Koninklijke Philips Corporation N.V.

Koninklijke Phillips Electronics N.v.

Ted Letavic

Mark Simpson

Termination of a high voltage device is achieved by a plurality of discrete deposits of charge that are deposited in varying volumes and/or spacing laterally along a termination region. The manner in which the volumes and/or spacing varies also varies between different layers of a multiple layer device. In a preferred embodiment, the variations are such that the field strength is substantially constant along any horizontal or vertical cross section of the termination region.

Method and apparatus of terminating a high voltage solid state device

A thin layer SOI high-voltage device in which the drift charge is depleted using a three-dimensional MOS capacitor structure. The drift region of the high-voltage semiconductor device is doped with a graded charge profile which increases from source-to-drain. The drift region is physically patterned to create a stripe geometry where individual SOI stripes. Each SOI stripe is individually circumscribed longitudinally by a dielectric layer wherein each dielectric layer is longitudinally circumscribed by field plates of a conducting multi-capacitor field plate layer which is electrically shorted to the substrate. The resultant structure is a thin drift-region stripe which is completely enclosed by a MOS field plate, resulting in three-dimensional depletion upon application of a bias voltage between the SOI stripe and its encapsulating field plates.

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Putnam Valley, NY, United States of America

Ted Letavic