Patent ID: 6677249
Filing Date: 2004-01-13
Classification: H01L,Y10S

Abstract:
A method for removing an epitaxial layer from a first substrate and subsequently applying the epitaxial layer onto a second substrate, the method comprising the steps of:producing a porous breakaway layer by performing an anodization procedure in a hydrofluoric acid; removing an oxide layer of the porous breakaway layer that supports the epitaxial layer by contacting the porous breakaway layer with the hydrofluoric acid for a time period without removing the entire porous breakaway layer; applying the epitaxial layer onto the porous breakaway layer subsequently to the oxide layer removing step, the epitaxial layer being disposed on the first substrate; removing the epitaxial layer from the first substrate at least one of: chemically by one of KOH, NaOH, NH3 and mixtures of hydrofluoric acid and an oxidant, by ultrasound, and electrochemically, prior to contact with the second substrate; and applying the epitaxial layer onto the second substrate after the epitaxial layer is removed from the first substrate.