Cubic phase, nitrogen-based compound semiconductor films
First Claim
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1. A method of forming a semiconductor device, comprising:
- forming a plurality of grooves within a semiconductor substrate;
forming a mask structure comprising a plurality of openings therein over the semiconductor substrate wherein the plurality of openings are aligned with the plurality of grooves;
growing a nitrogen-based compound semiconductor epitaxial layer from each of the plurality of grooves in the semiconductor substrate, the epitaxial layer comprising a first crystal phase and a second crystal phase; and
blocking the first crystal phase material with the sidewalls of the mask structure, wherein at least a portion of the second crystal phase material grows through each of the plurality of openings in the mask structure.
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Abstract
A method of epitaxially growing nitrogen-based compound semiconductor thin films on a semiconductor substrate, which is periodically patterned with grooves. The method can provide an epitaxial growth of a first crystalline phase epitaxial film on the substrate, and block the growth of an initial crystalline phase with barrier materials prepared at the sides of the grooves. Semiconductor devices employing the epitaxial films are also disclosed.
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Citations
17 Claims
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1. A method of forming a semiconductor device, comprising:
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forming a plurality of grooves within a semiconductor substrate; forming a mask structure comprising a plurality of openings therein over the semiconductor substrate wherein the plurality of openings are aligned with the plurality of grooves; growing a nitrogen-based compound semiconductor epitaxial layer from each of the plurality of grooves in the semiconductor substrate, the epitaxial layer comprising a first crystal phase and a second crystal phase; and blocking the first crystal phase material with the sidewalls of the mask structure, wherein at least a portion of the second crystal phase material grows through each of the plurality of openings in the mask structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of forming a semiconductor device, comprising:
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forming a plurality of grooves within a semiconductor substrate; forming a mask structure comprising a plurality of openings therein over the semiconductor substrate wherein the plurality of opening are aligned with the plurality of grooves; growing an epitaxial layer from each of the plurality of grooves in the semiconductor substrate, wherein the epitaxial layer comprises hexagonal phase material and cubic phase material; blocking growth of the hexagonal phase material with a portion of the mask structure, wherein the cubic phase material grows through each of the plurality of openings in the mask structure; stopping the growth of the cubic phase material; forming a planarization material over an upper surface of the cubic phase material; removing a portion of the planarization material; forming a mask having openings over the planarization material, wherein the openings are spaced a lateral distance from each of the plurality of grooves; etching the planarization material through the mask openings to form a space between a surface of the mask structure and the mask; further growing the cubic phase material to at least partially fill the space between the first mask layer and the second mask layer; and removing the second mask layer to expose the cubic phase material. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of forming a semiconductor device, comprising:
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forming a plurality of grooves within a semiconductor substrate; forming a mask structure comprising a plurality of openings therein over the semiconductor substrate wherein the plurality of opening are aligned with the plurality of grooves; growing an epitaxial layer from each of the plurality of grooves in the semiconductor substrate, wherein the epitaxial layer comprises hexagonal phase material and cubic phase material; blocking growth of the hexagonal phase material with a portion of the mask structure, wherein the cubic phase material grows through each of the plurality of openings in the mask structure; and covering an upper surface of the mask layer with lateral growth of the cubic phase material, wherein the crystal growth is stopped before complete coalescence so as to form a plurality of island films. - View Dependent Claims (17)
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Specification