abstract |
The present invention provides an underfill film for underfill which does not impair flexibility and increases the glass transition temperature. The present invention relates to an underfill film for underfill comprising a resin component containing an epoxy resin having a number average molecular weight of 600 or less, a phenol resin having a number average molecular weight of more than 500, and an elastomer, and the epoxy resin in the above resin component The content of the resin is 5 to 50% by weight, and the content of the above phenol resin is 5 to 50% by weight. |