Invention Application
- Patent Title: METHOD AND APPARATUS TO DETECT CAPILLARY INDENTATIONS
- Patent Title (中): 检测毛细血管的方法和装置
-
Application No.: PCT/US1995005320Application Date: 1995-05-01
-
Publication No.: WO1995030307A1Publication Date: 1995-11-09
- Inventor: COGNEX CORPORATION
- Applicant: COGNEX CORPORATION , PETRY, John, P. , MICHAEL, David, J. , GARAKANI, Arman
- Assignee: COGNEX CORPORATION,PETRY, John, P.,MICHAEL, David, J.,GARAKANI, Arman
- Current Assignee: COGNEX CORPORATION,PETRY, John, P.,MICHAEL, David, J.,GARAKANI, Arman
- Priority: US8/236,212 19940430
- Main IPC: H04N07/18
- IPC: H04N07/18
Abstract:
This invention provides a method and apparatus for automatically inspecting the connection of a wire (50) to a lead (30) on a lead frame (10) containing a semiconductor chip (20) or similar device. Using an image processor (06) to locate the general position of a soldered lead (30) in a digitized image, the present invention creates, in Step (A), a template (120) of an idealized optical indentation left by a good bond; determines parameters such as wire angle, idealized position and shape thresholds for applying the template (120); conducts a normalized correlation search of a digitized image in Step (C); compares the results returned to the parameters and reports, in Step (D) the resulting signals generated by this comparison to a host controller (08) or other control module.
Information query