Cascode semiconductor device structure and method therefor
First Claim
1. A semiconductor device comprising:
- a semiconductor substrate having a first major surface and an opposing second major surface;
a heterostructure adjacent the first major surface, the heterostructure comprising;
a channel layer; and
a barrier layer over the channel layer;
a first electrode disposed proximate to a first portion of the channel layer;
a second electrode disposed proximate to a second portion of the channel layer and spaced apart from the first electrode;
a third electrode disposed on the second major surface of the semiconductor substrate;
a control electrode disposed between the first electrode and the second electrode and configured to control a first current path between the first electrode and the second electrode;
a first trench electrode extending through the heterostructure into the semiconductor substrate, wherein the first trench electrode is electrically connected to the first electrode; and
a rectifier device disposed in the semiconductor substrate and electrically connected to the first trench electrode and electrically connected to the third electrode, but not electrically connected to the second electrode, wherein the rectifier device is configured to provide a second current path generally perpendicular to the first current path, and wherein the control electrode is electrically connected to the third electrode through the semiconductor substrate to provide the semiconductor device as a two-terminal device.
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0 Petitions
Accused Products
Abstract
In one embodiment, a cascode rectifier structure includes a group III-V semiconductor structure includes a heterostructure disposed on a semiconductor substrate. A first current carrying electrode and a second current carrying electrode are disposed adjacent a major surface of the heterostructure and a control electrode is disposed between the first and second current carrying electrode. A rectifier device is integrated with the group III-V semiconductor structure and is electrically connected to the first current carrying electrode and to a third electrode. The control electrode is further electrically connected to the semiconductor substrate and the second current path is generally perpendicular to a primary current path between the first and second current carrying electrodes.
15 Citations
11 Claims
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1. A semiconductor device comprising:
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a semiconductor substrate having a first major surface and an opposing second major surface; a heterostructure adjacent the first major surface, the heterostructure comprising; a channel layer; and a barrier layer over the channel layer; a first electrode disposed proximate to a first portion of the channel layer; a second electrode disposed proximate to a second portion of the channel layer and spaced apart from the first electrode; a third electrode disposed on the second major surface of the semiconductor substrate; a control electrode disposed between the first electrode and the second electrode and configured to control a first current path between the first electrode and the second electrode; a first trench electrode extending through the heterostructure into the semiconductor substrate, wherein the first trench electrode is electrically connected to the first electrode; and a rectifier device disposed in the semiconductor substrate and electrically connected to the first trench electrode and electrically connected to the third electrode, but not electrically connected to the second electrode, wherein the rectifier device is configured to provide a second current path generally perpendicular to the first current path, and wherein the control electrode is electrically connected to the third electrode through the semiconductor substrate to provide the semiconductor device as a two-terminal device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification