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Micro UV-LED related patents were granted in Europe and US

We are pleased to inform you that the patents on high efficiency technology for micro UV-LEDs were granted in the United Kingdom, Germany, and France on September 8 (local time), and in the United States on October 5 (local time).

We are one of the earliest founders in the UV-LED industry. We succeeded in developing the world's first high-efficiency UV-LED in collaboration with Professor Emeritus Shiro Sakai of the University of Tokushima in 2000, and since then, we are a pioneer company of UV-LED that manufactures and sells UV-LED products. We have invested heavily in the development and improvement of UV-LEDs, which have been extremely difficult.

Regarding the patented technology that was established this time, micro LED displays are being actively developed by various companies, including Apple Inc., as next-generation display technologies, following organic EL displays, which have problems with durability. Conventional red, blue, and green LEDs have different light wavelengths, so the compound differs depending on the color, and not only the electrical characteristics differ, but also the reaction speed and deterioration characteristics make it difficult to control the display. In addition, since the band gap of the red LED is narrow, the electrical characteristics deteriorate due to micronization. Furthermore, since the material is brittle, it is difficult to reduce the size to 50 microns or less, and each company is working on development.

This patented technology improves luminous efficiency in micro LED chips with wavelengths of 385 to 400 nm by reducing the chip size to 50 μ m or less, mainly using a superlattice structure, and using a patterned sapphire substrate (PSS). Unlike LEDs of other colors whose luminous efficiency decreases due to micro-sizing, this patent suppresses the decrease in efficiency.
   ○ European application (UK, Germany, France)
       September 8, 2021 Patent certificate issued (patent date)
       Application number: 19185578.2
       Patent number: 3644379
   ○ American application
       October 5, 2021 Patent certificate issued (patent date)
       Application number: 16 / 509,053
       Patent number: 11,139,342

Micro UV-LED can obtain full color by exciting red, blue and green phosphors. It is difficult and time-consuming to mount LED chips as small as wheat flour, which are 20 to 30 microns in size, on a TFT display board. By unifying the LED chips from three types of red, blue, and green to one type of UV-LED, not only mounting is easy, but also current and voltage control is easy. Although it was said that the luminous efficiency of UV-LED was low, this high efficiency technology may greatly improve the feasibility of micro LED display.

We regard intellectual property rights such as our patent rights as extremely important management assets, and we will take decisive measures around the world for acts that infringe or may infringe our intellectual property rights.

Japanese Journal of Applyed Physics (JJAP) invited our papers have been published.


Nitride Semiconductors Has Entered into Settlement and License Agreement Relating to UV-LED Patent Infringement Lawsuit in USA

Nitride Semiconductors Co., Ltd. (“Nitride”), a pioneer of ultraviolet light emitting diode (UV-LED) technology, has filed complaints against Digi-Key Corporation, a global electrical components distributor, in the U.S. District Court for the District of Minnesota, asserting infringement of Nitride’s UV-LED patent. In the complaints, Nitride is asserting that UV-LED products being supplied by various LED companies - such as American Opto Plus LED Corp., Crystal IS Inc., Kingbright Electronic Co., Ltd., Luminus Device, and QT-Brightek Corp. - have been infringing Nitride’s UV-LED patent.
Further, Nitride has filed a complaint against Lite-On Technology Corporation and its affiliates in the U.S. District Court for the Western District of Texas, asserting infringement of Nitride’s UV-LED patent.

On June 18, 2021, in relation to the above-mentioned lawsuits, Nitride has entered into a settlement and patent license agreement with QT-Brightek Corp. (headquartered in California) which provides that QT-Brightek Corp. does not dispute that its UV-LEDs infringe, and QT-Brightek Corp. has also agreed to respect Nitride’s patent.
As for other UV LED makers’ products, Nitride continues to pursue patent litigations in the Minnesota and Texas court.

Nitride is one of the earliest ground breakers in the field of UV-LEDs. With Professor Emeritus Shiro SAKAI at Tokushima University, Nitride succeeded in developing highly efficient UV-LEDs as early as 2000. This was the first time in the world such a breakthrough in UV LED technology had been achieved. Nitride has continued to manufacture and sell UV-LEDs thereafter, and has invested enormously in R&D to develop and enhance its UV-LED technology.

To protect its UV-LED patented technology, Nitride initiated its patent enforcement campaign starting in 2017. By virtue of such efforts, a judgment was issued out of the U.S. District Court for the Northern District of California in favor of Nitride and against RayVio Corporation (“Rayvio”) in 2020, who infringed Nitride’s UV-LED patent. That judgment was also in Nitride’s favor with respect to the validity of its patent. The U.S. Patent & Trademark Office has also confirmed the validity of the key claims of Nitride’s patent in its final judgment on an Inter Parte Review case filed by RayVio.

Nitride considers its intellectual property rights to be vitally important company assets. Accordingly, Nitride will take any and all action necessary to enforce its patent against infringers in any country and uphold its patents and other intellectual property rights.

New release of the micro UV-LED chip for micro LED displays.

We would like to report that we have succeeded in miniaturizing the micro UV-LED chip for micro LED displays, which is expected as a display for next-generation AR glasses and smart glasses, and developing mass production technology.

◇ Background

Micro LED displays are the next-generation displays for liquid crystal and organic LED displays, and are being developed by Apple Inc. of the United States and other companies in various countries. The red, blue, and green micro LED chips that these companies are working on are being developed. With the applied method, it is difficult to miniaturize the red LED chip to 50 μm or less, and the development is delayed. Our group is proceeding with the development of displays by using micro-ultraviolet (hereinafter UV) LEDs to excite red, blue, and green phosphors, and in putting them into practical use, the cost of micro UV-LED chips can be reduced. It was an issue.

◇ Summary

We have been working on the development of micro UV-LED chips with a wavelength of 385 nm ahead of other companies. The chip size of the conventional micro UV-LED is 16 μm x 48 μm, the chip spacing is as wide as 10 μm in the horizontal direction and 30 μm in the vertical direction, and the quantity that can be obtained from the wafer is about 3.4 million chips from the 4-inch wafer. The newly developed micro UV-LED chip has a chip size of 12 μm x 24 μm, the chip spacing is 5 μm in both the vertical and horizontal directions, and the number of chips that can be obtained from a 4-inch wafer is about 14 million chips, which is about four times as many. The cost per chip is one-fourth that of the conventional chip. In terms of electrical characteristics, we have confirmed good electrical characteristics and have made great strides toward practical application in the near future.
When making a 25 mm square size display, 300,000 micro LED chips are required, but 11 micro LED displays can be made from one wafer. (All chips are controlled by an IC driver to display a full-color screen)
Supplement: Since the particle size of edible wheat flour is 10 μm to 100 μm, it is close to the size of fine flour.

NChip size:12 μm x 24 μm, chip spacing 5 μm

Chip size:12 μm x 24 μm, chip spacing 5 μm

Light emission of micro UV-LED chip (IF:100μA, VF:3.58V)

Light emission of micro UV-LED chip (IF:100μA, VF:3.58V)

I-V characteristics

I-V characteristics

         

Nitride Semiconductors Has Filed Complaint against Lite-On, Continuing Enforcement against Infringement of its UV LED Patent

On Feb. 26, 2021 (local time), Nitride Semiconductors Co., Ltd. ("Nitride"), a pioneer of ultraviolet light emitting diode (UV LED) technology, hereby announces that, it has successfully filed a complaint against Lite-On Technology Corporation and its 3 U.S.-based affiliated companies (collectively, "Lite-On"), in the U.S. District Court for the Western District of Texas, Waco Division, asserting infringement of Nitride’s UV LED patent.

Nitride is one of the earliest ground breakers in the field of UV-LEDs. With Professor Emeritus Shiro SAKAI at Tokushima University, Nitride succeeded in developing highly efficient UV-LEDs as early as 2000. This was the first time in the world such a breakthrough in UV LED technology had been achieved. Nitride has continued to manufacture and sell UV-LEDs thereafter, and has invested enormously in R&D to develop and enhance its UV-LED technology.

To protect its UV LED patented technology, Nitride initiated its patent enforcement campaign starting in 2017.
By virtue of such efforts, a judgment was issued out of the U.S. District Court for the Northern District of California in favor of Nitride and against RayVio Corporation ("Rayvio") in 2020, who infringed Nitride's UV LED patent. That judgment was also in Nitride's favor with respect to the validity of its patent. The U.S. Patent & Trademark Office has also confirmed the validity of the key claims of Nitride's patent in its final judgment on an Inter Parte Review case filed by RayVio.
Further, the lawsuit which Nitride has filed against Digi-Key Corporation ("Digikey"), a global electrical components distributor, is pending before the U.S. District Court for the District of Minnesota. Nitride is asserting that UV LED products being supplied by various LED companies - such as American Opto Plus LED Corp., Crystal IS Inc., Lite-On Semiconductor Corp, Luminus Devices Inc., Kingbright Electronic Co., Ltd., QT-Brightek Corp. and Vishay Intertechnology Inc. - have been infringing Nitride's UV LED patent.

Nitride considers its intellectual property rights to be vitally important company assets. Accordingly, Nitride will take any and all action necessary to enforce its patent against infringers in any country and uphold its patents and other intellectual property rights.

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Nitride Semiconductors Continues Enforcement against Infringement of its UV LED Patent

On Feb. 18, 2021 (local time), Nitride Semiconductors Co., Ltd. ("Nitride"), a pioneer of ultraviolet light emitting diode (UV LED) technology, hereby announces that, it has successfully filed a complaint against Digi-Key Corporation ("Digikey"), a global electrical components distributor, in the U.S. District Court for the District of Minnesota, asserting infringement of Nitride's UV LED patent.

In the complaint, Nitride is asserting that UV LED products being supplied by various LED companies - such as American Opto Plus LED Corp., Crystal IS Inc., Kingbright Electronic Co., Ltd., and QT-Brightek Corp. - have been infringing Nitride's UV LED patent. In an earlier-filed patent litigation against Digikey, Nitride has already accused patent infringement against UV LED products of Luminus Device Inc. and Lite-On Semiconductor Corp.

Nitride is one of the earliest ground breakers in the field of UV-LEDs. With Professor Emeritus Shiro SAKAI at Tokushima University, Nitride succeeded in developing highly efficient UV-LEDs as early as 2000. This was the first time in the world such a breakthrough in UV LED technology had been achieved. Nitride has continued to manufacture and sell UV-LEDs thereafter, and has invested enormously in R&D to develop and enhance its UV-LED technology.

To protect its UV LED patented technology, Nitride initiated its patent enforcement campaign starting in 2017. By virtue of such efforts, a judgment was issued out of the U.S. District Court for the Northern District of California in favor of Nitride and against RayVio Corporation ("Rayvio") in 2020, who infringed Nitride's UV LED patent. That judgment was also in Nitride's favor with respect to the validity of its patent. The U.S. Patent & Trademark Office has also confirmed the validity of the key claims of Nitride's patent in its final judgment on an Inter Parte Review case filed by RayVio.

Nitride considers its intellectual property rights to be vitally important company assets. Accordingly, Nitride will take any and all action necessary to enforce its patent against infringers in any country and uphold its patents and other intellectual property rights.

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UV Seminar, Science Photonics Fair 2020

CEO Muramoto made an invited speech.

Date:
13th November, 2020 15:40窶骭€16:35
Venue:
Tokyo Metropolitan Industrial Trade Center, Hamamatsucho kan
Speaker:
CEO Yoshihiko Muramoto
Title:
Technology of UVC-LED and Development of Anti-virus Applications
 

Nitride Semiconductors Continues Enforcement against Infringement of its UV LED Patent

On Aug.20th, Nitride Semiconductors Co., Ltd. ("Nitride"), a pioneer of ultraviolet light emitting diode (UV LED) technology, hereby announces that, it has successfully filed an amended complaint against Digi-key Corp, a global electrical components distributor, in the U.S. District Court for the District of Minnesota, asserting infringement of Nitride's UV LED patent.


According to the amended complaint, UV LED products being supplied by various LED companies - such as Lite-On Semiconductor, Luminus Devices, and Vishay Intertechnology - are infringing Nitride's UV LED patent.


Nitride is one of the earliest ground breakers in the field of UV-LEDs. With Professor Shiro Sakai at Tokushima University, Nitride succeeded in developing highly efficient UV-LEDs as early as 2000. This was the first time in the world such a breakthrough in UV LED technology had been achieved. Nitride has continued to manufacture and sell UV-LEDs thereafter, and has invested enormously in R&D to develop and enhance its UV-LED technology.


To protect its UV LED patented technology, Nitride initiated its patent enforcement campaign starting in 2017. By virtue of such efforts, a judgment was issued out of the U.S. District Court for the Northern District of California in favor of Nitride and against RayVio Corporation ("Rayvio") in 2020, who infringed Nitride's UV LED patent. That judgment was also in Nitride's favor with respect to the validity of its patent. The U.S. Patent & Trademark Office has also confirmed the validity of the key claims of Nitride's patent in its final judgment on an Inter Parte Review case filed by RayVio.


Nitride considers its intellectual property rights to be vitally important company assets. Accordingly, Nitride will take any and all action necessary to enforce its patent against infringers in any country and uphold its patents and other intellectual property rights.

 

New Product Announcement Press Release

Summary

We are pleased to announce that we have developed the world's first UV-LED for exposure machines applied to manufacturing semiconductors and PCBs.
NS365L-9RXT

New product name: UV-LED; NS365L-9RXT


Background

UV lamps containing mercury are still used in semiconductor exposure machines, but in addition to functional restrictions such as long standby time, short lifetime, low UV illuminance stability, and inconvenient on / off control. Therefore, it is expected that the United Nations Environment Program Minamata Convention will promote switching to semiconductor (LED) light sources due to environmental issues.

Features

  • Energy saving, long life
    High efficiency, energy saving and long-life wavelength 365nm UV-LED chip is adopted, so UV output 3.2W (If: 3A, Vf: 4.6V) is demonstrated.
  • Narrow directional angle suitable for semiconductor exposure
    Parallel light is required for accurate exposure, but UV-LED light sources generally have a wide directional angle (about 120°), and the amount of light captured for exposure tends to be insufficient. Therefore, by combining a deep reflector with a lens of high UV transmittance, we have achieved a directional angle of 15° or less. This makes it possible to exchange the UV ramp light source of the conventional exposure machine with UV-LEDs instead of purchasing new UV-LED exposure machines.
  • Compact
    Size is very compact with a length of 9 mm x width of 9 mm x height of 8.5 mm, so mounting density can be increased.
  • Inexpensive
    The unit price per 10,000 mass production is around USD50.

Applications

light sources for exposure machines such as semiconductors and PCBs.
 

LED NEXT STAGE 2020

We will set up booth at LED NEXT STAGE 2020.
LED NEXT STAGE 2020 was canceled due to the spread of the Novel Coronavirus.

Date:
3-6 March, 2020 10:00窶骭€17:00
(10:00-16:30 on the last day)
Venue:
Tokyo Big Sight, Japan
Booth Number:
LD1005
Organized by:
Japan LED Association, Nikkei Inc.
 

CEO Muramoto will make a speech at Seminar Stage.
LED NEXT STAGE 2020 was canceled due to the spread of the Novel Coronavirus.

Date:
4 March, 2020 13:00窶骭€13:45
Venue
West Hall 3, Tokyo Big Sight
Speaker:
CEO Yoshihiko Muramoto
 

Nitride Semiconductor Wins UV LED Patent Lawsuits against RayVio

On Jan.27th, Nitride Semiconductor Co., Ltd. ("Nitride") announced that it won a patent infringement lawsuit against RayVio Corporation ("Rayvio"), a California UV-LED company.


On January 13, The California Northern District federal court issued a judgment in favor of Nitride, declaring that RayVio has infringed Nitride's patent and that the asserted claims of Nitride's patent are not invalid.


A one month ago, U.S. Patent Office has also confirmed the validity on the key claims of Nitride's patent in its final judgments of the Inter Parte Review case filed by RayVio.


Nitride is a pioneer in the field of UV-LED. With Professor Shiro Sakai at Tokushima University, Nitride succeeded in development of highly efficient UV-LED in 2000 for the first time in the world, and has continued to manufacture and sell UV-LED thereafter. Nitride has made a huge investment in R&D to develop and modify UV-LED, which has been quite challenging.


Nitride places its intellectual property rights as its vitally important management assets. Accordingly, Nitride will take resolute actions to against infringers in any country where appropriate and necessary to protect its patents and other intellectual property rights.


 

IR + UV EXPO 2019

We set up booth at IR + UV EXPO 2019.

Date:
24-26 April, 2019 10:00窶骭€17:00
Venue:
Pacifico Yokohama, Japan
Booth Number:
F-25
Organized by:
Japan Photonics Council

Booth

 

LIGHTING FAIR 2019

We set up booth at LIGHTING FAIR 2019.

Date:
March 5 (Tue.) to 8 (Fri.), 2019
10:00 a.m. to 5:00 p.m. (4:30 p.m. on last day only)
Venue:
Tokyo Big Sight West 1.2 Halls
Booth Number:
LF2016
Organized by:
UBM Japan Co., Ltd.

Booth

 

Care Show Japan 2019

We set up booth at Care Show Japan 2019.

Date:
23-24 January, 2019
10:00-17:00
Venue:
Tokyo Big Sight Exhibition Center, Japan
Booth Number:
D-42 (West Hall 3, 4)
Organized by:
UBM Japan Co., Ltd.

Booth

 

IWN2018

CEO Mr. Muramoto joined as a panelist in the ramp session.

Date:
November 11th to 16th, 2018
Venue:
Ishikawa Ongakudo, ANA Crowne Plaza Hotel Kanazawa, Motenashi-Dome, Kanazawa, Japan
Ramp session
title:

Nitride-based Optoelectronic Devices for Automobile Industry
Ramp session
date:

November 13th, 2018 (19:10 - 20:40)
Ramp session
venue:

ANA Crowne Plaza Hotel Kanazawa
 

The establishment of micro UV-LED chip company for micro LED display


The 79th JSAP Autumn Meeting 2018

CEO Muramoto made an invited speech.

Presentation date:
Sep. 18th, 2018 (13:30-14:00)
Venue:
Nagoya Congress Center Place 146
Speaker:
Nitride Semiconductors Co., Ltd. CEO Yoshihiko Muramoto
Title:
UV-LED will replace not only UV ramp but also visible LEDs (15.Crystal engineering)
Number:
18p-146-1
 

Nitride Filed Patent Infringement Lawsuit against Digi-Key (U.S. Electronic Component Seller) and RayVio (U.S. UV LED Manufacturer) in Tokyo

On July 12, 2018 (Japan time), Nitride Semiconductor Co., Ltd. ("Nitride") filed a patent infringement lawsuit with the Tokyo District Court against Digi-Key Corporation d/b/a Digi-Key Electronics ("Digi-Key"), which sells UV-LED products on the internet that are manufactured by RayVio Corporation ("RayVio"), a CA-based UV-LED manufacturer, and RayVio. In the complaint, Nitride is seeking injunction(including destruction of infringing products) and damages, asserting that Digi-Key and RayVio infringe Nitride's patent (JP 3,285,341, "Method for Manufacturing Gallium Nitride Compound Semiconductor") by manufacturing and selling the UV-LED products.


Based on the U.S. patent corresponding to the Japanese patent described above, on May 23, 2017 (PDT), Nitride has already filed a patent infringement lawsuit with the U.S. District Court, Northern District of California against RayVio, and on September 22, 2017 (CDT), Nitride has already filed a patent infringement lawsuit with the U.S. District Court for the District of Minnesota against Digi-Key.


Nitride is a pioneer in the field of UV-LED. With Professor Shiro Sakai at Tokushima University (Japan), Nitride succeeded in development of highly efficient UV-LED in 2000 for the first time in the world and has continued to manufacture and sell UV-LED thereafter. Nitride has made a huge investment in R&D to develop and modify UV-LED, which has been quite challenging.


Nitride places its intellectual property rights as its vitally important management assets. Accordingly, Nitride will take resolute actions to against infringers whom Nitride found so in any country where appropriate and necessary to protect its patents and other intellectual property rights.


 

Micro LED Forum 2018

CEO Muramoto made an invited speech.

Presentation date:
July 12th, 2018 (10:30-11:00)
Venue:
NTUH International Convention Center
No. 2 Xuzho Road, Zhongzheng District (100), Taipei, Taiwan
Speaker:
Nitride Semiconductors Co., Ltd. CEO Yoshihiko Muramoto
Title:
Full Color Fluorescence Patterns Excited by UV-LED Micro Chip

 

guangzhou international lighting exhibition

CEO Muramoto made an invited speech.

Date:
June 9th to 12th, 2018
Presentation date:
June 11th, 2018 (15:00)
Venue:
China Import and Export Fair Complex
No. 380 Yuejiang Zhong Road, Haizhu District, Guangzhou, China
Speaker:
Nitride Semiconductors Co., Ltd. CEO Yoshihiko Muramoto
Title:
UV-LED is changing its stage from industry to home appliances

 

IR + UV EXPO 2018

We set up booth at IR + UV EXPO 2018.

Date:
25-27 April, 2018 10:00窶骭€17:00
Venue:
Pacifico Yokohama, Japan
Booth Number:
F-25
Organized by:
Japan Photonics Council

 

LED PURE by NITRIDE

Our showroom “LED PURE by NITRIDE” was opened in Shinjuku Park Tower on 20 April, 2018.

Location:
Shinjuku Park Tower 6F, 3-7-1 Nishi Shinjuku, Shinjuku-ku, Tokyo
Open hours:
10:30 窶骭€ 19:00
Closed:
Wednesday, mid-summer and New Year's holidays

 

LED NEXT STAGE 2018

We set up booth at LED NEXT STAGE 2018.

Date:
6-9 March, 2018 10:00窶骭€17:00
(10:00-16:30 on the last day)
Venue:
Tokyo Big Sight, Tokyo
Booth Number:
LD1001 (West Hall 3/4)
Organized by:
Japan LED Association, Nikkei Inc.

booth

 

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