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公开(公告)号:USRE45955E1
公开(公告)日:2016-03-29
申请号:US14452736
申请日:2014-08-06
Applicant: Tien Ying Luo , Gauri V. Karve , Daniel K. Tekleab
Inventor: Tien Ying Luo , Gauri V. Karve , Daniel K. Tekleab
CPC classification number: H01L21/823857 , H01L21/823807 , H01L21/823814 , H01L29/1054 , H01L29/4958 , H01L29/4966 , H01L29/513 , H01L29/517 , H01L29/6659 , H01L29/66651 , H01L29/7833
Abstract: A method and apparatus are described for integrating dual gate oxide (DGO) transistor devices (50, 52) and core transistor devices (51, 53) on a single substrate (15) having a silicon germanium channel layer (21) in the PMOS device areas (112, 113), where each DGO transistor device (50, 52) includes a metal gate (25), an upper gate oxide region (60, 84) formed from a second, relatively higher high-k metal oxide layer (24), and a lower gate oxide region (58, 84) formed from a first relatively lower high-k layer (22), and where each core transistor device (51, 53) includes a metal gate (25) and a core gate dielectric layer (72, 98) formed from only the second, relatively higher high-k metal oxide layer (24).
Abstract translation: 描述了用于在PMOS器件中具有硅锗沟道层(21)的单个衬底(15)上集成双栅极氧化物(DGO)晶体管器件(50,52)和核心晶体管器件(51,53)的方法和装置 区域(112,113),其中每个DGO晶体管器件(50,52)包括金属栅极(25),由第二相对较高的高k金属氧化物层(24)形成的上部栅极氧化区域(60,84) )和由第一相对较低的高k层(22)形成的下栅极氧化物区域(58,84),并且其中每个核心晶体管器件(51,53)包括金属栅极(25)和芯栅极电介质 仅由第二相对较高的高k金属氧化物层(24)形成的层(72,98)。