US Patent No. 10,462,900


Patent No. 10,462,900
Issue Date October 29, 2019
Title Glass Fiber Coatings For Improved Resistance To Conductive Anodic Filament Formation
Inventorship Bruce J. Chamberlin, Vestal, NY (US)
Matthew S. Kelly, Oakville (CA)
Scott B. King, Rochester, MN (US)
Joseph Kuczynski, North Port, FL (US)
Assignee International Business Machines Corporation, Armonk, NY (US)

Claim of US Patent No. 10,462,900

1. A process of improving resistance to conductive anodic filament (CAF) formation, the process comprising:dissolving a base resin material, a lubricant material, and a coupling agent in a solvent to form a functionalized sizing agent solution, the base resin material including one or more peroxide initiators;
applying the functionalized sizing agent solution to individual glass fibers following a glass fiber formation process; and
removing the solvent via a thermal process that partially converts the base resin material, resulting in formation of coated glass fibers having a flowable resin coating that is compatible with a pre-impregnated (prepreg) matrix material, the prepreg matrix material including a polyphenylene oxide (PPO)-based matrix material;
forming a prepreg material; and
incorporating the prepreg material into the manufacturing of a printed circuit board,
wherein, during one or more printed circuit board manufacturing operations, the flowable resin coating flows to fill voids between the individual glass fibers that represent conductive anodic filament (CAF) formation pathways.