发明授权
US08525186B2 Method of forming a planar field effect transistor with embedded and faceted source/drain stressors on a silicon-on-insulator (SOI) wafer, a planar field effect transistor structure and a design structure for the planar field effect transistor 有权
在绝缘体上硅(SOI)晶片上形成具有嵌入和刻面源极/漏极应力的平面场效应晶体管的方法,平面场效应晶体管结构和用于平面场效应晶体管的设计结构

Method of forming a planar field effect transistor with embedded and faceted source/drain stressors on a silicon-on-insulator (SOI) wafer, a planar field effect transistor structure and a design structure for the planar field effect transistor
摘要:
Disclosed are embodiments of a method of forming, on an SOI wafer, a planar FET with embedded and faceted source/drain stressors. The method incorporates a directional ion implant process to create amorphous regions at the bottom surfaces of source/drain recesses in a single crystalline semiconductor layer of an SOI wafer. Then, an etch process selective to different crystalline planes over others and further selective to single crystalline semiconductor material over amorphous semiconductor material can be performed in order to selectively adjust the shape (i.e., the profile) of the recess sidewalls without increasing the depth of the recesses. Subsequently, an anneal process can be performed to re-crystallize the amorphous regions and an epitaxial deposition process can be used to fill the recesses with source/drain stressor material. Also disclosed are embodiments of a planar FET structure and a design structure for the planar FET.
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