Texas Instruments Corporation

Joe D Woodall

Sreenivasan Kalyani Koduri

Lance Cole Wright

Charles K Harris

Robert F Mortan

A thermally enhanced BGA semiconductor devicehaving a heat sinkformed from a single piece of material with an expanded base and a pedestal in contact with a semiconductor chipThe pedestal is aligned through a window opening in a substrateand the top surface of the base is adhered to the substrate. The heat sinkwith an expanded base provides a path for rapid and efficient heat spreading and dissipation, a stand-off and an aid to improved package planarity during reflow to a PCB, and a long path for ingress of contaminants into the package. The device is amenable to high volume, low cost production.

Thermally enhanced semiconductor package

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.

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Gunter, TX, United States of America

Joe D Woodall