Patent ID: 7605046

Claim:
A method for forming an active matrix structure, comprising the steps of: a) providing a matrix substrate with a plurality of row lines and column lines and creating passages through the matrix substrate, each passage defining a center of a pixel area wherein each passage connects to a row line in between adjacent column lines; b) depositing a layer of p-silicon on the matrix substrate; c) creating an n + -doped region for each pixel area in the p-silicon, wherein said n + -doped region is provided from the passage as far as a free surface of said layer of p-silicon, and creating a p + -doped region within said n + -doped region such that a layer of said n + -doped region remains and said p + -doped region reaches a free surface of said n + -doped region; and d) applying a layer made of a matrix material which has particles of electronic ink contained therein, or an organic light-emitting diode layer on free surfaces of said layer of p- silicon and said n + -doped and said p + -doped regions.