Invention Grant
- Patent Title: Printed circuit board and methods to enhance reliability
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Application No.: US15351066Application Date: 2016-11-14
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Publication No.: US10172243B2Publication Date: 2019-01-01
- Inventor: Bruce J. Chamberlin , Scott B. King , Joseph Kuczynski , David J. Russell
- 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
- Agency: Patterson + Sheridan, LLP
- Main IPC: H05K3/00
- IPC: H05K3/00 ; H05K3/40 ; H05K3/22 ; H05K3/46 ; H05K1/11 ; H05K1/09

Abstract:
In some embodiments, methods include drilling one or a plurality of PTHs with any industrial grade drill to fabricate holes with positive etch back, flooding the PTHs with a dilute solution of an acrylate monomer/oligomer containing an appropriate level of peroxide initiator, polymerizing the acrylate, and then rising the PTHs with the solvent used in the formulation of the acrylate material. In one embodiment, the printed circuit board may include a substrate comprising a plurality of metal layers separated by a plurality of insulating layers; a plurality of plated through holes formed in the substrate, each plated through hole comprising: recesses formed at each insulating layer, copper lands between the recesses, a polymer coating in each recess, and a metal layer lining the plated through hole.
Public/Granted literature
- US20180139852A1 PRINTED CIRCUIT BOARD AND METHODS TO ENHANCE RELIABILITY Public/Granted day:2018-05-17
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