Patent ID: 8132707
Filing Date: 2012-03-13
Classification: B23K,H05K

Abstract:
1. A flow soldering apparatus comprising: a conveyor for conveying a substrate in which a plurality of through holes are formed; a dispenser for applying flux to the substrate; a soldering unit for applying molten solder to the substrate to which the flux has been applied; a preheating device for preheating the substrate by the time the substrate is conveyed to the soldering unit; a water content sensor for measuring a residual water content of a surface of the substrate; and a monitoring device for judging soldering quality by using a residual water content value of the surface of the substrate acquired from measuring the residual water content of the surface of the substrate with the water content sensor, on the basis of a correlation between a residual water content value of a surface of a sample substrate and a residual water content value of through holes of the sample substrate.