Patent ID: 8535782
Filing Date: 2013-09-17
Classification: H05K,Y10T

Abstract:
1. A resin sheet for a circuit board comprising a resin layer and a passivation layer laminated on one surface of said resin layer, wherein said resin sheet has a rectangular shape in a plan view and the periphery of said passivation layer extends outward from the periphery of said resin layer; said resin layer comprises a flat section and a bank positioned outside of the flat section; the thickness of the top of said bank is larger than the thickness of the flat section and said bank has a slope section where the thickness of said resin layer gradually reduces toward the outside from the top of said bank; a difference between the resin thickness (d) of the top of said bank and an average thickness (D) of said flat section is 5% or less of said average thickness (D); and said resin layer contains an epoxy resin.