Document Type and Number:
Japanese Patent JPH03120568
Kind Code:
U
Application Number:
JP2977990U
Publication Date:
December 11, 1991
Filing Date:
March 23, 1990
Export Citation:
International Classes:
C30B15/00; C30B29/42; H01L21/208; (IPC1-7): C30B15/00; C30B29/42; H01L21/208
Domestic Patent References:
JPS5551876A | 1980-04-15 | |||
JPH01108195A | 1989-04-25 | |||
JPH0196086A | 1989-04-14 | |||
JPH0274585A | 1990-03-14 |