公开(公告)号：US20200172724A1

公开(公告)日：2020-06-04

申请号：US16610992

申请日：2018-05-30

Applicant: NAGASE CHEMTEX CORPORATION

Inventor： Yasuhito FUJII ,  Katsushi KAN ,  Yosuke OI

IPC: C08L63/04 ,  C08K3/36 ,  C08K7/26 ,  B29C43/00

Abstract: To provide an epoxy resin composition capable of forming a polished surface with high flatness when polished after curing, and a method for producing an electronic component mounting structure having a polished surface with high flatness, the polished surface obtained by polishing the surface of an encapsulation body. Disclosed are an epoxy resin composition, an electronic component mounting structure including the epoxy resin composition, and a method for producing the electronic component mounting structure, wherein: the epoxy resin composition includes a fused silica possibly containing hollow particles, and a curing agent; on a polished surface obtained by polishing a cured product of the epoxy resin composition, the number of pores having a diameter of more than 5 μm observed within a 25-mm2 area is one or less, the pores derived from cross sections of the hollow particles; and the polished surface is coated with a coating material.