Patent ID: 9351405
Filing Date: 2016-05-24
CPC Classification: D06M,H05K,Y10T

Claim Text:
1. A method of making an enhanced substrate for a printed circuit board, comprising the steps of: providing a substrate that includes glass fiber; applying a silane coupling agent to the surface of the substrate, wherein the silane coupling agent includes an organofunctional group to bind to a varnish coating and a hydrolyzable group that binds to the surface of the substrate for coupling the substrate to the varnish coating, and wherein the surface of the substrate having the silane coupling agent applied thereto includes one or more surface silanols; and applying a silane composition comprising a silane selected from a group consisting of chlorotrimethylsilane, hexamethyldisilazane, perfluorooctyl-1H,1H,2H,2H dimethylchlorosilane, (3,3,3-trifluoropropyl)dimethyl-chlorosilane, and combinations thereof, to the surface of the substrate having the silane coupling agent applied thereto to form a hydrophobic silane coating a monolayer thick that is an intermixed layer of the silane composition and the silane coupling agent, wherein the silane composition reacts with the one or more surface silanols, and wherein the hydrophobic silane coating presents a surface that is hydrophobic and essentially silanol-free.