Patent ID: 8592794

Claim:
A resistance random access memory element comprising a first electrode, an insulating layer, a diffusing metal layer, and a second electrode superimposed in sequence, with the diffusing metal layer made of a diffusing metal, with the insulating layer including a plurality of pointed electrodes, with each of the plurality of pointed electrode made of the diffusing metal; with each of the plurality of pointed electrodes including a bottom and a pointed portion, with the bottom being contiguous to the diffusing metal layer, with the pointed portion facing the first electrode, with the pointed portion of each of the plurality of pointed electrodes spaced from the first electrode, and with a space between the pointed portion and the first electrode having no metal object; the plurality of pointed electrodes including a plurality of discrete metal ions, wherein a number of metal ions gradually decreases from the bottom portion to the pointed portion of the plurality of pointed electrodes.