Patent ID: 7786461

Claim:
A memory cell device comprising: a memory cell access layer comprising an electrical contact, the electrical contact having an electrical contact surface; a dielectric material over the memory cell access layer; a memory material structure within the dielectric material comprising: a lower memory material layer overlying at least a substantial portion of the electrical contact surface and electrically coupled to the electrical contact, the lower memory material layer having an average lateral dimension; an upper memory material portion spaced apart from the lower memory material layer, the upper memory material portion overlying at least a substantial portion of the lower memory material layer; a memory material element electrically connecting the upper memory material portion with the lower memory material layer, the memory material element defining an electrical property state change region therein, the memory material element having a minimum lateral dimension, the minimum lateral dimension being substantially less than the average lateral dimension; and the upper memory material portion being a cup-shaped upper memory portion defining a memory material opening therein; and a top electrode in electrical contact with the upper memory material portion.