A 128/spl times/128 imaging array using lateral bipolar phototransistors in a standard CMOS process [fingerprint detection]

A 128/spl times/128 element photodetector array has been fabricated using lateral bipolar phototransistors in a standard 1.2 /spl mu/m digital CMOS process. One-bit image processing for the array is accomplished through the use of a current mode comparator. Images focused on to the photodetector array have been successfully captured and are presented in this paper.