Patent ID: 6304666
Filing Date: 2001-10-16
Classification: G01R,G06F,G06K,G11C

Abstract:
An apparatus for sensing patterns of electric potential variations across a surface comprising:a two-dimensional array of transistor structures formed on an insulating support, a transistor structure comprising source and drain regions with an intermediate channel region located in a first layer that is proximate to the insulating support layer, a second layer including a gate, and an intermediate layer between the first and second layers comprising a dielectric that contains mobile hydrogenous ions that move within the dielectric layer in response to electric potential in or proximate to the first and second layers; anda means to present the electric potential variations to the gates of the transistors in the array, the means to present the electric potential variations comprising a photoconductive layer above the second layer with a transparent electrode layer above the photoconductive layer and the apparatus additionally comprising means to create an electric potential sufficient to cause movement of the mobile hydrogenous ions with in the intermediate dielectric layer, said potential being placed between the transparent electrode layer and the sources of the transistors in the array.