Patent ID: 8609500
Filing Date: 2013-12-17
Classification: H01L

Abstract:
1. A semiconductor device production method comprising: forming in a silicon substrate a first region of a first conductivity type and a second region of a second conductivity type which is in contact with the first region; forming a gate electrode above the first region and the second region; forming an insulation film extending from the gate electrode to the second region to cover part of the gate electrode and part of the second region; forming a source region and a drain region by implanting impurity of the second conductivity type into the silicon substrate using the gate electrode as mask; forming a metal layer on the silicon substrate to cover the gate electrode and the insulation film; performing heat treatment after the metal layer formation to produce silicide on the source region, on the drain region, and on the gate electrode; after performing heat treatment, forming on the silicon substrate an interlayer insulation film to cover the gate electrode and the insulation film; forming in the interlayer insulation film a first contact hole reaching the source region, a second contact hole reaching the drain region, a third contact hole reaching the gate electrode, and at least one additional hole reaching the insulation film; and forming a conductive film in the first, the second, and the third contact hole and the additional hole to form a first, a second and a third electrically conductive via in the first, the second, and the third contact hole and to form an electrically conductive member in the additional hole.