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:
Sep. 18, 2001
Filed:
Jul. 08, 1998
Sreenivasan K. Koduri, Dallas, TX (US);
Joe D. Woodall, Euless, TX (US);
Lance C. Wright, Richardson, TX (US);
Charles K. Harris, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An illumination system for wire bonding at wire bonding locations which includes a first light source for directing light to the location to be illuminated along a predetermined axis, preferably normal to the wire bonding location, and a second light source having an aperture therethrough extending along the predetermined axis directing light in a pattern from around the aperture to the location to be illuminated. A portion of the light is reflectable back from the location to be illuminated through the aperture. The first light source directs light therefrom through the aperture. The light from the second light source for viewing of the lead frame comes from around the object and is diffused so that it scatters in all directions and at all angles. The amount of scattering depends upon the surface roughness at the edge of the light conductor from which the light exits the light conductor. A beam splitter is disposed between the first light source and the aperture, the light from the first light source passing through the beam splitter. The system also receives and stores a digital representation of the reflected light which is reflected from the beam splitter. The system optionally includes a third light source for directing light to the location to be illuminated. The light sources are individually controllable.