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Charge Separation

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  • Developing an exit charge specification for semiconductor production equipment
    throughput. Lost production time in $1-billion-plus wafer fabs is very expensive time. Static charge is unavoidable in most production environments, since any motion that causes friction and separation of materials generates charge triboelectrically. Products and process tools are often made
  • Nanogenerators Powered by Body Movement
    , then used an atomic-force microscopic tip to deflect individual wires. As a wire was contacted and deflected by the tip, stretching on one side of the structure and compression on the other side created a charge separation, positive on the stretched side and negative on the compressed side. When
  • Tech Tips - Controlling Static on a Moving Web
    In moving web applications, static charges are frequently generated from the continuous contact-and-separation action of the material in process as it passes over the rollers. Slowing your process speed may reduce the level of the static charge, but it will also reduce your overall productivity
  • Colloidal Stability in Aqueous Suspensions (.pdf)
    Abstract Zeta potential in aqueous suspensions is a function of two variables: charge at the shear plane and free salt ion concentration. [Free here means not attached to the particle surface.] If a dispersant that is added to increase the surface charge density (increase stability) is too
  • Static Electricity
    friction, pressure, or separation of two materials, one of which is usually non-conductive. This process is called the Triboelectric Effect [tribo means rubbing]. The actual level of charge is measured in coulombs. Commonly, however, the electrostatic potential on an object is expressed as a voltage
  • Grounding Clamps & Cables - Essentials for Safety and Reliability (.pdf)
    . The clamp must pass separation force testing,. proven method of preventing electrostatic charge. minimum-clamping force testing and vibration testing at. accumulating on movable or fixed items of plant in flammable. varying frequencies to ensure that approved clamps. and explosive atmospheres. guarantee
  • Measuring Aluminum Brazing Flux Concentration
    Fluxes are used in the various aluminum brazing operations such as the Nocolok(R) Controlled Atmosphere Brazing (CAB) process mainly used in the manufacture of automotive heat exchangers like radiators, condensers, heater cores and charge air coolers. Measure Aluminum Brazing Flux Concentration
  • New Mobile Bonding Systems (.pdf)
    As we have seen in previous issues of Ear to The Ground, it is well known that static electricity can build up to dangerous levels on conductive items of plant and equipment that are isolated from the ground. If they are in sufficient contact with the ground, any charge generated from the operation

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