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:
Dec. 02, 1980
Filed:
Feb. 14, 1979
Yoshiaki Arimura, Yokohama, JP;
Tokyo Shibaura Electric Co., Ltd., Kawasaki, JP;
Abstract
A bonding apparatus for IC pellets is provided with an illumination system for illuminating the IC pellet and a microscope for observing the IC pellet. The illumination system is of reflected dark field illumination since the circuit pattern and pad for IC pellet bonding is coarse in the surface while the remaining IC pellet region has a mirror face. The illumination system includes a light source providing a spot light and a light reflecting plate for converting the spot light into scattered light. The light source and the light reflecting plate are both so disposed that the spot light from the light source is not directed directly to the pellet but directed to the light diffusion plate. The light diffusion plate is disposed so that the scattered light reflected by the light diffusion plate is directed to the pellet. The microscope is disposed so as to receive a specified light irregularly reflected by the pattern with coarse face in the light incident to the IC pellets.