Patent ID: 7955661
Filing Date: 2011-06-07
Classification: D21H,H01F,H01L,H02K,H05K,Y10T

Abstract:
1. A method for the treatment of micro pores within a mica paper comprising: adding silane compounds to the mica paper such that the silane compounds travel within the micro pores of the mica paper, wherein the silane compounds have a molecular weight between approximately 15 and 300; compressing the mica paper to contact mica flakelet surfaces of the mica paper with one another; reacting the silane compounds with inner surfaces of the micro pores within the mica paper; after said reacting, impregnating the mica paper with a resin; wherein during said compressing, the mica paper is compressed by an amount between 5% and 30% of the original thickness of the mica paper prior to said compressing thereby yielding a desired degree of exposure of the contacted mica flakelet surfaces to the silane compounds with respect to a time necessary for the silane compounds to reach the micro pores of the mica paper for said reacting; and wherein during said impregnating, the resin binds to the inner surfaces of the micro pores with the mica paper through the silane compounds to increase adhesion of the impregnating resin to the mica paper and to reduce micro void formation in the impregnated mica paper.