公开(公告)号：US3736158A

公开(公告)日：1973-05-29

申请号：US3736158D

申请日：1971-03-19

申请人： CULLEN G ,  BOLIN S ,  MORRISON A ,  CHIH CHUN WANG

发明人： CULLEN G ,  BOLIN S ,  MORRISON A ,  CHIH CHUN WANG

IPC分类号： C30B15/00 ,  C04B35/44

CPC分类号： C30B15/00 ,  C30B29/26 ,  Y10S117/902 ,  Y10S148/129 ,  Y10S148/15

摘要： AN IMPROVED SINGLE-CRYSTAL MAGNESIUM ALUMINATE SPINEL IS GROWN FROM ALUMINA-RICH MELTS SO THAT THE RESULTING SPINEL CRYSTAL DISPLAYS A SINGLE LATTICE CONSTANT. THIS MATERIAL EXHIBITS SUPERIOR QUALITIES FOR USE AS AN EPITAXIAL SILICON SUBSTRATE, ESPECIALLY IN A VIEW OF ITS CHEMICAL STABILITY. A METHOD IS GIVEN FOR PRODUCING THESE IMPROVED SPINEL CRYSTALS BY AN ADAPTATION OF THE CZOCHRALSKI METHOD SUCH THAT CRYSTALS CAN BE PREPARED FROM NONSTOICHIOMETRIC MELTS.