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Growth of Planar, Non-Polar, A-Plane GaN by Hydride Vapor Phase Epitaxy

技术优势: Allows for the production of thick a-plane GaN films for use as substrates for polarization-free device growth; Produces films of superior quality that are suitable for subsequent device regrowth by a variety of growth techniques.

技术应用: Fabrication of GaN by HVPE This technology is available for a non-exclusive license. See below for a selection of the patents and patent applications related to this invention. Please inquire for full patent portfolio status.

详细技术说明: Scientists at the University of California have developed a novel method for growing high-quality thick films of a-plane GaN suitable for use as substrates in homoepitaxial device layer regrowth. This invention can be used in conjunction with a method for growing reduced-dislocation density non-polar GaN by hydride vapor phase epitaxy (HVPE) (UC Case 2003-224).

*Abstract: A novel method for growing high-quality thick films of a-plane GaN suitable for use as substrates in homoepitaxial device layer regrowth.

*Applications

*IP Issue Date: Sep 23, 2008

*Principal Investigation: Name: Michael Craven
Department:

Name: Steven DenBaars
Department:

Name: Paul Fini
Department:

Name: Benjamin Haskell
Department:

Name: Shigemasa Matsuda
Department:

Name: Shuji Nakamura
Department:

Name: James Speck
Department:

附加资料: Patent Number: US7427555B2
Application Number: US2003537385A
Inventor: Haskell, Benjamin A. | Fini, Paul T. | Matsuda, Shigemasa | Craven, Michael D. | DenBaars, Steven P. | Speck, James S. | Nakamura, Shuji
Priority Date: 16 Dec 2002
Priority Number: US7427555B2
Application Date: 3 Jun 2005
Publication Date: 23 Sep 2008
IPC Current: H01L0021205
US Class: 438478 | 117099 | 257E21108 | 257E21121 | 257E29097
Assignee Applicant: The Regents of the University of California | The Japan Science and Technology Agencyitama Prefecture
Title: Growth of planar, non-polar gallium nitride by hydride vapor phase epitaxy
Usefulness: Growth of planar, non-polar gallium nitride by hydride vapor phase epitaxy
Summary: Used for the formation of a planar, non-planar, a-plane gallium nitride film on a substrate used for the manufacturing a laser diode, light emitting diode and transistor (claimed).
Novelty: Formation of planar, non-planar, a-plane gallium nitride film on sapphire substrate for device regrowth involves growing film by reacting gaseous hydrogen chloride with gallium followed by transporting on substrate using hydrogen

主要类别: 光学

细分类别: 发光二极管/有机发光二极管

申请号码: 7427555

其他

Background

Gallium nitride (GaN) and its ternary and quaternary compounds incorporating aluminum and indium (AlGaN, InGaN, AlInGaN) have proven useful in fabricating visible and ultraviolet optoelectronic devices and high-power electronic devices. GaN and its alloys are most stable in the hexagonal w'rtzite crystal structure. However, the positions of the gallium and nitrogen atoms in this structure leads to polarization of the GaN crystals along the c-axis. Virtually all GaN-based devices are grown parallel to the polar c-axis, due to the relative ease of growing planar Ga-face planes. In addition, strain at the interfaces between adjacent dissimilar layers causes piezoelectric polarization and subsequent charge separation. These polarization effects decrease the likelihood of electron and hole interaction, which is essential for the operation of light-emitting devices. As a result, eliminating these polarization effects inherent to c-axis oriented devices could greatly enhance the efficiency of GaN light-emitting devices.

Related Technologies

Reduced Dislocation Density of Non-Polar GaN Grown by Hydride Vapor Phase Epitaxy

Additional Technologies by these Inventors

Tech ID/UC Case

10268/2003-225-0

Related Cases

2003-225-0

国家/地区: 美国

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