Invention Grant
- Patent Title: Model-based hot spot monitoring
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Application No.: US15148116Application Date: 2016-05-06
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Publication No.: US10030965B2Publication Date: 2018-07-24
- Inventor: Stilian Ivanov Pandev , Sanjay Kapasi , Mark D. Smith , Ady Levy
- Applicant: KLA-Tencor Corporation
- Applicant Address: US CA Milpitas
- Assignee: KLA-Tencor Corporation
- Current Assignee: KLA-Tencor Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Spano Law Group
- Agent Joseph S. Spano
- Main IPC: G01B11/00
- IPC: G01B11/00 ; H01L21/66

Abstract:
Methods and systems for monitoring parameters characterizing a set of hot spot structures fabricated at different locations on a semiconductor wafer are presented herein. The hot spot structures are device structures that exhibit sensitivity to process variations and give rise to limitations on permissible process variations that must be enforced to prevent device failures and low yield. A trained hot spot measurement model is employed to receive measurement data generated by one or more metrology systems at one or more metrology targets and directly determine values of one or more hot spot parameters. The hot spot measurement model is trained to establish a functional relationship between one or more characteristics of a hot spot structure under consideration and corresponding measurement data associated with measurements of at least one metrology target on the same wafer. A fabrication process parameter is adjusted based on the value of a measured hot spot parameter.
Public/Granted literature
- US20160327605A1 Model-Based Hot Spot Monitoring Public/Granted day:2016-11-10
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