Invention Grant
- Patent Title: Substrate bonding pad having a multi-surface trace interface
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Application No.: US17343069Application Date: 2021-06-09
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Publication No.: US11569155B2Publication Date: 2023-01-31
- Inventor: Chih-Chin Liao , Cheng-Hsiung Yang
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA San Jose
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Morgan, Lewis & Bockius LLP
- Main IPC: H05K1/11
- IPC: H05K1/11 ; H01L23/498

Abstract:
A bonding pad such as for a ball grid array includes a conductive pad having a top surface and a first interface surface in contact with a signal trace of a substrate, and a plating layer having a bottom surface in direct contact with the top surface of the conductive pad. The plating layer includes one or more protrusions extending toward the signal trace in a direction generally parallel to a longitudinal axis of the signal trace. Each of the one or more protrusions includes two parallel sidewalls extending upwardly from the bottom surface of the plating layer, and a second interface surface contiguous with the bottom surface of the plating layer. The second interface surface is positioned over and in direct contact with a top surface of the signal trace. The protrusions prevent the connection to the signal trace from being compromised.
Public/Granted literature
- US20220399258A1 Substrate Bonding Pad Having a Multi-Surface Trace Interface Public/Granted day:2022-12-15
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