Invention Grant
- Patent Title: Method for producing self-aligned vias
- Patent Title (中): 生产自对准通孔的方法
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Application No.: US15071247Application Date: 2016-03-16
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Publication No.: US09484258B1Publication Date: 2016-11-01
- Inventor: Ryan Ryoung-han Kim , Wenhui Wang , Lei Sun , Erik Verduijn , Yulu Chen
- Applicant: GLOBALFOUNDRIES Inc.
- Applicant Address: GB Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: GB Grand Cayman
- Agency: Ditthavong & Steiner, P.C.
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L23/528

Abstract:
A method for producing self-aligned vias (SAV) is provided. Embodiments include forming a ILOS layer over a dielectric layer; forming pairs of spacers over the ILOS layer, each pair of spacers having a first filler formed between adjacent spacers, and a second filler formed between each pair of spacers; forming and patterning a first OPL to expose one second filler, spacers on opposite sides of the one second filler, and a portion of the first filler adjacent each of the exposed spacers; removing the one second filler to form a SAV, and SAV etching into the ILOS layer; forming a second OPL over the first OPL and in the SAV to form a SAV plug; removing OPL layers and etching into the ILOS layer down to the dielectric layer; forming a third OPL layer in spaces between the TEOS layer; and removing the SAV plug.
Information query
IPC分类: