摘要:
A method for forming a wire line by a damascene process includes forming a first insulating layer on a semiconductor substrate, etching the first insulating layer to form a contact hole, and forming a first conductive layer over the first insulating layer that fills the contact hole. The first conductive layer is patterned, and a storage node contact is formed that fills the contact hole and is electrically connected to the semiconductor substrate. A hard mask is formed over the storage node contact and the first insulating layer is etched using the hard mask as an etch mask to form a trench in the first insulating layer. A bit line is formed in the trench that is electrically connected to the semiconductor substrate. A second insulating layer is formed that covers the bit line. The second insulating layer and the hard mask are planarized and a storage node of a capacitor is formed on the storage node contact.
摘要:
A semiconductor device includes an insulating layer having a T-shaped groove formed by a wide opening overlapping a narrow opening, a bit line conductive layer that at least partially fills the narrow opening, and a bit line capping layer that fills the groove so that its top surface is as high as that of the insulating layer. Spacers are formed on the inner walls of the wide opening.
摘要:
A capacitor for a semiconductor memory device is fabricated by forming a mold layer on a semiconductor substrate that includes a peripheral circuit area and a cell array area which includes a plug in a buried contact hole. A hard mask layer pattern is formed on the mold layer. The mold layer is etched, using the hard mask layer pattern as an etch mask, to form a mold layer pattern. The hard mask layer pattern is then removed from the mold layer pattern or only partially etched back on the mold layer pattern. A capacitor lower electrode is formed along the walls of the buried contact hole and on a surface of the mold layer pattern. A capacitor dielectric layer is formed on the capacitor lower electrode and a capacitor upper electrode is formed on the capacitor dielectric layer.
摘要:
A semiconductor device including a bit line formed using a damascene technique and a method of fabricating the same. The method includes forming an insulating layer on a substrate, forming a groove by etching the insulating layer to a partial depth, and forming spacers on the inner walls of the groove. An opening is formed by etching the insulating layer disposed under the groove using the spacers as an etch mask. A conductive layer is formed to fill the opening. A capping layer is formed to fill the groove.
摘要:
A method of fabricating a flash memory having a U-shape floating gate is provided. The method includes forming adjacent isolation layers separated by a gap and forming a tunnel oxide layer in the gap. After a conductive layer is formed on the tunnel oxide layer to a thickness not to fill the gap, a polishing sacrificial layer is formed on the conductive layer. The sacrificial layer and the conductive layer on the isolation layers are removed, thereby forming a U-shape floating gate self-aligned in the gap, and concurrently forming a sacrificial layer pattern within an inner portion of the floating gate. Selected isolation layers are then recessed to expose sidewalls of the floating gate. The sacrificial layer pattern is then removed from the floating gate to expose an upper surface of the floating gate.
摘要:
A method of fabricating a semiconductor device comprising a method of forming an etching mask used for etching a semiconductor base material is disclosed. The method of fabricating a semiconductor device comprises forming hard mask patterns on a semiconductor base material; forming material layers covering the lateral and top surfaces of the hard mask patterns to form openings between adjacent hard mask patterns, wherein the width of each opening is smaller than the distance between adjacent hard mask patterns; and etching the semiconductor base material using the hard mask patterns and material layers as an etching mask.
摘要:
A method of manufacturing a semiconductor memory device includes forming a carbon-containing layer on a semiconductor substrate, forming an insulating layer pattern on the carbon-containing layer, the insulating layer pattern partially exposing an upper surface of the carbon-containing layer, dry-etching the exposed portion of the carbon-containing layer, to form a carbon-containing layer pattern for defining a storage node hole, forming a bottom electrode inside the storage node hole, forming a dielectric layer on the bottom electrode inside the storage node hole, the dielectric layer covering the bottom electrode, and forming an upper electrode on the dielectric layer inside the storage node hole, the upper electrode covering the dielectric layer.
摘要:
A method of manufacturing a semiconductor memory device includes forming a carbon-containing layer on a semiconductor substrate, forming an insulating layer pattern on the carbon-containing layer, the insulating layer pattern partially exposing an upper surface of the carbon-containing layer, dry-etching the exposed portion of the carbon-containing layer, to form a carbon-containing layer pattern for defining a storage node hole, forming a bottom electrode inside the storage node hole, forming a dielectric layer on the bottom electrode inside the storage node hole, the dielectric layer covering the bottom electrode, and forming an upper electrode on the dielectric layer inside the storage node hole, the upper electrode covering the dielectric layer.
摘要:
A method of fabricating a flash memory device using a process for forming a self-aligned floating gate is provided. The method comprises forming mask patterns on a substrate, etching the substrate using the mask patterns as an etch mask to form a plurality of trenches, and filling the trenches with a first insulating layer, wherein sidewalls of the mask patterns remain exposed after filling the trenches with the first insulating layer. The method further comprises forming spacers on the exposed sidewalls of the mask patterns, filling upper insulating spaces with a second insulating layer thereby defining isolation layers, and removing the mask patterns and the spacers.
摘要:
A method of fabricating a flash memory device using a process for forming a self-aligned floating gate is provided. The method comprises forming mask patterns on a substrate, etching the substrate using the mask patterns as an etch mask to form a plurality of trenches, and filling the trenches with a first insulating layer, wherein sidewalls of the mask patterns remain exposed after filling the trenches with the first insulating layer. The method further comprises forming spacers on the exposed sidewalls of the mask patterns, filling upper insulating spaces with a second insulating layer thereby defining isolation layers, and removing the mask patterns and the spacers.