Patent ID: 8227786
Filing Date: 2012-07-24
Classification: H01L

Abstract:
1. A nonvolatile memory element comprising: a first electrode; a second electrode formed above the first electrode; a variable resistance film formed between the first electrode and the second electrode, a resistance value of the variable resistance film being increased or decreased by an electric pulse applied between the first and second electrodes; and an interlayer dielectric film provided between the first and second electrodes, wherein: said interlayer dielectric film is provided with an opening extending from a surface thereof to the first electrode and having height which is not less than a thickness of the variable resistance film; said variable resistance film is formed at an inner wall face of said opening; an interior region of said opening which is defined by the variable resistance film is filled with an embedded insulating film, said nonvolatile memory element is configured not to flow a current in a portion other than the variable resistance film, when the electric pulse is applied between said first electrode and said second electrode, said opening is groove-shaped, said variable resistance film is formed at both inner wall faces of said groove-shaped opening thereby forming a first variable resistance film and a second variable resistance film, and said second electrode includes two second electrodes provided to contact to said first and second variable resistance films formed at said inner wall faces, respectively.