摘要:
A method for fabricating a vertical channel type non-volatile memory device including a plurality of memory cells stacked along channels protruding from a substrate includes: alternately forming a plurality of first material layers and a plurality of second material layers over the substrate; forming a buffer layer over the substrate with the plurality of the first material layers and the plurality of the second material layers formed thereon; forming trenches by etching the buffer layer, the plurality of the second material layers, and the plurality of the first material layers; forming a material layer for channels over the substrate to fill the trenches; and forming the channels by performing a planarization process until a surface of the buffer layer is exposed.
摘要:
A method for fabricating a semiconductor device includes forming buried bit lines separated from each other by a trench in a substrate, forming a plurality of first pillar holes that expose a top surface of the substrate, forming first active pillars buried in the first pillar holes, forming a gate conductive layer over entire surface of a resultant structure including the first active pillars, forming a gate electrode by etching the gate conducting layer to cover the first active pillars, forming a plurality of second pillar holes that expose the first active pillars by partially etching the gate electrode, and forming second active pillars buried in the second pillar holes and connected to the first active pillars.
摘要:
In a method of fabricating a semiconductor device on a substrate which includes a plurality of pillar patterns, an impurity region between adjacent pillar patterns, a gate electrode on each pillar pattern, a first capping layer covering the gate electrode, and a separation layer covering the first capping layer between the gate electrodes of adjacent pillar patterns, the first capping layer is removed except for a portion contacting the separation layer, a sacrificial layer is formed to cover the gate electrode, a second capping layer is formed on sidewalls of each pillar pattern, the sacrificial layer is removed and a word line connecting the gate electrodes of the adjacent pillar patterns is formed. In the manufactured device, the first capping layer isolates the impurity region from the word line and the second capping region prevents the sidewalls of the respective pillar pattern from being exposed.
摘要:
A method for fabricating a semiconductor device includes forming buried bit lines in a first substrate; forming a trench that separate the buried bit lines from each other; forming an interlayer insulation layer to gap-fill the trench; forming a second substrate over the first substrate gap-filled with the interlayer insulation layer; forming a protective pattern over the second substrate; forming a plurality of active pillars by etching the second substrate using the protective pattern as an etch barrier; and forming vertical gates surrounding sidewalls of the active pillars.
摘要:
A method for fabricating a semiconductor device includes forming buried bit lines separated from each other by a trench in a substrate, forming a plurality of first pillar holes that expose a top surface of the substrate, forming first active pillars buried in the first pillar holes, forming a gate conductive layer over entire surface of a resultant structure including the first active pillars, forming a gate electrode by etching the gate conducting layer to cover the first active pillars, forming a plurality of second pillar holes that expose the first active pillars by partially etching the gate electrode, and forming second active pillars buried in the second pillar holes and connected to the first active pillars.
摘要:
A method of fabricating a semiconductor device includes forming a plurality of pillar patterns on a substrate, filling a gap between the pillar patterns with a first conductive layer, forming a first hard mask layer pattern over the pillar patterns adjacent in one direction, etching the first conductive layer using the first hard mask layer pattern as an etch barrier, forming a second hard mask pattern over the pillar pattern adjacent in the other direction that crosses the one direction, and forming a gate electrode surrounding the pillar patterns by etching the first conductive layer etched using the second hard mask layer pattern as an etch barrier.
摘要:
In a method of fabricating a semiconductor device on a substrate having a pillar pattern, a gate electrode is formed on the pillar pattern without etching the latter. A conductive pattern is filled between adjacent pillar patterns, a spacer is formed above the conductive pattern and surrounding sidewalls of each pillar pattern, and the gate electrode is formed by etching the conductive pattern using the spacer as an etch barrier.
摘要:
A method for fabricating a semiconductor device with a dual gate structure is provided. The method includes: forming a gate oxide layer over a substrate; forming a gate conductive layer over the gate oxide layer; forming an amorphous carbon layer over the gate conductive layer; forming a photosensitive pattern over the amorphous carbon layer; etching the amorphous carbon layer using the photosensitive pattern as an etch mask to form a patterned amorphous carbon layer; performing an ion implantation process using the patterned amorphous carbon layer as an ion implantation barrier to implant an impurity onto the gate conductive layer; removing the patterned amorphous carbon layer; and patterning the gate conductive layer to form a gate structure.
摘要:
A method for forming fine pattern includes sequentially forming a first thin film and a second thin film over a target layer for patterning, forming a partition over the second thin film, removing the partition after forming spacers on sidewalls of the partition, forming first pattern of the second thin film by etching the second thin film of a first region and the second thin film of a second region while exposing the spacers, forming second pattern of the second thin film by using the spacers as masks and etching the first pattern of the second thin film in the first region, forming first thin film pattern by using the first and second patterns of the second thin film as masks in the first and second regions and etching the first thin film, and etching the pattern target layer.
摘要:
In a method of fabricating a semiconductor device on a substrate which includes a plurality of pillar patterns, an impurity region between adjacent pillar patterns, a gate electrode on each pillar pattern, a first capping layer covering the gate electrode, and a separation layer covering the first capping layer between the gate electrodes of adjacent pillar patterns, the first capping layer is removed except for a portion contacting the separation layer, a sacrificial layer is formed to cover the gate electrode, a second capping layer is formed on sidewalls of each pillar pattern, the sacrificial layer is removed and a word line connecting the gate electrodes of the adjacent pillar patterns is formed. In the manufactured device, the first capping layer isolates the impurity region from the word line and the second capping region prevents the sidewalls of the respective pillar pattern from being exposed.