Invention Grant
- Patent Title: Double barrier layer sets for contacts in semiconductor device
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Application No.: US15687591Application Date: 2017-08-28
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Publication No.: US10453747B2Publication Date: 2019-10-22
- Inventor: Aditya Kumar , Shiv Kumar Mishra , Jean-Baptiste Jacques Laloë , Wen Zhi Gao
- Applicant: GLOBALFOUNDRIES INC.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Hoffman Warnick LLC
- Agent Anthony Canale
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L21/02 ; H01L21/285 ; H01L23/532 ; H01L23/535

Abstract:
Methods of forming a contact for a semiconductor device with double barrier layer sets, and a device so formed are disclosed. Methods may include: depositing a first metal layer contacting a semiconductor substrate in a contact opening; depositing a first nitride barrier layer on the first metal layer; and annealing after depositing the first nitride barrier layer to form silicide region in a junction area underlying the contact opening with the first metal layer and the semiconductor substrate. After the annealing, a second metal layer may be deposited, followed by a second nitride barrier layer. A conductor is formed in a remaining portion of the contact opening. The double barrier layer sets prevent the formation of volcano defects and also advantageously reduce contact resistance.
Public/Granted literature
- US20190067098A1 DOUBLE BARRIER LAYER SETS FOR CONTACTS IN SEMICONDUCTOR DEVICE Public/Granted day:2019-02-28
Information query
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