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SDK wave absorption sheet suits mobile electronic devices

Posted: 05 Jul 2004 ?? ?Print Version ?Bookmark and Share

Keywords:showa denko k.k.? sdk? wave absorption sheet?

Showa Denko K.K. (SDK) has developed a halogen-free, heat-resistant electromagnetic wave absorption sheet that controls noise and prevents malfunctioning of mobile electronic devices such as cellphones and digital cameras.

While electromagnetic wave absorption sheets are pasted on circuit boards and elements, the company explained, conventional sheets contain halogenated resins or halides to ensure flame retardance and high loading of magnetic materials in base resins.

As a response, the company developed environment-friendly halogen-free sheets by combining proprietary technologies for the design and processing of resin compositions, and the design and production of magnetic materials. By using magnetic properties of magnetic materials dispersed in resin, the new sheet effectively absorbs unnecessary electromagnetic wave and controls noise.

Advantages of the new product includes a UL94V-0 status (thickness of 0.1mm to 0.5mm), and heat resistance to as high as 130C. According to SDK, this enables the sheet to cope with the heat buildup resulting from the use of high-frequency LSIs.

SDK has started sample shipments of the product, with plans to start full-scale sales by the end of the year. The company will also further develop thinner halogen-free sheets (0.05mm and 0.025mm) while maintaining their high noise-control and heat-resistance characteristics to meet the demand for more compact electronic devices.

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