The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1998
Filed:
Oct. 19, 1995
Filip Christiaens, Bornem, BE;
Luc Tielemans, Simmerath, DE;
Luc De Schepper, Hasselt, BE;
Eric Beyne, Heverlee, BE;
Interuniversitair Micro-Elektronica Centrum VZW, Louvain, BE;
Abstract
A system for evaluating the thermal impedance of packaged semiconductor chips. The measuring apparatus includes a thermostatic bath filled with a dielectric liquid and a temperature sensor for measuring the temperature of the bath. The semiconductor chip is subjected to a calibration step followed by a thermal response measurement step. Increasing the power pulse length allows measurement of the steady-state junction-to-case thermal resistance. The measuring apparatus and method is further used for tracing in-situ degradation of packaged semiconductor chips due to power cycling.