公开(公告)号：US5008724A

公开(公告)日：1991-04-16

申请号：US547361

申请日：1990-07-03

申请人： Koji Shirai ,  Ken Kawamura

发明人： Koji Shirai ,  Ken Kawamura

IPC分类号： H01L27/08 ,  H01L27/06 ,  H01L29/78 ,  H01L29/861

CPC分类号： H01L27/0688 ,  H01L29/861

摘要： A semiconductor device comprising a semiconductor substrate, a field effect transistor formed in the substrate, and a diode connected to the field effect transistor and formed on the insulation film formed on the substrate. Since the diode is electrically insulated from the substrate by the insulation film, no parasitic PNPN thyristor is formed in the semiconductor substrate. Therefore, a latch-up is prevented from occurring in the semiconductor device.

公开(公告)号：US4957845A

公开(公告)日：1990-09-18

申请号：US353342

申请日：1989-05-17

申请人： Masanao Isono ,  Ken Kawamura ,  Masaya Asano ,  Tetuo Suzuki ,  Shigeo Abiko

发明人： Masanao Isono ,  Ken Kawamura ,  Masaya Asano ,  Tetuo Suzuki ,  Shigeo Abiko

IPC分类号： G03F7/09

CPC分类号： G03F7/091 ,  G03F7/092

摘要： The present invention is concerned with a printing plate of which image formation is done by photoirradiation, having a front side covered waith a peelable or removable protective layer which contains a photofading material. The printing plate is safe against fogging to light and can be used under ordinary illumination.