摘要:
Disclosed are methods for fabricating semiconductor devices incorporating a composite trench isolation structure comprising a first oxide pattern, a SOG pattern and a second oxide pattern wherein the oxide patterns enclose the SOG pattern. The methods include the deposition of a first oxide layer and a SOG layer to fill recessed trench regions formed in the substrate. The first oxide layer and the SOG layer are then subjected to a planarization sequence including a CMP process followed by an etchback process to form a composite structure having a substantially flat upper surface that exposes both the oxide and the SOG material. The second oxide layer is then applied and subjected to a similar CMP/etchback sequence to obtain a composite structure having an upper surface that is recessed relative to a plane defined by the surfaces of adjacent active regions.
摘要:
A semiconductor device includes a substrate having a trench, a liner layer pattern on sidewalls and a bottom surface of the trench, the liner layer pattern including a first oxide layer pattern and a second oxide layer pattern, a diffusion blocking layer pattern on the liner layer pattern, and an isolation layer pattern in the trench on the diffusion blocking layer pattern.
摘要:
Disclosed are methods for fabricating semiconductor devices incorporating a composite trench isolation structure comprising a first oxide pattern, a SOG pattern and a second oxide pattern wherein the oxide patterns enclose the SOG pattern. The methods include the deposition of a first oxide layer and a SOG layer to fill recessed trench regions formed in the substrate. The first oxide layer and the SOG layer are then subjected to a planarization sequence including a CMP process followed by an etchback process to form a composite structure having a substantially flat upper surface that exposes both the oxide and the SOG material. The second oxide layer is then applied and subjected to a similar CMP/etchback sequence to obtain a composite structure having an upper surface that is recessed relative to a plane defined by the surfaces of adjacent active regions.
摘要:
One embodiment of a method of fabricating a flash memory device includes forming a trench mask pattern, which includes a gate insulation pattern and a charge storage pattern stacked in sequence, on a semiconductor substrate; etching the semiconductor substrate using the trench mask pattern as an etch mask to form trenches defining active regions; and sequentially forming lower and upper device isolation patterns in the trench. After sequentially forming an intergate insulation film and a control gate film on the upper device isolation pattern, the control gate film, the intergate insulation pattern and the gloating gate pattern are formed, thereby providing gate lines crossing over the active regions.
摘要:
A semiconductor device having a trench isolation region and methods of fabricating the same are provided. The method includes forming a first trench region in a substrate, and a second trench region having a larger width than the first trench region in the substrate. A lower material layer may fill the first and second trench regions. The lower material layer may be etched by a first etching process to form a first preliminary lower material layer pattern remaining in the first trench region and form a second preliminary lower material layer pattern that remains in the second trench region. An upper surface of the second preliminary lower material layer pattern may be at a different height than the first preliminary lower material layer pattern. The first and second preliminary lower material layer patterns may be etched by a second etching process to form first and second lower material layer patterns having top surfaces at substantially the same height. First and second upper material layer patterns may be formed on the first and second lower material layer patterns, respectively.
摘要:
A semiconductor device having a trench isolation region and methods of fabricating the same are provided. The method includes forming a first trench region in a substrate, and a second trench region having a larger width than the first trench region in the substrate. A lower material layer may fill the first and second trench regions. The lower material layer may be etched by a first etching process to form a first preliminary lower material layer pattern remaining in the first trench region and form a second preliminary lower material layer pattern that remains in the second trench region. An upper surface of the second preliminary lower material layer pattern may be at a different height than the first preliminary lower material layer pattern. The first and second preliminary lower material layer patterns may be etched by a second etching process to form first and second lower material layer patterns having top surfaces at substantially the same height. First and second upper material layer patterns may be formed on the first and second lower material layer patterns, respectively.
摘要:
In a method of forming a device isolation layer, a trench is formed in a substrate and a preliminary fin is formed on the substrate using a hard mask pattern on a surface of the substrate as an etching mask. A first thin layer is formed on the bottom and sides of the trench. A lower insulation pattern is formed in a lower portion of the trench on the first thin layer, and an upper insulation pattern is formed on the lower insulation pattern. The upper insulation pattern is etched away so that the first thin layer remains on a side surface of the preliminary fin. A device isolation layer is formed in the lower portion of the trench and a silicon fin is formed having a top surface thereof that is higher relative to a top surface of the device isolation layer.
摘要:
In a method of manufacturing a non-volatile semiconductor device, a mask structure is formed on a substrate. A trench is formed by partially etching the substrate using the mask structure. A preliminary isolation layer pattern is formed on the substrate to fill the trench. The preliminary isolation layer has an upper face lower than that of the mask structure. A capping layer pattern is formed on the preliminary isolation layer pattern. An opening and an isolation layer pattern are formed by removing the mask structure and a portion on a sidewall of the preliminary isolation layer pattern adjacent to the mask structure. After forming a tunnel oxide layer, a floating gate is formed on the tunnel oxide layer and a sidewall of the isolation layer pattern.
摘要:
In a method of forming an isolation layer, a plurality of trenches is formed on a substrate. A liner is formed on inner walls of the trenches. The liner is thermally oxidized to fill up some of the trenches. The other trenches are filled up with an insulation material. As a result, the isolation layer is free of voids.
摘要:
A semiconductor device may include a semiconductor substrate, trench region, buffer pattern, gap fill layer, and transistor. The trench region may be provided in the semiconductor substrate to define an active region. The buffer pattern and gap fill layer may be provided in the trench region. The buffer pattern and gap fill layer may fill the trench region. The gap fill layer may be densified by the buffer pattern. The transistor may be provided in the active region. A method of manufacturing a semiconductor device may include: forming a trench region in a semiconductor substrate; forming a buffer layer on an inner wall of the first trench region; forming a gap fill layer, filling the trench region; performing a thermal process to react the impurity with the oxygen, forming a buffer pattern; and forming a transistor in the active region.