Invention Grant
- Patent Title: Contact for high-K metal gate device
- Patent Title (中): 高K金属门装置的接触
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Application No.: US13289112Application Date: 2011-11-04
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Publication No.: US08546227B2Publication Date: 2013-10-01
- Inventor: Hak-Lay Chuang , Sheng-Chen Chung , Wei Cheng Wu , Bao-Ru Young , Huan-Just Lin , Tsai-Chun Li
- Applicant: Hak-Lay Chuang , Sheng-Chen Chung , Wei Cheng Wu , Bao-Ru Young , Huan-Just Lin , Tsai-Chun Li
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Haynes and Boone, LLP
- Main IPC: H01L21/336
- IPC: H01L21/336 ; H01L21/44

Abstract:
A method of making an integrated circuit includes providing a substrate with a high-k dielectric and providing a polysilicon gate structure over the high-k dielectric. A doping process is performed on the substrate adjacent to the polysilicon gate structure, after which the polysilicon gate structure is removed and replaced with a metal gate structure. An interlayer dielectric (ILD) is deposited over the metal gate structure and the doped substrate, and a dry etch process forms a trench in the ILD to a top surface of the metal gate structure. After the dry etch process, a wet etch process forms an undercut near the top surface of the metal gate structure. The trench and undercut are then filled with a conductive material.
Public/Granted literature
- US20130069174A1 CONTACT FOR HIGH-K METAL GATE DEVICE Public/Granted day:2013-03-21
Information query
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