Patent ID: 8828864

Claim:
A method for manufacturing a semiconductor device comprising: forming a contact plug over a semiconductor substrate; forming a sacrificial insulation film over an upper surface of the semiconductor including the contact plug; forming a first lower electrode hole by etching the sacrificial insulation film until the contact plug is exposed; etching a sidewall of the contact plug to form a second lower electrode disposed at a lower surface of the first lower electrode hole; forming a conductive film over the first lower electrode hole and the second lower electrode hole to form a lower electrode coupled to the contact plug; forming an insulation film pattern to fill a bottom portion of the lower electrode including the second contact hole such that upper sidewalls of the lower electrode are exposed, wherein forming an insulation film pattern includes depositing an insulation film over the lower electrode to fill the second lower electrode hole; and forming a dielectric film over the lower electrode and the insulation film pattern.