Invention Grant
- Patent Title: Epitaxially coated silicon wafer and method for producing epitaxially coated silicon wafer
- Patent Title (中): 外延涂覆的硅片及其制造外延涂覆硅片的方法
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Application No.: US11517620Application Date: 2006-09-08
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Publication No.: US07659207B2Publication Date: 2010-02-09
- Inventor: Reinhard Schauer , Thorsten Schneppensieper
- Applicant: Reinhard Schauer , Thorsten Schneppensieper
- Applicant Address: DE Munich
- Assignee: Siltronic AG
- Current Assignee: Siltronic AG
- Current Assignee Address: DE Munich
- Agency: Brooks Kushman P.C.
- Priority: DE102005045337 20050922
- Main IPC: H01L21/311
- IPC: H01L21/311

Abstract:
Epitaxially coated silicon wafers, are coated individually in an epitaxy reactor by placing a wafer on a susceptor, pretreating under a hydrogen atmosphere, in and then with addition of an etching medium, and coating epitaxially on a polished front side, wherein an etching treatment of the susceptor is effected after a specific number of epitaxial coatings, and the susceptor is then hydrophilized. Silicon wafer produced thereby have a maximum local flatness value SFQRmax of 0.01 μm to 0.035 μm relative to at least 99% of the partial regions of an area grid of measurement windows having a size of 26×8 mm2 on the front side of the silicon wafer with an edge exclusion of 2 mm.
Public/Granted literature
- US20070066082A1 Epitaxially coated silicon wafer and method for producing epitaxially coated silicon wafer Public/Granted day:2007-03-22
Information query
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