Parasitic bipolar junction transistors in a floating-gate MOSFET for fluorescence detection
- Authors
- Shin, Kyeong-Sik; Pack, Kyeong-Kap; Park, Jung-Ho; Kim, Tae-Song; Ju, Byeong-Kwon; Kang, Ji Yoon
- Issue Date
- 7월-2007
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- biosensors; bipolar junction transistor (BJT); fluorescence; MOSFET; microfluidic; photodiode
- Citation
- IEEE ELECTRON DEVICE LETTERS, v.28, no.7, pp.581 - 583
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE ELECTRON DEVICE LETTERS
- Volume
- 28
- Number
- 7
- Start Page
- 581
- End Page
- 583
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/125747
- DOI
- 10.1109/LED.2007.899999
- ISSN
- 0741-3106
- Abstract
- In this letter, we examined whether the parasitic bipolar junction transistors (BJTs) in the MOSFET fabricated by the standard CMOS process can play a role as a fluorescence detector. To suppress the action of two vertical parasitic BJTs, the gate and n-well were tied in the parasitic BJTs, and the body node was connected to the drain. The proposed device was compared with the inherent and the parasitic diodes in the MOSFET. It had 100 times higher photocurrents than the diodes in the MOSFET. In addition, it was applied for the detection of the fluorescent signal, and could detect near 10 nM of Alexa 546. Therefore, CMOS-process-compatible parasitic BJTs can be used as a photodetector in an integrated fluorescence detector.
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