Invention Grant
US07697724B1 Displacement determination system and method using separated imaging areas
有权
位移测定系统和使用分离成像区域的方法
- Patent Title: Displacement determination system and method using separated imaging areas
- Patent Title (中): 位移测定系统和使用分离成像区域的方法
-
Application No.: US11438843Application Date: 2006-05-23
-
Publication No.: US07697724B1Publication Date: 2010-04-13
- Inventor: Jun Gao , Carl E. Picciotto , Ross R. Allen
- Applicant: Jun Gao , Carl E. Picciotto , Ross R. Allen
- Applicant Address: US TX Houston
- Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee: Hewlett-Packard Development Company, L.P.
- Current Assignee Address: US TX Houston
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G01N21/86

Abstract:
A system including a data acquisition system and a processing system is provided. The data acquisition system is configured to capture a first reference frame that includes a first feature in a first imaging area on a substrate prior to a relative position between the data acquisition system and the substrate being adjusted by approximately a predetermined distance during a first time period, capture a first comparison frame that includes the first feature in a second imaging area on the substrate and a second reference frame that includes a second feature in the first imaging area on the substrate subsequent to the first time period, and capture a second comparison frame that includes the second feature in the second imaging area on the substrate subsequent to the relative position being adjusted by approximately the predetermined distance during a second time period that is subsequent to the first time period. The second imaging area is separated from the first imaging area by the predetermined distance. The processing system is configured to determine a displacement sum using a first displacement between the first feature in the first reference frame and the first feature in the first comparison frame and a second displacement between the second feature in the second reference frame and the second feature in the second comparison frame.
Information query