摘要:
A method for improving high-&kgr; gate dielectric film (104) properties. The high-&kgr; film (104) is subjected to a two step anneal sequence. The first anneal is a high temperature anneal in a non-oxidizing ambient (106) such as N2 to densify the high-&kgr; film (104). The second anneal is a lower temperature anneal in an oxidizing ambient (108) to perform a mild oxidation that heals the high-&kgr; film and reduces interface defects.
摘要:
A method is provided for forming dual work function gate electrodes. A dielectric layer is provided outwardly of a substrate. A metal layer is formed outwardly of the dielectric layer. A silicon-germanium layer is formed outwardly of the metal layer. A first portion of the silicon-germanium layer is removed to expose a first portion of the metal layer, with a second portion of the silicon-germanium layer remaining over a second portion of the metal layer. A silicon-germanium metal compound layer is formed from the second portion of the silicon-germanium layer and the second portion of the metal layer. A first gate electrode comprising the first portion of the metal layer is formed. A second gate electrode comprising the silicon-germanium metal compound layer is formed.
摘要:
N2O is used as the oxidant for forming an ultra-thin oxide (14). The low oxidation efficiency of N2O compared to O2 allows the oxidation temperature to be raised to greater than 850° C. while maintaining the growth rate. A cold wall lamp heater rapid thermal process (RTP) tool limits reaction to the surface of the wafer (10). Hydrogen is preferably added to improve the electrical properties of the oxide (14).
摘要:
An embodiment of the instant invention is a method of fabricating an electronic device formed on a semiconductor wafer, the method comprising the steps of: forming a conductive structure over the semiconductor substrate, the conductive structure comprised of an oxygen-sensitive conductor and having an exposed surface; oxidizing a portion of the conductive structure (step 313 of FIG. 1); and subjecting the conductive structure to a plasma which incorporates hydrogen or deuterium (step 315 of FIG. 1).
摘要:
A dry etch using CFx in an O2-rich environment will clean the contact/via at the same time it retracts a layer of TiN enclosed in the dielectric layer, such as the plate layer in a Capacitor-Under-Bitline DRAM cell.
摘要:
A shallow trench isolation structure is formed in a semiconductor substrate adjacent to an active semiconductor region. A selective self-assembling oxygen barrier layer is formed on the surface of the shallow trench isolation structure that includes a dielectric oxide material. The formation of the selective self-assembling oxygen barrier layer is selective in that it is not formed on the surface the active semiconductor region having a semiconductor surface. The selective self-assembling oxygen barrier layer is a self-assembled monomer layer of a chemical which is a derivative of alkylsilanes including at least one alkylene moiety. The silicon containing portion of the chemical forms polysiloxane, which is bonded to surface silanol groups via Si—O—Si bonds. The monolayer of the chemical is the selective self-assembling oxygen barrier layer that prevents diffusion of oxygen to a high dielectric constant material layer that is subsequently deposited as a gate dielectric.
摘要:
A body contacted semiconductor-on-insulator (SOI) metal gate containing transistor that has a reduced parasitic gate capacitance is provided in which a metal portion of a gate stack is removed over the body contact region and a silicon-containing material is formed that contacts the gate dielectric in the body contact region of an SOI substrate. This causes an increase of the effective gate dielectric thickness on the body contact region by greater than 5 angstroms (Å). This results in a lower parasitic capacitance at the body contact region.
摘要:
There is presented a method of forming a semiconductor device. The method comprises forming gate structures including forming gate electrodes over a semiconductor substrate and forming spacers adjacent the gate electrodes. Source/drains are formed adjacent the gate structures, and a laminated stress layer is formed over the gate structure and the semiconductor substrate. The formation of the laminated stress layer includes cycling a deposition process to form a first stress layer over the gate structures and the semiconductor substrate and at least a second stress layer over the first stress layer. After the laminated layer is formed, it is subjected to an anneal process conducted at a temperature of about 900° C. or greater.