Method for forming gallium nitride devices with conductive regions
First Claim
1. A method of forming a semiconductor device structure comprising:
- forming a gallium nitride material layer on a substrate;
forming a via that extends through at least a portion of said substrate;
forming a barrier material layer along sidewalls of said via, said barrier material layer not extending outside of said via;
forming a layer comprising an electrically conductive material on a back surface of said substrate to form a semiconductor structure;
heating said semiconductor structure to form a bond between said semiconductor structure and a component.
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Accused Products
Abstract
Semiconductor structures comprising a III-nitride (e.g., gallium nitride) material region and methods associated with such structures are provided. In some embodiments, the structures include an electrically conductive material (e.g., gold) separated from certain other region(s) of the structure (e.g., a silicon substrate) by a barrier material in order to limit, or prevent, undesirable reactions between the electrically conductive material and the other component(s) which can impair device performance. In certain embodiments, the electrically conductive material may be formed in a via. For example, the via can extend from a topside of the device to a backside so that the electrically conductive material connects a topside contact to a backside contact. The structures described herein may form the basis of a number of semiconductor devices including transistors (e.g., FET), Schottky diodes, light-emitting diodes and laser diodes, amongst others.
80 Citations
20 Claims
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1. A method of forming a semiconductor device structure comprising:
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forming a gallium nitride material layer on a substrate; forming a via that extends through at least a portion of said substrate; forming a barrier material layer along sidewalls of said via, said barrier material layer not extending outside of said via; forming a layer comprising an electrically conductive material on a back surface of said substrate to form a semiconductor structure; heating said semiconductor structure to form a bond between said semiconductor structure and a component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of forming a semiconductor device comprising:
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forming a gallium nitride material layer on a silicon substrate; forming a via that extends through at least a portion of said silicon substrate; forming a bather material layer along sidewalls of said via, said barrier material layer not extending outside of said via; forming a layer comprising an electrically conductive material on a back surface of said silicon substrate to form a semiconductor structure; heating said semiconductor structure to form a liquid eutectic comprising said electrically conductive material and silicon; and cooling said liquid eutectic to form a bond between said semiconductor structure and a component. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification