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Conductive bonding sheet

A conductive, bonding sheet technology, applied in the direction of conductive adhesives, adhesive types, conductive materials dispersed in non-conductive inorganic materials, etc. Weak strength and other problems, to achieve the effect of good temporary fixation

Active Publication Date: 2021-03-19
TATSUTA ELECTRICWIRE & CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When performing temporary fixing in this way, if the joint strength is weak at the time of temporary fixing, the shielding film may shift in position with respect to the printed wiring board or fall off from the printed wiring board until the main curing process.

Method used

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  • Conductive bonding sheet
  • Conductive bonding sheet
  • Conductive bonding sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2、 comparative example 1

[0094] 240 parts by mass of a mixed solvent of toluene and methyl ethyl ketone (volume ratio 40:60) and mix the ingredients listed in the compounding table to prepare the adhesive compositions of Examples and Comparative Examples (solid content: 42% by mass) . The details of each ingredient used are as follows.

[0095] Urethane-modified polyester resin: Toyobo Co., Ltd., trade name "VYLON UR-3600"

[0096] Organophosphorus flame retardant: manufactured by Clariant Chemical Co., Ltd., trade name "Exolit OP935"

[0097] Epoxy resin: manufactured by Nippon Kayaku Co., Ltd., trade name "NC-2000-L"

[0098] Epoxy-based plasticizer: manufactured by ADEKA (stock), trade name "ADK Cizer O130P".

[0099] A protective layer with a thickness of 5 μm was formed by applying a resin composition for a protective layer on the surface of a PET film (thickness 25 μm) whose surface was treated with a release agent using a wire bar and heating and drying. Next, the produced copper foil with ...

reference example 1

[0102] A commercially available shielding film (manufactured by Takuta Cable Co., Ltd., trade name "PC6000U1") was used.

[0103] (evaluate)

[0104] The conductive bonding sheets of the respective shielding films obtained in Examples, Comparative Examples, and Reference Examples were evaluated as follows. The evaluation results are shown in the table.

[0105] (1) Surface state

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PUM

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Abstract

The present invention provides a conductive bonding sheet which has good temporary fixity even if the surface smoothness is low. The conductive bonding sheet has a storage modulus peak temperature of120 DEG C or less and an average arithmetic surface roughness Ra of 0.1 [mu] m or more on an attachment surface. The conductive bonding sheet preferably includes a binder component and metal particles. The binder component preferably includes an epoxy resin and a urethane-modified polyester resin. Preferably, the conductive bonding sheet further comprises a plasticizer.

Description

technical field [0001] The present invention relates to a conductive bonding sheet. More specifically, the present invention relates to a conductive bonding sheet used for an electromagnetic wave shielding film used for bonding to a printed wiring board. Background technique [0002] Conductive adhesives are often used in printed circuit boards. For example, an electromagnetic wave shielding film used for bonding to a printed wiring board (hereinafter also simply referred to as a “shielding film”) includes a shielding layer such as metal foil and a conductive bonding sheet provided on the surface of the shielding layer. The conductive bonding sheet is formed by, for example, coating a conductive adhesive on the surface of the shielding layer in a sheet shape, and it bonds the shielding layer to the surface of the printed wiring board, and conducts the ground pattern of the printed wiring board and the shielding layer. . [0003] Such a conductive bonding sheet needs to cl...

Claims

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Application Information

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IPC IPC(8): C09J7/30C09J7/22C09J7/28C09J9/02C09J11/04C09J11/06C09J163/00C09J167/00H01B1/22H05K1/03
CPCC09J7/28C09J7/30C09J7/22C09J11/04C09J11/06C09J9/02C09J163/00C09J167/00H01B1/22H05K1/03C09J2203/326C09J2301/312
Inventor 青柳庆彦上农宪治
Owner TATSUTA ELECTRICWIRE & CABLE
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