Patent ID: 7549794
Filing Date: 2009-06-23
Classification: C21D

Abstract:
1. An in-reflow-furnace temperature measuring method in which first and second pseudo circuit boards having the substantially same configuration and dimensions as those of a circuit board are inserted into a reflow furnace for soldering an electronic part onto the circuit board, the surface temperatures of the first and second pseudo circuit boards and air temperatures around the first and second pseudo circuit boards within the reflow furnace are measured comprising steps of; black-coating the entire surface of a metal whose physical value is known in the first pseudo circuit board; mirror-finishing the entire surface of a metal whose given physical value is known in the second pseudo circuit board; conveying the first and second pseudo circuit boards within the reflow furnace at the substantially same speed as the conveying speed of the circuit board within the reflow furnace; and measuring the surface temperatures at given positions in the first and second pseudo circuit boards within the reflow furnace and air temperatures around the first and second pseudo circuit boards.