Invention Grant
- Patent Title: Reverse tone self-aligned contact
- Patent Title (中): 反向音自对准接触
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Application No.: US14180460Application Date: 2014-02-14
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Publication No.: US09412656B2Publication Date: 2016-08-09
- Inventor: Ching-Feng Fu , Yu-Chan Yen , Chia-Ying Lee
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Eschweiler & Associates, LLC
- Main IPC: H01L21/32
- IPC: H01L21/32 ; H01L21/44 ; H01L21/768 ; H01L29/417 ; H01L29/423 ; H01L29/66 ; H01L21/3105 ; H01L29/78 ; H01L29/165

Abstract:
Some embodiments of the present disclosure relate to a method to form a source/drain self-aligned contact to a transistor or other semiconductor device. The method comprises forming a pair of gate structures over a substrate, and forming a source/drain region between the pair of gate structures. The method further comprises forming a sacrificial source/drain contact which is arranged over the source/drain region and which is arranged laterally between neighboring sidewalls of the pair of gate structures. The method further comprises forming a dielectric layer which extends over the sacrificial source/drain contact and over the pair of gate structures. The dielectric layer differs from the sacrificial source/drain contact. The method further comprises removing a portion of the dielectric layer over the sacrificial source/drain contact and subsequently removing the sacrificial source/drain contact to form a recess, and filling the recess with a conductive material to form a source/drain contact.
Public/Granted literature
- US20150235897A1 Reverse Tone Self-Aligned Contact Public/Granted day:2015-08-20
Information query
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