Semiconductor diodes fabricated by aspect ratio trapping with coalesced films
First Claim
Patent Images
1. A method comprising:
- depositing a layer of a dielectric material onto a substrate;
patterning two or more openings in the dielectric material to expose respective portions of a surface of the substrate, the two or more openings having an aspect ratio of at least 1;
forming a bottom diode region by growing a compound semiconductor material that is lattice mismatched to a crystalline material of the substrate in the two or more openings, the compound semiconductor material adjoining the crystalline material, and allowing the compound semiconductor material to fill the two or more openings and coalesce above the two or more openings to form a continuous layer;
forming an active diode region on the bottom diode region; and
forming a top diode region on the active diode region.
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Abstract
A photonic device comprises a substrate and a dielectric material including two or more openings that expose a portion of the substrate, the two or more openings each having an aspect ratio of at least 1. A bottom diode material comprising a compound semiconductor material that is lattice mismatched to the substrate occupies the two or more openings and is coalesced above the two or more openings to form the bottom diode region. The device further includes a top diode material and an active diode region between the top and bottom diode materials.
365 Citations
20 Claims
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1. A method comprising:
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depositing a layer of a dielectric material onto a substrate; patterning two or more openings in the dielectric material to expose respective portions of a surface of the substrate, the two or more openings having an aspect ratio of at least 1; forming a bottom diode region by growing a compound semiconductor material that is lattice mismatched to a crystalline material of the substrate in the two or more openings, the compound semiconductor material adjoining the crystalline material, and allowing the compound semiconductor material to fill the two or more openings and coalesce above the two or more openings to form a continuous layer; forming an active diode region on the bottom diode region; and forming a top diode region on the active diode region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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depositing a layer of a dielectric material on a substrate; patterning two or more openings in the dielectric material to expose portions of a surface of the substrate, the two or more openings having an aspect ratio of at least 1; forming a bottom diode region by; growing a compound semiconductor material in the two or more openings, the compound semiconductor material being lattice mismatched to a crystalline material of the substrate in the portions of the surface of the substrate, and growing the compound semiconductor material to coalesce above a top surface of the dielectric material between the two or more openings to form a continuous layer; forming an active diode region on the bottom diode region; forming a top diode region on the active diode region; bonding a handle substrate to the top diode region; and removing the substrate. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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depositing a layer of dielectric material on a substrate; patterning a first set of openings in the layer of dielectric material to expose first portions of a surface of the substrate, the first set of openings having an aspect ratio of at least 1; forming a first bottom diode region by growing a first semiconductor material that is lattice mismatched to a crystalline material of the substrate in the first set of openings and growing the first semiconductor material to coalesce above the layer of dielectric material and between respective ones of the first set of openings to form a first continuous layer; forming a first active diode region on the first bottom diode region; forming a first top diode region on the first active diode region; masking the first bottom diode region, first active diode region, and first top diode region; patterning a second set of openings in the layer of dielectric material to expose second portions of the surface of the substrate, the second set of openings having an aspect ratio of at least 1; forming a second bottom diode region by growing a second semiconductor material that is lattice mismatched to the crystalline material of the substrate in the second set of openings and growing the second semiconductor material to coalesce above the layer of dielectric material and between respective ones of the second set of openings to form a second continuous layer; forming a second active diode region on the second bottom diode region; and forming a second top diode region on the second active diode region. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification