Patent ID: 8300923

Claim:
A process control method for a surface mount line including a solder printer configured to print solder on a surface of a substrate, a solder print inspector configured to inspect the printed solder and outputting printing quality data, a mounter configured to mount components on the substrate with the solder printed, a mount inspector configured to inspect a state of the mounted components and outputting mounting quality data, a reflow furnace configured to heat the solder to solder the components to the substrate, and a soldering inspector configured to inspect a state of the soldering and outputting soldering pass/fail data, the process control method comprising: retrieving the printing quality data, the mounting quality data, and the soldering pass/fail data from a primary recorder with the printing quality data, the mounting quality data, and the soldering pass/fail data recorded therein, recording the printing quality data, the mounting quality data, and the soldering pass/fail data for each of the components in a secondary recorder; and determining whether the solder printer and the mounter need adjustment by using the data of the components, which are associated with the soldering pass/fail data recorded in the secondary recorder by a computer, wherein the determining includes; defining an upper control bound and a lower control bound for each type of the components by using the data of the components with the soldering pass/fail data indicating conforming; and determining whether the solder printer needs adjustment by using the upper control bound and the lower control bound.