Semiconductor package with lid heat spreader

Details Semiconductor package with lid heat spreader Semiconductor package with lid heat spreader

2005-02-22

2005-02-22

Parekh, Nitin (Department: 2811)

Active solid-state devices (e.g., transistors, solid-state diode

Housing or package

Insulating material

C257S715000, C257S705000, C257S706000, C257S712000, C257S713000, C257S714000, C257S720000, C257S721000

Reexamination Certificate

active

06858929

ABSTRACT:
The invention provides a semiconductor package having a substrate, a top surface and at least one semiconductor device attached to the top surface of the substrate. A cover is secured to the substrate creating a space between the cover and the substrate, with the semiconductor device residing within the space. The cover includes an inner chamber that is defined by an upper wall and a lower wall of the cover. The cavity contains a two-phase vaporizable liquid and a wick. Advantageously, the wick on the lower wall includes at least one recess that forms a thinned wall adjacent to a high heat generation portion of the semiconductor device. In one embodiment, the wick on the lower wall includes at least one channel that communicates with at least one of the recesses.

REFERENCES:
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patent: 3984861 (1976-10-01), Kessler, Jr.
patent: 4327399 (1982-04-01), Sasaki et al.
patent: 4374457 (1983-02-01), Wiech, Jr.
patent: 4519447 (1985-05-01), Wiech, Jr.
patent: 4531145 (1985-07-01), Wiech, Jr.
patent: 4697205 (1987-09-01), Eastman
patent: 5933323 (1999-08-01), Bhatia et al.
patent: 6133631 (2000-10-01), Belady
patent: 6525420 (2003-02-01), Zuo et al.

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