Invention Grant
- Patent Title: Hybrid imaging and scatterometry targets
- Patent Title (中): 混合成像和散射目标
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Application No.: US14338023Application Date: 2014-07-22
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Publication No.: US09476838B2Publication Date: 2016-10-25
- Inventor: DongSub Choi , Tal Itzkovich , David Tien
- 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: Simpson & Simpson, PLLC
- Main IPC: G01N21/00
- IPC: G01N21/00 ; G01N21/95 ; G01N21/93 ; G01N21/956 ; G03F7/20

Abstract:
Metrology targets, design files, and design and production methods thereof are provided. The metrology targets are hybrid in that they comprise at least one imaging target structure configured to be measurable by imaging and at least one scatterometry target structure configured to be measurable by scatterometry. Thus, the hybrid targets may be measured by imaging and scatterometry simultaneously or alternatingly and/or the measurement techniques may be optimized with respect to wafer regions and other spatial parameters, as well as with respect to temporal process parameters. The hybrid targets may be used to monitor process parameters, for example via comparative overlay measurements and/or high resolution measurements.
Public/Granted literature
- US20140375984A1 HYBRID IMAGING AND SCATTEROMETRY TARGETS Public/Granted day:2014-12-25
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