Diode-based devices and methods for making the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01L-033/40
H01L-033/24
H01L-031/18
H01L-021/02
H01L-029/04
H01L-029/88
H01L-033/08
H01L-033/18
출원번호
US-0554516
(2012-07-20)
등록번호
US-9040331
(2015-05-26)
발명자
/ 주소
Lochtefeld, Anthony J.
출원인 / 주소
Taiwan Semiconductor Manufacturing Company, Ltd.
대리인 / 주소
Slater & Matsil, L.L.P.
인용정보
피인용 횟수 :
3인용 특허 :
256
초록▼
In accordance with an embodiment, a diode comprises a substrate, a dielectric material including an opening that exposes a portion of the substrate, the opening having an aspect ratio of at least 1, a bottom diode material including a lower region disposed at least partly in the opening and an upper
In accordance with an embodiment, a diode comprises a substrate, a dielectric material including an opening that exposes a portion of the substrate, the opening having an aspect ratio of at least 1, a bottom diode material including a lower region disposed at least partly in the opening and an upper region extending above the opening, the bottom diode material comprising a semiconductor material that is lattice mismatched to the substrate, a top diode material proximate the upper region of the bottom diode material, and an active diode region between the top and bottom diode materials, the active diode region including a surface extending away from the top surface of the substrate.
대표청구항▼
1. A method of forming a diode, the method comprising: depositing a layer of a dielectric material over a substrate, the dielectric material having a dielectric surface distal from the substrate;patterning a first opening in the dielectric material to expose a first portion of the substrate, the fir
1. A method of forming a diode, the method comprising: depositing a layer of a dielectric material over a substrate, the dielectric material having a dielectric surface distal from the substrate;patterning a first opening in the dielectric material to expose a first portion of the substrate, the first opening being through the dielectric surface of the dielectric material, the first opening having an aspect ratio of at least 1;forming a first bottom diode region by growing a compound semiconductor material that is lattice mismatched to the substrate in and above the first opening, the first bottom diode region having a first sidewall surface extending above and away from the dielectric surface of the dielectric material;forming a first active diode region directly adjacent the first sidewall surface of the first bottom diode region, the first active diode region having a second sidewall surface extending above and away from the dielectric surface of the dielectric material; andforming a top diode region directly adjacent the second sidewall surface of the first active diode region in a plane parallel to the dielectric surface of the dielectric material intersecting the first bottom diode region, the first active diode region, and the top diode region. 2. The method of claim 1 wherein the active diode region contains multiple quantum wells. 3. The method of claim 1 wherein the substrate is selected from the group consisting of silicon, sapphire, and silicon carbide. 4. The method of claim 1 wherein the opening is a trench and/or a hole. 5. The method of claim 1 wherein the compound semiconductor material comprises a material selected from the group consisting essentially of a Group III-V compound, a Group II-VI compound, and a Group IV alloy. 6. The method of claim 1 wherein the opening is a trench. 7. The method of claim 1 further comprising: patterning a second opening in the dielectric material to expose a second portion of the substrate, the second opening having an aspect ratio of at least 1;forming a second bottom diode region by growing a compound semiconductor material that is lattice mismatched to the substrate in and above the second opening; andforming a second active diode region adjacent the second bottom diode region, wherein the top diode region is formed laterally adjacent the second active diode region. 8. A method of forming a diode, the method comprising: depositing a layer of a dielectric material onto a substrate;patterning first and second openings in the dielectric material to expose portions of the substrate, the first and second openings extending from an upper surface of the dielectric material to the substrate, each of the openings having an aspect ratio of at least 1;forming a first bottom diode region by growing a compound semiconductor material that is lattice mismatched to the substrate in the first opening and above the upper surface of the dielectric material;forming a second bottom diode region by growing a compound semiconductor material that is lattice mismatched to the substrate in the second opening and above the upper surface of the dielectric material;forming a first active diode region adjacent the first bottom diode region;forming a second active diode region adjacent the second bottom diode region; andforming a single top diode region laterally adjacent the first active diode region and the second active diode region, the single top diode region directly adjoining the upper surface of the dielectric material between the first opening and the second opening. 9. The method of claim 8 wherein the first and second active diode regions contain multiple quantum wells. 10. The method of claim 8 wherein the substrate is selected from the group consisting of silicon, sapphire, and silicon carbide. 11. The method of claim 8 wherein the substrate is a single crystal silicon wafer. 12. The method of claim 11 wherein the substrate has a crystal orientation of (111) or (100). 13. The method of claim 8 wherein the dielectric material comprises silicon dioxide or silicon nitride. 14. The method of claim 8 wherein the first and second openings are trenches. 15. The method of claim 8 wherein the first and second openings are holes. 16. The method of claim 8 wherein the semiconductor material comprises a Group III-V compound. 17. The method of claim 8 wherein the semiconductor material comprises a Group II-VI compound. 18. The method of claim 8 wherein the semiconductor material comprises a Group IV alloy. 19. A method comprising: forming a dielectric layer over a substrate;forming a first trench and a second trench in the dielectric layer to the substrate;forming a first fin as a first bottom diode region, the first fin comprising a compound semiconductor material that is lattice mismatched to the substrate, the first fin being in the first trench and extending above the first trench, the first fin having a first sidewall extending away from the dielectric layer;forming a second fin as a second bottom diode region, the second fin comprising a compound semiconductor material that is lattice mismatched to the substrate, the second fin being in the second trench and extending above the second trench, the second fin having a second sidewall extending away from the dielectric layer, a plane intersecting the first sidewall of the first fin and the second sidewall of the second fin;forming a first active diode region adjacent the first sidewall of the first fin, the first active diode region having a third sidewall extending away from the dielectric layer;forming a second active diode region adjacent the second sidewall of the second fin, the second active diode region having a fourth sidewall extending away from the dielectric layer; andforming a top diode region disposed at least in part between the third sidewall of the first active diode region and the fourth sidewall of the second active diode region, the plane further intersecting the third sidewall of the first active diode region, the fourth sidewall of the second active diode region, and the top diode region disposed at least in part between the third sidewall and the fourth sidewall. 20. The method of claim 19, wherein an aspect ratio of each of the first trench and the second trench is at least 1.
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