Resistive random access memory having stable forming voltage

A resistive random access memory comprising:

• a first electrode having a mounting face;
• a separating medium having a first face in contact with the mounting face of the first electrode, a second face opposite to the first face, and an inner face extending between the first and second faces, wherein the separating medium forms a through hole extending from the first face to the second face, wherein a part of the mounting face of the first electrode is not covered by the separating medium, and wherein the separating medium has a first dielectric;
• a resistance changing layer extending along the part of the mounting face of the first electrode as well as the inner face and the second face of the separating medium, wherein the resistance changing layer has a second dielectric having a dielectric constant larger than a dielectric constant of the first dielectric by 2 or less;
• and
• a second electrode arranged on the resistance changing layer.

A resistive random access memory, comprising:

• a first electrode having a mounting face;
• a separating medium having a first face in contact with mounting face of the first electrode, a second face opposite to the first face, and an inner face extending between the first and second faces, wherein the separating medium forms a through hole extending from the first face to the second face, wherein a part of the mounting face of the first electrode is not covered by the separating medium, and wherein the separating medium has a first dielectric;
• a resistance changing layer extending along the part of the mounting face of the first electrode as well as the inner face and the second face of the separating medium, wherein the resistance changing layer has a second dielectric having a dielectric constant smaller than a dielectric constant of the first dielectric;
• and
• a second electrode arranged on the resistance changing layer,
• wherein the separating medium further comprises a third dielectric having a dielectric constant different from the dielectric constant of the first electrode, wherein the first and third dielectrics have different distribution regions, and wherein both the first and third dielectrics adjoin the resistance changing layer.