Patent ID: 6090688
Filing Date: 2000-07-18
Classification: H01L,Y10S

Abstract:
A method for fabricating an SOI substrate, comprising the steps of:(1) using a both-side polishing apparatus to polish both sides of a supporting substrate constituted by a first semiconductor wafer;(2) bonding an active substrate constituted by a second semiconductor wafer onto the supporting substrate being both-side polished to form an bonded-wafer;(3) removing an unbonded portion formed at the circumference of the bonded-wafer;(4) flat grinding the active substrate of the bonded-wafer which has the unbonded portion removed to reduce the thickness thereof;(5) etching the active substrate which has been flat ground by spin etching; and(6) processing the active substrate which has been etched by spin etching to be a thin film by PACE processing.