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Packaged die heater

United States Patent

June 21, 2011
View the Complete Patent at the US Patent & Trademark Office
A heater for heating packaged die for burn-in and heat testing is described. The heater may be a ceramic-type heater with a metal filament. The heater may be incorporated into the integrated circuit package as an additional ceramic layer of the package, or may be an external heater placed in contact with the package to heat the die. Many different types of integrated circuit packages may be accommodated. The method provides increased energy efficiency for heating the die while reducing temperature stresses on testing equipment. The method allows the use of multiple heaters to heat die to different temperatures. Faulty die may be heated to weaken die attach material to facilitate removal of the die. The heater filament or a separate temperature thermistor located in the package may be used to accurately measure die temperature.
Spielberger; Richard (Maple Grove, MN), Ohme; Bruce Walker (Minneapolis, MN), Jensen; Ronald J. (Bloomington, MN)
Honeywell International Inc. (Morristown, NJ)
12/ 172,317
July 14, 2008
GOVERNMENT RIGHTS The United States Government may have acquired certain rights in this invention pursuant to Contract No. DE-FC26-06NT42947 with the U.S. Dept. of Energy, National Energy Technology Laboratory.