Patent ID: 6718227
Filing Date: 2004-04-06
Classification: G03F,H01L

Abstract:
A method of handling a semiconductor wafer including a plurality of integrated circuits, each of said integrated circuits having one or more reference marks, comprising the steps of:moving the wafer to a first position so that the wafer handling device may operate on a first integrated circuit of said plurality of integrated circuits; capturing an image of a first reference mark on said first integrated circuit; correcting a first position error according to the captured image of the first reference mark; operating on the first integrated circuit in response to correcting the first position error; moving the wafer to a second position so that the wafer handling device may operate on a second integrated circuit of said plurality of integrated circuits; capturing an image of a second reference mark on said second integrated circuit; correcting a second position error according to the captured image of the second reference mark; operating on the second integrated circuit in response to correcting the second position error; and repeating said steps of moving, capturing, correcting, and operating for each integrated circuit in said plurality of integrated circuits.