摘要:
Chemical vapor deposition on a semiconductor wafer is obtained in a plasma reactor having a plurality of lamps for radiantly heating the wafer. Calibrated temperature sensing means remote from the wafer is used to control the heating of the wafer. Gases are supplied by way of a plurality of tubes extending radially inwardly from the sides of the chamber. A baffle is provided to form an antechamber which aids in the uniformity of the deposition. The plasma is ignited for less than the whole deposition cycle for deposition of tungsten disilicide.
摘要:
An improved spacer means for separating and inhibiting the shorting together of conductive plates in an RF plasma reactor used in Plasma Enhanced Chemical Vapor Deposition (PECVD) processing of semiconductor devices. The improved spacer means inhibits the accumulation of conductive films on the surface of the separating means by substantially precluding the plasma field, and hence, inhibiting depositions in areas where recessed grooves are in the surface of the separating means. Accordingly, a direct electrical path on the spacer means between the multiple conductive plates of the RF plasma reactor is inhibited. As a result, the reactors can run for longer periods of time and deposit greater thicknesses of conductive films without the conductive plates shorting together causing shutdown of the process.
摘要:
A process for producing a novel graphite fluoride type film on the surface of an aluminum substrate in which an aluminum substrate and a carbonaceous material or polycarbon monofluoride represented by the formula (CF).sub.n are heated in an atmosphere of fluorine gas. The film has a luster, and not only exhibits high degree of hydrophobicity but also has corrosion resistance to aqueous solutions of acid and alkali as well as a mechanical strength.
摘要:
Pollutant emissions produced in the manufacture of asphaltic roofing are controlled by the use of electrified bed filters. Filter bed granules coated with pollutants are removed from the beds periodically and are used in the manufacture of the roofing. A prefilter is employed to remove varnishing pollutant components in the supermicron size range to prevent fouling of an electrical charger.
摘要:
A composite metal wire saw having a thin wire core and integral therewith hard cutting crystals with cutting edges projecting irregularly from the wire core surface. The cutting crystals form a layer between 1.5 and 10 .mu.m. Preferably, the composite saw has an intermediate fine-grained layer between 1 and 5 .mu.m and being thinner than the surface layer. The composite saw is prepared by heating the core wire and depositing the cutting crystals from the vapor phase.
摘要:
The photomask blank comprises a transparent substrate, a first chromium film formed on the substrate by sputtering, a second chromium film formed on the first chromium film by vacuum evaporation and a chromium oxide film by vacuum evaporation. The relative thickness of the two chromium films and the chromium oxide film is adjusted to improve resolution of a pattern and to decrease reflectance.
摘要:
A composite polymeric material having metallic surface properties is prepared by subliming solid crystalline polymeric sulfur nitride to a vapor, and thereafter condensing the polymeric sulfur nitride vapor onto the surface of a highly-oriented thermoplastic polymeric substrate to thereby form on the substrate an epitaxial crystalline polymeric sulfur nitride film. The polymeric sulfur nitride film is completely oriented parallel to the direction of orientation of the substrate and has a relatively high degree of anisotropy with respect to its electrical conductivity and optical properties.
摘要:
Method of coating a surface of an article comprises steps of carbonizing organic material to provide a flexible elongated electrically conductive heater element, forming a solid coating of a vaporizable coating material on said element, positioning the said article and heater element in a vacuum chamber with said heater element stretched between two spaced electrodes and heating said element by passing electrical current through said electrodes and heating element to vaporize the vaporizable coating thereon.
摘要:
High-strength fiber is prepared by coating a small grain, small diameter polycrystalline refractory oxide fiber with a specified amount of a glass-forming oxide or its precursor, and heating the coated fiber at a temperature sufficient to decompose the precursor to the oxide and/or to vitrify the oxide coating into an adherent, optically uniform, thin layer. The coating significantly increases the tensile strength of the fiber, while the fiber retains a substantial percentage of its original modulus. The fibers are especially suitable for reinforcement uses.
摘要:
A powdery mixture of cobalt hydroxide, aluminium oxide, and oxides which absorb substantially no visible light, preferably silicon dioxide, is vacuum evaporated in an oxidizing atmosphere and deposited on a base material and subsequently heat treating at approximately 300*C. The coating of the base material thereby obtained is a hard, well adherent, pure blue colored and transparent film. The proportions of the principal components of the primary mixture used for evaporation are 30 to 40 percent of cobalt hydroxide and 5 to 15 percent of aluminium oxide, the refractive index of the whole mixture is approximately equal to the refractive index of the base material and the thickness of the film produced is approximately 1/1000 mm.