Patent ID: 7378332
Filing Date: 2008-05-27
Classification: B24B,H01L

Abstract:
1. A manufacturing method of a bonding substrate, comprising: a bonding step for bonding an active layer wafer and a supporting substrate wafer in one on the other; a thermal processing step for enhancing a bonding strength of said bonding wafer fabricated in said bonding step; a surface grinding step for applying a surface grinding to the active layer wafer side of said bonding wafer to decrease a thickness of said active layer wafer so as to make it operative as an active layer; and a polishing step for polishing and removing said active layer between a peripheral edge of said active layer and a peripheral region of a bonding interface formed in said bonding step; wherein in said polishing step a polishing pressure applied onto the peripheral region of said active layer is controlled to be higher than that onto the central region thereof.