Solid-state diode-rectifier and heat sink structure

Details Solid-state diode-rectifier and heat sink structure Solid-state diode-rectifier and heat sink structure

1982-07-26

1985-07-30

James, Andrew J.

357 76, 357 77, 357 72, H01L 2334, H01L 2332, H01L 2702

Patent

active

045325391

ABSTRACT:
A rectifier for association with an automotive alternator is made by providing a support plate (1) of aluminum on which a post (2) of aluminum is secured, for example by welding (FIG. 1) or by gripping a conical or bulged surface within the thickness of the plate (1) upon deformation of the plate after introducing the bulged or double-conical post into a hole in the plate; alternatively, the plate (1) which is of aluminum, can have a copper disk (23) secured thereto, nickel-plated all over, to which the semiconductor diode chip (4) is soldered. To securely retain a casting compound surrounding the diode chip, a sleeve (7) is placed around the chip, and the surface of the plate (1) is deformed to provide for reentrant claws (38), which mechanically grip the casting compound. The diode chip (4) is preferably secured to a copper-plated surface on the post (2), for example by soldering, the post as well as the plate then being made of aluminum for intimate contact with the plate and heat transfer from the diode thereto.

REFERENCES:
patent: 2917286 (1959-12-01), Deakin
patent: 3247896 (1966-04-01), Chu et al.
patent: 3375415 (1968-03-01), Finn, Jr.
patent: 3449506 (1969-06-01), Weinstein et al.
patent: 3513362 (1970-05-01), Yamamoto
patent: 3717523 (1973-02-01), Dunsche
patent: 3743895 (1973-07-01), Klunker et al.
patent: 3743896 (1973-07-01), Weiske et al.
patent: 3793570 (1974-02-01), Crouch et al.
patent: 4305088 (1981-12-01), Narita et al.
"Mounting Techniques for Press-Fit Rectifiers"--Joseph Lucas (Electrical) Ltd. Technical Publications Group--Electronic Components, Nov. 1970, pp. 1313-1318.
"Snap-On Heat Exchanger"--Mulligan--IBM Tech. Bulletin, vol. 10, No. 8, Jan 1968, p. 1242.

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