A Method for Enhancing the Sensing Distance of a Fingerprint Sensor
AbstractIn this paper, we describe a method for improving the quality of fingerprint images at long sensing distances by reducing the fringe capacitance formed between a pixel and surrounding fingerprint patterns. Air-walls were applied to the glass attached to a fingerprint sensor for reducing the edge capacitance. Fingerprints and air-wall structures were modeled using a three-dimensional capacitance analysis tool. A prototype was fabricated by stacking glass layers with air-walls with a depth of 50 μm and a pitch of 50 μm on a silicon-type capacitive sensor. Using the results of simulations and prototype experiments, we confirmed that the proposed air-wall structure achieved high enough resolution to distinguish 2.5-lp/mm fingerprint patterns at a sensing distance of 300 μm or longer, and its contrast improved from 0.59 to 0.98. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Song, K.-H.; Choi, J.; Chun, J.-H. A Method for Enhancing the Sensing Distance of a Fingerprint Sensor. Sensors 2017, 17, 2280.
Song K-H, Choi J, Chun J-H. A Method for Enhancing the Sensing Distance of a Fingerprint Sensor. Sensors. 2017; 17(10):2280.Chicago/Turabian Style
Song, Kyung-Hoon; Choi, Jaehuk; Chun, Jung-Hoon. 2017. "A Method for Enhancing the Sensing Distance of a Fingerprint Sensor." Sensors 17, no. 10: 2280.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.