Patent ID: 6645346
Filing Date: 2003-11-11
Classification: H01L

Abstract:
A workpiece holding device used in a bonding apparatus that includes a heat block, a workpiece retainer for pressing a workpiece against said heat block, and a workpiece pressing means which is provided in said workpiece retainer and driven toward workpiece so as to be pressed against said workpiece, wherein said workpiece holding device is provided so that:before said workpiece is pressed by said workpiece retainer, an end portion of said workpiece pressing means which faces said workpiece protrudes further toward said workpiece than a retaining surface of said workpiece retainer, while said workpiece is being pressed by said workpiece pressing means, said workpiece pressing means undergoes elastic deformation and said end portion is pulled in a direction opposite from said workpiece so that said workpiece is pressed against said heat block by said retaining surface of said workpiece retainer, and while said workpiece is being conveyed, said retaining surface of said workpiece retainer is separated from said workpiece by a predetermined distance so that said workpiece pressing means undergoes elastic recovery, thus preventing said workpiece from contacting said workpiece retainer.