Patent ID: 7585750
Filing Date: 2009-09-08
Classification: H01L

Abstract:
1. A method of forming through-hole vias in a semiconductor wafer, comprising: forming a semiconductor wafer having a plurality of die with contact pads disposed on a surface of each die, the semiconductor wafer having saw street guides between each die; forming a trench in the saw street guides without using support material to support the semiconductor wafer, the trench extending partially but not completely through the semiconductor wafer, the uncut portion of the saw street guides below the trench along a backside of the semiconductor wafer being more than 60% of a thickness of the semiconductor wafer to maintain structural support for the semiconductor wafer without the support material during the processing steps of: removing the uncut portion of the saw street guide below the trench along the backside of the semiconductor wafer portion; applying dicing tape to the backside of the semiconductor wafer; cutting through the metal vias to the dicing tape; and singulating the semiconductor wafer along the saw street guides by removing the dicing tape to separate the die into individual units.