Invention Grant
- Patent Title: Two etch method for achieving a wafer thickness profile
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Application No.: US16003916Application Date: 2018-06-08
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Publication No.: US10553502B2Publication Date: 2020-02-04
- Inventor: Laura Mauer , John Taddei , John Clark , Elena Lawrence , Eric Kurt Zwirnmann , David A. Goldberg , Jonathan Yutkowitz
- Applicant: VEECO PRECISION SURFACE PROCESSING LLC
- Applicant Address: US PA Horsham
- Assignee: VEECO PRECISION SURFACE PROCESSING LLC
- Current Assignee: VEECO PRECISION SURFACE PROCESSING LLC
- Current Assignee Address: US PA Horsham
- Agency: Leason Ellis LLP
- Main IPC: H01L21/66
- IPC: H01L21/66 ; H01L21/306 ; H01L21/768 ; H01L21/02 ; H01L21/67

Abstract:
A system and method for performing a wet etching process is disclosed. The system includes multiple processing stations accessible by a transfer device, including a measuring station to optically measure the thickness of a wafer before and after each etching steps in the process. The system also includes a controller to analyze the thickness measurements in view of a target wafer profile and generate an etch recipe, dynamically and in real time, for each etching step. In addition, the process controller can cause a single wafer wet etching station to etch the wafer according to the generated etching recipes. In addition, the system can, based on the pre and post-etch thickness measurements and target etch profile, generate and/or refine the etch recipes.
Public/Granted literature
- US20180294196A1 SYSTEM AND METHOD FOR PERFORMING A WET ETCHING PROCESS Public/Granted day:2018-10-11
Information query
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