Invention Application
- Patent Title: FIELD EFFECT TRANSISTOR STRUCTURE WITH RECESSED INTERLAYER DIELECTRIC AND METHOD
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Application No.: US15410159Application Date: 2017-01-19
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Publication No.: US20180204920A1Publication Date: 2018-07-19
- Inventor: SIPENG GU , XUSHENG WU , WENHE LIN , JEFFREY CHEE
- Applicant: GLOBALFOUNDRIES INC.
- Applicant Address: KY GRAND CAYMAN
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY GRAND CAYMAN
- Main IPC: H01L29/417
- IPC: H01L29/417 ; H01L29/66 ; H01L21/321 ; H01L29/78 ; H01L29/08 ; H01L21/265

Abstract:
Disclosed are a field effect transistor (FET) and a FET formation method. In the FET, an interlayer dielectric (ILD) layer is positioned laterally adjacent to a sidewall spacer of a replacement metal gate and a cap layer covers the ILD layer, the sidewall spacer and the gate. However, during processing after the gate is formed but before the cap layer is formed, the ILD layer is polished and then recessed such that the top surface of the ILD layer is lower than the top surfaces of the sidewall spacer and the gate. The cap layer is then deposited such that the cap layer is, not only above the top surfaces of the ILD layer, sidewall spacer and gate, but also positioned laterally adjacent to a vertical surface of the sidewall spacer. Recessing the ILD layer prevents shorts between the gate and subsequently formed contacts to the FET source/drain regions.
Public/Granted literature
- US10026818B1 Field effect transistor structure with recessed interlayer dielectric and method Public/Granted day:2018-07-17
Information query
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