Differential injection analysis based on backside-contacted ISFETs

• Published in: ICM 2001 Proceedings. The 13th International Conference on Microelectronics pp. 119 - 122
• Main Authors: Acero, M.C., Errachid, A., Baldi, T., Esteve, J., Garcia, N., Diez-Caballero, T.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2001
• Subjects: Biosensors; Chemical analysis; Chemical sensors; Chemical technology; Electrodes; Fabrication; Fluid flow measurement; Glass; Pollution measurement; Sensor systems
• ISBN: 9780780375222; 078037522X
• DOI: 10.1109/ICM.2001.997502

In this paper a differential injection analysis (DIA) based on ISFETs is presented. The method consists of differential measurements in two parallel micro-cells with identical ISFET sensors connected in the output port. Sample is injected in the first cell as in conventional FIA systems, while in the second cell it is injected as reference buffer. In this way, a simple method for differential measurements is implemented avoiding the need of a reference electrode. By using BSC-ISFET technology integrated with tubular microcell, parallel cells with identical ISFETs are obtained in batch-fabrication.