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Improved Photon-Emission-Microscope System

An advanced photon-emission microscope is combined with the latest image-processing software. NASA’s Jet Propulsion Laboratory, Pasadena, California An improved photon-emission-microscope (PEM) instrumentation system has been developed for use in diagnosing failure conditions in semiconductor devices, including complex integrated circuits. This system is designed primarily to image areas that emit photons, at wavelengths from 400 to 1,100 nm, associated with device failures caused by leakage of electric current through SiO2 and other dielectric materials used in multilayer semiconductor structures. In addition, the system is sensitive enough to image areas that emit photons during normal operation. This system supplants a prior PEM system based on a photon-intensified, gated, charge-coupled-device (CCD) camera.

Posted in: Tech Briefs, ptb catchall, Photonics, Briefs

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Product of the Month: Diode Pumped Solid-State Laser System

The MirusTM diode pumped solid-state laser system from Northrop Grumman Space Cutting Edge Optronics (St. Charles, MO) is available with 450 watts of output power. It features an RS 232/485 interface, an electronic shutter, linear PI curve, and an internal flow switch in the laser head. It has been environmentally tested to operate at a temperature range of 15° to 35° C and can be stored at a temperature range of -20°C to 60°C. Its filtered water-cooling system means there is no need for deionization. The Mirus laser is suitable for industrial and manufacturing applications including marking, micromachining and welding, percussion drilling, cutting, scribing, and ablation.

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Compact Laser Diode Modules

Photonic Products (Huntington Beach, CA) has launched 8-mm-diameter laser diode modules for use in prepress plate alignment and laser alignment for label and wrapper cutting machinery, and medical applications such as patient positioning. The modules consist of a brass housing, laser diode, drive circuit, and adjustable collimating or focusing lens. The lens may be adjusted to produce either a collimated beam or focused spot. Electrical connections are made via external flying leads.

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Silicon Avalanche Photodiodes

The SAR500x silicon avalanche photodiodes (Si-APD) from Laser Components (Hudson, NH) feature a 500-μm detector chip with a “reach-through” structure. This structure is responsible for sensitivity in the spectral range of 400 nm to 1,100 nm and, simultaneously, for rise and fall times typically of 450 ps. It is suitable for laser range finding and optical communication, with data transfer rates of up to 1 Gbit/s. It can detect a small amount of light and is suitable for low-noise and low dark current applications, typically 200 pA@M = 100. The SAR500x is available in a hermetically sealed TO-18 can. The SARP500 version can be delivered in a TO-18 can with a thermoelectric cooler in a TO-37 can. It is additionally suitable for use in spectroscopy, fluorescence measurements, medical technology, and LIDAR applications.

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Laser Beam Expanders

Optical Surfaces Ltd. (Surrey, UK) offers laser beam expanders for high-power laser and Doppler shift LIDAR applications. Manufactured to better than lambda/10 surface accuracy, the off-axis design of the beam expanders produces no central obscuration. Alignment aids are supplied with each beam expander to ensure correct beam pointing. The all-reflecting design is achromatic and, with aluminum coatings, can operate from the UV to far IR without adjustment. The beam expanders are housed in a box assembly that provides for fixing to an optical table, and enables transportation to different sites without the need for internal realignment. Options include ultra-hard dielectric, protected silver, and gold laser coatings. Standard models include exit apertures of 100 mm, 150 mm, and 200 mm, with up to 20x magnification systems.

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Interferogram Analysis Software

IntelliWave 5.0 interferometry analysis software from Engineering Synthesis Design (Tucson, AZ) features a new scientific programming language. The automation/client server architecture allows bidirectional communication and data transfer between other programs for industrial systems automation. Wizards provide factory floor quality control measurements of flats, lenses, mirrors, prisms, and corner cubes. A graphics engine enables users to create and present reports. IntelliWave 5.0 can be used with virtually any interferometer.

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Excimer Laser

Coherent (Santa Clara, CA) has introduced the LAMBDA SX 315C excimer laser designed for low-temperature polysilicon (LTPS) crystallization used in the manufacture of flat-panel displays (FPD). The laser features pulse energy of up to 1,050 mJ and pulse stability of 0.5%. It offers an average power of 315W stabilized, and is suitable for micromachining and packaging applications in microelectronics, such as laser direct patterning of flex circuits and laser lift-off. The LAMBDA SX 315C provides the ability to reach mobility levels to minimize threshold voltage variations of thin-film transistors, enabling active-matrix organic light-emitting displays. The laser’s proprietary PowerLokTM and TimeLokTM technologies provide laser stability.

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