摘要:
A new method is provided for the etch of ultra-small patterns in a silicon based surface. Under the first embodiment, a hardmask layer over a substrate and a layer of ARC over the hardmask layer are successively patterned. The patterned layer of ARC is removed, the remaining patterned hardmask layer is used as a mask for etching the substrate. Under the second embodiment, a first hardmask layer over a substrate, a second hardmask layer over the first hardmask layer and a layer of ARC over the second hardmask layer are successively patterned. The patterned layer of ARC and the second hardmask layer are removed, the remaining first patterned hardmask layer is used as a mask for etching the substrate.
摘要:
A new process is provided for the creation of an improved gate spacer profile. A layer of hardmask material is patterned over the surface of a layer of gate material. The layer of gate material is etch in accordance with the patterned layer of hardmask material, reducing the thickness of the patterned layer of hardmask material. A liner oxide is formed, a film of gate spacer material is deposited over the liner material. The layer of spacer material is etched, forming gate spacers and at the same time the remaining layer of hardmask material.
摘要:
A method is disclosed for smoothing the top surface of a layer of polysilicon which, as deposited, has a rough top surface due to the formation of polysilicon grains. A polymer, such as CxFyBrz, is deposited using chemical vapor deposition. The polymer layer has a thickness large enough so that the top surface of the polymer is at least a critical distance above the peaks of the grains on the top surface of the layer of polysilicon. The layer of polymer and part of the layer of polysilicon are then etched away using an etch back method which etches the polymer and polysilicon at the same etch rate. This results in a layer of polysilicon having a smooth top surface and the same thickness over the entire layer of polysilicon.
摘要:
A method is provided for improving the tungsten, W-filling of hole openings in semiconductor substrates. This is accomplished by forming an opening—which can be used either as a contact or via hole—with a faceted entrance along with tapered side-walls. This combination of faceted entrance and tapered side-walls improves substantially the tungsten W-filling of contact/via holes in substrates without the formation of key-holes, thereby resulting in metal plugs of high electrical integrity and high reliability.
摘要:
The etch rate in a plasma etching system has been monitored in-situ by using optical emission spectroscopy to measure the intensities of two or more peaks in the radiation spectrum and then using the ratio of two such peaks as a direct measure of etch rate. Examples of such peaks occur at 338.5 and 443.7 nm and at 440.6 and 437.6 nm for the fluoride/SOG system. Alternately, the intensities of at least four such peaks may be measured and the product of two ratios may be used. Examples of peaks used in this manner occurred at 440.5, 497.2 and 502.3 nm, also for the fluoride/SOG system. The method is believed to be general and not limited to fluoride/SOG.
摘要:
A method for fabricating a semiconductor device is disclosed. In an embodiment, the method may include providing a semiconductor substrate; forming gate material layers over the semiconductor substrate; forming a multi-layer hard mask layer over the gate material layers, wherein the multi-layer hard mask layer includes a plurality of film stacks, each film stack having a silicon oxide layer and a carbon-containing material layer, each film stack having a thickness equal to or less than about 10 angstrom; patterning the multi-layer hard mask layer, forming an opening of the multi-hard mask layer; etching the gate material layers within the opening of the multi-layer hard mask layer, forming a gate structure; performing a tilt-angle ion implantation process to the semiconductor substrate, wherein a first remaining thickness of the multi-layer hard mask layer is less than a first thickness; and thereafter performing an epitaxy growth to the semiconductor substrate, wherein a second remaining thickness of the multi-layer hard mask layer is greater than a second thickness.
摘要:
Methods and structures for forming a contact hole structure are disclosed. These methods first form a substantially silicon-free material layer over a substrate. A material layer is formed over the substantially silicon-free material layer. A contact hole is formed within the substantially silicon-free material layer and the material layer without substantially damaging the substrate. In addition, a conductive layer is formed in the contact hole so as to form a contact structure.
摘要:
A method of forming an integrated circuit is provided. The method includes performing a multiple-time flash anneal process to a wafer, wherein the multiple-time flash anneal process comprises preheating the wafer to a first preheat temperature; performing a first flash on the wafer with a first flash energy; preheating the wafer to a second preheat temperature; and performing a second flash on the wafer with a second flash energy.
摘要:
A semiconductor device is disclosed that includes: a substrate; a first high-k dielectric layer; a second high-k dielectric layer formed of a different high-k material; and a metal gate. In another form, a method of forming a semiconductor device is disclosed that includes: providing a substrate; forming a first high-k dielectric layer above the substrate; forming a second dielectric layer of a different high-k material above the first dielectric layer; and forming a gate structure above the second dielectric layer. In yet another form, a method of forming a semiconductor device is disclosed that includes: providing a substrate; forming an interfacial layer above the substrate; forming a first high-k dielectric layer above the interfacial layer; performing a nitridation technique; performing an anneal; forming a second high-k dielectric layer of a different high-k material above the first dielectric layer; and forming a metal gate structure above the second dielectric layer.
摘要:
Provided is a semiconductor device including a substrate. A gate formed on the substrate. The gate includes a sidewall. A spacer formed on the substrate and adjacent the sidewall of the gate. The spacer has a substantially triangular geometry. A contact etch stop layer (CESL) is formed on the first gate and the first spacer. The thickness of the CESL to the width of the first spacer is between approximately 0.625 and 16.