Microwave transistor package

Details Microwave transistor package Microwave transistor package

1984-01-03

1987-03-10

Sikes, William L.

Electricity: conductors and insulators

Feedthrough or bushing

Compression

357 75, 357 80, 357 81, 174 52FP, H01L 2302, H02G 1308

Patent

active

046494162

ABSTRACT:
A microwave transistor package is provided having a thermal and electrical conductive refractory type substrate. A ground plane plate is provided, such plate having an open-ended compartment therein, the open end of such compartment being disposed adjacent an upper surface portion of the ground plane plate. A bottom surface of such plate is disposed on an upper, inner surface region of the substrate. The thermal coefficient of expansion of the ground plane plate is substantially greater than the thermal coefficient of expansion of the substrate. An electrical insulator is disposed within the compartment, such insulator having a relatively high thermal transfer characteristic and having upper and lower conductive layers with side wall portions disposed adjacent side wall portions of the compartment. A first apertured ceramic insulating layer having conductive metallization regions disposed on the upper surface of the ceramic insulator extending from the apertured edge of the ceramic insulator to the outer edge of the ceramic insulator is provided. The lower surface of the ceramic insulator is disposed over the substrate and about peripheral portions of the inner surface region of the substrate. A second apertured ceramic insulating layer is disposed over and aligned with the first apertured ceramic insulating layer, the upper surface of the second ceramic insulating layer being metallized and bondable to a cover for such package. The package is fabricated by brazing together, in a single step, the pair of ceramic insulating layers, the electrical insulator and the substrate.

REFERENCES:
patent: 3683241 (1972-08-01), Duncan
patent: 3728589 (1973-04-01), Caulton
patent: 3753056 (1973-08-01), Cooke
patent: 3784884 (1974-01-01), Zoroglu
patent: 3936864 (1976-02-01), Benjamin
patent: 3946428 (1976-03-01), Anazawa et al.
patent: 3996603 (1976-12-01), Smith
patent: 4023198 (1977-05-01), Malone et al.
patent: 4092664 (1978-05-01), Davis, Jr.
patent: 4150393 (1979-04-01), Wilson et al.
patent: 4172261 (1979-10-01), Tsuzuki et al.
patent: 4213141 (1980-07-01), Colussi

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