Patent ID: 6355298
Filing Date: 2002-03-12
Classification: B23K

Abstract:
A method for placing two elements on a surface, comprising the steps of:positioning a first transferring device relative to said surface so that a first recognizing means disposed on said first transferring device detects a first alignment mark on said surface; positioning a second transferring device relative to said surface so that a second recognizing means disposed on said second transferring device detects a second alignment mark on said surface; aligning one of said transferring devices and said surface relative to one another in accordance with the positions of the first and second alignment marks as detected by said first and second recognizing means, respectively; placing one of said two elements on said surface by means of the aligned transferring device; aligning the other of said transferring devices and said surface relative to one another in accordance with the positions of the first and second alignment marks as detected by said first and second recognizing means, respectively; and placing the other of said two elements on said surface by means of the aligned other transferring device.