Use Of 3 Thermocouples To Verify A Printed Circuit Board Profile During The Reflow Operation…

This paper presents the results of an initial study to determine if the use of only 3 thermocouples can be utilized to verify a PCB’s profile during the reflow operation. In so doing, a thermal recorder, with the capability to measure up to 20 channels was used to thoroughly map a Test Vehicle. Three of the 20 were used to record the temperatures on the leading-edge of the PCB laminate, the other seventeen were distributed around the PCB in both critical and non-critical locations. Two techniques were conducted: a “characterization” technique and a “verification” technique.