Patent ID: 7602046
Filing Date: 2009-10-13
Classification: H01L

Abstract:
1. A recyclable donor wafer that includes a donor substrate and a formed layer thereon, wherein the formed layer has a thickness to provide (a) at least two useful layers for detachment therefrom and (b) additional material for removal to planarize exposed surfaces of the useful layers to sequentially prepare each layer for molecular bonding to a separate receiving substrate prior to detachment of the layer from the donor substrate, wherein the thickness of the formed layer allows the formed layer to be molecularly bonded to a first receiving substrate to allow the selective removal and transfer of a first useful layer thereto, while a second a second useful layer remains intact, and to allow the remaining portion of the formed layer to be subsequently bonded to a second receiving substrate to allow the selective removal and transfer of the second useful layer thereto without reforming the remaining portion of the formed layer.