Patent ID: 9059073
Filing Date: 2015-06-16
Classification: H01L,Y02E

Abstract:
1. A method of removing a semiconductor device layer from a base substrate, said method comprising: providing a sacrificial structure on an upper surface of a base substrate, said sacrificial structure comprising, from bottom to top, a first confinement layer, a crack propagation layer, and a second confinement layer; providing a semiconductor device layer including at least one semiconductor device on the second confinement layer of the sacrificial structure, wherein said at least one semiconductor device is provided on said semiconductor device layer prior to said providing said semiconductor device layer on said second confinement layer; depositing a metal-containing adhesion layer on an upper surface of the semiconductor device layer; forming a stressor layer containing a metal on an upper surface of the metal-containing adhesion layer; applying a plastic sheet atop the stressor layer; etching end portions of the crack propagation layer to initiate a crack in the crack propagation layer of the sacrificial structure; cleaving the etched crack propagation layer to provide a cleaved crack propagation layer portion to a surface of the second confinement layer that is located on a surface of the semiconductor device layer and another cleaved crack propagation layer portion to a surface of the first confinement layer that is located on the upper surface of the base substrate; removing the cleaved crack propagation layer portion from the surface second confinement layer that is located on the surface of the semiconductor device layer and the another cleaved crack propagation layer portion from the surface of the first confinement layer that is located on the upper surface of the base substrate; removing the first confinement layer from the upper surface of the base substrate and removing the second confinement layer from the surface of the semiconductor device layer; and removing said stressor layer and said plastic sheet from atop said semiconductor device layer after said cleaving.