摘要:
A semiconductor device is provided. The semiconductor device includes a gate spacer that defines a trench on a substrate and includes an upper part and a lower part, a gate insulating film that extends along sidewalls and a bottom surface of the trench and is not in contact with the upper part of the gate spacer, a lower conductive film that extends on the gate insulating film along the sidewalls and the bottom surface of the trench and is not overlapped with the upper part of the gate spacer, and an upper conductive film on an uppermost part of the gate insulating film on the lower conductive film.
摘要:
A semiconductor device is provided. The semiconductor device includes a gate spacer that defines a trench on a substrate and includes an upper part and a lower part, a gate insulating film that extends along sidewalls and a bottom surface of the trench and is not in contact with the upper part of the gate spacer, a lower conductive film that extends on the gate insulating film along the sidewalls and the bottom surface of the trench and is not overlapped with the upper part of the gate spacer, and an upper conductive film on an uppermost part of the gate insulating film on the lower conductive film.
摘要:
A method of manufacturing a semiconductor device includes forming an interlayer dielectric film that has first and second trenches on first and second regions of a substrate, respectively, forming a first metal layer along a sidewall and a bottom surface of the first trench and along a top surface of the interlayer dielectric film in the first region, forming a second metal layer along a sidewall and a bottom surface of the second trench and along a top surface of the interlayer dielectric film in the second region, forming a first sacrificial layer pattern on the first metal layer such that the first sacrificial layer fills a portion of the first trench, forming a first electrode layer by etching the first metal layer and the second metal layer using the first sacrificial layer pattern, and removing the first sacrificial layer pattern.
摘要:
Semiconductor devices may include a substrate, gate electrodes on the substrate, and source/drain regions at both sides of each of the gate electrodes. Each of the gate electrodes may include a gate insulating pattern on the substrate, a lower work-function electrode pattern that is on the gate insulating pattern and has a recessed upper surface, and an upper work-function electrode pattern that conformally extends on the recessed upper surface of the lower work-function electrode pattern. Topmost surfaces of the lower work-function electrode patterns may be disposed at an equal level, and the upper work-function electrode patterns may have different thicknesses from each other.
摘要:
Semiconductor devices may include a substrate, gate electrodes on the substrate, and source/drain regions at both sides of each of the gate electrodes. Each of the gate electrodes may include a gate insulating pattern on the substrate, a lower work-function electrode pattern that is on the gate insulating pattern and has a recessed upper surface, and an upper work-function electrode pattern that conformally extends on the recessed upper surface of the lower work-function electrode pattern. Topmost surfaces of the lower work-function electrode patterns may be disposed at an equal level, and the upper work-function electrode patterns may have different thicknesses from each other.
摘要:
In an etching method, a thin layer is formed on a first surface of a first substrate doped with first impurities having a first doping concentration. The thin layer is doped with second impurities having a second doping concentration lower than the first doping concentration. A second substrate is formed on the thin layer. A second surface of the first substrate is polished. The polished first substrate is cleaned using a cleaning solution including ammonia and deionized water. The cleaned first substrate is etched to expose the thin layer.