Invention Grant
- Patent Title: PMOS SiGe-last integration process
- Patent Title (中): PMOS SiGe最后一个整合过程
-
Application No.: US13283817Application Date: 2011-10-28
-
Publication No.: US08435848B2Publication Date: 2013-05-07
- Inventor: Manoj Mehrotra
- Applicant: Manoj Mehrotra
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H01L21/8238
- IPC: H01L21/8238

Abstract:
A process of forming a CMOS integrated circuit including integrating SiGe source/drains in the PMOS transistor after source/drain and LDD implants and anneals. A dual layer hard mask is formed on a polysilicon gate layer. The bottom layer prevents SiGe growth on the polysilicon gate. The top layer protects the bottom layer during source/drain spacer removal. A stress memorization layer may be formed on the integrated circuit prior to a source/drain anneal and removed prior to forming a SiGe blocking layer over the NMOS. SiGe spacers may be formed on the PMOS gate to laterally offset the SiGe recesses.
Public/Granted literature
- US20120108021A1 PMOS SiGe-LAST INTEGRATION PROCESS Public/Granted day:2012-05-03
Information query
IPC分类: