Invention Grant
- Patent Title: Method of forming a metal-insulator-metal (MIM) capacitor
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Application No.: US17992142Application Date: 2022-11-22
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Publication No.: US11769722B2Publication Date: 2023-09-26
- Inventor: Yaojian Leng
- Applicant: Microchip Technology Incorporated
- Applicant Address: US AZ Chandler
- Assignee: Microchip Technology Incorporated
- Current Assignee: Microchip Technology Incorporated
- Current Assignee Address: US AZ Chandler
- Agency: SLAYDEN GRUBERT BEARD PLLC
- The original application number of the division: US16999358 2020.08.21
- Main IPC: H01L23/522
- IPC: H01L23/522 ; H01L49/02 ; H01L21/768 ; H01L23/00 ; H01L23/532

Abstract:
A method of forming a metal-insulator-metal (MIM) capacitor with copper top and bottom plates may begin with a copper interconnect layer (e.g., Cu MTOP) including a copper structure defining the capacitor bottom plate. A passivation region is formed over the bottom plate, and a wide top plate opening is etched in the passivation region, to expose the bottom plate. A dielectric layer is deposited into the top plate opening and onto the exposed bottom plate. Narrow via opening(s) are then etched in the passivation region. The wide top plate opening and narrow via opening(s) are concurrently filled with copper to define a copper top plate and copper via(s) in contact with the bottom plate. A first aluminum bond pad is formed on the copper top plate, and a second aluminum bond pad is formed in contact with the copper via(s) to provide a conductive coupling to the bottom plate.
Public/Granted literature
- US20230079474A1 METHOD OF FORMING A METAL-INSULATOR-METAL (MIM) CAPACITOR Public/Granted day:2023-03-16
Information query
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