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Researchers Successfully Grow 2-Inch Diameter Substrate With a Lower Lattice Mismatch than Sapphire
LIGHTimes News Staff

August 12, 2014...Researchers from Fukuda Crystal Laboratory have successfully produced a crystal substrate with less lattice mismatch than sapphire. Professor Takashi Matsuoka of the Fukuda Crystal Laboratory led the group of researchers who successfully produced the new 2-inch diameter substrate ScAlMgO4 (SCAM) material. The researchers developed the new material to be used with GaN used in LEDs and laser diodes. The researchers note that the material has significantly less lattice mismatch than sapphire.

According to the researchers, the lattice mismatch of the material with GaN is down to just 1.8 percent. The researchers used the Czochralski method to grow the crystals. An an additional benefit of the material is that it can be sliced and processed into substrate wafers without need of cutting or grinding. X-ray diffraction of the C-plane cleavage of the process was used to evaluate crystal material. The half width of the material is 12.9 seconds, therefore, the crystal quality is apparently comparable to the perfect crystal of Si.

Unlike sapphire, SCAM material is ready for the epi cleavage process without cutting or grinding from the ingot. Thus, it can reduce the cost of wafer processing. Other researchers at Tohoku University successfully grew a GaN-based LED structure on the SCAM substrate at a high temperature of 1040 ℃ using MOCVD technology.

The research group hopes to proceed larger diameter, 4-inch to 6-inch SCAM substrates. The Fukuda Institute of Technology also hopes to collaborate with the domestic manufacturers to start selling 2-inch diameter crystal wafers next spring.

Vishay Semiconductor Orders Aixtron System to Produce Wider Range of IR LED Products
LIGHTimes News Staff

August 5, 2014...Vishay Semiconductor GmbH, Heilbronn, Germany has acquired an MOCVD system from Aixtron to expand its production capacity for infrared LEDs. Vishay plans to substantially expand its range infrared LED products. Aixtron delivered the system to Vishay at the end of March.

“We opted for Aixtron’s planetary reactor, as it deposits high-quality layers and offers very high production stability, long operating times, and high throughput rates. Not only that, Aixtron will support us with process expertise, thus enabling us to rapidly and efficiently expand our gallium arsenide-based infrared LED production,” said Dr. Heinz Nather, senior vice president OPTO Division at Vishay Semiconductor.

Dr. Frank Schulte, vice president of Aixtron Europe said, “We have great expectations of our ongoing cooperation with Vishay.”

Vishay Semiconductor GmbH in Heilbronn, Germany forms part of Vishay Intertechnology, Inc. of Malvern, Pennsylvania, USA, which has about 22,000 employees and sales of almost US$ 2.5 billion.

Chinese LED Manufacturer Selects Veeco MOCVD Systems for Expansion into GaN LED Market
LIGHTimes News Staff

July 31, 2014...Veeco Instruments Inc. announced that Xiamen Changelight Co., Ltd.(Changelight) has chosen Veeco to be its main equipment provider as it begins to produce gallium nitride (GaN)-based blue/green high brightness LEDs for general lighting and displays. Changelight purchased multiple TurboDisc® MaxBright® M™ GaN Metal Organic Chemical Vapor Deposition (MOCVD) systems during the second quarter of 2014. Changelight also bought a TurboDisc K475™ MOCVD system to expand its manufacturing of red, orange, and yellow (ROY) LEDs.

“In the past we have used competitive MOCVD equipment for the majority of our production of ROY LEDs,” said Professor Wang Xiangwu, general manager of Changelight. “As we make this important move into the GaN-based lighting market, we decided to switch to Veeco’s MaxBright M MOCVD system, which we believe will offer the best throughput and cost of ownership to help enable our success and growth in the general illumination market.”

According to Veeco, the MaxBright M has a compact, modular design for improved serviceability, and compared to the standard MaxBright MOCVD system it has up to 15% increased footprint efficiency. The system reportedly has more layout configuration options, which allow it to fit various fab spacing requirements. Veeco says its sub-floor storage enables more wafer starts per square foot for a lower cost of ownership.

“Changelight’s decision to purchase Veeco’s MOCVD platform for its GaN LED production reflects our ability to develop innovative manufacturing solutions with the best performance,” said Jim Jenson, senior vice president and general manager of Veeco MOCVD. “We have seen Changelight dominate the ROY market in China for some time and believe that, with our technology and its knowledge of the industry, Changelight is well positioned to successfully expand into the backlighting and general illumination market.”

Veeco Introduces Website for Buying and Selling of Pre-Owned Equipment
LIGHTimes News Staff

July 11, 2014...In a significant change to Veeco Intrument's business model, the company of Plainview, New York USA has launched the Veeco MarketPlace website, The website is an original equipment manufacturer (OEM) brokerage that helps buyers and sellers determine fair prices for pre-owned Veeco metal organic chemical vapor deposition (MOCVD), Ion Beam Etch (IBE), and physical vapor deposition (PVD) systems. The site will also offer assets from Veeco Certified Partners, such as SurplusGLOBAL, Inc., a secondary equipment supplier. All equipment posted on the website is eligible for Veeco's exclusive pre-purchase assessments and logistical support.

The site allows potential buyers to see pre-owned equipment for sale and determine whether to purchase it as-is or with Veeco services. Veeco also plans to offer equipment checks, refurbish-and-repair programs, upgrades and logistical and relocation services. Veeco says that sellers who post their pre-owned equipment on the site can get advice and assistance from its sales team to advertise and promote the equipment to a specific target market.

“The Veeco MarketPlace brings great value to both the buyer and seller,” said Guy Shechter, vice president, Veeco Certified Equipment and Services Marketing. “With this new site, sellers gain access to their targeted customers through and with OEM support, and buyers can make quick, informed decisions on prices and purchases. Once the buyer and seller agree on the fair market value for the asset, Veeco can provide valuable services and upgrades to extend the life and improve the productivity of the system.”.

Industry insiders have speculated that in addition to changing the Veeco's business model, the new website could potentially lower the costs for companies wanting to fabricate LED chips.

University of Tokyo Researchers Fabricate Red, Blue, and Green InGaN LEDs on Glass Substrates with Sputtering
LIGHTimes News Staff

June 26, 2014...Researchers from the University of Tokyo have used a sputtering method transcribing GaN LEDs on glass substrates. The new fabrication technique may eventually help reduce manufacturing costs or help develop OLED light panels. The researchers have not yet measured external quantum efficiency or luminous efficiency for any single color. The team is currently testing the internal quantum efficiency at low temperatures.
The researchers note that InGaN LEDs are limited to applications in small devices because InGaN LED fabrication involves expensive metal organic vapor phase epitaxy on single-crystal wafers. However, the researchers successfully employed sputtering, a less expensive epitaxial growth process, on large-area substrates to fabricate large-area InGaN LED displays.
The use of multilayer graphene buffer layers allowed the growth of highly c-axis-oriented GaN films even on amorphous substrates. The team fabricated blue, red, and green InGaN LEDs. The researchers believe that their method of sputtering to produce full-color LEDs on amorphous substrates could be adapted to fabricate large-area inorganic LED displays on glass substrates. Already, sputtering is frequently used in the LCD industry.

The researchers point out that advances in the glass industry can offer roll-to-roll processing of flexible glass foils. Furthermore, the team contends that a combination of these methods may lead to the development of large-area flexible inorganic devices.

Tawain LED Makers Account for More than 25% of All MOCVD Systems in Operation
LIGHTimes News Staff

June 12, 2014...Of  the 1917 MOCVD systems in operation globally as of May 2014, Taiwan-based LED makers accounted for 28.6%. Japan-based LED makers accounted for 23.8%, China-based makers  22.9%, and South Korea-based makers 14.1%, according to Digitimes Research. The MOCVD systems used to produce sapphire wafers had a total monthly capacity of 888,290 4-inch wafers. Of the sapphire wafer capacity, Taiwan-based makers accounted for 44.5%, China-based makers 34.2% and South Korea-based makers 19%, Digitimes Research noted. Digitimes Research found that Sapphire ingot makers  have a total monthly production capacity of 7.39 million mm in 2014, with 770,600mm that can be sliced into 4-inch wafers.

Comprel to Distribute Plessey GaN-on-Si LEDs
LIGHTimes News Staff

June 4, 2014...Comprel Srl, an Italian electronics distributor, has agreed to  distribute Plessey Semiconductor's gallium nitride-on-silicon  (GaN-on-Si) LEDs. Plessey reported the new distribution agreement with  Comprel, which is headquartered in Nova, Milanese. Plessey says the agreement  will help the company expand its European distribution with coverage in the  Italian market for its GaN-on-Si LED products. Plessey’s MaGIC™  (Manufactured on GaN-on-Si I/C) High Brightness LED (HBLED) technology  is renowned for its ability to cut LED lighting costs using standard silicon manufacturing techniques.

 Michele Busnelli, Commercial Managing Director of Comprel, said,  “Comprel is very happy to be a partner of Plessey Semiconductors." Busnell added, "The GaN-on-Si  technology is going to be a revolution in the SSL market. I am sure that  with the innovative products of Plessey and our deep knowledge of the  market we are going to be very successful.”

 David Owen, Plessey’s Regional Sales Director, said, “Comprel has a  dedicated team working in the Italian lighting market place which will  accelerate the time to market for Plessey GaN-on-Si LEDs in this high  growth region.”

New 3M LED Chip Packaging Substrate Provides Economical Substitute for Ceramic
LIGHTimes News Staff

June 2, 2014...3M Electronics Materials Solutions Division in Austin, Texas, launched its new LED Chip Packaging Substrate that provides a cost-effective alternative to ceramic substrates. The company says that the new substrate, which combines copper and polyimide,  can meet the thermal and electrical performance that high-power LED chips need at a competitive price compared to ceramic substrates. The substrate comes either in a tray or reel format. According to the company, the reel format will help the industry evolve to reel-to-reel manufacturing that is expected to lower manufacturing cost. The company will showcase the chip packaging substrate at Lightfair International, June 3-5, 2014 in Las Vegas, NV at the 3M booth (# 4821).
The LED chip can sit directly on top of a large conduit area, which a polyimide frame holds without adhesives. 3M says that substrate assembly does not require adhesives. Therefore, the substrate can be used at higher temperatures. The substrate can also reportedly work with wire bond and flip chip connections.
“LED chip manufacturers now have an alternative to ceramic substrates,” said Terry Noronha, global business manager, 3M Electronics Materials Solutions Division. “3M has harnessed more than 40 years in the circuit industry and 50 years in light management to find a new way to move the LED lighting industry forward. Not only does the 3M substrate meet LED requirements at reduced cost, but it enables reel-to-reel manufacturing with precision engineering – what we believe to be the future of efficient high-volume manufacturing.”

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