Automation system and a method for assembling a workpiece

摘要

Disclosed is an automation system and a method for assembling a workpiece. The system includes a first stocker having a plurality of first substrates with a plurality of grades of defects, and a second stocker having a plurality of second substrates to be paired with one of the first substrates, and having a plurality of grades of defects. The second stocker receives the grade of the first substrate and selects the second substrate with a grade corresponding to the grade of the received first substrate. The workpiece is assembled by receiving one of the first substrates and determining the grade of the received first substrate. The grades of the second substrates in a cassette is surveyed and determined if there is a second substrate with the same grade as the received first substrate. One of the second substrates is selected if it is determined that there is a second substrate with a grade corresponding to that of the received first substrate. The selected second substrate is placed in a new cassette. The first substrate and the second substrate are simultaneously supplied to respective production lines. If it is determined that there are no second substrates with the same grade as the received first substrate, the first substrate is held on stand-by.