Patent ID: 9087871
Filing Date: 2015-07-21
Classification: H01L

Abstract:
1. A method of fabricating a nonvolatile memory device, the method comprising: forming a transistor in a first region of a substrate; forming a contact connected to the transistor; forming an information storage portion disposed two-dimensionally and in a second region of the substrate; sequentially forming a stop film and an interlayer insulating film covering the contact and the information storage portion; forming a first trench on the contact and exposing the stop film, wherein the forming of the first trench includes patterning the interlayer insulating film; and forming a second trench extending through the stop film to expose the contact, wherein the forming of the second trench includes at least partially filling the first trench with a filler, and patterning the filler and the stop film, and wherein a bottom surface of the first trench is lower than a bottom surface of the information storage portion.