Electrical resistors – With heat dissipating projections
Patent
1993-11-12
1996-01-02
Hoang, Tu
Electrical resistors
With heat dissipating projections
338275, H01C 108
Patent
active
054812410
ABSTRACT:
A low-cost heat sink-mounted power film resistor having a high power rating for its footprint size, and not incorporating any housing. The resistor is bolted or otherwise secured tightly to an external heat sink in high heat-conduction relationship, the external heat sink being contacted flatwise by a rectangular internal heat sink. The footprint size and shape of the internal heat sink correspond substantially to those of commercially-marketed power film resistors having molded synthetic resin housings. The internal heat sink is bonded in high heat-conductivity relationship to a ceramic chip having a resistive film on the side thereof remote from the heat sink. Over such resistive film is a thin environmental coating. The leads are provided and connected to spaced portions of the film, on metalization pads.
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Caddock Electronics, Inc.
Gausewitz Richard L.
Hoang Tu
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