Invention Grant
- Patent Title: Methods for preparing a bonding surface of a semiconductor wafer
- Patent Title (中): 制备半导体晶片的接合表面的方法
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Application No.: US11472665Application Date: 2006-06-21
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Publication No.: US07645392B2Publication Date: 2010-01-12
- Inventor: Corinne Maunand Tussot , Christophe Maleville , Hubert Moriceau , Alain Soubie
- Applicant: Corinne Maunand Tussot , Christophe Maleville , Hubert Moriceau , Alain Soubie
- Applicant Address: FR Bernin FR Paris
- Assignee: S.O.I.Tec Silicon on Insulator Technologies,Commissariat a l'Energie Atomique (CEA)
- Current Assignee: S.O.I.Tec Silicon on Insulator Technologies,Commissariat a l'Energie Atomique (CEA)
- Current Assignee Address: FR Bernin FR Paris
- Agency: Winston & Strawn LLP
- Priority: FR0403273 20040330
- Main IPC: B44C1/22
- IPC: B44C1/22

Abstract:
A method for preparing an oxidized surface of a first wafer for bonding with a second wafer. The method includes treating the oxidized surface with a solution of NH4OH/H2O2 at treatment parameters sufficient to etch about 10 Å to about 120 Å from the wafer surface, followed by treating the etched surface with hydrochloric acid species at a temperature below about 50° C. for a duration of less than about 10 minutes to remove isolated particles from the oxidized surface. This method cleans the wafer surface without increasing roughness or creating rough patches thereon, and thus provides a cleaned surface capable of providing an increased bonding energy between the first and second wafers when those surfaces are bonded together. This cleaning process is advantageously used in a thin layer removal process to fabricate a semiconductor on insulator structure.
Public/Granted literature
- US20060273068A1 Methods for preparing a bonding surface of a semiconductor wafer Public/Granted day:2006-12-07
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