Invention Grant
- Patent Title: Implementing backdrilling elimination utilizing anti-electroplate coating
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Application No.: US15821042Application Date: 2017-11-22
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Publication No.: US10798829B2Publication Date: 2020-10-06
- Inventor: Matthew S. Doyle , Joseph Kuczynski , Phillip V. Mann , Kevin M. O'Connell
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Nathan M. Rau
- Main IPC: H05K1/02
- IPC: H05K1/02 ; H05K1/11 ; H05K3/00 ; H05K3/40 ; H05K3/42 ; H01L21/311 ; H01L23/48 ; H05K1/03

Abstract:
A method and structure are provided for implementing enhanced via creation without creating a via barrel stub. The need to backdrill vias during printed circuit board (PCB) manufacturing is eliminated. After the vias have been drilled, but before plating, a plug is inserted into each via and the plug is lowered to a depth just below a desired signal trace layer. A thin anti-electroplate coating is applied onto the walls of the via below the signal trace. Then the plugs are removed and a standard board plating process for the PCB is performed.
Public/Granted literature
- US20180098438A1 IMPLEMENTING BACKDRILLING ELIMINATION UTILIZING ANTI-ELECTROPLATE COATING Public/Granted day:2018-04-05
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