A matrix structure including first and second arrays of conductors (20) mutually arranged to define a matrix having matrix elements at intersections in two but not three dimensions of a conductor of the first array and a conductor of the second array, and voltage responsive conductive material (22) disposed intermediate the first and second arrays of conductors at locations at the intersections and at locations not at the intersections and being operative to be conductive only at locations thereat where there exists at least a predetermined voltage difference thereacross. A method for producing said matrix structure is also disclosed.
