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US3769619A Expired / Lapsed US ⏱️ 0.0 years remaining

Stripline assembly for use in microwave circuits and method of fabricating same

Assignee: Northrop Grumman Corp
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Filing: 1972-04-20
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Granted: 1973-10-30
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Expires: 1992-04-20
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Abstract

Abstract A stripline assembly suitable for use as a delay line in a microwave amplifier tube or the like is formed by bonding a dielectric isolator at one face thereof to a conductive stripline of a highly conductive metal such as copper, and at the opposite face to a highly conductive support base which also may be of copper. The dielectric material which may be of a high thermal conductivity ceramic is bonded to the aforementioned metallic components by depositing a thin metallic layer of material such as molybdenum onto each of the ceramic faces to achieve a good metal-ceramic bond. A second metallic layer which may be of copper is then deposited onto the molybdenum to provide a medium which can be brazed to the copper stripline and the support base, as the case may be.

Inventors

  • 👤 Yi Ang Choh
  • 👤 G Mills

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 04:38
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/085; H01P9/00; H01P9/006

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 25 words
The assembly of claim 1 wherein said ceramic member is selected from the group consisting of beryllium oxide, aluminum oxide, boron nitride and silicon oxide.
Claim 2
Dependent Claim 13 words
The device of claim 1 wherein said ceramic member is of beryllium oxide.
Claim 3
Dependent Claim 34 words
The device of claim 1 and additionally including a layer of gold deposited over each of said copper layers to form a copper-gold eutectic to facilitate brazing to said stripline and said support base.
Claim 4
Dependent Claim 34 words
The device of claim 1 and further including a layer of silver deposited over each of said copper layers to form a copper-silver eutectic to facilitate brazing to the stripline and said support base.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-10-29 1977-04-30 1977-10-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-10-29 1981-04-30 1981-10-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-10-29 1985-04-30 1985-10-30 $7700.00 Window Closed / Lapsed

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