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:
Jan. 21, 2014
Filed:
Sep. 02, 2009
Applicants:
Ran Shi Wang, Kwai Chung, HK;
Wing Hong Leung, Kwai Chung, HK;
Siu Wing Lau, Kwai Chung, HK;
Inventors:
Assignee:
ASM Assembly Automation Ltd, Hong Kong, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/35 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of aligning a die when the die is held with a circuit pattern on a first side of the die facing away from an infrared light source, wherein infrared light from the infrared light source is projected onto a second side of the die opposite to the first side such that the infrared light passes through a body of the die. From the second side of the die, an image of the infrared light reflected from the circuit pattern is detected and captured. Thereafter, an alignment of the die from the captured image of the die is determined.