摘要:
Provided is a method of fabricating a semiconductor microstructure, the method including forming a lower material layer on a semiconductor substrate, the lower material layer including a nitride of a Group III-element; forming a mold material layer on the lower material layer; forming an etching mask on the mold material layer, the etching mask being for forming a structure in the mold material layer; anisotropic-etching the mold material layer and the lower material layer by using the etching mask; and isotropic-etching the mold material layer and the lower material layer.
摘要:
In some embodiments, a semiconductor substrate includes trenches defining active regions. The semiconductor device further includes lower and upper device isolation patterns disposed in the trenches. An intergate insulation pattern and a control gate electrode are disposed on the semiconductor substrate to cross over the active regions. A charge storage electrode is between the control gate electrode and the active regions. A gate insulation pattern is between the charge storage electrode and the active regions, and the intergate insulation pattern directly contacts the upper device isolation pattern between the active regions.
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 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 method of manufacturing a semiconductor device includes forming a silicon nitride layer on a semiconductor substrate on which a predetermined pattern is formed. The silicon nitride layer includes a plurality of bonds formed between silicon and nitrogen. A portion of the bonds formed between silicon and nitrogen is broken to form at least one free bonding site on a surface of the silicon nitride layer. A silane compound and a flow fill method are used to form a silicon oxide layer on the silicon nitride layer.
摘要:
Provided are methods of fabricating flash memory devices that may prevent a short circuit from occurring between cell gate lines. Methods of fabricating such flash memory devices may include forming gate lines including a series of multiple cell gate lines and multiple selection gate lines. Each gate line may include a stacked structure of a tunnel insulating layer, a floating gate, a gate insulating layer, and/or a polysilicon layer operable to be a control gate, all formed on a semiconductor substrate. Methods may include forming a first insulating layer that selectively fills gaps between the cell gate lines from the bottom up and between adjacent ones of the cell gate lines and the selection gate lines, and does not fill a space located on outer sides of the selection gate lines that are opposite the plurality of cell gate lines. A spacer may be formed on the outer sides of the selection gate lines that are opposite to the cell gate lines, after forming the first insulating layer. A second insulating layer may be formed in a space where the spacer is formed.
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 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:
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.