Hani Corporation developed ion-sensitive field effect device. Being a basic device in acidhimet-er, such a device is applied to measurement of solution acidity. In a common acidimeter the glasselectrode serves as a sensor, but ion-sensitive field effect device exhibits rapid response, miniature,low output resistance, easy to integration and intelligence. This innovation will promote test tech-nique in chemical engineering, medical and food industries. The Hani corpration is established byInstitute of Semiconductors, Academia Sinica, and Micro-elecronic Center.
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