Patent ID: 8841203
Filing Date: 2014-09-23
Classification: H01L

Abstract:
1. A method for forming two device wafers using a single base substrate, said method comprising: providing a base substrate of unitary construction and of uniform material composition, wherein said uniform material composition is selected from the group consisting of a ceramic, a glass and a semiconductor material; depositing a first device layer directly on a topmost surface of the base substrate and a second device layer directly on a bottommost surface of the base substrate, wherein said first and second device layers each comprise a semiconductor material; and spalling the base substrate at room temperature or a temperature below room temperature and in a region of said base substrate and between the first and second device layers, wherein said spalling provides a first device wafer including a portion of the base substrate and the first device layer, and a second device wafer including another portion of the base substrate and the second device layer.