Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a sufficiently uniform layer regarding layer thickness, stoichiometry, and electrical characteristics, and for manufacturing a ferroelectric or paraelectric solid layer by vapor deposition. SOLUTION: In the method for manufacturing the crystalline solid layer on a substrate by the vapor deposition, at least one assistant other than a departure gas containing the element of the solid layer that can be deposited is introduced into a reaction chamber. In this case, the assistant has a dipole moment, and contains a molecule adhering onto the surface of the substrate having the dipole moment in a vertical direction to the surface of the substrate quickly during a deposition process, thus determining the crystal structure of the solid layer in advance.
Abstract:
A trench capacitor (30) is arranged in a first trench (25) for production of a semiconductor memory (5). A first longitudinal trench (55) is arranged in the substrate (15) next to the first trench (25) and parallel thereto on the other side of the first trench (25), a second longitudinal trench (60) is arranged therein. A first spacer word line (70) is arranged in the first longitudinal trench (55) and a second spacer word line (75) is arranged in the second longitudinal trench (60). Connecting webs (80) are arranged in the first trench (25) between the first spacer word line (70) and the second spacer word line (75) with a thickness (110), which is smaller in the direction of the first spacer word line (70) than half the width of the first trench (25) in the direction of the first spacer word line (70).
Abstract:
Dielectric focus ring (10) is intended for wafer (2) in processing position on electrostatic chuck (3) in plasma etching appliance. Chuck contains electric contact with electrode. Between focus ring potential and wafer potential can exist potential difference .Structure (11) for targeted influencing of potential profile inside focus ring contains at least one material with other property than dielectric part of focus ring, such as other dielectric constant and/or conductivity.
Abstract:
An annular microstructure element, in particular an annularly arranged monolayer or multilayer thin film, is formed over a substrate (S), e.g., for use in a magnetoresistive memory. To that end, a masking layer is applied over the substrate. An opening (C) is etched into the masking layer, so that a partial region of the surface is uncovered. The etching operation is performed in such a way that the opening (C) is formed with an overhang (B). The overhang at least partially shades the uncovered surface from an incident particle beam (TS). A particle beam (TS) is directed at the substrate (S) at an oblique angle (alpha) of incidence. In this case, the substrate (S) is rotated relative to the directed particle beam (TS). From the particle beam, material is thereby deposited annularly on the uncovered surface for the purpose of forming a hole-like microstructure element (R).
Abstract:
Production of a conductor strip over a stepped substrate region of an integrated circuit, especially a word line in semiconductor memories, comprises depositing a first tungsten nitride/tungsten layer (11) over the stepped substrate region (1) made from polysilicon up to approximately half the nominal layer thickness of the strip; and depositing a second tungsten nitride/tungsten layer (12) over the first tungsten nitride/tungsten layer to reach the nominal layer thickness of the strip using ionized PVD without or under reduced substrate bias. Preferred Features: The process further comprises structuring the two tungsten nitride/tungsten layers. The voltage of the substrate bias is selected so that the tungsten nitride/tungsten material is re-sputtered from the base of a shallow trench isolation.
Abstract:
An arrangement for carrying out a plasma-based process includes a process chamber (1) in which a plasma can be generated, a substrate carrier (4) positioned within the process chamber (1) and on which a substrate (3) with a substrate upper face (5) is arranged. A magnetic field can be generated in the process chamber (1) between the plasma (2) and the substrate upper face (5) and has a magnetic field component (6) extending parallel to the substrate upper face (5). The magnetic field component (6) specifically rotates about an axis perpendicular to the upper face (5) of the substrate, and is generated by a coil (9) carrying a current. More specifically, the magnetic field component (6) is generated using a permanent magnet (10).
Abstract:
Buried straps are produced on one side in deep trench structures. A PVD process is used to deposit masking material in the recess inclined at an angle. As a result, a masking wedge is produced on the buried strap, on one side in the base region of the recess. The masking wedge serves as a mask during a subsequent anisotropic etching step, which is carried out selectively with respect to the masking wedge, for removing the buried strap on one side.
Abstract:
An arrangement for atomic layer deposition starting from precursor compounds, comprises a reactor chamber (201) with a substrate holder and a heater. A pump (205) is used to supply a vacuum in the reaction chamber, and the precursor compound container is connected to the chamber. The pump is located between the container and the reactor chamber. The arrangement has a carrier gas source, a gas chamber and a flushing gas source.