Abstract:
Provided are a semiconductor device having a self-aligned contact plug and a method of fabricating the semiconductor device. The semiconductor device includes conductive patterns, a first interlayer insulating layer, a first spacer, a second interlayer insulating layer, and a contact plug. In each conductive pattern, a conductive layer and a capping layer are sequentially deposited on an insulating layer over a semiconductor substrate. The first interlayer insulating layer fills spaces between the conductive patterns and has a height such that when the first interlayer insulating layer is placed on the insulating layer, the first interlayer insulating layer is lower than a top surface of the capping layer but higher than a top surface of the conductive layer. The first spacer surrounds the outer surface of the capping layer on the first interlayer insulating layer. The second interlayer insulating layer covers the first interlayer insulating layer, the capping layer, and the first spacer and has a planarized top surface. The contact plug passes through the second interlayer insulating layer, the first interlayer insulating layer, and the insulating layer between the conductive patterns, is electrically connected to the semiconductor substrate, has an outerwall surrounded by a second spacer, and is self-aligned with the capping layer.
Abstract:
A semiconductor device includes a plurality of gate trenches, each of which has first inner walls, which face each other in a first direction which is perpendicular to a second direction in which active regions extend, and second inner walls, which face each other in the second direction in which the active regions extends. An isolation layer contacts a gate insulating layer throughout the entire length of the first inner walls of the gate trenches including from entrance portions of the gate trenches to bottom portions of the gate trenches, and a plurality of channel regions are disposed adjacent to the gate insulating layers in the semiconductor substrate along the second inner walls and the bottom portions of the gate trenches.
Abstract:
Methods are provided for fabricating semiconductor devices having capacitors, which prevent lower electrodes of the capacitors from breaking or collapsing and which provide increased capacitance of the capacitors. For instance, a method includes forming a first insulating layer on a semiconductor substrate, forming a first hole in the first insulating layer, forming a contact plug in the first hole, forming a second insulating layer having a landing pad, wherein the landing pad contacts an upper surface of the contact plug, forming an etch stop layer on the landing pad and the second insulating layer, forming a third insulating layer on the etch stop layer, forming a third hole through the third insulating layer and etch stop layer to expose the landing pad, selectively etching the exposed landing pad, forming a lower electrode on the selectively etched landing pad, and then forming a capacitor by forming a dielectric layer and an upper electrode on the lower electrode.
Abstract:
A method of forming a contact hole includes forming a plurality of lower patterns on a substrate. An insulation layer is formed on the lower patterns. A self-assemble induction layer is formed on the insulation layer. A recess is formed in the self-assemble induction layer in alignment with the lower patterns. A block copolymer layer is formed in the recess to form a polymer domain at a distance from a sidewall of the recess and a polymer matrix surrounding the polymer domain. The polymer domain is removed. The self-assemble induction layer is etched using the polymer matrix as a mask to form an opening through the self-assemble induction layer to expose the insulation layer. The insulation layer exposed by the opening is etched using the self-assemble induction layer as a mask so as to form a contact hole.
Abstract:
A semiconductor device includes a plurality of gate trenches, each of which has first inner walls, which face each other in a first direction which is perpendicular to a second direction in which active regions extend, and second inner walls, which face each other in the second direction in which the active regions extends. An isolation layer contacts a gate insulating layer throughout the entire length of the first inner wails of the gate trenches including from entrance portions of the gate trenches to bottom portions of the gate trenches, and a plurality of channel regions are disposed adjacent to the gate insulating layers in the semiconductor substrate along the second inner walls and the bottom portions of the gate trenches.
Abstract:
A semiconductor device including a transistor and a method of forming thereof are provided. The semiconductor device comprises a metal gate electrode. A lower portion of the metal gate electrode fills a channel trench formed at a predetermined region of a substrate, and an upper portion of the metal gate electrode protrudes on the substrate. A gate insulating layer is interposed between inner sidewalls and a bottom surface of the channel trench, and the metal gate electrode. Source/drain regions are formed at the substrate in both sides of the metal gate electrode.
Abstract:
An etching process including plasma pretreatment for generating a polymer layer formed of carbon on a photoresist pattern. The photoresist pattern is treated with plasma that does not contain fluorine radicals and that provides carbon radicals. An etching process is performed on an etching target layer by using the photoresist pattern as an etch mask.
Abstract:
Methods for fabricating semiconductor devices having capacitors are provided. A plurality of storage node electrodes are formed on a semiconductor substrate. Then, a capacitor dielectric layer is formed over the storage node electrodes. A plate electrode layer is subsequently formed on the capacitor dielectric layer. A hard mask layer is then formed on the resultant structure where the plate electrode layer is formed so as to fill a gap between the adjacent storage node electrodes. The hard mask layer and the plate electrode layer are successively patterned to form a plate electrode.
Abstract:
Methods of fabricating a semiconductor integrated circuit device are disclosed. The methods of fabricating a semiconductor integrated circuit device include forming a hard mask layer on a base layer, forming a line sacrificial hard mask layer on the hard mask layer in a first direction, coating a high molecular organic material layer on the line sacrificial hard mask layer pattern, patterning the high molecular organic material layer and the line sacrificial hard mask layer pattern in a second direction, forming a matrix sacrificial hard mask layer pattern, forming a hard mask layer pattern by patterning the hard mask layer with the matrix sacrificial hard mask layer pattern as an etching mask and forming a lower pattern by patterning the base layer using the hard mask layer pattern as an etch mask. The method according to the invention is simpler and less expensive than conventional methods.
Abstract:
Disclosed herein is a method for etching a face of an object and more particularly a method for etching a rear face of a silicon substrate. The object having a silicon face is positioned so as to be spaced apart from a plasma-generating member by a predetermined interval distance. The plasma-generating member generates arc plasmas to form a plasma region. A reaction gas is allowed to pass through the plasma region to generate radicals having high energies and high densities. The radicals react with the object to etch the face of the object. The face of the object can be rapidly and uniformly etched.