Patent ID: 8283750

Claim:
An electric device including an electric element, the electric element comprising a first electrode having a first surface and a pillar, the pillar extending from the first surface in a first direction, the pillar having a length measured from the first surface parallel to the first direction, the pillar having a cross section perpendicular to the first direction and the pillar having a sidewall surface enclosing the pillar and extending in the first direction, wherein the pillar comprises any one of a score and a protrusion extending along at least part of the length of the pillar for giving the pillar improved mechanical stability, wherein the sidewall surface comprises a first region and a second region adjoining each other along a line extending parallel to the first direction, the first region and the second region defining an obtuse angle of inclination with respect to each other, and wherein the pillar comprises three protrusions forming angles of about 120 degrees one with the others, and the pillar has a tripod-like cross-section perpendicular to the first direction.