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公开(公告)号:US06627105B1
公开(公告)日:2003-09-30
申请号:US09722110
申请日:2000-11-27
申请人: Tae Kyu Kim , Jum Soo Kim , Mun Hwa Lee , Jong Woo Kim
发明人: Tae Kyu Kim , Jum Soo Kim , Mun Hwa Lee , Jong Woo Kim
IPC分类号: C04B35491
CPC分类号: C01G25/006 , C01P2002/72 , C04B35/491 , C04B2235/3249 , C04B2235/3251 , C04B2235/3296 , C04B2235/449 , C04B2235/5204 , H01L41/187
摘要: There is disclosed a method of fabricating a piezoelectric ceramics. It can obtain a small grain size and a fine grain phase by forming a combined powder being major components, stirring the combined powder with (COOH)2 water solution, dropping a Pb(NO3)2 water solution into the stirred powder, and forming a PZT powder by calcinations and sintering processes.
摘要翻译: 公开了一种制造压电陶瓷的方法。 通过形成作为主要成分的组合粉末,用(COOH)2水溶液搅拌合并的粉末,将Pb(NO 3)2水溶液滴入搅拌粉末中,可以获得小粒径和细晶粒相,并形成 PZT粉末通过煅烧和烧结过程。
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公开(公告)号:US06288946B1
公开(公告)日:2001-09-11
申请号:US09722313
申请日:2000-11-28
申请人: Sung Hoon Hong , Jae Chun An , Mun Hwa Lee , Soo Min Cho
发明人: Sung Hoon Hong , Jae Chun An , Mun Hwa Lee , Soo Min Cho
IPC分类号: G11C1300
CPC分类号: G11C16/3409 , G11C16/3404
摘要: There is disclosed a method of erasing a flash memory device. The present invention implements a dummy recovery operation after a recovery operation for recovering the threshold voltage of an over-erased memory cell is implemented. Therefore, it can reduce the flow of the leakage current through bit lines to thus improve the program characteristic of the device.
摘要翻译: 公开了一种擦除闪速存储器件的方法。 本发明实现了用于恢复过擦除存储单元的阈值电压的恢复操作之后的虚拟恢复操作。 因此,可以减少通过位线的漏电流,从而提高器件的程序特性。
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