Patent ID: 9153515
Filing Date: 2015-10-06
Classification: B02C,C08G,C08J,C08K,C08L,H01L

Abstract:
1. A method for producing a semiconductor encapsulating resin composition, comprising: pulverizing a composition containing a powder material of a curable resin and a powder material of an inorganic filler material by swirling the composition in a chamber with a swirl stream of a gas using a gas stream type pulverizing apparatus, wherein a pressure of the gas supplied into the chamber is equal to or more than 0.3 MPa, a temperature of the gas supplied into the chamber is equal to or less than 20° C., and a humidity of the gas supplied into the chamber is equal to or less than 40% RH, wherein particles of the composition thus pulverized in the pulverizing process have a particle size distribution which includes a first group having a particle size of 250 μm or more, a second group having a particle size of 150 μn or more but less than 250 μm, and a third group having a particle size of less than 150 μm, and wherein amounts of the first, second and third groups with respect to the amount of the whole of the pulverized composition are 1 wt % or less, 9 wt % or less, and 90 wt % or more, respectively.