Abstract:
A method of forming a silicided gate on a substrate having active regions, comprising the steps of: forming a first silicide in the active regions from a first material; and forming a second silicide in the gate from a second material, wherein the first silicide forms a barrier against the second material forming a silicide in the active regions during the second silicide forming step, wherein said second silicide is thicker than said first silicide.
Abstract:
A method of forming a silicided gate on a substrate having active regions, comprising the steps of: forming a first silicide in the active regions from a first material; and forming a second silicide in the gate from a second material, wherein the first silicide forms a barrier against the second material forming a silicide in the active regions during the second silicide forming step, wherein said second silicide is thicker than said first silicide.
Abstract:
A method for fabricating a microelectronic layer. There is first provided a substrate. There is then formed over the substrate a target layer. There is then formed upon the target layer a patterned photoresist layer which defines a first aperture, where the first aperture has a first aperture width which exposes a first portion of the target layer. There is then reflowed thermally the patterned photoresist layer to form a reflowed patterned photoresist layer which defines a substantially straight sided second aperture. The second aperture has a second aperture width less than the first aperture width, and the second aperture thus exposes a second portion of the blanket target layer of areal dimension less than the first portion of the blanket target layer. Finally, there is then fabricated the target layer to form a fabricated target layer while employing the reflowed patterned photoresist layer as a mask layer. The method is useful insofar as it allows the target layer to be fabricated while avoiding the use of advanced microelectronic fabrication photolithographic tooling when forming the patterned photoresist layer.
Abstract:
A method for forming silicided shallow junctions, wherein impurities are implanted into a silicon layer formed over a silicon substrate. A metal layer selected from one of platinum (Pt), palladium (Pd), nickel (Ni) and cobalt (Co) is deposited over the silicon layer. At least one low temperature annealing process is carried out to form a silicide layer as well as the shallow junctions. Pre-anneal of the silicon layer and post-anneal of the silicide between 450.degree. and 600.degree. C. are also employed.
Abstract:
A method for forming a semiconductor structure includes providing a semiconductor substrate, forming a gate stack on the semiconductor substrate, forming a silicon-containing compound stressor adjacent the gate stack, implanting non-siliciding ions into the silicon-containing compound stressor to amorphize an upper portion of the silicon-containing compound stressor, forming a metal layer on the silicon-containing compound stressor while the upper portion of the SiGe stressor is amorphous, and annealing to react the metal layer with the silicon-containing compound stressor to form a silicide region. The silicon-containing compound stressor includes SiGe or SiC.
Abstract:
A method for forming a semiconductor structure includes providing a semiconductor substrate; forming a gate dielectric layer on the semiconductor substrate; forming a metal-containing layer on the gate dielectric; and forming a composite layer over the metal-containing layer. The step of forming the composite layer includes forming an un-doped silicon layer substantially free from p-type and n-type impurities; and forming a silicon layer adjoining the un-doped silicon layer. The step of forming the silicon layer comprises in-situ doping a first impurity. (or need to be change to: forming a silicon layer first & then forming un-doped silicon layer) The method further includes performing an annealing to diffuse the first impurity in the silicon layer into the un-doped silicon layer.
Abstract:
A semiconductor method of manufacture involving suicides is provided. Embodiments comprise forming a stacked arrangement of layers, the stacked arrangement of layers comprising an additive layer on a substrate, and a metal layer on the additive layer, annealing the stacked arrangement of layers to form a metal silicide layer on the substrate, wherein the metal silicide layer includes an additive from the additive layer. Alternative embodiments include etching the stacked arrangement of layers to remove an unreacted material layer. In an alternative embodiment, the stacked arrangement of layer comprises a metal layer on a substrate, an additive layer on the metal layer, and an optional oxygen barrier layer on the additive layer. An annealing process forms a metal silicide containing an additive. Metal silicides formed according to embodiments are particularly resistant to agglomeration during high temperature processing.
Abstract:
A method of forming a silicided gate of a field effect transistor on a substrate having active regions is provided. The method includes the following steps: (a) forming a silicide in at least a first portion of a gate; (b) after step (a), depositing a metal over the active regions and said gate; and (c) annealing to cause the metal to react to form silicide in the active regions, wherein the thickness of said gate silicide is greater than the thickness of said silicide in said active regions.
Abstract:
A process for reducing the thermal budget and enhancing stability in the thermal budget of a metal salicide process used in the formation of metal salicides on substrates, thus eliminating or reducing salicide spiking and junction leakage in microelectronic devices fabricated on the substrates. According to a typical embodiment, a substrate is cooled to a sub-processing temperature which is lower than the metal deposition processing temperature and the salicide-forming metal is deposited onto the reduced-temperature substrate.
Abstract:
A robust dual damascene process is disclosed where the substructure in a substrate is protected from damage caused by multiple etchings required in a damascene process by filling a contact or via hole opening with a protective material prior to the forming of the conductive line opening of the damascene structure having an etch-stop layer separating a lower and an upper dielectric layer. In the first embodiment, the protective material is partially removed from the hole opening reaching the substructure prior to the forming of the upper conductive line opening by etching. In the second embodiment, the protective material in the hole is removed at the same time the upper conductive line opening is formed by etching. In a third embodiment, the disclosed process is applied without the need of an etch-stop layer for the dual damascene process of this invention.