Fishing – trapping – and vermin destroying
Patent
1991-07-18
1992-03-17
Hille, Rolf
Fishing, trapping, and vermin destroying
357 50, 357 48, 357 43, 437 62, 437974, H01L 2712, H01L 2704, H01L 2702
Patent
active
050973142
ABSTRACT:
A dielectrically isolated substrate comprises a first semiconductor wafer, a second semiconductor wafer bonded on the first semicondcutor wafer with a first insulating layer interposed therebetween, a semiconductor layer formed on the second semiconductor wafer, a first groove formed in the semiconductor layer and the second semiconductor wafer so as to reach the first insulating layer, thereby isolating the semiconductor layer and the second semiconductor wafer, and a second insulating layer formed on the side face of the first groove or embedded in the first groove. In this dielectrically isolated substrate, a high breakdown voltage element and a low breakdown voltage element are formed in a region isolated by the first groove.
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Patent Abstracts of Japan, vol. 9, No. 169 (E-328) [1982], Jul. 13, 1985; & JP-A-60 42 844 (Nippon Denki K.K.); Mar. 7, 1985.
Furukawa Kazuyoshi
Nakagawa Akio
Ogura Tsuneo
Tanzawa Katsujiro
Hille Rolf
Kabushiki Kaisha Toshiba
Limanek Robert P.
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