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  • Printed Circuit Board Emission Control
    One of the world's largest printed circuit board (PCB) manufacturers was required to install air pollution abatement equipment to control the VOCs emitted during their soldering and coating process. Three main considerations were important to the customer: * The need for a system with a competitive
  • Honey, I shrunk the circuit board
    of the conventional circuit board. A recent example of this trend is a technique called 3D CSP (chip-scale processing). 3D CSP builds on older miniaturization techniques by folding the circuit substrate to save space. Electronic-circuit-miniaturization techniques have evolved over the years. One
  • Thermal Characterization Process For Open-Frame Board Mounted Power Modules (.pdf)
    The remote on/off feature on the board-mounted power modules (BMPMs) allows the user to switch the module on and off electronically. This feature provides greater flexibility in the start-up sequencing and provides fault control of the user's power system. This application note outlines the types
  • Circuit-board fasteners that won't let go
    The latest hardware is smaller, installs faster, and holds better. Special Products Manager PennEngineering Fastening Surface-mount fasteners are supplied on tape and reels, and install using standard automated surface-mount and solder-reflow processes. Panel fasteners permit quick removal
  • Board-Mounted Power Modules: Soldering and Cleaning (.pdf)
    Board-mounted power modules are purchased by many different and diverse customers for a broad range of applications. there are just as many different soldering techniques and cleaning processes. If a power module is exposed to an excessive amount of heat or an inappropriate cleaning process
  • X-rays spot circuit-board flaws
    X-rays can go deeper into PC-board inspection than traditional vision systems to uncover component placement and soldering errors. EDITED BY JOHN R. GYORKI Self-contained X-ray systems can perform numerous inspection functions including failure analysis, process analysis, and repair verification
  • Light as a feather -- stiff as a board
    . According to Enamul Haque, global technology manager at Azdel, the new lowdensity (LD) GMT offers the same advantages as conventional GMTs but weighs in at only 600 to 2,000 gm/m for the same composite thickness. LD-GMT is made in a process similar to that
  • Aerators Enhance Aerobic Digester Process
    In 2003, Eden WWTP staff became aware of floating brush rotor aerators as a potential approach to providing oxygen transfer and mixing in the aerobic digester. AERATORS ENHANCE AEROBIC DIGESTION PROCESS. After installing four 20-hp aerators, the city of Eden, N.C., happy with performance, results

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