Electromagnetic shielding soft base material
A kind of electromagnetic shielding material and soft technology, which is applied in the fields of magnetic/electric field shielding, electrical components, printed circuit components, etc., can solve the problem of unsuitable high-temperature-resistant operating environment, insufficient solder resistance and heat resistance of printed circuit boards etc. to achieve good electromagnetic shielding effect, good chemical resistance and solder resistance, and easy cutting
Inactive Publication Date: 2007-11-28
TEAMCHEM COMPANY
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Problems solved by technology
Take flexible printed circuit boards for mobile phones as an example. Although conductive silver glue can be coated for electromagnetic shielding at present, the price of silver glue is high, screen printing is not easy, flexibility is poor, and heat resistance is often insufficient.
caused problems in the use of some products
[0005] The pressure-sensitive adhesive tape coated on aluminum foil with pressure-sensitive adhesive (Pressure-Sensitive Adhesive) is a common electromagnetic shielding material at present. It is easy to use and low in price, but the pressure-sensitive adhesive is basically A non-permanent adhesive that softens and peels off when exposed to heat, making it unsuitable for high-temperature operating environments
Method used
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[0035] Coat the surface of aluminum foil with soft thermosetting resin. The crosslinking density of the resin can be controlled by changing the baking temperature and baking time, and the crosslinking density will affect the viscosity of the resin. Therefore, although it is only a combination of two materials, namely aluminum foil and soft thermosetting resin, it can produce a variety of electromagnetic Composite materials with functions such as shielding, heat conduction and antistatic can be applied to different product requirements.
[0036] During the heating process, the coating film of this soft thermosetting resin will firstly form a dry but sticky surface due to the volatilization of the solvent. Its characteristics are the same as those of pressure-sensitive adhesives. There is no cross-linking of the resin at this stage. , the crosslink density is zero, which can be called A-stage. When the resin is dried to the A-stage, its sticky nature is beneficial for the appl...
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The invention provides a soft substrate with the electromagnetic shielding function which is formed by being coated with soft thermosetting resin on an aluminium foil. The heat hardening resin has viscosity when is not hardened and can be directly attached to the surface of an article which requires the electromagnetic shielding. The heat-hardening resin forms a permanent bonding surface with the bonded article when is heated and hardened, with good chemical resistance and soldering resistance. When applied to electromagnetic shielding material, the invention has soft mass, easy cutting and flexible characteristics, which is not restricted by the shapes of the articles like a hard sheet-shaped electromagnetic shielding material. Compared with other electromagnetic shielding materials such as a silver colloid, a conductive adhesive, etc., the soft substrate has the advantages of better electromagnetic shielding effect, easy application, low cost, etc. Compared with an aluminium foil pressure sensitive adhesive typed electromagnetic shielding material, the soft substrate has the advantages of high adhesion, high temperature resistance and soldering resistance. The soft substrate can be applied to the field of a liquid crystal panel.
Description
technical field [0001] The present invention relates to electronic materials and electromagnetic shielding (EMS: Electromagnetic Shielding). Coat the surface of aluminum foil with soft thermosetting resin. By controlling the baking temperature and baking time, different crosslinking densities (Crosslinking Density) and viscosity (Tack) can be produced, thereby producing various types of multifunctional protective films. The protective film can have different functions such as shielding electromagnetic waves, heat transfer, anti-static or electrical insulation due to different manufacturing conditions. Background technique [0002] Electromagnetic shielding (EMS) is a necessary protection function for most electronic products, especially those involving radio wave transmission. Electromagnetic shielding (EMS) has many different approaches in practical application. Basically, the application of conductive materials is still the main one. [0003] In terms of printed circui...
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IPC IPC(8): H05K9/00H05K1/02H05K3/28
CPCY10T428/31935Y10T428/287Y10T428/31931Y10T428/2804Y10T428/31522H05K9/0084Y10T428/2848Y10T428/31511
Inventor 叶嗣韬陈尧明
Owner TEAMCHEM COMPANY