Invention Grant
- Patent Title: Multi-pin-wafer-level-chip-scale-packaging solution for high power semiconductor devices
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Application No.: US16995697Application Date: 2020-08-17
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Publication No.: US11495567B2Publication Date: 2022-11-08
- Inventor: Habeeb Mohiuddin Mohammed , Rajesh Subraya Aiyandra
- Applicant: Dialog Semiconductor (UK) Limited
- Applicant Address: GB London
- Assignee: Dialog Semiconductor (UK) Limited
- Current Assignee: Dialog Semiconductor (UK) Limited
- Current Assignee Address: GB London
- Agency: Saite Ackerman LLC
- Agent Stephen B. Ackerman; Rosemary L. S. Pike
- Main IPC: H01L23/31
- IPC: H01L23/31 ; H01L23/00

Abstract:
A multi-pin wafer level chip scale package is achieved. One or more solder pillars and one or more solder blocks are formed on a silicon wafer wherein the one or more solder pillars and the one or more solder blocks all have a top surface in a same horizontal plane. A pillar metal layer underlies the one or more solder pillars and electrically contacts the one or more solder pillars with the silicon wafer through an opening in a polymer layer over a passivation layer. A block metal layer underlies the one or more solder blocks and electrically contacts the one or more solder pillars with the silicon wafer through a plurality of via openings through the polymer layer over the passivation layer wherein the block metal layer is thicker than the pillar metal layer.
Information query
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