Patent ID: 7514291
Filing Date: 2009-04-07
Classification: B23K,B28D,H01L

Abstract:
1. A method for singulating at least one semiconductor die from a semiconductor wafer, the method comprising: forming at least one channel in a semiconductor wafer body having an active surface and an opposing, bottom surface, the at least one channel being formed in the active surface thereof in alignment with a plurality of streets on the active surface circumscribing a location of at least one semiconductor die; depositing a dielectric material over at least a portion of the active surface of the semiconductor wafer body, substantially filling the at least one channel with the dielectric material and leaving at least one contact location on the active surface exposed through the dielectric material; cutting through the semiconductor wafer body between the active surface thereof and the bottom surface thereof substantially along a center of the at least one channel and through the dielectric material therein with at least one laser beam having a beam width narrower than a width of the at least one channel to leave portions of the dielectric material covering sidewalls of the at least one channel after cutting through the semiconductor wafer body is complete; and forming a discrete conductive element on the at least one contact location.