Patent ID: 7825009
Filing Date: 2010-11-02
Classification: B23K,H01L

Abstract:
1. A manufacturing method for devices formed in a plurality of partitioned regions defined by a plurality of crossing separation lines formed on the upper surface of a wafer having a thickness of less than or equal to 100 μm, wherein said wafer is being separated into said individual devices along said separation lines, said manufacturing method comprising: a wafer supporting step of mounting an adhesive film for die bonding to the lower surface of said wafer and attaching said wafer through said adhesive film to the upper surface of a dicing tape mounted on an annular frame; a laser processing step of applying a pulsed laser beam having an absorption wavelength to said wafer along said separation lines of said wafer after mounting said adhesive film to the dicing tape, separating said wafer into said individual devices and cutting said adhesive film; and a pickup step of expanding said dicing tape after performing said laser processing step to increase the spacing between any adjacent ones of said individual devices, and peeling off to pick up each of said individual devices from said dicing tape in the condition where said adhesive film is mounted on the lower surface of each device, wherein said laser processing step comprises the step of incompletely cutting said adhesive film with a part being left, and wherein said adhesive tape which is incompletely cut in said laser processing step is completely cut by expanding said dicing tape.