All MOS devices and assemblies should be placed on a grounded bench surface of what type of material ?

All MOS devices and assemblies should be placed on a grounded bench surface of what type of material ?

• A. Metal or Conductive Rubber
• B. Wood
• C. Plastic
• D. Glass

Answer: (A)

MOS devices are highly sensitive to electrostatic discharge, so the work surface must provide a safe path for charges to flow to ground. A bench surface made of metal or conductive rubber, when properly grounded, offers a direct, low-impedance route for static charges to dissipate. This keeps the surface and anything placed on it at ground potential, reducing the chance of a damaging discharge to the device. Wood, plastic, and glass are insulators; they don’t conduct charges away. If a device or a technician carries static on such a surface, charges can accumulate and discharge unpredictably when touched, which can damage MOS components. That's why a grounded metal or conductive rubber bench surface is used in ESD-safe environments.

MOS devices are highly sensitive to electrostatic discharge, so the work surface must provide a safe path for charges to flow to ground. A bench surface made of metal or conductive rubber, when properly grounded, offers a direct, low-impedance route for static charges to dissipate. This keeps the surface and anything placed on it at ground potential, reducing the chance of a damaging discharge to the device.

Wood, plastic, and glass are insulators; they don’t conduct charges away. If a device or a technician carries static on such a surface, charges can accumulate and discharge unpredictably when touched, which can damage MOS components. That's why a grounded metal or conductive rubber bench surface is used in ESD-safe environments.