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US 6,586,782 B1Granted
Transistor layout having a heat dissipative emitter
AssigneeSkyworks Solutions, Inc.
InventorHugh J. Finlay
Life of this patent
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Abstract
Various embodiments of a novel transistor layout having improved electrical and heat dissipation characteristics are disclosed. Several embodiments include various intrinsic components contoured to the shape of the emitter. The various intrinsic components may include a collector layer center portion, a collector contact, a base pedestal, and/or a base contact. Additional embodiments include improved heat dissipation within single transistors. Still further embodiments include improved heat dissipation across a plurality of transistors.
Claims30
A transistor, comprising:
- (a) an emitter having an exterior border, the emitter comprising:
- a plurality of feed points configured to provide a plurality of current and heat paths to and from the emitter;
- (b) a plurality of spaced apart extended leg portions of a metal layer coupled to the plurality of feed points and configured to provide the plurality of heat paths from the emitter to an inactive region outside an exterior border of a sub-collector layer portion of the transistor;
- (c) a collector,
- the collector having a collector layer center portion and the subcollector layer portion,
- the collector layer center portion having an exterior border, the collector layer center portion exterior border being contoured to the emitter exterior border for a substantial percentage of the emitter exterior border,
- the subcollector layer having a top surface and a bottom surface,
- the collector layer center portion being disposed on the subcollector layer top surface;
- (d) a collector contact,
- the collector contact being disposed on the subcollector layer top surface,
- the collector contact having an interior border, the collector contact interior border being contoured to the emitter exterior border for a substantial percentage of the emitter exterior border;
- and
- (e) a base pedestal, the base pedestal being disposed on a top surface of the collector layer center portion.
10 more elements
Dependencies are inferred from the claim text.