发明申请
US20050139872A1 Drive current improvement from recessed SiGe incorporation close to gate 有权
驱动目前从嵌入式SiGe并入门口的改进

Drive current improvement from recessed SiGe incorporation close to gate
摘要:
A method (100) of forming a transistor includes forming a gate structure (106, 108) over a semiconductor body and forming recesses (112) substantially aligned to the gate structure in the semiconductor body. Silicon germanium is then epitaxially grown (114) in the recesses, followed by forming sidewall spacers (118) over lateral edges of the gate structure. The method continues by implanting source and drain regions in the semiconductor body (120) after forming the sidewall spacers. The silicon germanium formed in the recesses resides close to the transistor channel and serves to provide a compressive stress to the channel, thereby facilitating improved carrier mobility in PMOS type transistor devices.
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