Patent ID: 8319350
Filing Date: 2012-11-27
Classification: C08G,C08L,C09J,H01L,Y10T

Abstract:
1. An adhesive tape for electrically connecting semiconductor chips in a chip-on-chip type semiconductor device, comprising: (A) 10 to 50 wt % of film forming resin; (B) 30 to 80 wt % of curable resin; and (C) 1 to 20 wt % of curing agent, wherein in the case where a tin-containing solder ball having the diameter of 500 μm is provided on the adhesive tape and heated at a temperature which is 30° C. higher than the melting point of the solder ball for 20 seconds, the solder wet-spreading ratio represented by the following formula (I) is 40% or higher: in the case where the solder wet-spreading ratio is 60% or higher, the adhesive tape comprises aliphatic dicarboxylic acid as (C) the curing agent, in the case where the solder wet-spreading ratio is 40% to 60%, the adhesive tape comprises the compound having a carboxyl group and a phenolic hydroxyl group as (C) the curing agent, and the solder material used in the measurement of the solder wet-spreading ratio is Sn/Ag/Cu=96.5/3.0/0.5.