Inventors:
Michael Gaynes - Vestal NY, US
Michael S. Gordon - Yorktown Heights NY, US
Nancy C. LaBianca - Carmel CT, US
Kenneth F. Latzko - Carmel NY, US
Aparna Prabhakar - North White Plains NY, US
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G01R 31/26, G01R 31/00, H01L 21/00, H01L 21/44, H01L 23/58, H01L 23/552
US Classification:
438 17, 438 26, 438108, 438613, 257 48, 257660, 257737, 257778, 257E21503, 257E21529, 257E23021, 257E23115, 324501, 32476202
Abstract:
A method for detecting soft errors in an integrated circuit (IC) due to transient-particle emission, the IC comprising at least one chip and a substrate includes mixing an epoxy with a radioactive source to form a hot underfill (HUF); underfilling the chip with the HUF; sealing the underfilled chip; measuring a radioactivity of the HUF at an edge of the chip; measuring the radioactivity of the HUF on a test coupon; testing the IC for soft errors by determining a current radioactivity of the HUF at the time of testing based on the measured radioactivity; and after the expiration of a radioactive decay period of the radioactive source, using the IC in a computing device by a user.