Media.Player

Low Temperature Deposition of Magnesium Doped Nitride Films

Technology Benefits

Reduced damages to the multi quantum well materials Increased output power of nitride LED and improved device performance

Technology Application

Nitride LEDs and Laser Diodes    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.

Detailed Technology Description

Researchers at the University of California, Santa Barbara have developed a method for growing an improved quality device by depositing a low temperature magnesium doped nitride semiconductor thin film. This process includes using deposition temperature for the magnesium doped GaN film that is lower than the one used for the deposition of the multi quantum well. This results in a significant increase in the output power of a nitride LED.

Supplementary Information

Inventor: IZA, Michael | SATO, Hitoshi | DENBAARS, Steven, P. | NAKAMURA, Shuji
Priority Number: WO2008021403A3
IPC Current: H01L002100
Assignee Applicant: The Regents of the University of California
Title: METHOD FOR DEPOSITION OF MAGNESIUM DOPED (AL, IN, GA, B)N LAYERS | PROCÉDÉ POUR DÉPOSER DES COUCHES (Al, In, Ga, B)N DOPÉES AU MAGNÉSIUM
Usefulness: METHOD FOR DEPOSITION OF MAGNESIUM DOPED (AL, IN, GA, B)N LAYERS | PROCÉDÉ POUR DÉPOSER DES COUCHES (Al, In, Ga, B)N DOPÉES AU MAGNÉSIUM
Summary: For growing improved quality device such as light emitting diode (LED) (claimed) and laser diodes (LDs).
Novelty: Growing improved quality device e.g. LED, involves depositing indium containing nitride-based quantum well layers; and depositing low temperature magnesium doped nitride semiconductor film on the quantum well layers

Industry

Optics

Sub Category

LED/OLED

Application No.

7709284

Others

Background

Magnesium doped gallium nitride has been extensively used in nitride based LEDs, but requires high deposition temperatures. Indium nitride has a high volatility and readily evaporates out of the InGaN films when exposed to a high enough temperature or a low temperature for an extended period of time. This time and temperature value is commonly referred to as the material's thermal budget. As a result, there is a need for improved methods for the growth of low temperature magnesium doped nitride planar films, wherein the thermal budget of the previously deposited indium nitride containing multiple quantum wells is considerably reduced.

Additional Technologies by these Inventors

• Reduced Dislocation Density of Non-Polar GaN Grown by Hydride Vapor Phase Epitaxy
• Growth of Planar, Non-Polar, A-Plane GaN by Hydride Vapor Phase Epitaxy
• Nonpolar (Al, B, In, Ga)N Quantum Well Design
• Improved Manufacturing of Semiconductor Lasers
• Cleaved Facet Edge-Emitting Laser Diodes Grown on Semipolar GaN
• Enhancing Growth of Semipolar (Al,In,Ga,B)N Films via MOCVD
• GaN-Based Thermoelectric Device for Micro-Power Generation
• Growth of High-Quality, Thick, Non-Polar M-Plane GaN Films
• Method for Growing High-Quality Group III-Nitride Crystals
• Growth of Planar Semi-Polar Gallium Nitride
• Defect Reduction of Non-Polar and Semi-Polar III-Nitrides
• MOCVD Growth of Planar Non-Polar M-Plane Gallium Nitride
• Lateral Growth Method for Defect Reduction of Semipolar Nitride Films
• Growth of Polyhedron-Shaped Gallium Nitride Bulk Crystals
• Improved Manufacturing of Solid State Lasers via Patterning of Photonic Crystals
• Control of Photoelectrochemical (PEC) Etching by Modification of the Local Electrochemical Potential of the Semiconductor Structure
• Phosphor-Free White Light Source
• Single or Multi-Color High Efficiency LED by Growth Over a Patterned Substrate
• High Efficiency LED with Optimized Photonic Crystal Extractor
• Packaging Technique for the Fabrication of Polarized Light Emitting Diodes
• LED Device Structures with Minimized Light Re-Absorption
• (In,Ga,Al)N Optoelectronic Devices with Thicker Active Layers for Improved Performance
• Oxyfluoride Phosphors for Use in White Light LEDs
• III-V Nitride Device Structures on Patterned Substrates
• Growth of Semipolar III-V Nitride Films with Lower Defect Density
• Improved GaN Substrates Prepared with Ammonothermal Growth
• Enhanced Optical Polarization of Nitride LEDs by Increased Indium Incorporation
• Semipolar-Based Yellow, Green, Blue LEDs with Improved Performance
• Hexagonal Wurtzite Type Epitaxial Layer with a Low Alkali-Metal Concentration
• Photoelectrochemical Etching Of P-Type Semiconductor Heterostructures
• Highly Efficient Blue-Violet III-Nitride Semipolar Laser Diodes
• Method for Manufacturing Improved III-Nitride LEDs and Laser Diodes: Monolithic Integration of Optically Pumped and Electrically Injected III-Nitride LEDs
• Defect Reduction in GaN films using in-situ SiNx Nanomask
• Semi-polar LED/LD Devices on Relaxed Template with Misfit Dislocation at Hetero-interface
• Limiting Strain-Relaxation in III-Nitride Heterostructures by Substrate Patterning
• Suppression of Defect Formation and Increase in Critical Thickness by Silicon Doping
• High Efficiency Semipolar AlGaN-Cladding-Free Laser Diodes
• Low-Cost Zinc Oxide for High-Power-Output, GaN-Based LEDs (UC Case 2010-183)
• Low-Cost Zinc Oxide for High-Power-Output, GaN-Based LEDs (UC Case 2010-150)
• Nonpolar III-Nitride LEDs With Long Wavelength Emission
• Method for Increasing GaN Substrate Area in Nitride Devices
• Flexible Arrays of MicroLEDs using the Photoelectrochemical (PEC) Liftoff Technique
• Optimization of Laser Bar Orientation for Nonpolar Laser Diodes
• UV Optoelectronic Devices Based on Nonpolar and Semi-polar AlInN and AlInGaN Alloys
• Low-Droop LED Structure on GaN Semi-polar Substrates
• Improved Fabrication of Nonpolar InGaN Thin Films, Heterostructures, and Devices
• Growth of High-Performance M-plane GaN Optical Devices
• Method for Enhancing Growth of Semipolar Nitride Devices
• Transparent Mirrorless (TML) LEDs
• Solid Solution Phosphors for Use in Solid State White Lighting Applications
• Technique for the Nitride Growth of Semipolar Thin Films, Heterostructures, and Semiconductor Devices
• Planar, Nonpolar M-Plane III-Nitride Films Grown on Miscut Substrates
• High-Efficiency, Mirrorless Non-Polar and Semi-Polar Light Emitting Devices
• High Light Extraction Efficiency III-Nitride LED
• Tunable White Light Based on Polarization-Sensitive LEDs
• Method for Improved Surface of (Ga,Al,In,B)N Films on Nonpolar or Semipolar Subtrates
• Improved Anisotropic Strain Control in Semipolar Nitride Devices
• III-Nitride Tunnel Junction with Modified Interface
• Enhanced Light Extraction LED with a Tunnel Junction Contact Wafer Bonded to a Conductive Oxide
• Increased Light Extraction with Multistep Deposition of ZnO on GaN
• Hybrid Growth Method for Improved III-Nitride Tunnel Junction Devices
• Contact Architectures for Tunnel Junction Devices
• New Blue Phosphor for High Heat Applications
• Internal Heating for Ammonothermal Growth of Group-III Nitride Crystals
• Methods for Fabricating III-Nitride Tunnel Junction Devices
• Multifaceted III-Nitride Surface-Emitting Laser
• Laser Diode System For Horticultural Lighting
• Fabricating Nitride Layers
• Reduction in Leakage Current and Increase in Efficiency of III-Nitride MicroLEDS
• Vertical Cavity Surface-Emitting Lasers with Continuous Wave Operation
• Laser Lighting System Incorporating an Additional Scattered Laser

Tech ID/UC Case

21919/2006-678-0

Related Cases

2006-678-0

*Abstract

A method for growing an improved quality device by depositing a low temperature magnesium doped nitride semiconductor thin film.

*IP Issue Date

May 4, 2010

*Principal Investigator

Name: Steven DenBaars

Department:

Name: Michael Iza

Department:

Name: Shuji Nakamura

Department:

Name: Hitoshi Sato

Department:

Country/Region

USA