Invention Grant
- Patent Title: Pillar contact extension and method for producing the same
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Application No.: US15877044Application Date: 2018-01-22
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Publication No.: US10475990B2Publication Date: 2019-11-12
- Inventor: Curtis Chun-I Hsieh , Lup San Leong , Wanbing Yi , Cing Gie Lim , Yi Jiang , Juan Boon Tan
- Applicant: GLOBALFOUNDRIES Singapore Pte. Ltd.
- Applicant Address: SG Singapore
- Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
- Current Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
- Current Assignee Address: SG Singapore
- Agency: Ditthavong & Steiner P.C.
- Main IPC: H01L43/12
- IPC: H01L43/12 ; H01L43/02 ; H01L43/08 ; H01L27/22

Abstract:
Methods of forming a pillar contact extension within a memory device using a self-aligned planarization process rather than direct ILD CMP and the resulting devices are provided. Embodiments include forming a photoresist layer over a low-K layer formed over an ILD having a first metal layer in a memory region and in a logic region and pillar-shaped conductors formed atop of the first metal layer only in the memory region; forming a trench through the photoresist layer over each pillar-shaped conductor; extending the trench through the low-K layer to an upper surface of each pillar-shaped conductor; forming a second metal layer over the low-K layer, filling the trench entirely; and planarizing the second metal layer until the second metal layer is removed from over the logic region, a pillar contact extension formed atop of each pillar-shaped conductor.
Public/Granted literature
- US20190229261A1 PILLAR CONTACT EXTENSION AND METHOD FOR PRODUCING THE SAME Public/Granted day:2019-07-25
Information query
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