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US3784883A Expired / Lapsed US ⏱️ 0.0 years remaining

Transistor package

Assignee: Communications Transistor Corp
•
Filing: 1971-07-19
•
Granted: 1974-01-08
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Expires: 1991-07-19
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Abstract

Abstract In a transistor packaging having an input, an output and a common lead, the common lead includes a pair of terminal strip portions disposed on opposite sides of the transistor die. An array of generally parallel common connector wires interconnect both of the common lead terminal strip portions and one of the base or emitter electrode structures on the transistor die. The other one of the emitter or base electrode structures is connected to the input lead via the intermediary of an array of wires interdigitated with the array of common connector wires. In this manner, the common lead inductance of the transistor package is reduced resulting in improved gain and/or r.f. stability of the transistor.

Inventors

  • 👤 D Duncan
  • 👤 J Johnson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 16:40
CPC Classifications
H; H10; H10W; H10W44/00; H10W44/20; H10W44/226; H10W72/00; H10W72/50; H10W72/541; H10W72/5445

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 236 words
In a radio frequency transistor package, a transistor die having base, emitter and collector electrode structures thereon for making connection to respective underlying semiconductive regions of said transistor die, input, output and common conductive lead means for making electrical connection to said transistor die, said common lead means including a pair of terminal strip portions disposed on opposite sides of said transistor die means, an array of generally parallel input connector wires interconnecting said input lead and one of said emitter and base electrode structures, an array of generally parallel common connector wires interconnecting both of said terminal strip portions of said common lead means and the other one of said emitter and base electrode structures, an electrically insulative ceramic substrate structure, said input lead means including a conductive sheet disposed upon and interfacing with a first face of said ceramic substrate structure, said output lead means including a conductive sheet disposed upon and interfacing with said same first face of said same ceramic substrate structure, said transistor die being disposed overlaying a portion of said output lead with said collector electrode structure thereof disposed facing said output lead in mutually opposed relation therewith, said common lead means including a portion underlying said ceramic substrate structure, and wherein said array of common connEctor wires is connected to said underlying common lead means through openings in said ceramic substrate structure on opposite sides of said transistor die.
Claim 2
Dependent Claim 236 words
In a radio frequency transistor package, a transistor die having base, emitter and collector electrode structures thereon for making connection to respective underlying semiconductive regions of said transistor die, input, output and common conductive lead means for making electrical connection to said transistor die, said common lead means including a pair of terminal strip portions disposed on opposite sides of said transistor die means, an array of generally parallel input connector wires interconnecting said input lead and one of said emitter and base electrode structures, an array of generally parallel common connector wires interconnecting both of said terminal strip portions of said common lead means and the other one of said emitter and base electrode structures, an electrically insulative ceramic substrate structure, said input lead means including a conductive sheet disposed upon and interfacing with a first face of said ceramic substrate structure, said output lead means including a conductive sheet disposed upon and interfacing with said same first face of said same ceramic substrate structure, said transistor die being disposed overlaying a portion of said output lead with said collector electrode structure thereof disposed facing said output lead in mutually opposed relation therewith, said common lead means including a portion underlying said ceramic substrate structure, and wherein said array of common connEctor wires is connected to said underlying common lead means through openings in said ceramic substrate structure on opposite sides of said transistor die.
Claim 3
Dependent Claim 29 words
The apparatus of claim 1 wherein a substantial portion of said array of common connector wires are generally parallel to and interdigitated with said array of input connector wires.
Claim 4
Dependent Claim 53 words
The apparatus of claim 1 wherein said pair of terminal strip portions of said common lead project from said underlying common lead into respective openings in said ceramic substrate structure on opposite sides of said die to facilitate connection of said common connector wires to said terminal strip portions of said common lead.
Claim 5
Dependent Claim 79 words
The apparatus of claim 1 wherein said openings in said ceramic substrate structure are slots, a first one of said slots in said ceramic substrate being disposed between mutually opposed inner ends of said conductive sheet portions of said input and output leads, said conductive sheet portion of said output lead having a slot therein, and the second one of said slots in said ceramic substrate being disposed in registration with and underlying said slot in said output lead.
Claim 6
Dependent Claim 285 words
In a radio frequency transistor package, a transistor die having base, emitter and collector electrode structures thereon for making connection to respective underlying semiconductive regions of said transistor die, input, output and common conductive lead means for making electrical connection to said transistor die, said common lead means including a pair of terminal strip portions disposed on opposite sides of said transistor die means, an array of generally parallel input connector wires interconnecting said input lead and one of said emitter and base electrode structures, an array of generally parallel common connector wires interconnecting both of said terminal strip portions of said common lead means and the other one of said emitter and base electrode structure, an electrically insulative ceramic substrate structure, said input lead means including a conductive sheet disposed upon and interfacing with a first face of said ceramic substrate structure, said output lead means including a conductive sheet disposed upon and interfacing with said same first face of said ceramic substrate structure, said transistor die being disposed overlaying a portion of said output lead with said collector electrode structure thereof disposed facing said output lead in mutually opposed relation therewith, a first one of said pair of terminal strip portions of said common lead comprising a conductive strip disposed upon and interfacing with said first face of said ceramic substrate which is common to said input lead and output lead, said first terminal strip portion of said common lead being disposed between mutually opposed inner ends of said input and output leads, and wherein a second one of said pair of terminal strip portions of said common lead comprises a conductive bridge passing over said output lead in electrically insulative relation therewith.
Claim 7
Dependent Claim 285 words
In a radio frequency transistor package, a transistor die having base, emitter and collector electrode structures thereon for making connection to respective underlying semiconductive regions of said transistor die, input, output and common conductive lead means for making electrical connection to said transistor die, said common lead means including a pair of terminal strip portions disposed on opposite sides of said transistor die means, an array of generally parallel input connector wires interconnecting said input lead and one of said emitter and base electrode structures, an array of generally parallel common connector wires interconnecting both of said terminal strip portions of said common lead means and the other one of said emitter and base electrode structure, an electrically insulative ceramic substrate structure, said input lead means including a conductive sheet disposed upon and interfacing with a first face of said ceramic substrate structure, said output lead means including a conductive sheet disposed upon and interfacing with said same first face of said ceramic substrate structure, said transistor die being disposed overlaying a portion of said output lead with said collector electrode structure thereof disposed facing said output lead in mutually opposed relation therewith, a first one of said pair of terminal strip portions of said common lead comprising a conductive strip disposed upon and interfacing with said first face of said ceramic substrate which is common to said input lead and output lead, said first terminal strip portion of said common lead being disposed between mutually opposed inner ends of said input and output leads, and wherein a second one of said pair of terminal strip portions of said common lead comprises a conductive bridge passing over said output lead in electrically insulative relation therewith.
Claim 8
Dependent Claim 29 words
The apparatus of claim 5 wherein a substantial portion of said array of common connector wires are generally parallel to and interdigitated with said array of input connector wires.

References Cited (Backward Citations)

US3515952A Cited
US3387190A Cited
US3489956A Cited
US3509434A Cited
US3554821A Cited
US3478161A Cited
US3577181A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-07 1977-07-09 1978-01-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-07 1981-07-09 1982-01-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-07 1985-07-09 1986-01-08 $7700.00 Window Closed / Lapsed

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