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Features


Monday 27th October 2008
Veeco's GEN10 features automation and the capability to grow incompatible materials, such as nitrides and oxides. Richard Stevenson quizzes the company's MBE product manager, Andy Harkison, about the merits of the new tool.
Monday 20th October 2008
Security services could get a massive boost from cadmium-based detectors that can identify plastic explosives in a suitcase's contents. Although it's tricky to make these II-VIs, a novel deposition tool and growth on GaAs offer a promising route to making high-quality CdTe and CdZnTe boules, say Max Robinson and Arnab Basu from Kromek.
Monday 13th October 2008
The internet is creaking under the strain of rocketing traffic, but help is now on its way in the form of faster transceiver chips that can operate within existing optical networks, reports Roy Rubenstein.
Monday 6th October 2008
From its unique position linking Japan's power companies, the Central Research Institute of the Electric Power Industry is on a mission to exploit SiC devices' efficiency. Andy Extance reports.
Monday 29th September 2008
If you want to put down robust and highly conformal films for LED and radio-frequency electronic device manufacture, then you ought to consider a novel nanolayer deposition tool that features a plasma film treatment step in each deposition cycle, say Steve Selbrede, Michael Studendorff and Paul Werbaneth from Tegal Corporation.
Monday 22nd September 2008
You would think that US government agencies would be working closely to ensure a successful transition to energy-efficient lighting based on LEDs. You'd be wrong, writes Michael Hatcher.
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Monday 22nd September 2008
LCD-based TVs give great pictures if you're willing to invest in a pricey LED backlighting unit. But the cost of this light source could plummet if manufacturers deploy photonic crystal LEDs made with high-volume stamp-based lithography techniques, say Glasgow University's Faiz Rahman and Ali Khokhar.
Monday 15th September 2008
US military interests seem to be setting the GaN market in motion, but will this provide sufficient rewards for companies getting into the sector? Andy Extance speaks to some of the key figures and tries to extract some sense from the facts that are slipping out from between the official secrets.
Monday 8th September 2008
Low-resistivity 150mm germanium substrates with uniform thicknesses offer a great platform for lowering the cost of triple-junction solar cells for deployment in terrestrial applications, according to a team of researchers from Umicore.
Monday 1st September 2008
As vice-president of Anadigics' wireless business, Ali Khatibzadeh has played a key role in refocusing the company on 3G cellphone and wireless networking technologies. With that strategy now paying off, he talks to Andy Extance about Anadigics' plans for GaN, femtocells, WiMAX and LTE at the MTT-S meeting in Atlanta, Georgia.
Tuesday 26th August 2008
IPRM 2008 focused on two major themes: InP HEMTs for millimeter-wave imaging systems; and faster lasers, modulators and drivers to address increasingly bottlenecked internet traffic. Richard Stevenson reports.
Tuesday 26th August 2008
Japanese companies are continually pushing the boundaries of GaN electronics. Recent industrial efforts have led to the fastest transistors, diodes that can withstand blocking voltages of more than 10 kV and single-chip high-frequency amplifiers producing record gain. Richard Stevenson reports.
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Tuesday 19th August 2008
Diode lasers and their quantum cascade cousins struggle to reach some mid-infrared wavelengths needed for gas sensing and missile jamming, but put the two together and it's a different story, say Chadwick Canedy, Igor Vurgaftman and Jerry Meyer from the US Naval Research Laboratory.
Monday 18th August 2008
Getting SiC transistors into hybrid electric vehicles is a win-win scenario. It will open up a large and lucrative market for the wide-bandgap semiconductor, while squeezing a few more miles per gallon out of the automobile, according to Martin Domeij and Muhammad Nawaz from TranSiC.
Monday 11th August 2008
Despite some initial problems, the leading GaAs wafer fabs in the US are now reaping the advantages of a switch to laser dicing systems that are displacing scribe-and-break equipment. But those yet to change to the laser process can learn a lot from TriQuint Semiconductor's experiences both good and bad, discovers Michael Hatcher.
Monday 4th August 2008
DARPA's funding has made a staggering contribution to the compound semiconductor community. Novel materials and devices have flowed forth from its programs and opened up lucrative markets for military and commercial applications. Richard Stevenson looks back at the agency's first 50 years.
Monday 28th July 2008
Despite burning its way through hundreds of millions of dollars over the past 20 years, InP and GaAs chip maker Bookham is still in business. Remarkably, it now looks like it will be generating cash by the end of 2008. Michael Hatcher asks CEO Alain Couder how he has turned around the company's fortunes.
Monday 28th July 2008
Sometimes it's very difficult to take a successful device and replicate it in another materials system. The GaAs VCSEL is a case in point: although it has been a great commercial success, transferring the design to longer wavelengths has been fraught with difficulty. The main stumbling block is the design and fabrication of lattice-matched mirrors with sufficiently high reflectivity.
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Friday 25th July 2008
In just 10 years the InP/GaAsSb DHBT has evolved from a lab curiosity to research devices inching to terahertz cut-off frequencies, and a commercial product, says ETH Zürich's Colombo Bolognesi.
Monday 21st July 2008
Color-converting phosphors hamper the efficiencies of commercial white LEDs. But this can be avoided by switching to quantum-well growth on multiple facets, say Mitsuru Funato and Yoichi Kawakami from Kyoto University.
Monday 21st July 2008
The copper interconnects that route chip-to-chip data transfer are starting to reach their speed limit. But this looming bottleneck can be overcome by switching to ultra-fast VCSELs with tiny threshold currents, say Yu-Chia Chang and Larry Coldren from the University of California, Santa Barbara.
Monday 14th July 2008
Hall sensors are incredibly versatile devices. They can analyze the constituents of mining samples, form accurate magnetometers and team up with tiny magnets to create a novel magnetic memory that retains its information when the power is switched off, says Micromem's Steven Van Fleet.
Monday 7th July 2008
Why are green LEDs so inefficient? Is it the result of poor carrier injection, high Auger loss, strong internal fields, or simply poor material quality, asks Osram's Matthias Peter.
Monday 30th June 2008
After a year in which the credit crunch took its toll on the global financial markets, deposition equipment vendor Aixtron has maintained its position as the best-performing stock in the compound semiconductor basket.
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