摘要:
An integrated microelectronic circuit has a multi-layer interconnect structure overlying the transistors consisting of stacked metal pattern layers and insulating layers separating adjacent ones of said metal pattern layers. Each of the insulating layers is a dielectric material with plural gas bubbles distributed within the volume of the dielectric material to reduce the dielectric constant of the material, the gas bubbles being formed by ion implantation of a gaseous species into the dielectric material.
摘要:
A method of processing a workpiece includes introducing an optical absorber material precursor gas into a chamber containing the workpiece, generating an RF oscillating toroidal plasma current in a reentrant path that includes a process zone overlying the workpiece by applying RF source power, so as to deposit a layer of an optical absorber material on the workpiece, and exposing the workpiece to optical radiation that is at least partially absorbed in the optical absorber layer.
摘要:
A plasma immersion ion implantation process for implanting a selected species at a desired ion implantation depth profile in a workpiece is carried out in a reactor chamber having a set of plural parallel ion shower grids that divide the chamber into an upper ion generation region and a lower process region, each of the ion shower grids having plural orifices in mutual registration from grid to grid, the plural orifices oriented in a non-parallel direction relative to a surface plane of the respective ion shower grid. The process includes placing a workpiece in the process region, the workpiece having a workpiece surface generally facing the surface plane of the closest one of the plural ion shower grids, and furnishing the selected species into the ion generation region. The process further includes evacuating the process region, and applying plasma source power to generate a plasma of the selected species in the ion generation region. The process also includes applying successive grid potentials to successive ones of the grids and applying a bias potential to the workpiece. The combination of the grid and bias potentials corresponds to the desired ion implantation depth profile in the workpiece.
摘要:
A reactive sputter deposition process is carried out in a reactor chamber having a set of plural parallel ion shower grids that divide the chamber into an upper ion generation region and a lower process region, each of the ion shower grids having plural orifices in mutual registration from grid to grid, each orifice being oriented in a non-parallel direction relative to a surface plane of the respective grid. A workpiece is placed in the process region, the workpiece having a workpiece surface generally facing the surface plane of nearest one of the ion shower grids. The process includes sputtering deposition precursor species from a sputter target comprising a semiconductor species in the ion generation region, applying RF plasma source power to the ion generation region so as to generate a plasma of the deposition precursor species sputtered from the target, applying successive grid potentials to successive ones of the grids to create a flux of ions through at least some of the plural grids, and furnishing a gas species into the reactor chamber for combining with the semiconductor atoms to form molecules that deposit on the workpiece surface.
摘要:
A plasma reactor for processing a semiconductor workpiece includes a reactor chamber and an ion shower grid dividing the chamber into an upper ion generation region and a lower process region, the ion shower grid having plural orifices oriented in a non-parallel direction relative to a surface plane of the grid. A workpiece support in the process region has a workpiece support surface in facing relationship to the ion shower grid. The reactor further includes a reactive species source for introducing into the ion generation region a chemical vapor deposition precursor species, a vacuum pump coupled to the process region, a plasma source power applicator for generating a plasma in the ion generation region and a grid potential source coupled to the ion shower grid. The orifices through the grid have an aspect ratio sufficient to limit ion trajectories in the process region to a narrow angular range about the non-parallel direction and a resistance to gas flow sufficient to support a pressure drop of at least a factor of about 4 across the grid.
摘要:
A plasma reactor for processing a semiconductor workpiece includes a reactor chamber and a set of plural parallel ion shower grids that divide the chamber into an upper ion generation region and a lower reactor region, each of the ion shower grids having plural orifices in mutual registration from grid to grid, each orifice being oriented in a non-parallel direction relative to a surface plane of the respective ion shower grid. A workpiece support in the process region faces the lowermost one of the ion shower grids. A reactive species source furnishes into the ion generation region a chemical vapor deposition precursor species. The reactor further includes a vacuum pump coupled to the reactor region, a plasma source power applicator for generating a plasma in the ion generation region and a grid potential source coupled to the set of ion shower grids. The orifices through at least some of the ion shower grids have an aspect ratio sufficient to limit ion trajectories in the reactor region to a narrow angular range about the non-parallel direction, and a resistance to gas flow sufficient to support a pressure drop between the ion generation and reactor regions of about at least a factor of 4. The grid potential source can be capable of applying different voltages to different ones of the grids.
摘要:
A process for conformally doping through the vertical and horizontal surfaces of a 3-dimensional vertical transistor in a semiconductor-on-insulator structure employs an RF oscillating torroidal plasma current to perform either conformal ion implantation, or conformal deposition of a dopant-containing film which can then be heated to drive the dopants into the transistor. Some embodiments employ both conformal ion implantation and conformal deposition of dopant containing films, and in those embodiments in which the dopant containing film is a pure dopant, the ion implantation and film deposition can be performed simultaneously.
摘要:
A method of fabricating a semiconductor-on-insulator structure from a pair of semiconductor wafers, includes forming an oxide layer on at least a first surface of a first one of the wafers and performing a bonding enhancement implantation step by ion implantation of a first species in the first surface of at least either of the pair of wafers. The method further includes performing a cleavage ion implantation step on one of the pair of wafers by ion implanting a second species to define a cleavage plane across a diameter of the wafer at the predetermined depth below the top surface of the one wafer. The wafers are then bonded together by placing the first surfaces of the pair of wafers onto one another so as to form an semiconductor-on-insulator structure. The method also includes separating the one wafer along the cleavage plane so as to remove a portion of the one wafer between the second surface and the cleavage plane, whereby to form an exposed cleaved surface of a remaining portion of the one wafer on the semiconductor-on-insulator structure. Finally, the cleaved surface is smoothed, preferably by carrying out a low energy high momentum ion implantation step.
摘要:
A system for processing a workpiece includes a plasma immersion implantation reactor with an enclosure comprising a side wall and a ceiling and defining a chamber, and a workpiece support pedestal within the chamber having a workpiece support surface facing the ceiling and defining a process region extending generally across the wafer support pedestal. The reactor includes a gas distribution apparatus for introducing a process gas containing a first species to be ion implanted into a surface layer of the workpiece, and inductively coupled source power applicator, and an RF plasma source power generator coupled to the inductively coupled source power applicator for inductively coupling RF source power into the process zone. The reactor further includes an RF bias generator having an RF bias frequency and coupled to the workpiece support pedestal for applying an RF bias to the workpiece. The system further includes a second wafer processing apparatus, and a wafer transfer apparatus for transferring the workpiece between the plasma immersion ion implantation reactor and the second wafer processing apparatus.
摘要:
A plasma reactor for processing a workpiece includes a chamber adapted to accept processing gases in an evacuated environment including a workpiece support, a hollow conduit defining a wall of the chamber, and having respective ends opening adjacent opposite sides of the workpiece support, and a chamber wall portion in facing relationship to the workpiece support and defining a workpiece processing zone therebetween, the processing zone and the interior of the conduit forming a torroidal interior path, and an RF energy applicator irradiating gas within the chamber to maintain a plasma within the torroidal interior path.