The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 1994
Filed:
Dec. 23, 1991
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356400 ; 356375 ;
Abstract
A semiconductor chip position detector including a transparent film on which semiconductor chips are placed, a film table on which the film is placed, a light source, optical fiber cables provided in the vicinity of the film table, by which light beams from the light source are radiated onto the semiconductor chips through the film having the semiconductor chips placed thereon, and a position recognition device provided above the film for recognizing the positions of the semiconductor chips based on shadow shapes of the semiconductor chips generated by the radiated light.