Invention Application
- Patent Title: SELF-ALIGNED METAL CUT AND VIA FOR BACK-END-OF-LINE (BEOL) PROCESSES FOR SEMICONDUCTOR INTEGRATED CIRCUIT (IC) FABRICATION, AND RELATED PROCESSES AND DEVICES
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Application No.: US14939561Application Date: 2015-11-12
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Publication No.: US20170140986A1Publication Date: 2017-05-18
- Inventor: Vladimir Machkaoutsan , Stanley Seungchul Song , John Jianhong Zhu , Junjing Bao , Jeffrey Junhao Xu , Mustafa Badaroglu , Matthew Michael Nowak , Choh Fei Yeap
- Applicant: QUALCOMM Incorporated
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L23/532 ; G06F17/50

Abstract:
Self-aligned metal cut and via for Back-End-Of-Line (BEOL) processes for semiconductor integrated circuit (IC) fabrication, and related processes and devices, is disclosed. In this manner, mask placement overlay requirements can be relaxed. This relaxation can be multiples of that allowed by conventional BEOL techniques. This is enabled through application of different fill materials for alternating lines in which a conductor will later be placed. With these different fill materials in place, a print cut and via mask is used, with the mask allowed to overlap other adjacent fill lines to that of the desired line. Etching is then applied that is selective to the desired line but not adjacent lines.
Public/Granted literature
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