Keithley’s Ultra-Fast Current-Voltage System Combines Three Essential Characterization Capabilities in One Chassis
Electronics No Comments »Keithley Instruments, Inc. (NYSE:KEI), a world leader in advanced electrical test instruments and systems, today introduced the Model 4225-PMU Ultra-Fast I-V Module, the latest addition to the growing range of instrumentation options for the Model 4200-SCS Semiconductor Characterization System. It integrates ultra-fast voltage waveform generation and current/voltage measurement capabilities into the Model 4200-SCS’s already powerful test environment to deliver the industry’s broadest dynamic range of voltage, current, and rise/fall/pulse times, expanding the system’s materials, device, and process characterization potential dramatically. Just as important, the Model 4225-PMU makes ultra-fast I-V sourcing and measurement as easy as making DC measurements. Its wide programmable sourcing and measurement ranges, pulse widths, and rise times make it well-suited for applications that demand both ultra-fast voltage outputs and synchronized measurement – from nanometer CMOS to flash memory. For more information, visit http://keithley.acrobat.com/p77402742/.
Unlike previous solutions, which required up to three different test stands to characterize a device, material, or process thoroughly, the Model 4225-PMU’s broad dynamic range allows characterizing the full range of materials, devices, and processes with a single set of instrumentation. Now, labs can configure one flexible system to handle all three measurement types: precision DC I-V (Model 4200-SMU), AC impedance (Model 4210-CVU C-V Instrument), and ultra-fast I-V or transient I-V (Model 4225-PMU).
Cree, Inc. (Nasdaq: CREE), a market leader in LED lighting, announces another industry-best reported efficacy record of 208 lumens per watt for a white power LED. This R&D result passes a significant milestone within the solid-state lighting industry as well as demonstrates Cree’s relentless drive to increase the performance of its LEDs. Cree’s tests confirmed that the LED produced 208 lumens of light output and achieved 208 lumens per watt efficacy at a correlated color temperature of 4579 K. The tests were conducted under standard LED test conditions at a drive current of 350 mA at room temperature. “We have now broken the elusive 200-lumen-per-watt efficacy barrier for a single white power LED,” said John Edmond, Cree co-founder and director of advanced optoelectronics. “This is a result of improvements in blue optical output power, lower operating voltage and higher conversion efficiency. We continue to push the envelope in white LED technology to enable the highest efficiency white lighting products in the marketplace.” While this level of performance is not yet available in Cree’s production LEDs, Cree continues to lead the industry with the broadest family of high-performance LEDs. 
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