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US08129234B2 Method of forming bipolar transistor integrated with metal gate CMOS devices
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与金属栅极CMOS器件集成的双极晶体管的形成方法
- 专利标题: Method of forming bipolar transistor integrated with metal gate CMOS devices
- 专利标题(中): 与金属栅极CMOS器件集成的双极晶体管的形成方法
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申请号: US12556205申请日: 2009-09-09
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公开(公告)号: US08129234B2公开(公告)日: 2012-03-06
- 发明人: Thomas A. Wallner , Ebenezer E. Eshun , Daniel J. Jaeger , Phung T. Nguyen
- 申请人: Thomas A. Wallner , Ebenezer E. Eshun , Daniel J. Jaeger , Phung T. Nguyen
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Scully, Scott, Murphy & Presser, P.C.
- 代理商 H. Daniel Schnurmann
- 主分类号: H01L21/8249
- IPC分类号: H01L21/8249
摘要:
A high-k gate dielectric layer and a metal gate layer are formed and patterned to expose semiconductor surfaces in a bipolar junction transistor region, while covering a CMOS region. A disposable material portion is formed on a portion of the exposed semiconductor surfaces in the bipolar junction transistor area. A semiconductor layer and a dielectric layer are deposited and patterned to form gate stacks including a semiconductor portion and a dielectric gate cap in the CMOS region and a cavity containing mesa over the disposable material portion in the bipolar junction transistor region. The disposable material portion is selectively removed and a base layer including an epitaxial portion and a polycrystalline portion fills the cavity formed by removal of the disposable material portion. The emitter formed by selective epitaxy fills the cavity in the mesa.
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