Abstract:
A method for fabricating a semiconductor device includes forming an isolation layer which defines an active region in a substrate, forming recess patterns in the active region and the isolation layer, baking a surface of the recess pattern by conducting an annealing process and forming a gate dielectric layer over a surface of the recess pattern by conducting an oxidation process.
Abstract:
A fin transistor includes fin active region, an isolation layer covering both sidewalls of a lower portion of the fin active region, a gate insulation layer disposed over a surface of the fin active region, and a gate electrode disposed over the gate insulation layer and the isolation layer, and having a work function ranging from approximately 4.4 eV to approximately 4.8 eV.
Abstract:
A method for fabricating a semiconductor device includes forming a device isolation structure in a substrate to define active regions, forming a hard mask pattern to open a region defining an active region pattern and to cover the device isolation structure, forming the active region pattern by selectively recessing the device isolation structure formed in the opened region using the hard mask pattern as an etch barrier, removing the hard mask pattern, forming a gate insulation layer over the substrate to cover at least the active region pattern, and forming a gate electrode over the gate insulation layer to cover at least the active region pattern.
Abstract:
Provided is a method for forming a buried word line in a semiconductor device. The method includes forming a trench by etching a pad layer and a substrate, forming a conductive layer to fill the trench, planarizing the conductive layer until the pad layer is exposed, performing an etch-back process on the planarized conductive layer, and performing an annealing process in an atmosphere of a nitride-based gas after at least one of the forming of the conductive layer, the planarizing of the conductive layer, and the performing of the etch-back process on the planarized conductive layer.
Abstract:
Disclosed are a transistor and a method for fabricating the same capable of increasing a threshold voltage and a driving current of the transistor. The method includes the steps of forming a first etch mask on a silicon substrate, forming a trench by etching the exposed isolation area, forming a first insulation layer in the trench and the first etch mask, forming a second insulation layer on the first insulation layer, removing the second insulation layer and the first insulation layer until the first etch mask is exposed, forming a trench type isolation layer on the isolation area, forming a second etch mask on an entire surface of the silicon substrate, etching the exposed channel area, performing an etching process with respect to a resultant substrate structure, and forming a gate in the recess.
Abstract:
Disclosed are a transistor and a method for fabricating the same capable of increasing a threshold voltage and a driving current of the transistor. The method includes the steps of forming a first etch mask on a silicon substrate, forming a trench by etching the exposed isolation area, forming a first insulation layer in the trench and the first etch mask, forming a second insulation layer on the first insulation layer, removing the second insulation layer and the first insulation layer until the first etch mask is exposed, forming a trench type isolation layer on the isolation area, forming a second etch mask on an entire surface of the silicon substrate, etching the exposed channel area, performing an etching process with respect to a resultant substrate structure, and forming a gate in the recess.
Abstract:
A memory device includes an active area protruding from a semiconductor substrate. A recess is formed in the active area. A field oxide layer is formed on the semiconductor substrate. A gate electrode extends across the active area while being overlapped with the recess. A gate insulation layer is interposed between the gate electrode and the active area. Source and drain areas are formed in the active area. The transistor structure above defines a recessed transistor structure if it is sectioned along a source-drain line and defines a Fin transistor structure if it is sectioned along a gate line. The transistor structure ensures sufficient data retention time and improves the current drivability while lowering the back bias dependency of a threshold voltage.
Abstract:
A semiconductor device including vertical channel transistor and a method for forming the transistor, which can significantly decrease the resistance of a word line is provided. A vertical channel transistor includes a substrate including pillars each of which has a lower portion corresponding to a channel region. A gate insulation layer is formed over the substrate including the pillars. A metal layer having a low resistance is used for forming a surrounding gate electrode to decrease resistance of a word line. A barrier metal layer is formed between a gate insulation layer and a surrounding gate electrode so that deterioration of characteristics of the insulation layer is prevented. A world line is formed connecting gate electrodes formed over the barrier layer to surround the lower portion of each pillar.
Abstract:
A method for manufacturing a recess gate in a semiconductor device includes forming a device isolation structure on a substrate to define an active region, forming a hard mask pattern over the substrate to selectively expose at least a portion of the active region, forming a recess pattern in the active region through an etching process using the hard mask pattern as an etch barrier, removing the hard mask pattern, forming a gate insulating layer over the substrate, and forming a gate electrode over the gate insulating layer to cover at least the recess pattern.
Abstract:
A fin transistor includes fin active region, an isolation layer covering both sidewalls of a lower portion of the fin active region, a gate insulation layer disposed over a surface of the fin active region, and a gate electrode disposed over the gate insulation layer and the isolation layer, and having a work function ranging from approximately 4.4 eV to approximately 4.8 eV.