Patent ID: 8946845
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. An image sensor including an array of pixels, each pixel comprising: a plurality of Bulk Charge Modulated Device (BCMD) devices near the surface of a substrate; a plurality of vertically stacked photo-sites formed in the substrate for collection of photo-generated carriers, wherein the photo-sites are separated by a plurality of potential barriers; said pixel further being configured such that charge generated in each of said plurality of photo-sites, in accordance with the wavelength of impinging light, will be directed to flow to a corresponding one of said plurality of BCMD devices for storage and detection of the generated charge; said BCMD devices further being coupled to column sense lines through row addressing transistors for reading the charge stored in each of the plurality of BCMD devices; and reset transistors coupled to said plurality of BCMD devices for removing charge from said plurality of BCMD devices after charge readout.