Patent ID: 7754602
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. A method comprising: sequentially depositing a first oxide film, a nitride film and a second oxide film over a substrate including a plurality of gate electrodes; and then forming a spacer on sidewalls of the gate electrodes by performing a first etching process on the first oxide film, the nitride film and the second oxide film; and then subjecting the second oxide film to a second etching process; and then forming an interlayer dielectric film over the entire surface of the substrate including the spacers; and then forming a contact hole in a space between the gate electrodes; and then embedding a photosensitive material in the contact hole; and then removing a portion of the photosensitive material from the contact hole; and then embedding a metal material in the contact hole, wherein the second etching process comprises forming an undercut region in the space between the gate electrodes, wherein removing the portion of the photosensitive material comprises leaving a portion of the photosensitive material in the undercut region.