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SemiLeds Corporation (LEDS)

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Last Post: 8/22/2019 12:02:11 PM - Followers: 25 - Board type: Free - Posts Today: 0



SemiLEDs was incorporated in Delaware in January 2005. SemiLEDs is a manufacturer of ultra-high brightness LED chips with state of the art fabrication facilities in Hsinchu Science Park, Taiwan. SemiLEDs specializes in the development and manufacturing of metal alloy vertical LED chips in blue (white), green and UV using our patented and proprietary MvpLED™ technology. This unique design allows for higher performance and longer lumen maintenance.

SemiLEDs is fully ISO9001 Certified.

SemiLEDs portfolio of products along with partner enabled packages based on SemiLEDs chips, offer a strong value proposition to LED users in various industry segments. SemiLEDs patented and unique vertical LEDs are metal alloy devices which provide advantages in design and value that are unparalleled in the industry.

SemiLEDs' Metal Vertical Photon Light Emitting Diode (MvpLED™) devices fabricated using SemiLEDs' proprietary and patented process technologies, are the next generation High Power LEDs for advanced applications, including solid state lighting. MvpLED™ chips use an advanced metal alloy process, thus have excellent thermal and electrical conductivity, allowing the MvpLED chips to operate under extreme conditions that are not suitable for conventional InGaN LEDs on sapphire or SiC. SemiLEDs' MvpLED™ devices are fabricated with thinned n-GaN up structure (patented) to enhance light output efficiency and maximize the vertical injection of current into the device active layers. With the vertical structure and ultra-thin GaN, MvpLED™ devices exhibit a nearly perfect Lambertian light emission pattern. MvpLED's™ patented metal alloy processes are also the best solutions for both high performance and excellent reliability. The MvpLED™ chip is designed to maximize the effective emitting area to meet the light pattern requirements of high power chips.


General Lighting

Throughout human history, developments in lighting technologies have brought about profound pragmatic shifts in human behavior. From the oil lamps of ancient Egypt, to the candles of the Bronze Age, to Edison's light-bulb and its ensuing technologies such as the fluorescent tube; new lighting technologies have enabled new human capabilities and changed the way we live.

We stand once again at the dawn of a new era in lighting technology that is sure to change our expectations and capabilities in more dramatic ways than ever before.  

The Light Emitting Diode (LED) reduces our energy consumption by up to 90%, is cold to the touch, has no glass or harmful chemicals, and practically lasts forever. The era of changing light bulbs is over.

SemiLEDs manufactures some of the most efficient and reliable LEDs in the world. Our award winning patented technology features the most efficient LED chip design. Having SemiLEDs LEDs in your LED lighting system is your best guarantee for maximizing the advantages of your LED system.

The innate advantages of SemiLEDs' unique technology provide the ideal building blocks for lighting manufacturers looking to meet new energy and environmental criteria. 

Highlights of LED advantages:

·             Efficiency - presently over 120 Lumens/Watt and on their way to 250 Lumens/Watt

·             Visual appeal - Saturated vivid colors without the use of filters

·             Install and Forget - Up to 100,000 hours with virtually no maintenance

·             Compact form factor - Design flexibility and enabling new applications and designs

·             Cool to the touch - for Heat-Sensitive Environments

·             Safety - Low-voltage operation enables Off Grid Lighting /Solar/Battery-Powered Applications

·             Robustness - Perfect for harsh environments and Outdoor Applications

·             Vibration Resistance - Ideal for Automotive, Transportation and Aircraft Lighting as well as Task lights

·             UV and IR free - LED white lights have no Infrared and Ultraviolet radiation

·             Cold-Temperature Operation - Replacing CFL, Fluorescent, Metal Halide / HPS apps in cold countries or environments

LED Chips

SemiLEDs MvpLED chips are metal alloy devices which are made using a patented process entailing a vertical structure. This unique approach provides superior performance at various levels.

  • Thermal benefits: The thermal benefits enable better thermal designs, light color consistency, better lifetime and reliability
  • Efficiency benefits: The vertical structure and copper alloy p-pad, enable lower forward voltages, and better current spreading that make for better overall efficiency
  • Optical benefits: The light extraction layer and the thin structure provide a directional light output with a Lambertian pattern enabling better optical coupling and maximizing usable light

SemiLEDs chips also feature:

  • Best of breed Brightness and Reliability
  • Patented structure
  • Silver epoxy die attach compatibility (140µm high p-n junction)
  • Thin chip - 145µm
  • Available with SnCu eutectic solder
  • RoHS compliant

Quality by Design

The advantages of the patented and proprietary MvpLED™ design especially in Thermal management, and Optical efficacy, are realized in light quality, lifetime, color consistency, reliability and overall efficiency of the luminaire. Available in Blue, Green and Ultraviolet (UV), SemiLEDs high efficiency chips bring real benefits to any lamp or luminaire manufacturer.


Thermal Advantages:

Among pure metals at room temperature, copper has the second highest electrical and thermal conductivity after silver. Furthermore, due to the high thermal conductivity of the copper alloy layer, the heat generated in our device is effectively conducted. This is a major advantage for any lamp or luminaire manufacturer. No matter how good a thermal design is if the contact material to the junction is a poor conductor then the cooling effects of the heat-sink are significantly reduced.

Greenest LEDs

Most LEDs are built on Sapphire wafers. On average, more than 200 kWh of electricity are spent on making a 2 inch Sapphire wafer; a significant environmental burden.

Other manufacturers dice the LEDs without removing the Sapphire. Sapphire is a less effective conductor of heat acting as a bottleneck for heat transfer from the junction to the heat-sink. The Sapphire wafer is also lost.

SemiLEDs' patented and unique process consumes no Sapphire, significantly reducing the Carbon footprint. The lack of Sapphire also removes a thermal management bottleneck while providing the most environmentally friendly LED on the market.


Reliability and consistency are extremely important characteristics of an LED. Any designer looking to design an LED into a lighting system should consider not only how the LED will perform on hour 1 but also on hour 1k, 10k and 100k.

It is evident that most LED deterioration is due to poor thermal management. Excessive heat at the junction can damage the crystal quality, the bond pads, and even alter the chemistry of a Phosphor or an encapsulant material thus making it less transparent. As a general rule of thumb, the more efficiently you can drive heat away from an LED, the more consistent and more reliable your lighting system will be.

SemiLEDs patented MvpLEDTM design maximizes the efficacy of any thermal management system by maximizing the heat transfer rate from the junction to the LED package. Many thermal designs are very good however if the material on which the LED structure is built is a poor conductor of heat, such as Sapphire or Silicon, then the overall efficacy of the system is in question. SemiLEDs uses copper alloy, an excellent conductor of heat, thus eliminating the bottleneck effect.

The effects of SemiLEDs efficient Copper alloy devices can be felt in the lifetime and light quality of packaged chips producing white light. Packages using SemiLEDs LEDs, as opposed to conventional Sapphire LEDs, maintain initial CCT values over time. Packages using Sapphire LEDs experienced a CCT shift of more than 20% towards the blue end of the spectrum, while packages using SemiLEDs LEDs only experienced a CCT shift of 2%. This is due to the heat effects on the phosphor chemistry.


MvpLED™ Chips Type Size Min Power Output Max Power Output Input Current Typ. Vf Wavelength
SL-V-B15AA Chip 400μm x 400μm 17mW 35mW 20mA 3.2V 450nm-475nm
SL-V-B24AD Chip 610μm x 610μm 120mW 250mW 150mA 3.3V 450nm-475nm
SL-V-B28AD Chip 720μm x 720μm 200mW 400mW 350mA 3.5V 450nm-475nm
SL-V-B35AD Chip 860μm x 860μm 240mW 450mW 350mA 3.4V 450nm-475nm
SL-V-B40AC Chip 1070μm x 1070μm 290mW 550mW 350mA 3.2V 450nm-475nm
SL-V-B40AC2 Chip 1070μm x 1070μm 600mW 900mW 700mA 3.6V 450nm-475nm
SL-M-B40AC Chip 1070μm x 1070μm 350mW 550mW 350mA 3.1V 450nm-475nm
SL-V-B45AC Chip 1200μm x 1200μm 400mW 600mW 350mA 3.2V 450nm-475nm
SL-V-B45AC2 Chip 1200μm x 1200μm 800mW 1000mW+ 700mA 3.5V 450nm-475nm
SL-M-B45AC Chip 1200μm x 1200μm 400mW 550mW+ 350mA 3.1V 450nm-475nm
SL-V-B40AK Chip 1070μm x 1070μm 350mW 600mW 350mA 3.2V 450nm-475nm
SL-V-B45AK Chip 1200μm x 1200μm 400mW 600mW 350mA 3.2V 450nm-475nm
SL-V-B45AK Chip 1200μm x 1200μm 300mW 600mW 350mA 3.2V 450nm-475nm
SL-V-B60AC Chip 1520μm x 1520μm 700mW 1100mW+ 700mA 3.3V 450nm-475nm
MvpLED™ Chips Type Size Min Power Output Max Power Output Input Current Typ. Vf Wavelength
SL-V-U15AA Chip 380μm x 380μm 8mW 25mW 20mA 3.3V 395nm-420nm
SL-V-U40AC Chip 1070μm x 1070μm 36mW 450mW 350mA 3.3V 375nm-420nm
SL-V-U45ACD Chip 1200μm x 1200μm 30mW 150mW 350mA 3.7V 360nm-375nm
S50N-U Package 5mm x 5mm (Typ.Power Output :  150mW) 700mA 3.8V 365nm-370nm
MvpLED™ Chips Type Size Min Power Output Max Power Output Input Current Typ. Vf Wavelength
SL-V-G15AA Chip 400μm x 400μm 0.4cd 1.4cd 20mA 3.2V 500nm-535nm
SL-V-G40AC Chip 1070μm x 1070μm 10cd 20cd 350mA 3.3V 500nm-535nm

Environmental Policy

SemiLEDs products, infrastructure and processes are designed to minimize the impact on the environment. This environmental awareness is driven through our organization from the top down and is prevalent at every level of the organization. 

RoHS - RoHS is the acronym for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products. All applicable products in the EU market after July 1, 2006 must pass RoHS compliance.

REACH - REACH is a new European Community Regulation on chemicals and their safe use (EC 1907/2006). It deals with the Registration, Evaluation, Authorisation and Restriction of Chemical substances. The new law entered into force on 1 June 2007

Executive Officers

Trung T. Doan

Trung T. Doan has served as Chairman of our board of directors and our Chief Executive Officer since January 2005. Prior to joining SemiLEDs, Mr. Doan served as Corporate Vice President of Applied Global Services (AGS) Product group at Applied Materials, Inc., and also served as President and Chief Executive Officer of Jusung Engineering, Inc., a major semiconductor/LCD equipment company in Korea. In addition, Mr. Doan held the Vice President position of Process Development at Micron Technology Inc. Mr. Doan currently serves on the Board of Directors of Advanced Energy Industries, a publicly held manufacturer of power conversion and control systems, and Dolsoft Corporation, a private held software company. Previously, Mr. Doan served as a director of Nu Tool Inc., a semiconductor technology company, and as a director of EMCO, a publicly held manufacturer of advanced flow control devices and systems. Mr. Doan holds a bachelors degree in nuclear engineering from the University of California, Santa Barbara, where he graduated with honors, and a masters of science degree in chemical engineering from the University of California, Santa Barbara.

Dr. Anh Chuong Tran

Dr. Anh Chuong Tran has served as President, Chief Operating Officer and a director of our company since January 2005. Dr. Tran served as the Vice President of Highlink Technology Corporation from November 2000 to November 2004 and the senior staff scientist of Emcore Corporation from 1995 to February 2000. Dr. Tran holds a bachelor of science degree in physics from the Czech Technical University, and a doctor of philosophy in physics from the University of Montreal.

David Young

David Young has served as our Chief Financial Officer since March 2008. Prior to joining us, Mr. Young served as Vice President, Sourcing Administration, of Payless ShoeSource International Ltd. from October 2005 to February 2008, co-founder and executive vice president of Tera Xtal Technology Corporation, chief financial officer of Sparkice.com Inc. and chief financial officer of Young Brothers Development Co., Ltd. from 1996 to 1999. Mr. Young also served as audit manager at Arthur Anderson from 1993 to 1995 and as audit manager and audit senior at Ernst & Young from 1987 to 1993. Mr. Young holds a bachelor of arts degree in economics and business from the University of California, Los Angeles.

Current Price
Bid Ask Day's Range
  • 1D
  • 1M
  • 2M
  • 3M
  • 6M
  • 1Y
  • 2Y
  • 3Y
  • 5Y
LEDS News: Statement of Changes in Beneficial Ownership (4) 09/06/2019 07:17:18 AM
LEDS News: Statement of Changes in Beneficial Ownership (4) 09/06/2019 07:08:42 AM
LEDS News: Statement of Changes in Beneficial Ownership (4) 09/06/2019 06:55:26 AM
LEDS News: Current Report Filing (8-k) 09/06/2019 06:39:05 AM
LEDS News: Initial Statement of Beneficial Ownership (3) 09/06/2019 06:29:44 AM
#349   I think I`m going to take a starter dirtydozen911 08/22/19 12:02:10 PM
#348   * * $LEDS Video Chart 08-21-2019 * * ClayTrader 08/21/19 05:46:21 PM
#347   XAN CHANG MA...may be buying on the open dirtydozen911 08/21/19 11:46:49 AM
#346   On August 17, 2019, SemiLEDs Corporation (the “Company”) [SMART MONEY] 08/21/19 10:07:00 AM
#345   Yes should be good reading today!!! Eng62 07/10/19 09:26:36 AM
#344   News: $LEDS SemiLEDs to Announce Fiscal Third Quarter whytestocks 07/08/19 04:40:21 PM
#343   Semiflatten Corp. willlbone 04/12/19 11:52:39 AM
#342   News: $LEDS SemiLEDs to Announce Fiscal Second Quarter whytestocks 04/08/19 04:20:50 PM
#341   Let’s go leds I am still loaded 3,70´s europtiger 08/21/18 01:57:45 PM
#340   Great!! This will move up soon. GL investor86 08/10/18 09:52:19 AM
#339   Got some more 4,10‘s today... have to many europtiger 08/10/18 09:50:49 AM
#338   Possible.. investor86 08/10/18 09:02:23 AM
#337   Move starting europtiger 08/09/18 10:40:10 AM
#336   Time to get a few .... maybe takes europtiger 08/07/18 02:23:09 PM
#335   Time to collect imo europtiger 08/07/18 02:22:41 PM
#334   Collecting leds between 3,60&3,90 for next pop europtiger 08/07/18 02:17:52 PM
#333   Very positive news and this drops like a investor86 07/12/18 10:47:36 AM
#332   Yep, float here is aamazing. investor86 07/12/18 10:42:35 AM
#331   No worries 850k float ... they will cover soon stock1ace1 07/12/18 10:41:44 AM
#330   Sucks big time. investor86 07/12/18 10:40:32 AM
#329   Buying 4.30s stock1ace1 07/12/18 10:37:25 AM
#328   Shorts working the bid/ask stock1ace1 07/12/18 10:37:06 AM
#327   Now it does like 40 minutes later lol. investor86 07/12/18 08:01:37 AM
#326   Strange. Shorts on ask trying to scare people stock1ace1 07/12/18 07:56:45 AM
#325   Grabbed some here but volume is not showing investor86 07/12/18 07:55:00 AM
#324   Last Earnings they gapped it to 9$ and stock1ace1 07/12/18 07:16:50 AM
#323   850k Float+ big Earnings Out A/H very nice stock1ace1 07/12/18 06:59:59 AM
#322   * * $LEDS Video Chart 07-09-18 * * ClayTrader 07/09/18 05:09:45 PM
#321   * * $LEDS Video Chart 05-01-18 * * ClayTrader 05/01/18 05:12:05 PM
#320   * * $LEDS Video Chart 04-24-18 * * ClayTrader 04/24/18 05:15:21 PM
#319   hold. aristotelisonassis 04/24/18 02:24:11 PM
#318   Long 4,28 europtiger 04/24/18 02:16:20 PM
#317   long at $3.87 aristotelisonassis 04/24/18 10:18:25 AM
#316   Q2 earnings AH Discipline15 04/12/18 12:01:45 PM
#315   Got more 5,90's Stop 5,35 europtiger 04/11/18 11:13:52 AM
#314   Got 5,70's as a starter europtiger 04/11/18 10:52:35 AM
#313   Could be soon a rebuy... or the fill europtiger 04/11/18 10:10:42 AM
#312   Today is payday europtiger 04/11/18 09:41:13 AM
#311   With this float we Could see a Mega squeeeze europtiger 04/11/18 09:40:27 AM
#310   WTH T695 04/11/18 09:39:49 AM
#309   Weeeee europtiger 04/11/18 09:39:25 AM
#308   Well we closed about the $5 resistance mark. Scootter82 01/18/18 06:03:20 PM
#307   Did Miss It to sell lol But i Keep Holding europtiger 01/18/18 11:19:42 AM
#306   On a run today. Scootter82 01/18/18 09:59:57 AM
#305   Looking better europtiger 01/17/18 01:18:09 PM
#304   Yes i Keep on buying here and there europtiger 01/16/18 01:56:19 PM
#303   Chart says there's a good chance for positive Scootter82 01/16/18 01:33:13 PM
#302   Got me more today... have a feeling this europtiger 01/11/18 09:59:26 AM
#301   Yes it is and i am still in europtiger 01/10/18 05:46:35 PM
#300   Was able to sale my initial investment at Scootter82 01/10/18 04:40:13 PM