Patent ID: 6638791
Filing Date: 2003-10-28
Classification: B28D,H01L

Abstract:
A method of separating a substrate into a plurality of integrated circuit chips, said substrate and said plurality of integrated circuit chips having a first side that is smoother than a second side, each of said plurality of integrated circuit chips including a ball grid array of contacts at said second side, said method comprising:providing a vacuum retainer plate having a plurality of vacuum pedestals, each of said vacuum pedestals corresponding to individual ones of said plurality of integrated circuit chips, each of said vacuum pedestals having an upper surface; disposing said first side of said substrate on said upper surface of said vacuum pedestals; holding said first side of said substrate against said upper surface of said vacuum pedestal with a vacuum; and dicing said substrate into the plurality of integrated circuit chips while said substrate is held against said upper surfaces of said vacuum pedestals.