Patent ID: 11942336
Assignee: DOOSAN CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC C  H

Claim 0:
1. An underfill film for semiconductor packages, comprising:
a base; and
an adhesive layer disposed on one surface of the base, having a melt viscosity in a range of 300 to 1000 Pa·s at 150 to 160° C., and having an onset temperature of 145±5° C. on a differential scanning calorimeter (DSC),
wherein the adhesive layer is a cured product or a semi-cured product of an adhesive resin composition, the adhesive resin composition comprising:
(a) an epoxy resin containing a liquid epoxy resin, a phenoxy resin and a polyfunctional epoxy resin;
(b) an acid anhydride curing agent;
(c) a nitrogen (N)-containing heterocyclic compound; and
(d) a filler.