Abstract:
A method for manufacturing a semiconductor device includes providing a patterned hard- mask layer (41). The hard-mask layer (41) is provided on an exposed surface (16) of one or more layers to be patterned of a semiconductor intermediate product (1). The hard-mask layer (41) covers the exposed surface (16) in covered areas (46) of the one or more layers to be patterned and does not cover the exposed surface (16) in bared areas (47) of the one or more layers to be patterned. One or more recesses (17,48,50) are formed in the layers to be patterned by at least partially removing the layers to be patterned in the bared areas (47). The hard-mask layer (41) is ten removed. After removing the hard-mask layer (41) the recess (17,48,50) is filled with a filling material (31,32).
Abstract:
A FinFET (100) comprises a fin-shaped layer-section (116) of a single-crystalline active semiconductor layer (104) extending on an insulating substrate layer (106) along a longitudinal fin direction between, a source layer-section (122), and a drain layer-section (124) of the single-crystalline active semiconductor layer (104). Furthermore, two separate gate-electrode layers (138.1, 138.2) are provided, which do not form sections of the single- crystalline active semiconductor layer, each of the gate-electrode layers facing one of the opposite side faces of the fin- shaped layer-section (116). Each gate-electrode layer is connected with a respective separate gate contact (154, 156). The gate-electrode layers, as seen in a cross-sectional view of a plane that is perpendicular to the longitudinal fin- direction, are arranged on the substrate layer (106) between the respective side face of the fin-shaped layer section and a respective contact-post layer section (118, 120) of the single- crystalline semiconductor layer (104).
Abstract:
An interconnect structure on a substrate is provided. The interconnect structure comprises electrically conductive interconnect elements on at least two interconnect levels on or above a substrate level. In the interconnect structure of the invention, at least one electrically conductive via connects a first interconnect element on one interconnect level or on the substrate level to a second interconnect element on a different interconnect level. The via extends in a via opening of a first dielectric layer and comprises an electrically conductive via material that contains electrically conductive cylindrical carbon nanostructures. At least one cover-layer segment reaches into a lateral extension of the via opening and defines a via aperture that is small enough to prevent a penetration of the carbon nanostructures through the via aperture. This structure enhances control of carbon nanostructure growth in a height direction during fabrication of the interconnect structure.
Abstract:
The present invention relates to a method for fabricating a planar independent- double-gate FET or a planar gate-all-around FET on a bulk semiconductor substrate. The method comprises refilling a surface recess in an active semiconductor region with a buried sacrificial layer, and, after preparing a pre-processing a gate stack by respective deposition and patterning, the formation of a recess in the isolation regions so as to cause the recess to extend, in a depth direction that points towards the inner substrate, to a depth level that allows removing the buried sacrificial layer and so as to cause the recess to undercut portions of gate stack in the channel direction.
Abstract:
A method of minimizing de lamination of a layer (14, 16, or 18), the method includes providing a semiconductor substrate (12), forming a first layer (14) over the semiconductor substrate, wherein the first layer has a first corner (20) and the first corner has a first angle of approximately 90 degrees; forming a second layer (16) over the first layer, wherein the second layer has a second corner (20) and the second corner has a second angle of approximately 90 degrees, and modifying the first and second corners to form a first slanted edge (50, 60, or 70) of the first layer and a second slanted edge (50, 60, or 70) of the second layer, wherein the first slanted edge and the second slanted edge are continuous with each other and the first slanted edge forms a third angle with respect to the semiconductor substrate, wherein the third angle is less than 30 degrees.
Abstract:
A method for fabricating a self-aligned diffusion-barrier cap on a Cu- containing conductive element in an integrated-circuit device comprises: - providing a substrate having a Cu-containing conductive element embedded laterally into a dielectric layer and having an exposed surface; - depositing a metal layer on the exposed surface of conductive element; - inducing diffusion of metal from the metal layer into a top section of the conductive element; - removing the remaining metal layer; - letting diffused metal in the top section of the conductive element and particles of a second constituent react with each other so as to build a compound covering the conductive element. The metal of the metal layer and the second constituent are chosen so that the compound forms a diffusion barrier against Cu diffusion. A reduction the dielectric constant of the dielectric material in an interconnect stack of an integrated-circuit device is achieved.
Abstract:
The present invention relates to an integrated-circuit device that has at least one Copper-containing feature in a dielectric layer, and a diffusion-barrier layer stack arranged between the feature and the dielectric layer. The integrated-circuit device of the invention has a diffusion-barrier layer stack, which comprises, in a direction from the Copper-containing feature to the dielectric layer, a CuSiN layer and a SiN layer. This layer combinat ion provides an efficient barrier for suppressing Copper diffusion from the feature into the dielectric layer. Furthermore, a CuSiN/SiN layer sequence provides an improved adhesion between the layers of the diffusion-barrier layer stack and the dielectric layer, and thus improves the electromigration performance of the integrated-circuit device during operation. Therefore, the reliability of device operation and the lifetime of the integrate- circuit device are improved in comparison with prior-art devices. The invention further relates to a method for fabricating such an integrated-circuit device.
Abstract:
The present invention relates to a method for fabricating at least one feature, which has a target lateral width, in a substrate layer. The method allows fabricating a feature with a target lateral width in a substrate layer that is smaller than can be obtained with the used lithographic equipment. In comparison with known methods, it provides an increased resistance to temperatures typically used during processing, in particular, during a plasma etching step. The increased temperature resistance is achieved by using a layer structure that comprises an amorphous carbon layer on the substrate layer, a capping layer on the amorphous carbon layer, and a first resist layer structure on the capping layer. In this layer structure, a carbon contribution to the etching process, which is usually provided by a resist material, is provided by the amorphous carbon layer, which forms a hard mask on the substrate layer.
Abstract:
The invention relates to a method for selective deposition of Si or SiGe on a Si or SiGe surface. The method exploits differences in physico-chemical surface behaviour according to a difference in doping of first and second surface regions. By providing at least one first surface region with a Boron doping of a suitable concentration range and exposing the substrate surface to a cleaning and passivating ambient atmosphere in a prebake step at a temperature lower or equal than 800 °C, a subsequent deposition step of Si or SiGe will not lead to a layer deposition in the first surface region. This effect is used for selective deposition of Si or SiGe in the second surface region, which is not doped with Boron in the suitable concentration range, or doped with another dopant, or not doped. The method thus saves a usual photolithography sequence required for selective deposition of Si or SiGe in the second surface region according to the prior art.
Abstract:
The present invention relates to a cost saving liquid-treatment unit (100). According to the invention, a control unit (152), which is connected to an input port of a control valve (118, 120, 122), is adapted to set, in dependence on the evaporation rate of a treatment liquid on the substrate at the given or desired temperature of the substrate and/or at the given or desired pressure of a gaseous ambient atmosphere at the substrate, a number of dispense pulses to be applied to the substrate for the liquid treatment, a respective pulse duration of individual dispense pulses, and respective dispense-interruption time spans between the individual dispense pulses. This way, the use of treatment liquid is reduced to a minimum amount, thus reducing costs for providing and cleaning treatment liquid.