Patent ID: 8574960

Claim:
A method of making a semiconductor device, comprising: providing a semiconductor wafer including a plurality of first semiconductor die with a stress sensitive region; forming a masking layer over the stress sensitive region and terminating at a boundary of the stress sensitive region; depositing an underfill material over the semiconductor wafer and extending to the masking layer at the boundary of the stress sensitive region, the masking layer preventing formation of the underfill material over the stress sensitive region; removing the masking layer leaving a cavity in the underfill material terminating at the boundary of the stress sensitive region; singulating the semiconductor wafer into the first semiconductor die; providing a second semiconductor die including a plurality of bumps formed over a surface of the second semiconductor die; and disposing the first semiconductor die over the second semiconductor die by pressing the bumps into the underfill material with the cavity separating the stress sensitive region and second semiconductor die.