃.
A continuous carrier tape was prepared by curing for 4 hours.

Table 1 shows the properties of the above carrier tape base material.

Comparative Example 2 The resin composition of Example 1 was continuously impregnated and dried using a cloth whose warp and weft were made of wholly aromatic polyamide fibers, and the rest was carried out in the same manner to prepare a carrier tape. The properties of this carrier tape material are shown in Table 1. The #* composition of Utility Model No. 1 was continuously impregnated into a cloth kneaded with glass amulet and dried, and then a carrier tape was prepared in the same manner. The properties of this carrier tape material are shown in Table 1.

Claims (1)

[Claims] t A carrier obtained by coating or impregnating a long mixed woven fabric using glass fiber as the warp and wholly aromatic polyamide fiber as the weft with a thermosetting resin composition having a glass transition temperature of 150°C or higher after curing, and curing it. Continuous sheet for tape i The continuous sheet according to claim 1, wherein the thermosetting resin composition is a cyanate ester resin composition.