摘要:
Methods for fabricating integrated circuits are provided. In an embodiment, a method for fabricating an integrated circuit includes providing a semiconductor substrate and forming a gate structure on the semiconductor substrate. The gate includes a high-k dielectric material. In the method, a fluorine-containing liquid is contacted with the high-k dielectric material and fluorine is incorporated into the high-k dielectric material.
摘要:
Disclosed herein are various methods of forming replacement gate structures for semiconductor devices. In one example, the method includes forming a sacrificial gate structure above a semiconducting substrate, removing the sacrificial gate structure to thereby define a gate cavity for a replacement gate structure, forming a gate insulation layer in the gate cavity and forming a layer of metal above the gate insulation layer. In this example, the method also includes forming a patterned etch mask layer above the metal layer that exposes substantially vertically oriented portions of the metal layer within the cavity and covers a substantially horizontally oriented portion of the metal layer within the cavity, performing an etching process through the patterned etch mask layer to reduce a thickness of the exposed substantially vertically oriented portions of the metal layer and removing the patterned etch mask layer.
摘要:
Methods for fabricating integrated circuits are provided. In an embodiment, a method for fabricating an integrated circuit includes providing a semiconductor substrate having a gate structure. An atomic layer deposition (ALD) process is performed to deposit a spacer around the gate structure. The ALD process includes alternating flowing ionized radicals of a first precursor across the semiconductor substrate and flowing a chlorosilane precursor across the semiconductor substrate to deposit the spacer.
摘要:
Methods are provided for fabricating integrated circuits having controlled threshold voltages. In accordance with one embodiment a method includes forming a gate dielectric overlying an N-doped silicon substrate and depositing a layer of titanium nitride and a layer of tantalum nitride overlying the gate dielectric. A sub-monolayer of tantalum oxide is deposited overlying the layer of tantalum nitride by a process of atomic layer deposition, and oxygen is diffused from the tantalum oxide through the tantalum nitride and titanium nitride.
摘要:
A semiconductor process and apparatus includes forming first and second gate electrodes (151, 161) by forming the first gate electrode (151) over a first high-k gate dielectric (121) and forming the second gate electrode (161) over at least a second high-k gate dielectric (122) different from the first gate dielectric (121). Either or both of the high-k gate dielectric layers (121, 122) may be formed by depositing and selectively etching an initial layer of high-k dielectric material (e.g., 14). As deposited, the initial layer (14) has an exposed surface (18) and an initial predetermined crystalline structure. An exposed thin surface layer (20) of the initial layer (14) is prepared for etching by modifying the initial crystalline structure in the exposed thin surface layer. The modified crystalline structure in the exposed thin surface layer may be removed by applying a selective etch, such as HF or HCl.
摘要:
A transistor is formed using a semiconductor substrate and forming a control electrode overlying the semiconductor substrate. A first current electrode is formed within the semiconductor substrate and adjacent the control electrode. The first current electrode has a first predetermined semiconductor material. A second current electrode is formed within the semiconductor substrate and adjacent the control electrode to form a channel within the semiconductor substrate. The second current electrode has a second predetermined semiconductor material that is different from the first predetermined semiconductor material. The first predetermined semiconductor material is chosen to optimize bandgap energy of the first current electrode, and the second predetermined semiconductor material is chosen to optimize strain of the channel.
摘要:
A method for forming a semiconductor device (10) creates a dielectric layer (18) with high dielectric constant. An interfacial layer (14) is formed over a semiconductor substrate (12). A dielectric layer (16) is formed over the interfacial layer, wherein the dielectric layer has a high dielectric constant (K). The dielectric layer is thinned, such as by etching or chemical mechanical polishing, wherein a thickness of the thinned dielectric layer is less than a thickness of the dielectric layer prior to thinning. In one form, the method is used to form a transistor having a gate electrode layer formed over the thinned dielectric layer and source/drain diffusions (24, 26) within the semiconductor substrate.
摘要:
Methods for fabricating integrated circuits are provided. In an embodiment, a method for fabricating an integrated circuit includes providing a semiconductor substrate and forming a gate structure on the semiconductor substrate. The gate includes a high-k dielectric material. In the method, a fluorine-containing liquid is contacted with the high-k dielectric material and fluorine is incorporated into the high-k dielectric material.
摘要:
A CMOS device is provided which comprises (a) a substrate (103); (b) a gate dielectric layer (107) disposed on the substrate, the gate dielectric comprising a metal oxide; (c) an NMOS electrode (105) disposed on a first region of said gate dielectric; and (d) a PMOS electrode (115) disposed on a second region of said gate dielectric, the PMOS electrode comprising a conductive metal oxide; wherein the surface of said second region of said gate dielectric comprises a material selected from the group consisting of metal oxynitrides and metal silicon-oxynitrides.
摘要:
A mixture of materials can be used within a layer of an electronic device to improve electrical and physical properties of the layer. In one set of embodiments, the layer can be a dielectric layer, such as a gate dielectric layer or a capacitor dielectric layer. The dielectric layer can include O, and two or more dissimilar metallic elements. In one specific embodiment, two dissimilar elements may have the same single oxidation state and be miscible within each other. In one embodiment, the dielectric layer can include an alloy of (HfO2)(1-x)(ZrO2)x, wherein x is between 0 and 1. Each of Hf and Zr has a single oxidation state of +4. Other combinations are possible. Improved electrical and physical properties can include better control over grain size, distribution of grain sizes, thickness of the layer across a substrate, improved carrier mobility, threshold voltage stability, or any combination thereof.