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4961958 Process for making diamond, and doped diamond films at low temperature  
A process and apparatus that may be used for the production of diamond and doped diamond films at high rates by activated reactive vapor deposition. Carbon is evaporated in a vacuum chamber in the...
4959201 Green diamond and method of producing the same  
A green diamond has a nitrogen content in its crystals within the range of 5×1016 to 3×1019 atoms/cm3, an absorption coefficient of H2 centers at a wavelength of 800 nm within the range of 0.3 to...
4958592 Resistance heater for diamond production by CVD  
A plural substrate CVD apparatus for diamond crystal production utilizes spaced apart vertical, parallel, planar substrate panels with an electrical (direct current, D.C.) resistance filament...
4950625 Diamond laser crystal and method manufacturing the same  
A method of manufacturing a diamond laser crystal having an excellent laser efficiency is performed by first, preparing a synthetic type Ib diamond containing at least 60 volume percent of a (111)...
4950463 Purple diamond and method of producing the same  
A purple diamond has an absorption coefficient of the Ib type nitrogen at 500 nm, within the range of 0.2-2 cm-1, an absorption coefficient of the N-V center at an absorption peak of 570 nm,...
4948629 Deposition of diamond films  
Diamond films are deposited at substrates below temperatures of 400° C. by chemical vapor deposition using a high powered pulsed laser and a vapor which is an aliphatic carboxylic acid or an...
4949347 Diamond laser, method for producing the same, and method for activating such a laser  
A diamond laser formed of a synthetic diamond provides a high output power and a variable wavelength in the near infrared region. The maximum value of the optical density of H2 centers in the...
4938940 Vapor-phase method for synthesis of diamond  
A method for vapor-phase synthesis of diamond comprises burning a raw material compound for synthesis of diamond thereby forming a combustion flame, disposing a substrate for deposition of diamond...
4932331 Novel single-bond carbon film and process for the production thereof  
There is provided a novel single-bond carbonic film, matrix of which comprises carbon atoms and which is characterized by having a peak A at 1340±20 cm-1 and a peak B at 1580±10 cm-1 in Raman...
4927619 Diamond single crystal  
An artificial diamond single crystal, at least a part of a surface of the crystal having a rough surface which diffusibly reflects light which is formed by suppressing crystal growth at that...
4915977 Method of forming a diamond film  
A method of forming a diamond film on a substrate wherein hydrogen, a hydrocarbon series gas, an inert gas, an organic compound series gas or a mixture of such gases is introduced into a vacuum...
4880613 Light emitting element comprising diamond and method for producing the same  
A light emitting element comprising diamond which contains N-V color centers in a maximum optical density of of 0.01 to 3.5 in a direction of excitation light, Ib type nitrogen atoms in a maximum...
4874596 Production of crystalline structures  
An apparatus and method for reacting on material by means of intense radiation employed to change the physical and, in certain instances, the chemical characteristics of such material. In one...
4871581 Carbon deposition by ECR CVD using a catalytic gas  
A material consisting mainly of carbon can be formed on a surface by virtue of a microwave energy. A catalyst gas is introduced into a reaction chamber for ECR CVD, along with a carbon compound...
4869924 Method for synthesis of diamond and apparatus therefor  
This invention provides a method for synthesis of diamond by contacting a substrate with a mixed gas of carbon source gas and hydrogen gas activated by irradiation with microwave to produce...
4859493 Methods of forming synthetic diamond coatings on particles using microwaves  
An apparatus and method for applying hard surface coatings to articles of manufacture such as particles, filaments, sphereoids, rollers, bearings, tools, and assemblies. In one form, coating of...
4849199 Method for suppressing growth of graphite and other non-diamond carbon species during formation of synthetic diamond  
Methods are provided for suppressing the growth of graphite and other non-diamond carbon species during the low pressure deposition of carbon to form diamond. In one method, the graphite or other...
4836881 Process for synthesizing large diamond  
A process for synthesizing a large diamond having a diameter of 8 mm or more by the temperature gradient method, wherein a (111) or (100) surface of a seed crystal having a diameter of 3 mm or...
4830702 Hollow cathode plasma assisted apparatus and method of diamond synthesis  
The present invention includes an apparatus and method for depositing diamond on a substrate. A hydrocarbon/hydrogen gas mixture is passed through a refractory metal hollow cathode which is self...
4816286 Process for synthesis of diamond by CVD  
A synthesizing process for diamond by the chemical vapor phase growth method, characterized by converting an organic compound containing carbon, hydrogen and at least one of oxygen and nitrogen,...
4767608 Method for synthesizing diamond by using plasma  
A method for synthesizing diamond, which comprises: (a) generating a plasma by electric discharge in a gas selected from the group consisting of a hydrocarbon gas, hydrogen gas, an inert gas and a...
4740263 Process for preparing thin film and p-type diamond semiconductor  
A process for preparing a diamond thin film by an electron assisted chemical vapor deposition (EACVD) is disclosed, in which diamond crystal nuclei are caused to form and grow to a thin film on a...
4632817 Method of synthesizing diamond  
A diamond synthesizing method carried out under diamond-stable superhigh pressure and temperature by employing a synthesizing vessel (10) having a plurality of synthesizing chambers (10a, 10b)...
4617181 Synthetic diamond heat sink  
A synthetic diamond heat sink which can be easily shaped and which ensures a consistently high thermal conductivity in which the diamond is a Type Ib diamond containing 50 to 100 ppm nitrogen. The...
4578260 Method for purifying diamond  
Diamond can be easily purified from a powdery mixture of diamond and graphite by heating the mixture together with ammonium nitrate and at least one metal oxide of lead monoxide, trilead...
4563341 Method and means for converting graphite to diamond  
A host liquid, such as a liquid metal, which is "seeded" with small bubbles of an inert gas, is maintained in a sealed chamber at an ambient temperature of about 100° K. above the melting point of...
4551195 Method for growing boron nitride crystals of cubic system  
Cubic boron nitride crystals are grown by subjecting reaction materials of low pressure phase boron nitride, a solvent material, and cubic boron nitride seeds to pressure and temperature...
4547257 Method for growing diamond crystals  
Diamond crystals are grown by subjecting reaction materials of nondiamond carbon, a solvent metal, and diamond seeds to pressure and temperature conditions in the diamond-stable region. The...
4544540 Diamond single crystals, a process of manufacturing and tools for using same  
An artificial diamond single crystal, a process for producing it, and tools for utilizing it are disclosed. The artificial diamond crystal has at least one surface which has a rough surface formed...
4536442 Process for making diamond and cubic boron nitride compacts  
Optical windows for hostile environments have been made from diamond and adamantine boron nitride compacts. The compact windows can comprise a single layer of large crystals bonded in a matrix....
4522680 Method for producing crystals  
A method for producing crystals of materials is described. The method comprises providing a pressure-resistant body having a nucleus of a starting material being crystallized in the inside...
4518659 Sweep through process for making polycrystalline compacts  
The high pressure/high temperature catalyst sweep through process for making diamond and cubic boron nitride compacts has been improved by adding an intermediate metal or metal alloy. The added...
4504519 Diamond-like film and process for producing same  
An amorphous, carbonaceous, diamond-like film and a process for producing the same is disclosed. The film has an extremely low hydrogen content and an extremely low stress, is resistant to both...
4495044 Diamondlike flakes  
A carbon coating (36) is vacuum arc deposited on a smooth surface of a target (10) which is simultaneously ion beam sputtered. The bombarding ions have sufficient energy to create diamond bonds....
4490229 Deposition of diamondlike carbon films  
A diamondlike carbon film is deposited in the surface of a substrate by exposing the surface to an argon ion beam containing a hydrocarbon. The current density in the ion beam is low during...
4485080 Process for the production of diamond powder  
Diamond powder is produced without using an ultra-high pressure apparatus by a process comprising melting carbon and a metal capable of dissolving carbon to form a liquid, subjecting the liquid to...
4483836 Method of producing diamond and/or diamond-like modifications of boron nitride  
A method of producing diamond and/or diamond-like modifications of boron nitride from a material to be transformed, such material being carbon and/or boron nitride, with the use of explosive...
4481180 Diamond synthesis process  
The present invention relates to a diamond synthesis process.A stack of graphite and alloy pellets of at least one metal of group VIII or VII of the periodic system with an element having the same...
4437962 Diamondlike flake composites  
A carbon coating (36) is vacuum arc deposited on a smooth surface of a target (10) which is simultaneously ion beam sputtered. The bombarding ions have sufficient energy to create diamond bonds....
4434188 Method for synthesizing diamond  
A method for synthesizing diamond wherein hydrogen gas which has passed through a micro-wave non-electrode discharge and mixed with hydrocarbon gas, or a mixture gas consisting of hydrocarbon and...
4425315 Diamond sintered compact wherein crystal particles are uniformly orientated in the particular direction and the method for producing the same  
The invention relates to a diamond sintered compact wherein diamond crystal particles are uniformly orientated in a particular direction and the method for producing the same, and has for an...
4412980 Method for producing a diamond sintered compact  
The invention relates to a diamond sintered compact wherein diamond crystal particles are uniformly oriented in a particular direction and the method for producing the same, and has for an object...
4409712 Method for making a stylus having a graphite electrode  
A diamond body is heated in an environment of vacuum of inert gas containing a small amount of oxygen at a predetermined elevated temperature to allow the carbon atoms of the surface areas to form...
4406871 Process for growing diamonds  
A process for growing diamonds from carbonaceous compounds at high temperatures and pressures within the range of thermodynamic stability of diamond in the presence of metals-catalysts-solvents...
4399364 Diamond treatment  
A method of reducing the color of diamond of type 1b including the steps of exposing the diamond to irradiation capable of causing atomic displacements in the diamond, for example the irradiation...
4377565 Process for producing diamond powder by shock compression  
A diamond powder is produced by a shock compressing method using a carbon precursor obtained by an organic compound such as furan resin, its derivative, a thermosettable resin, as a carbon source.
4352787 Ultra-hard particles of carbon produced by reacting metal carbide with non-metal halide in hot melt system  
The production of ultra-hard particles composed substantially of carbon as the dominant element is taught. The ultra-hard particle comprises a covalently bonded lattice structure produced by...
4322396 High pressure reaction vessel for growing diamond on diamond seed and method therefor  
Reaction vessel construction is described for suppressing spontaneous diamond nucleation and simultaneously reducing the flaw content in the main body of diamond grown from diamond seed material...
4287168 Apparatus and method for isolation of diamond seeds for growing diamonds  
Reaction vessel construction is provided whereby in the practice of the invention disclosed in U.S. Pat. No. 3,297,407 - Wentorf, Jr. diamond seed material is isolated from the main supply of...
4277293 Growth of synthetic diamonds having altered electrical conductivity  
A method of growing a diamond crystal which comprises bombarding the diamond with a flux of carbon ions of sufficient energy to penetrate the diamond crystal and cause crystal growth which is at...