摘要:
The present invention concerns the enhancement of critical current densities in cuprate superconductors. Such enhancement of critical current densities include using wave function symmetry and restricting movement of Abrikosov (A) vortices, Josephson (J) vortices, or Abrikosov-Josephson (A-J) vortices by using the half integer vortices associated with d-wave symmetry present in the grain boundary.
摘要:
The present invention provides a substrate having thereon a patterned small molecule organic semiconductor layer. The present invention also provides a method and a system for producing a substrate having thereon a patterned small molecule organic semiconductor layer. The substrate having thereon a patterned small molecule organic semiconductor layer is produced by exposing a donor substrate having thereon a small molecule organic semiconductor layer to energy to cause the thermal transfer of a small organic molecule onto an acceptor substrate.
摘要:
A liquid crystal display device includes an alignment layer with constituent materials. The constituent materials have a stoichiometric relationship configured to provide a given pretilt angle. Liquid crystal material is provided in contact with the alignment layer. A method for forming an alignment layer for liquid crystal displays includes forming the alignment layer on a substrate by introducing an amount of material to adjust a stoichiometric ratio of constituent materials wherein the amount is determined to provide a given pretilt angle to the alignment layer. Ions are directed at the alignment layer to provide uniformity of the pretilt angle.
摘要:
A method for preparing an alignment layer surface provides a surface on the alignment layer. The surface is bombarded with ions, and reactive gas is introduced to the ion beam to saturate dangling bonds on the surface. Another method for preparing an alignment layer surface provides a surface on the alignment layer. The surface is bombarded with ions and quenched with a reactive component to saturate dangling bonds on the surface.
摘要:
In a Field Effect Transistor (FET) with a semiconductor channel the use of a high Tc oxide superconductor material in the gate electrode provides both control of parasitic resistance and capacitance and a proper work function when operated at a temperature below the Tc. The 1-2-3 compound oxide superconductors with the general formula Y1Ba2Cu3O7-y where y is approximately 0.1 have the ability in use in FET's to provide convenient work functions, low resistance and capacitance, and to withstand temperatures encountered in processing as the FET is being manufactured.
摘要:
High T.sub.c superconducting devices are described in which controlled grain boundaries in a layer of the superconductors forms a weak link or barrier between superconducting grains of the layer. A method is described for reproducibly fabricating these devices, including first preparing a substrate to include at least one grain boundary therein. A high T.sub.c superconductor layer is then epitaxially deposited on the substrate in order to produce a corresponding grain boundary in the superconducting layer. This superconducting layer is then patterned to leave at least two regions on either side of the grain boundary, the two regions functioning as contact areas for a barrier device including the grain boundary as a current flow barrier. Electrical contacts can be made to the superconducting regions so that bias currents can be produced across the grain boundary which acts as a tunnel barrier or weak link connection.
摘要:
A high aspect ratio collimating mask for use in ion beam epitaxy or ion implantation doping is formed through the use of damage-trail-forming materials which are irradiated through a mask and then etched. The high aspect ratio is obtained in part by the sequential formation of a plurality of spaced mask plates. The mask is useful in producing large scale integrated circuits by ion implantation during epitaxial growth of a crystal wafer.
摘要:
In accordance with the disclosure, certain impurities, e.g., alloying additions, are introduced in thin metal film to negate the driving force or the effect of the driving force which causes the hillock formation. Such thin metallic films are usually fabricated on the substrates which have different thermal coefficients of expansion than the film itself, and during thermal cycling stresses can be introduced into the film. This stress may serve as a driving force for atom movement and, therefore, to the formation of hillocks. The vehicle by which the induced stress in a film effects the requisite atom movement is via defect movement, and when the force is compressive this gives rise to hillocks. In the practice of this disclosure, impurity additions introduced into a film affect hillock growth by their interaction with the defects which give rise to the requisite atom movement. Systematically selected impurity additions are introduced into a film during fabrication thereof which inhibit the defect movement in the class consisting of a migration of point defects, linear defects and planar defects wherein the linear defects are dislocations and the planar defects are grain boundaries. Usually, the addition of impurities into a metal film is termed alloying and the resultant film is termed an alloyed film. The alloying addition may be either soluble or insoluble in the film. This will determine the choice of possible modes of fabrication. When the alloy addition is soluble, it is included within the limits of solubility at the temperature at which it is introduced. When the alloy addition is insoluble, it is introduced during fabrication and quantity thereof may be significantly better than the quantity capable of being sustained were the alloying addition and the film to be in thermal equilibrium.
摘要:
Apparatus using amorphous magnetic compositions having uniaxial anisotropy include bubble domain apparatus, light modulating apparatus, permanent magnet systems, and tape and disc information handling systems. The amorphous magnetic composition can be prepared in thin film or bulk form or as particles in a binder. The anisotropy can be parallel to the plane of a film of this material or perpendicular to the film plane. The amorphous material is comprised of a single element or is a multicomponent system where as at least one of the components has an unimpaired spin so that the composition has a net magnetic moment. The amorphous composition exists as a microcrystalline structure having localized atomic ordering over a distance 25-100 A, or as a substantially amorphous structure where localized atomic ordering is over distances less than 25A. Binary and ternary compositions, either alloys or compounds, are suitable. The magnetic properties of the compositions can be changed during fabrication or after fabrication, and the compositions can be doped readily without adversely affecting magnetic properties.
摘要:
Inexpensive semiconductors are produced by depositing a single crystal or large grained silicon on an inexpensive substrate. These semiconductors are produced at low enough temperatures such as temperatures below the melting point of glass. Semiconductors produced are suitable for semiconductor devices such as photovoltaics or displays