UCSB and Mitsubishi Chemical Develop Violet Non-polar LDs Comparable to C-plane LDs
CompoundSemi News StaffJuly 23, 2012...The University of California Santa Barbara (UCSB) and Mitsubishi Chemical Corp report having developed violet non-polar laser diodes that are comparable to C-plane laser diodes. Specifically they developed aluminum gallium nitride (AlGaN) cladding-free (ACF) m-plane, nitride semiconductor laser diodes (LDs). The researchers assert in an article in Applied Physics Letters that theses LDs have output powers comparable to single-stripe emitter c-plane devices.
Non-polar and semi-polar nitride crystal orientations can eliminate, reduce, or change the polarization electric fields arising in c-plane materials and active light emitting layers in nitride semiconductor devices. Cladding layers in laser diodes confine the electromagnetic field and create the conditions for stimulated emission. While AlGaN is often used for this, it has a large lattice mismatch with InGaN/GaN structures, and is difficult to grow with sufficient quality.
The researchers used separate-confinement heterostructures of InGaN or GaN and thicker InGaN quantum well regions to leverage their cladding-free technology that expanded the optical field distribution of the transverse mode. In theory such devices could be more resistant to sudden failure or gradual degradation, and allow higher-power operation.
MOCVD was used to grow a five-period mulitquantum well structure of InGaN with GaN barriers on a GaN substrate from Mitsubishi Chemical. Simulations suggest that the device should have a transverse confinement factor in the active region (Γact) of 0.128 at a lasing wavelength of 410nm (violet).
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July 23, 2012...Genesis Photonics of Taiwan reportedly plans o invest US$35 million in 2012 in China to construct its plant in Kunshan, southern China. The plant is expected to be completed in the third quarter. Genesis Photonics produces blue, green, and white LEDs.
The plant is a joint venture between Genesis and the Kunshan municipal government, according to a Digitimes article. Construction on the plant began in September 2010 with about US$200 million investment. Genesis will provide 49% of the funding and the municipal government will provide 51%.
Company chairman David Chung said that Genesis will provide technologies and management, and the municipal government is offering government resources and assist in business development. The plant will procure 2-inch MOCVD equipment and expects to have a monthly capacity of 20,000-30,000 epitaxial wafers as commercial production begins.
According to the Genesis Photonics, in the future, the company will have three production facilities in Greater China: Tainan, Dongguan, and Kunshan. The Tainan plant will focus on R&D and sales to international customers.
Chung says he plans to have the two China-based plants be completely responsible for supplying LED chips to China before 2015. SoloPower's Modules Certified to UL and IEC Standards
CompoundSemi News StaffJuly 16, 2012...SoloPower, a San Jose, California-based manufacturer of flexible thin-film solar cells and modules, has received UL and IEC certification for its next-generation SF1, SP1, and SP3L SoloPanels, the company announced. The company's remaining module, the SP3S SoloPanel, has been certified to UL standards, and certification to IEC standards is expected soon. The SF1 and SP1 SoloPanels are optimized for twelve-inch and sixteen-inch standing-seam metal roof integration. The SP3L and SP3S SoloPanels are optimized for commercial and industrial low-slope building applications.
SoloPower's new suite of solar solutions comes with a choice of non-penetrating installation kits: the SoloSaddle(TM), SoloEdge(TM), or the SoloBridge(TM). The company claims that these installation kits help maximize module performance across rooftops and geographies. The SoloSaddle integrates the SP3S into membrane-based roofing systems. Its low-slope curve provides self-cleaning and high performance in hot climates. The SoloEdge integrates the SP3L into membrane based roofing systems, and its five-degree slope provides self-cleaning and high performance in cold climates. The SoloBridge integrates the SP3L into metal roofing systems.
"Certification to UL and IEC standards for our SoloPanels is a testament to the outstanding work of our technology team, which has a proven track record of industry firsts for flexible CIGS modules," said Tim Harris, CEO, SoloPower. "It represents another step towards our goal of making solar the main source of energy for commercial and industrial buildings worldwide." Javelin Semiconductor PAs Shipping in Samsung Galaxy Appeal
CompoundSemi News StaffJuly 16, 2012...Javelin Semiconductor, Inc., announced that Samsung is shipping Javelin's PA in the new Galaxy Appeal for AT&T. The Galaxy Appeal is an affordable Android-based 3G smartphone featuring a 3.2 inch touchscreen, 800 MHz processor, side-slider QWERTY keyboard, 3 megapixel camera, Bluetooth, GPS and Wi-Fi.
"Javelin's proven monolithic CMOS PA technology is now shipping in numerous handsets," said Brad Fluke, president and chief executive officer of Javelin. "The JAV550X PA family is in full production supporting the most popular 3G bands for worldwide coverage. Javelin's innovative solution brings both performance and cost benefits to handset manufacturers."
Javelin says its PAs deliver high efficiency across the wide range of required output power levels to extend handset battery life. Additionally the company claims that the PA with integrated filtering and superior noise performance can eliminate the cost of transmit surface acoustic wave (SAW) filters, enhance wireless receiver sensitivity and improve overall smartphone performance by minimizing interference with wireless radios such as Bluetooth, GPS and Wi-Fi.
InfiniLED Announces Access Agreement with Tyndall National Institute
LIGHTimes News StaffJuly 16, 2012...InfiniLED, a portfolio company of ScienceWorks Ventures plc and a Tyndall National Institute (UCC) spin-out, announced an access agreement with Tyndall National Institute, Cork. The access agreement allows InfiniLED’s engineers to work within the institute’s ISO 9001 Certified Compound Semiconductor cleanrooms to fabricate InfiniLED's μLEDTM (MicroLED) technology. InfiniLED develops a range of LED light source modules based on its patented μLEDTM (MicroLED) technology, which it has licensed from Tyndall.
“The availability of wafer growth, chip fabrication and advanced photonic packaging & test facilities at the Tyndall National Institute allows InfiniLED to develop devices from raw materials to full systems without incurring the cost of acquiring such equipment and facilities itself. It means that InfiniLED can provide a range of solutions to customers based on μLEDTM (MicroLED) technology in a form that is most suited to their requirements,” commented Joe O’Keeffe, CEO of InfiniLED. Content continues for LIGHTimes SecondPage members... Emcore Corporation Solar Cells Power 100th Successfully Launched Satellite
CompoundSemi News StaffJuly 9, 2012...Emcore Corporation of Albuquerque, New Mexico USA, announced that it recently achieved the company's 100th successful satellite launch and deployment with primary power from Emcore solar cells or solar panels. The company produces multi-junction, gallium arsenide-based solar cells that are radiation hardened for spacecraft installation. Emcore solar cells boast a beginning-of-life (BOL) conversion efficiency nearing 30% and the option for a patented, onboard monolithic bypass diode.
In June, the 100th on-orbit spacecraft powered by Emcore's solar equipment was launched. Space Systems/Loral built the spacecraft equipped with Emcore's high-efficiency multi-junction solar cells. Emcore says that the satellite will provide C- and Ku-band capacity for a variety of communications services.
"Completing 100 successful satellite launches is a tremendous milestone for Emcore and our space satellite solar business," said Christopher Larocca, COO for Emcore. "We are especially proud to have achieved this milestone with zero on-orbit failures. Emcore currently has a total of 120 more satellites under contract to be launched and powered by Emcore solar equipment over the next several years. We look forward to continued success in this segment by delivering innovative, high-performance solar technology to the satellite power market." Aixtron Concludes "TECHNOTUBES" Project; Launches New BM 300T Carbon Nanotubes System
CompoundSemi News StaffJuly 9, 2012...Aixtron SE of Aachen, Germany demonstrated its new BM 300T carbon nanotube growth system at the conclusion of the European Commission-funded “TECHNOTUBES” (Technology for Wafer-Scale Carbon Nanotubes) project. The 3-year project was to develop growth processes, automated equipment, quality control/monitoring and a variety of end-applications based on carbon nanotubes. The members of the project consortium included the University of Cambridge (coordinator), ETH Zurich, TU Denmark, TU Berlin, Fritz Haber Institute, CNR-Italy, Philips, THALES, IMEC, and Aixtron.
Prof. John Robertson, the project coordinator from the University of Cambridge, commented, “This unique project brings together world-class partners from industry and research to create a carbon nanotube value chain, from growth equipment to material production to exploitable devices. The key applications that emerged from this project include interconnects, thermal interface materials, medical and security X-ray sources, gas detectors, biological probes, microfluidics and novel energy storage devices.”
Dr. Ken Teo, Director of Nanoinstruments added, “Our role at Aixtron was to create a system capable of depositing various carbon nanotube structures that met the requirements of these applications. The challenge was to integrate various processes (single-wall, multi-wall, straight vertical nanotubes) into a single platform offering the uniformity, repeatability and a high degree of automation that industrial production partners demand. The BM 300T system we have developed successfully achieves these goals by enabling high throughput, wafer-scale carbon nanotube production, incorporating thermal and plasma deposition, precursor activation and a novel wafer loading and heating system.”
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