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US 2020/0058780 A1Published application
Field Plates on Two Opposed Surfaces of Double-Base Bidirectional Bipolar Transistor: Devices, Methods, and Systems
AssigneeIdeal Power Inc.
InventorsWilliam C. Alexander, Richard A. Blanchard
Life of this patent
Estimating the term…
Abstract
Dual-base two-sided bipolar power transistors which use an insulated field plate to separate the emitter/collector diffusions from the nearest base contact diffusion. This provides a surprising improvement in turn-off performance, and in breakdown voltage.
Claims9
1-14. (canceled)
A method for switching, comprising:
- in the ON state, driving base current through one, but not both, of first and second p-type base contact regions which are located on opposite faces of a p-type substrate, to thereby allow passage of current between first and second n-type emitter/collector regions which are also located on opposite faces of the p-type substrate;
- wherein the base contact regions and the emitter/collector regions are laterally separated, on both faces of the substrate, by a vertically extended conductive field plate which is laterally surrounded by dielectric material;
- and
- in the OFF state, reducing peak electric field near the emitter-base junctions by capacitive coupling to the insulated field plate.
1 more element
A method for switching, comprising:
- in the ON state, driving base current through one, but not both, of first and second n-type base contact regions which are located on opposite faces of a n-type substrate, to thereby allow passage of current between first and second p-type emitter/collector regions which are also located on opposite faces of the n-type substrate;
- wherein the base contact regions and the emitter/collector regions are laterally separated, on both faces of the substrate, by a vertically extended conductive field plate which is laterally surrounded by dielectric material;
- and
- in the OFF state, reducing peak electric field near the emitter-base junctions by capacitive coupling to the insulated field plate.
1 more element
Dependencies are inferred from the claim text.