摘要:
Aluminum alkoxide or aluminum aryloxide is produced by dissolving aluminum in gallium and/or gallium-based alloy wherein the gallium and/or gallium-based alloy is in a liquid form. The aluminum is then reacted with an organic compound having at least one reactive hydroxyl group to thereby obtain the aluminum alkoxide or aluminum aryloxide.
摘要:
The invention is a room-temperature dry process for texturing copper on polyester, to improve adhesion of coatings to the copper surface through mechanical as well as chemical bonding. An iodine plasma is produced by backfilling an evacuated chamber with iodine and applying an RF potential. The iodine plasma includes both positive and negative iodine ions. Unprotected surface areas of the copper form a copper iodide; when the copper iodide is removed, the remaining surface is highly textured. The associated polyester is not damaged. The copper iodide is conveniently removed by a 10% hydrochloric acid solution which has no damaging effects on the associated polyester or on the metallic copper, or on associated polyester in a plastic laminated with copper.
摘要:
Photon energy can be efficiently absorbed by a material having a reflectivity control surface region wherein the index of refraction, the thickness, and the contour of the external surface of the reflecting control surface region operate to curtail all reradiation components.
摘要:
A solid state renewable energy supply is provided by the oxidation of a passivating oxide forming solid state material in the presence of oxygen under the control of a passivating oxide preventing agent forming thereby an oxide reaction product, heat and hydrogen. The oxide reaction product is then electrolytically or thermo chemically reduced to recover the solid state material. Aluminum is hydrolized in the presence of gallium producing aluminum oxide, heat and hydrogen. The aluminum oxide is in turn electrolyzed back to aluminum.
摘要:
A high brightness, essentially monoenergetic electron source is constructed in solid state material by providing a semiconductor body with an electron confinement barrier over most of the surface, the barrier having a relatively small opening exposing the semiconductor body, in the relatively small opening a material is placed in contact with the semiconductor body that has a work function that is lower than the energy of excited electrons in the semiconductor. In this structure electrons from hole-electron pairs generated in the semiconductor are repelled and recombination is inhibited by the barrier except in the relatively small opening where they are injected into the surrounding environment through the lower work function material. The hole-electron pair generation may be by irradiation or by electrical injection. The electron source is useful for such applications as high brightness sources, digital communications, cathode ray tube electron sources and scanning electron microscopes.
摘要:
A substantially optically transparent article such as a lens having a wear-resistant surface comprises a substantially optically transparent polymeric substrate (e.g., a polycarbonate or polymethyl methacrylate substrate), and having a surface portion. A hard antiabrasive interconnecting layer is formed on the surface portion (typically by vacuum deposition and preferably by plasma-enhanced chemical vapor deposition), and a lubricious hydrophobic coating layer is bonded to the interconnecting layer. The lubricious hydrophobic coating layer, together with the hard antiabrasive interconnecting layer, form a wear-resistant surface on the substrate. The lubricious coating layer is formed from a hydrophobic organic lubricant such as a perfluoropolyether, a fatty acid, or a fatty acid esters. Methods of making such articles are also disclosed.
摘要:
Capping a low resistivity metal conductor line or via with a refractory metal allows for effectively using chemical-mechanical polishing techniques because the hard, reduced wear, properties of the refractory metal do not scratch, corrode, or smear during chemical-mechanical polishing. Superior conductive lines and vias are created using a combination of both physical vapor deposition (e.g., evaporation or collimated sputtering) of a low resistivity metal or alloy followed by chemical vapor deposition (CVD) of a refractory metal and subsequent planarization. Altering a ratio of SiH.sub.4 to WF.sub.6 during application of the refractory metal cap by CVD allows for controlled incorporation of silicon into the tungsten capping layer. Collimated sputtering allows for creating a refractory metal liner in an opening in a dielectric which is suitable as a diffusion barrier to copper based metalizations as well as CVD tungsten. Ideally, for faster diffusing metals like copper, liners are created by a two step collimated sputtering process wherein a first layer is deposited under relatively low vacuum pressure where directional deposition dominates (e.g., below 1 mTorr) and a second layer is deposited under relatively high vacuum pressure where scattering deposition dominates (e.g., above 1 mTorr). For refractory metals like CVD tungsten, the liner can be created in one step using collimated sputtering at higher vacuum pressures.
摘要:
A method and apparatus are disclosed for conducting a physical process and a chemical reaction by exposing a material containing a volatile substance to microwave radiation where the morphology of said material will change when exposed to such radiation. The power of said radiation is adjusted over time as the morphology of the material changes to maximize the effect of the radiation in order to produce a product in a minimum amount of time that is substantially free of said volatile substance.The method and apparatus can also be used to conduct such a process or reaction with materials that do not contain a volatile material.In one embodiment a method and apparatus are disclosed for manufacturing a polyimide from a precursor in a solvent by exposing the precursor to microwave radiation in a tuneable microwave resonant cavity that is tuned during imidization to achieve critical coupling of the system. Microwave power is controlled to remove the solvent and obtain the desired level of reaction. Processing time has been reduced thirty fold as compared to conventional thermal methods.
摘要:
A metallic hollow cathode electrode structure for use in a RF-RIE sputter/etch system. The electrode defines a critical aspect ratio hollow cathode volume. In accordance with one embodiment of the invention, the electrode structure may consist of two closely spaced metal elements separated by a distance of a few centimeters. The elements are electrically and structurally connected by supports around their outer rim. An RF voltage is applied between the improved hollow cathode electrode structure and an evacuated chamber containing same through a suitable matching network. A plasma gas is supplied to the system from a point outside the electrodes and a suitable pumping system is used to maintain operating pressures in the 0.1 to 400 millitorr range. Samples to be sputtered are then placed on either of the inside electrode surfaces for sputter/etching. The aspect ratio (longest dimension of one of the elements/spacing between the elements) should be at least 4.According to a further embodiment, the hollow cathode electrode structure is characterized by a single plate having a plurality of cylindrical chambers or holes therein, each hole producing a hollow cathode glow when the system is energized. The aspect ratio (largest dimension of the chamber cross-section/depth of the chamber) for this embodiment should be at least 1.5.
摘要:
A plasma sputter etching/deposition system comprising an electron-emitting hollow cathode arc-source combined with a conventional plasma sputter etching/deposition system such as a magnetron. The electrons emitted are coupled into the intrinsic high energy, e.g., magnetic field and are accelerated by the plasma potential and cause a significant increase plasma density. The resultant combination allows much greater sputtering/deposition efficiency than was possible with previous devices. According to a further aspect of the invention, switched operation is possible, whereby etching may vary from isotropic to anisotropic. A side discharge hollow cathode structure is also described for enhancing certain sputtering/deposition processes, wherein electrons may be emitted from one or more openings at the side of a hollow cathode chamber to achieve more uniform electron emission in a large process chamber.