Invention Grant
- Patent Title: Forming silicided gate and contacts from polysilicon germanium and structure formed
- Patent Title (中): 形成硅化物栅极和多晶锗的接触形成结构
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Application No.: US11734888Application Date: 2007-04-13
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Publication No.: US07718513B2Publication Date: 2010-05-18
- Inventor: Huilong Zhu , Wenjuan Zhu , Zhijiong Luo
- Applicant: Huilong Zhu , Wenjuan Zhu , Zhijiong Luo
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Hoffman Warnick LLC
- Agent Joseph Petrokaitis
- Main IPC: H01L21/20
- IPC: H01L21/20

Abstract:
Methods of forming silicided contacts self-aligned to a gate from polysilicon germanium and a structure so formed are disclosed. One embodiment of the method includes: forming a polysilicon germanium (poly SiGe) pedestal over a gate dielectric over a substrate; forming a poly SiGe layer over the poly SiGe pedestal, the poly SiGe layer having a thickness greater than the poly SiGe pedestal; doping the poly SiGe layer; simultaneously forming a gate and a contact to each side of the gate from the poly SiGe layer, the gate positioned over the poly SiGe pedestal; annealing to drive the dopant from the gate and the contacts into the substrate to form a source/drain region below the contacts; filling a space between the gate and the contacts; and forming silicide in the gate and the contacts.
Public/Granted literature
- US20080251856A1 FORMING SILICIDED GATE AND CONTACTS FROM POLYSILICON GERMANIUM AND STRUCTURE FORMED Public/Granted day:2008-10-16
Information query
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