Electromagnetic-shielding film, flexible substrate formed using same, and process for producing same

A flexible substrate, electromagnetic wave technology, applied in the direction of magnetic/electric field shielding, crosstalk/noise/electromagnetic interference reduction (, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of not obtaining electromagnetic wave shielding film, etc., to achieve The effect of excellent electromagnetic wave shielding effect

Active Publication Date: 2012-11-21
TATSUTA ELECTRICWIRE & CABLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the present situation is that an electromagnetic wave shielding film that maintains electromagneti

Method used

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  • Electromagnetic-shielding film, flexible substrate formed using same, and process for producing same
  • Electromagnetic-shielding film, flexible substrate formed using same, and process for producing same
  • Electromagnetic-shielding film, flexible substrate formed using same, and process for producing same

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Embodiment

[0043] Examples of the present invention are shown below, but the present invention is not limited to the following examples.

[0044] [Example, comparative example]

[0045] A two-layer structure consisting of an epoxy-based soft layer and an acrylic hard-coat layer is formed by applying and drying an epoxy-based resin to a thickness of 6 μm on a release film, and applying and drying an acrylic hard-coat liquid on top of it. protective layer (described later figure 1 , 2 symbol in 1). On this protective layer, coat the conductive paste formulated by the proportion shown in table 1, 2, and form a conductive layer by drying (the same figure 1 , 2 Symbol 2 in ) to obtain an electromagnetic wave shielding film. The following evaluations were performed using the obtained electromagnetic wave shielding film. Details of the binder resin and metal powder used are as follows.

[0046] Binder resin: Dainichi Seika Co., Ltd., polyurethane resin UD1357

[0047] Metal powder: (a) ...

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Abstract

Provided is an electromagnetic-shielding film which, even when used in a part which frequently undergoes flexing or sliding, such as the hinge or the like of a cellphone, etc., retains the effect of shielding electromagnetic waves over a long period. Also provided is a process for producing a substrate, the process including using this film to form an electromagnetic-shielding layer. The electromagnetic-shielding film comprises a conductive layer comprising (A) metal particles and (B) a binder resin and a protective layer superposed on the conductive layer. The conductive layer is a layer formed from a conductive paste containing (a) flaky metal particles having an average thickness of 50-300 nm and an average diameter of 3-10 [mu]m and (b) acicular or dendritic metal particles having an average diameter of 3-10 [mu]m.

Description

technical field [0001] The present invention relates to an electromagnetic wave shielding film, a flexible substrate using the same, and a manufacturing method thereof. More specifically, it relates to an electromagnetic wave shielding film capable of maintaining an electromagnetic wave shielding effect even after sliding for a long period of time, a flexible substrate in which an electromagnetic wave shielding layer is formed using the film, and a manufacturing method thereof. Background technique [0002] Conventionally, electromagnetic wave shielding has been performed by laminating an electromagnetic wave shielding film on a flexible substrate (FPC) disposed on a hinge portion of a mobile phone or the like. As the electromagnetic wave shielding film, an electromagnetic wave shielding film having at least a conductive layer formed of a conductive adhesive (conductive paste) in which metal powder is dispersed in a binder resin and a protective layer is used. [0003] With...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01B1/00H01B1/22
CPCH01B3/004H05K9/0083H01B1/22H05K1/0218H05K9/0009
Inventor 岩井靖柳善治登峠雅之
Owner TATSUTA ELECTRICWIRE & CABLE
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