By K. Cousins

ISBN-10: 1847351980

ISBN-13: 9781847351982

ISBN-10: 1859572812

ISBN-13: 9781859572818

This industry document offers an outline of the ecu digital elements marketplace: the polymers, the parts and the end-use software sectors. The document discusses key developments and advancements affecting the present and destiny use of polymers in digital part functions. the writer presents an research of the digital parts together with agreement manufacture. a variety of profiles of the major providers and shoppers during this quarter is additionally incorporated.

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These designs are preferred to electrolytic types because of their longer life, high rms (root mean square) current ratings and superior tolerance of surge voltages. Electronic Concepts claims to have developed a new capacitor construction in this sector which incorporates heavy metal electrodes in a very densely packed configuration. The technique is claimed to be able to extract significantly more current per microfarad at rated voltage than competing brands. • PS PS acts as an extremely loss dielectric material with low loss dielectric absorption.

The user has a choice of a wide range of resistance values and tapers. Further benefits of the conductive polymer design include essentially infinite resolution, good high frequency operation (because of its low inductance due to the flat design) and absence of a coil. In conclusion, the limitations include low wiper current ratings, low power capabilities and a moderate temperature coefficient. 37 Polymers for Electronic Components The Hybritron design combines the qualities of wire and plastic since a conductive plastic coating is added to a wire-wound element.

Indoor applications are less demanding and Bosch-Siemens uses Ticona Hostaform polyacetal in its domestic appliance switches. Ticona also supplies Vectra LCP for use in miniature short stroke switches where its high flow capacity confers high production safety standards. Typical materials for normal switches and fuseholders include PA 6, glass-filled PPA and PC where transparency is required. Heat-resisting and self-quenching (UL94 V-0) materials include diallylphthalate (DAP) and PSU. Miniature switches mounted on printed circuit boards variously use glass fibre reinforced PBT, PA, LCPs, high-temperature PPS as base materials and glass fibre reinforced POM, glass fibre reinforced PBT and PA as actuator materials.

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Polymers for Electronic Components by K. Cousins

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