Abstract:
A DRAM memory cell includes a semiconductor substrate, an interlayer dielectric having storage node contact plugs that is formed on the semiconductor substrate, and storage node electrodes that are formed on the interlayer dielectric to contact the storage node contact plugs. The storage node contact plugs are formed such that an entrance portion is formed to be larger in linewidth than a contacting portions, and they are formed in gaps between the bit line structures. From a plan view perspective, the storage node electrodes of one column are offset from the storage node contact plugs in an adjacent column, such that the storage node electrodes are in a diagonal arrangement throughout the semiconductor substrate.
Abstract:
A self-aligned buried contact (BC) pair includes a substrate having diffusion regions; an oxide layer exposing a pair of diffusion regions formed on the substrate; bit lines formed between adjacent diffusion regions and on the oxide layer, each of the bit lines having bit line sidewall spacers formed on sidewalls thereof; a first interlayer dielectric (ILD) layer formed over the bit lines and the oxide layer; a pair of BC pads formed between adjacent bit lines and within the first ILD layer, each BC pad being aligned with one of the pair of exposed diffusion regions in the substrate; and a pair of capacitors, each of the pair of BC pads having one of the pair of capacitors formed thereon, wherein a pair of the bit line sidewall spacers is adjacent to each of the BC pads and the pair of bit line sidewall spacers has an asymmetrical shape.
Abstract:
A method of manufacturing a semiconductor device includes forming conductive structures on a substrate. Each of the conductive structures has a line shape that extends along a first direction parallel to the substrate. Insulating spacers are formed on upper sidewalls of the conductive structures. An insulating interlayer is formed that covers the conductive structures. A portion of the insulating interlayer between the conductive structures is etched to form a contact hole. An upper portion of the contact hole is larger than a lower portion thereof. The upper portion of the contact hole has a first width along the first direction and a second width along a second direction parallel to the substrate and substantially perpendicular to the first direction. The first width is substantially larger than the second width. The contact hole is filled with a conductive material to form a contact plug.
Abstract:
According to some embodiments of the invention, a method of forming a self-aligned contact of a semiconductor device includes forming a plurality of conductive lines that are spaced apart from each other and pass over a plurality of conductive regions. An insulating layer is formed over and between the conductive lines. A plurality of contact holes are then formed to selectively expose the conductive regions by selectively removing the insulating layer without exposing the conductive lines. The contact holes are extended using an isotropic etching until the conductive lines begin to be exposed. Thereafter, contacts are formed in the contact holes such that the contacts are coupled to the conductive regions.
Abstract:
According to some embodiments of the invention, semiconductor devices and DRAM cells have plug contact holes. Methods of forming the same include forming a channel-portion hole disposed in a semiconductor substrate. Lower portions of the plug contact holes between first and second word line patterns extend downward from the main surface of the semiconductor substrate, thereby reducing a contact resistance between plug patterns and electrode impurity regions. The DRAM cell having the plug contact holes can improve the current driving capability of a transistor and the refresh characteristics of a capacitor.
Abstract:
A semiconductor device comprises a plurality of gate structures formed on a substrate, a gate spacer formed on a sidewall of the gate structures, a semiconductor pattern formed on the substrate between the gate structures, a first impurity region and a second impurity region formed in the semiconductor pattern and at surface portions of the substrate, respectively, wherein the first and second impurity regions include a first conductive type impurity, and a channel doping region surrounding the first impurity region, wherein the channel doping region includes a second conductive type impurity.
Abstract:
A semiconductor device comprises a plurality of gate structures formed on a substrate, a gate spacer formed on a sidewall of the gate structures, a semiconductor pattern formed on the substrate between the gate structures, a first impurity region and a second impurity region formed in the semiconductor pattern and at surface portions of the substrate, respectively, wherein the first and second impurity regions include a first conductive type impurity, and a channel doping region surrounding the first impurity region, wherein the channel doping region includes a second conductive type impurity.
Abstract:
A DRAM memory cell includes a semiconductor substrate, an interlayer dielectric having storage node contact plugs that is formed on the semiconductor substrate, and storage node electrodes that are formed on the interlayer dielectric to contact the storage node contact plugs. The storage node contact plugs are formed such that an entrance portion is formed to be larger in linewidth than a contacting portions, and they are formed in gaps between the bit line structures. From a plan view perspective, the storage node electrodes of one column are offset from the storage node contact plugs in an adjacent column, such that the storage node electrodes are in a diagonal arrangement throughout the semiconductor substrate.
Abstract:
A polishing head and a chemical mechanical polishing apparatus having the polishing head including a plate having vacuum holes for transferring vacuum pumping force; a porous film having holes corresponding to the vacuum holes and attached to a lower surface of the plate; a retainer ring attached to the lower surface of the plate at an edge portion thereof and having a sloped surface; a clamp ring attached to the lower surface of the plate adjacent the retainer ring for clamping the retainer ring; an adjusting ring having a sloped surface parallel and in contact with the sloped surface of the retainer ring, the adjusting ring being installed between the retainer ring and the plate; and a diameter adjusting device for adjusting a diameter of the adjusting ring by moving the adjusting ring along the sloped surface of the retainer ring, thereby adjusting a height of the retainer ring.
Abstract:
A method of manufacturing a semiconductor device includes forming conductive structures on a substrate. Each of the conductive structures has a line shape that extends along a first direction parallel to the substrate. Insulating spacers are formed on upper sidewalls of the conductive structures. An insulating interlayer is formed that covers the conductive structures. A portion of the insulating interlayer between the conductive structures is etched to form a contact hole. An upper portion of the contact hole is larger than a lower portion thereof. The upper portion of the contact hole has a first width along the first direction and a second width along a second direction parallel to the substrate and substantially perpendicular to the first direction. The first width is substantially larger than the second width. The contact hole is filled with a conductive material to form a contact plug.