JAMES HOLMES / FULMER RESEARCH / SCIENCE PHOTO LIBRARY JAMES HOLMES / FULMER RESEARCH / SCIENCE PHOTO LIBRARY
Glass & silicon wafers used in the manufacture of ultra-sensitive pressure sensors. The wafers will be bonded together to form around 200 tiny sensors, each one composed of a layer of glass & a layer of silicon, with a tiny vacuum-filled chamber sandwiched between them. One terminal of the sensor is connected to the silicon & the other to a metal electrode bonded to the glass floor of the chamber. Changes in pressure alter the chamber height & hence the electrical capacitance of the device, allowing it to be calibrated to measure pressure. The sensor is a mechanical device & does not contain integrated circuits or transistors.
Model release not required. Property release not required.