Isfet blood testing chip on finger

Isfet blood testing chip on finger

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Credit: JAMES KING-HOLMES/SCIENCE PHOTO LIBRARY

Caption: Blood testing chip. Macro photograph of a microchip used for instant testing of small blood samples. The chip is based on an Isfet, an ion- sensitive field effect transistor. This is a special transistor mounted on a substrate which attracts specific ions. As the ions accumulate, there is a change in electrical potential across the transistor. This can be measured by a microcircuit, thus forming a highly-sensitive chemical detector. Several Isfets, each sensitive to a different ion, can be joined together to make a miniature analysis device. Linked to a computer, the device could produce results for a doctor in about 30 seconds.

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Keywords: blood test, chemical, chemical analysis, chip, electronic, electronics, high-tech, integrated circuit, ion sensitive field effect tra, isfet, microanalysis, microchip, on finger, technology, transistor

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