Invention Grant
- Patent Title: Multi-metal fill with self-align patterning
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Application No.: US16657485Application Date: 2019-10-18
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Publication No.: US10784155B2Publication Date: 2020-09-22
- Inventor: Wei-Chen Chu , Tai-I Yang , Cheng-Chi Chuang , Chia-Tien Wu
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L21/311

Abstract:
The present disclosure describes methods which employ a patterning photolithography/etch operations to form self-aligned interconnects with multi-metal gap fill. For example, the method includes a first pattern structure and a second pattern structure formed over a dielectric layer. Each of the first and second pattern structures includes a pair of spacers, and a center portion between the pair of spacers. A first opening, self-aligned to a space between the first and second pattern structures, is formed in the dielectric layer. A first conductive material is deposited in the first opening. The center portion of the second pattern structure is removed to form a void above the dielectric layer and between the pair of spacers of the second pattern structure. A second opening, self-aligned to the void, is formed in the dielectric layer; and a second conductive material is deposited in the second opening.
Public/Granted literature
- US20200051853A1 Multi-Metal Fill with Self-Align Patterning Public/Granted day:2020-02-13
Information query
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