Invention Grant
- Patent Title: Image improvement for alignment through incoherent illumination blending
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Application No.: US16016162Application Date: 2018-06-22
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Publication No.: US10429744B2Publication Date: 2019-10-01
- Inventor: Tamer Coskun , Hwan J. Jeong
- Applicant: Applied Materials, Inc.
- Applicant Address: unknown Santa Clara
- Assignee: APPLIED MATERIALS, INC.
- Current Assignee: APPLIED MATERIALS, INC.
- Current Assignee Address: unknown Santa Clara
- Agency: Patterson + Sheridan LLP
- Main IPC: G03B27/32
- IPC: G03B27/32 ; G03B27/42 ; G03F7/20 ; G06T7/00 ; H04N5/235 ; G03F9/00

Abstract:
Methods and apparatuses are provided that determine an offset between actual feature/mark locations and the designed feature/mark locations in a maskless lithography system. For example, in one embodiment, a method is provided that includes opening a camera shutter in a maskless lithography system. Light is directed from a configuration of non-adjacent mirrors in a mirror array towards a first substrate layer. An image of the first substrate layer on a camera is captured and accumulated. Light is directed and images are captured repeatedly using different configurations of non-adjacent mirrors to cover an entire field-of-view (FOV) of the camera on the first substrate layer. Thereafter, the camera shutter is closed and the accumulated image is stored in memory.
Public/Granted literature
- US20180373161A1 IMAGE IMPROVEMENT FOR ALIGNMENT THROUGH INCOHERENT ILLUMINATION BLENDING Public/Granted day:2018-12-27
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