HYDROPHOBIC SILANE COATING FOR PREVENTING THE ADULT GROWTH OF ANODICALLY CONDUCTIVE FIBERS (CAF) INTO PCB

摘要

An improved substrate for manufacturing a printed circuit board (PCB) comprises a hydrophobic silane coating of a silane composition applied to a glass fiber substrate and mixed with a silane coupling agent. The silane coupling agent is applied to the surface of the substrate to bond the substrate to a paint coating. The application of the silane coupling agent to the surface of the substrate produces surface silanols which are involved in the growth of anodic conductive fibers (CAF). A silane composition which reacts with the surface silanols is applied to the surface of the substrate having the silane coupling agent applied thereon to form the hydrophobic silane coating. The surface represented by the hydrophobic silane coating / substrate is hydrophobic and largely silanol-free. This surface is then dried, and paint is applied to it. Then, the substrate, the hydrophobic silane coating, and the paint are exposed to curing conditions to define the PCB.