- 专利标题: DOUBLE BARRIER LAYER SETS FOR CONTACTS IN SEMICONDUCTOR DEVICE
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申请号: US15687591申请日: 2017-08-28
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公开(公告)号: US20190067098A1公开(公告)日: 2019-02-28
- 发明人: Aditya Kumar , Shiv Kumar Mishra , Jean-Baptiste Jacques Laloë , Wen Zhi Gao
- 申请人: GLOBALFOUNDRIES INC.
- 主分类号: H01L21/768
- IPC分类号: H01L21/768 ; H01L21/02 ; H01L21/285 ; H01L23/532 ; H01L23/535
摘要:
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.
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