Cover membrane for printed circuit board

A printed circuit board, cover film technology, applied in printed circuit parts, layered products, synthetic resin layered products, etc., can solve the problem of tensile strength, dimensional stability deterioration, non-compliance, black polyimide The problem of high cost of film 21, to achieve the effect of excellent folding resistance
CN102083271AActive Publication Date: 2011-06-01KUSN APLUS TEC CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
KUSN APLUS TEC CORP
Publication Date
2011-06-01

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Abstract

The present invention discloses a cover membrane for a printed circuit board, comprising a center layer, a black composite material layer with a low refractive index, and an adhesive layer which is used to adhere the cover membrane to the printed circuit board. The center layer is fixedly clamped between the adhesive layer and the composite material layer, the composite material layer is formed by mixing resin, a black substance with an inorganic filling material and has low refractive index and black color, therefore, the cover membrane has misty characteristic on the outer surface thereof and is suitable for the printed circuit board in need of covering the circuit patterns. Besides, the cover membrane has excellent folding resistance, and is especially suitable for a flexible printed circuit board.
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Description

Technical field

[0001] The utility invention relates to a cover film for a printed circuit board, in particular to a cover film with a composite material layer with low gloss, which can be applied to a printed circuit board that requires circuit shielding. Background technique

[0002] Printed circuit boards are an indispensable material in electronic products, and as the demand for consumer electronic products grows, the demand for printed circuit boards is also increasing. Because flexible printed circuit boards have the characteristics of flexibility and three-dimensional wiring, under the development of scientific and technological electronic products that emphasize lightness, thinness, shortness, and flexibility, they are currently widely used in computers and their peripherals, Communication products and consumer electronics products, etc.

[0003] Generally speaking, the flexible printed circuit board is mainly composed of a copper foil substrate (FCCL) and a cover film (CL...

Claims

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