摘要:
The present invention relates to a method of forming an isolation structure and a semiconductor structure. The method of forming the isolation structure comprises the steps of: providing a silicon substrate having a (110) crystal plane or a (112) crystal plane and determining the [111] direction of the silicon substrate; forming first trenches in the silicon substrate by wet etching the silicon substrate, the extension direction of the first trenches being substantially perpendicular to the [111] direction; filling the first trenches with a first insulating material to form a first isolator; forming second trenches in the silicon substrate by dry etching the silicon substrate, the extension direction of the second trenches being perpendicular to the extension direction of the first trenches; filling the second trenches with a second insulating material to form a second isolator.
摘要:
The present invention provides a semiconductor structure and a manufacturing method thereof. The method comprises: providing a semiconductor substrate comprising semiconductor devices; depositing a copper diffusion barrier layer on the semiconductor substrate; forming a copper composite layer on the copper diffusion barrier layer; decomposing the copper composite at corresponding positions, where copper interconnection is to be formed, into copper according to the shape of the copper interconnection; and etching off the undecomposed copper composite and the copper diffusion barrier layer underneath, to interconnect the semiconductor devices. The present invention is adaptive for manufacturing interconnection in integrated circuits.
摘要:
It is provided a transistor, a method for manufacturing the transistor, and a semiconductor chip comprising the transistor. A method for manufacturing a transistor may comprise: defining an active area on a semiconductor substrate, and forming on the active area a gate stack, a primary spacer, and source/drain regions, wherein the primary spacer surrounds the gate stack, and the source/drain regions are embedded in the active area and self-aligned with opposite sides of the primary spacer; forming a semiconductor spacer surrounding the primary spacer, and cutting off the ends of the semiconductor spacer in the width direction of the gate stack so as to isolate the source/drain regions from each other; and covering the surfaces of the source/drain regions and the semiconductor spacer with a layer of metal or alloy, and annealing the resulting structure, so that a metal silicide is formed on the surfaces of the source/drain regions, and so that the semiconductor spacer is transformed into a silicide spacer simultaneously. As such, the risk of transistor failure due to atoms or ions of Ni entering the channel region through the source/drain extension regions is reduced.
摘要:
The present invention provides a method for manufacturing a semiconductor structure, comprising: forming a first contact layer on an exposed active region of a first spacer; forming a second spacer at a region of the first contact layer close to a gate stack to partially cover the exposed active region; forming a second contact layer in the uncovered exposed active region, wherein when a diffusion coefficient of the first contact layer is the same as that of the second contact layer, the first contact layer has a thickness less than that of the second contact layer; and when the diffusion coefficient of the first contact layer is different from that of the second contact layer, the diffusion coefficient of the first contact layer is smaller than that of the second contact layer. Correspondingly, the present invention also provides a semiconductor structure. The present invention is beneficial to the suppression of the diffusion of corresponding compositions from the contact layers into the channel region, reduction of the short channel effects, and improvement of the reliability of the semiconductor structure.
摘要:
The present invention relates to a semiconductor device and a method for manufacturing the same. According to the present invention, when a gate is formed via a replacement gate process, a portion of a work function metal layer and a portion of a first metal layer are removed after the work function metal layer and the first metal layer are formed, and then the removed portions are replaced with a second metal layer. A device having such a gate structure greatly reduces the resistivity of the whole gate, due to a portion of the work function metal layer with a high resistivity being removed and the removed portion being filled with the second metal layer with a low resistivity, thereby AC performances of the device are improved.
摘要:
The present invention provides a semiconductor device, which is formed on a semiconductor substrate, comprising a gate stack, a channel region, and source/drain regions, wherein the gate stack is on the channel region, the channel region is in the semiconductor substrate, the source/drain regions are embedded in the semiconductor substrate, and each of the source/drain regions comprises a sidewall and a bottom, a second semiconductor layer being sandwiched between the channel region and a portion of the sidewall distant from the bottom, a first semiconductor layer being sandwiched between the semiconductor substrate and at least a portion of the bottom distant from the sidewall, and an insulating layer being sandwiched between the semiconductor substrate and the other portions of the bottom and/or the other portions of the sidewall. The present invention also provides a method for forming the semiconductor device. The present invention helps preventing the dopants in the source/drain regions from diffusing into the substrate.
摘要:
A method of forming an electrical device is provided that includes forming at least one semiconductor device on a first semiconductor layer of the SOI substrate. A handling structure is formed contacting the at least one semiconductor device and the first semiconductor layer. A second semiconductor layer and at least a portion of the dielectric layer of the SOI substrate are removed to provide a substantially exposed surface of the first semiconductor layer. A retrograded well may be formed by implanting dopant through the substantially exposed surface of the first semiconductor layer into a first thickness of the semiconductor layer that extends from the substantially exposed surface of the semiconductor layer, wherein a remaining thickness of the semiconductor layer is substantially free of the retrograded well dopant. The retrograded well may be laser annealed.
摘要:
The present invention provides a semiconductor device and a method for manufacturing the same. The method for manufacturing the semiconductor device comprises: providing a silicon substrate having a gate stack structure formed thereon and having {100} crystal indices; forming an interlayer dielectric layer coving a top surface of the silicon substrate; forming a first trench in the interlayer dielectric layer and/or in the gate stack structure, the first trench having an extension direction being along crystal direction and perpendicular to that of the gate stack structure; and filling the first trench with a first dielectric layer, wherein the first dielectric layer is a tensile stress dielectric layer. The present invention introduces a tensile stress in the transverse direction of a channel region by using a simple process, which improves the response speed and performance of semiconductor devices.
摘要:
The present application discloses a semiconductor device and a method of manufacturing the same. Wherein, the semiconductor device comprises: a semiconductor substrate; a stressor embedded in the semiconductor substrate; a channel region disposed on the stressor; a gate stack disposed on the channel region; a source/drain region disposed on two sides of the channel region and embedded in the semiconductor substrate; wherein, surfaces of the stressor comprise a top wall, a bottom wall, and side walls, the side walls comprising a first side wall and a second side wall, the first side wall connecting the top wall and the second side wall, the second side wall connecting the first side wall and the bottom wall, the angle between the first side wall and the second side wall being less than 180°, and the first sidewall and the second side wall being roughly symmetrical with respect to a plane parallel to the semiconductor substrate. Embodiments of the present invention are applicable to the stress engineering technology in the semiconductor device manufacturing.
摘要:
The present invention provides a method for manufacturing a semiconductor structure, which lies in covering a first dielectric layer with a second dielectric layer, forming a first contact hole with a small inner diameter within the second dielectric layer first, then etching the first dielectric layer to form a second contact hole with a much great inner diameter, and finally filling a conductive material into the first contact hole and the second contact hole to form contact plugs. Accordingly, the present invention further provides a semiconductor structure favorable for reducing contact resistance.