Patent ID: 6071009
Filing Date: 2000-06-06
Classification: G01K,G01R

Abstract:
An apparatus for measuring temperatures on a semiconductor die having an active surface having at least one bond pad thereon having one end of a wire bonded thereto in a wire bonding operation and forming correlations of measured temperatures with locations on said active surface of said semiconductor die at a time of the measurement of said temperatures subsequent to the bonding of an end of a wire to said at least one bond pad on said active surface of said semiconductor die, said apparatus comprising:a wire bonding machine having a bonding arm and an ultrasonic bonding generator controller;a sensor probe mount attached to said bonding arm of said wire bonding machine;a decay temperature sensor probe having a fiber optic conductor with a sensing tip and an opposite signal output end, said probe mountable in said sensor probe mount attached to said bonding arm of said wire bonding machine;light pulse generating apparatus connected to said signal output end for generating a pulse of light through said fiber optic conductor to material at said sensing tip and receiving from said signal output end a decaying signal representative of a temperature at said sensing tip;a signal isolation trigger circuit connected to said wire bonding machine for initiating the generation of said light pulse, said signal isolation trigger circuit initiating a signal for a temperature measurement upon receiving an electrical voltage signal comprising an output signal of said ultrasonic bonding generator controller of said wire bonding machine;calculating apparatus for calculating a temperature indication from said decaying signal;stage apparatus for mounting said semiconductor die thereon attached to a portion of said wire bonding machine;control apparatus for manipulating a position of said stage relative to the sensor tip; andcomputing apparatus having software for receiving said temperature indication, and correlating and storing said temperature indication in machine-readable form as a function of one of time and location on said active surface of said semiconductor die subsequent to the bonding of one end of a wire to said at least one bond pad on the active surface of said semiconductor die.