Patent ID: 7022546
Filing Date: 2006-04-04
Classification: B81C,H01L

Abstract:
1. A method for protecting a MEMS wafer during a dicing, comprising: (a) mounting, upon a backside of the MEMS wafer, a layer of dicing tape, the MEMS wafer having a plurality of MEMS structure sites on a front side and a plurality of through holes, each through hole corresponding to a MEMS structure site, the through holes being formed such that each through hole penetrates through the wafer from the backside of the wafer to the front side; (b) mounting, upon the front side of the MEMS wafer, prior to dicing, a wafer cap to produce a laminated MEMS wafer, the wafer cap having a first side and a second side, the first side being opposite of the second side, the first side of the wafer cap being recessed in areas corresponding to locations of the MEMS structure sites on the MEMS wafer, the second side of the wafer being substantially planar; (c) dicing the MEMS wafer into a plurality of dies such that each die includes a MEMS structure site and a corresponding through hole; and (d) mounting, upon the dicing tape, a layer of transfer tape.