Fujitsu Corporation

Kazutaka Yoshizawa

Osamu Tsuboi

Shinichiroh Ikemasu

Tomohiko Tsutsumi

An interlayer insulation film is etched to form contact holes in an integrated circuit part. At this time, a trench is not formed in a guard ring part. Subsequently, ion implantation is carried out in source/drain regions in a peripheral circuit part for contact compensation, and high-temperature annealing is carried out in order to activate implanted impurities. Subsequently, an interlayer insulation film, a storage capacitor, and another interlayer insulation film are formed in sequence. Then, contact holes reaching a part of wiring layers are formed in the peripheral circuit part while, in the guard ring part, a trench reaching a diffusion layer is formed. Next, a barrier metal film is formed in each of the contact holes and the trench, and further, a contact plug comprising, for example, a W film is buried therein.

Semiconductor device having guard ring and manufacturing method thereof

A first insulating film consisting of an insulating material is formed on a major surface of a semiconductor substrate. On the first insulating film, a wire comprising a first conductive layer, which contains one of elemental Ti and a Ti compound, is formed. Cover films consisting of silicon nitride cover the upper surface, the bottom surface, and the side surfaces of the wire having a multilayer structure. Accordingly, a semiconductor device in which insulation defects are unlikely to occur even when the degree of integration is increased can be provided.

Semiconductor device including titanium wires and manufacturing method therefor

A semiconductor device comprising: a first insulation filmformed above a base substrate; a second insulation filmformed on the first insulation film and having different etching characteristics from the first insulation film; and a capacitorincluding a storage electrodeformed on the second insulation film, projected therefrom, the storage electrode being formed, extended downward from side surfaces of the second insulation film. The lower ends of the storage electrodes are formed partially below the etching stopper film, whereby the storage electrodes are fixed by the etching stopper film. Accordingly, the storage electrodes are prevented from peeling off in processing, such as wet etching, etc. The semiconductor device can be fabricated at high yields.

Process for fabricating semiconductor device

Semiconductor device and process for fabricating the same

A semiconductor device comprising: a first insulation film formed above a base substrate ; a second insulation film formed on the first insulation film and having different etching characteristics from the first insulation film; and a capacitor including a storage electrode formed on the second insulation film, projected therefrom, the storage electrode being formed, extended downward from side surfaces of the second insulation film. The lower ends of the storage electrodes are formed partially below the etching stopper film, whereby the storage electrodes are fixed by the etching stopper film. Accordingly, the storage electrodes are prevented from peeling off in processing, such as wet etching, etc. The semiconductor device can be fabricated at high yields.

Growing community of inventors

Kawasaki, Japan

Kazutaka Yoshizawa