219 results about "Ceramic thin films" patented technology

In an apparatus for manufacturing a ceramic thin film by employing a thermal CVD method, an internal jig, which is provided with a heat radiation material film on the surface, is provided at a position that faces a substrate (S) on which the film is to be formed. The thin film and a semiconductor device are manufactured using such apparatus.

In accordance with the present invention, deposition of perovskite material, for example barium strontium titanite (BST) film, by a pulsed-dc physical vapor deposition process or by an RF sputtering process is presented. Such a deposition can provide a high deposition rate deposition of a layer of perovskite. Some embodiments of the deposition address the need for high rate deposition of perovskite films, which can be utilized as a dielectric layer in capacitors, other energy storing devices and micro-electronic applications. Embodiments of the process according to the present invention can eliminate the high temperature (>700° C.) anneal step that is conventionally needed to crystallize the BST layer.

The invention discloses a metal-based composite material with a substrate of a nano laminated structure and a preparation method of the composite material. The particle-reinforced metal-based composite material is prepared from nano flaky metal powder coated with ceramic thin film on the surface and a micrometer ceramic particle reinforcing body as raw materials. The metal-based composite material prepared by the method has the substrate of a metal/ceramic alternate nano laminated structure, and has high interface volume ratio; the ceramic layer can effectively restrict and keep a deformation micro texture, improve dislocation storage and slippage capability, and cause deflection and passivation of crackles, thereby exerting structure toughening benefit; and finally the metal-based composite material is endowed with mechanical properties of high strength and high toughness. The preparation method is simple and feasible, can realize large-scale preparation of large-size composite material, and is contributed to promoting the engineering application of the metal-based composite material.

The invention discloses a ceramic thin film thermocouple and a manufacture method thereof. The ceramic thin film thermocouple comprises a thermocouple conductive ceramic thin film comprising a ceramic thermode layer, wherein the ceramic thermode layer comprises a first thermode and a second thermode which are arranged in a mirror symmetry mode along the center line of the thermocouple conductive ceramic thin film. Both the first thermode and the second thermode comprise lap joint transverse ends for performing lap joint of a hot connection point between the thermodes, lead transverse ends connected with leads and transition vertical portions for enabling the lap joint transverse ends to be connected with the lead transverse ends. The lap joint transverse end of the first thermode and the lap joint transverse end of the second thermode are in lap joint partially to form the hot connection point of the thermocouple. Compared with the ordinary K-shaped thermocouple, the ceramic thin film thermocouple has the advantages of being wide in temperature measurement range and adaptive to oxidation and acid-base environments. Compared with other thermocouples made of high temperature resistant materials, such as platinum and rhodium, the ceramic thin film thermocouple is low in cost in the same temperature measurement range, and applicable to temperature measurement of extreme environments in the fields of space flight and aviation and the like.

The invention provides a preparation method of a high-toughness metal-based nanometer composite material and belongs to the technical field of composite materials. The preparation method provided by the invention comprises the following steps of: firstly, using an atmosphere heat treatment process, generating a layer of a nanometer ceramic thin film on the sheet-shaped metal powder through reaction in-situ; and then carrying out densifying treatment by using a powder metallurgical process, so as to obtain the large compact metal-based composite material. The metal-based composite material prepared by the invention has a metal/ceramic alternative laminated structure, wherein a ceramic layer can be used for effectively restraining the reply of a metal layer and the crystal grain growth, improving the high-position wrong storage capability, keeping a nanometer crystal matrix structure, and causing the rotation and inactivation of fissures, so as to realize mechanical properties matched with the high toughness. The preparation method provided by the invention is simple, convenient and practicable, can be used for realizing the macro-quantized preparation of the large-size composite material, and is good for prompting engineering applications of the metal-based nanometer composite material.

The invention discloses a method for preparing a multilayer ceramic capacitor. The method includes the steps that an isolation thin film is prepared; ceramic thin films are prepared; the ceramic thin films are stacked, and a first substrate is obtained; the ceramic thin films on which inner electrode patterns are printed are prepared; the ceramic thin films on which the inner electrode patterns are printed are stacked, a stacking unit is obtained, the ceramic thin films are stacked on the two sides of the stacking unit respectively, and a second substrate is obtained; the first substrate, the isolation thin film and the second substrate are sequentially stacked and then laminated, and a third substrate is obtained; the third substrate is cut, and the second substrate is completely cut off to form multiple stacked bodies; adhesion removal and sintering are conducted on the third substrate, and the stacked bodies are sintered into a ceramic body; the ceramic body is separated and then chamfered, and two outer electrodes are attached to the two ends of the ceramic body. According to the method for preparing the multilayer ceramic capacitor, in the sintering process, sintering additives in the first substrate volatilize, so that the local atmosphere with high volatilization concentration is formed around the stacked bodies, and the sintered ceramic body is uniform, compact and good in uniformity.

The invention relates to an absorbable suture nail for an anastomat. The absorbable suture nail comprises a suture nail body, a degradable biological ceramic thin film bottom layer and a degradable macromolecule surface layer, wherein the suture nail body is made of medical degradable magnesium alloy wire materials, the degradable biological ceramic thin film bottom layer is attached on the surface of the magnesium alloy wire materials, and the degradable macromolecule surface layer is used for sealing holes. By the aid of surface double-layer protection formed by the degradable ceramic coating layer and the macromolecule thin film and hole sealing effect of an organic coating layer to the surface of an inorganic ceramic coating layer, the absorbable suture nail for the anastomat can be improved effectively, degrading speed of the suture nail is controlled, and the suture nail can be degraded and absorbed completely in in-vivo environment. Meanwhile, at early stage of postoperation, the suture nail has indispensable acid-resisting or alkali-resisting corrosive performance so as to resist early corrosion damage in the strong acid environment of the stomach and is applicable to anastomosis and suture after various operations in vivo, particularly alimentary canal operation.

The invention relates to a photovoltaic cell module and a manufacturing method thereof. An interconnection lead wire of the photovoltaic cell module is connected with a thin grid line and a function ceramic thin film through cured type conducting slurry. According to the manufacturing method of the photovoltaic cell module, the interconnection lead wire coated with the cured type conducting slurry is attached to the surface of a cell piece in a pressing mode, and then curing is carried out; or the cured type conducting slurry is printed on the surface of the cell piece, then the interconnection lead is attached to the cured type conducting slurry in a pressing mode, and connecting of the thin grid line, the function ceramic thin film and the interconnection lead wire is achieved by curing; or a main grid line formed by curing of the cured type conducting slurry is arranged on the surface of the cell piece of the photovoltaic cell module. The photovoltaic cell module and the manufacturing method thereof have the advantages that the interconnection lead wire does not need to be connected with the cell piece through the high-temperature-sintered traditional main grid line, so that the processing step can be well simplified, and the performance of the cell piece is improved; and scaling powder and a protecting thin film are of no need, and the long-time stability of a component is improved.

A method for preparing nanocrystalline ceramic thin films, particularly at low firing temperatures <1000° C. The method for preparing ceramic thin films comprises preparing a seed gel of metal oxide, dissolving a source compound for cations of the oxide's metal constituents in the solution, then adding a polymerizable organic solvent to the solution and heating to form a polymeric precursor having uniformly dispersed gel seeds within a solid gel structure whereby any voids within the structure are filled with metal cation-containing polymeric precursor. The polymeric precursor is free of precipitates. A surface of a substrate is then coated with at least one layer of the gel-seeded polymeric precursor to form a uniform film of gel-seeded polymeric precursor wherein the film has a thickness of 100 nm to 200 nm per layer. The film is then sintered to convert the film to a nanocrystalline ceramic thin film having a thickness of 100 nm to 1 mum and being substantially free of defects.

A method is provided for low temperature deposition of ceramic thin films of carbides, nitrides and mixed phases such as carbo-nitrides by atomic layer deposition (ALD), nano-layer deposition (NLD), and chemical vapor deposition (CVD). The deposition chemistries employ combinations of precursors to affect thin film processes at substantially lower temperatures than current deposition processes of thin films of boron (B) carbides, nitrogen (N), nitrides, carbonitrides of silicon (Si), carbon (C), germanium (Ge), phosphorus (P), arsenic (As), oxygen (O), sulfur (S), and selenium (S) on substrates. The inventive ALD and corresponding NLD and CVD process methods provide lower temperature deposition of various thin films comprising elements from the group B, C, Si, Ge, N, P, As and O, S and Se. The reactive precursor combinations are selected on the basis of reactivity towards one another as determined by the variation of Gibb's free energy (ΔG) with respect to deposition temperature.

A method for depositing a ceramic thin film by sputtering is provided to increase deposition rate of the ceramic thin film and to enhance the uniformity of a deposited thin film, which are accomplished by positioning a nonconductive target within a vacuum chamber, and applying an AC/RF power to the target to produce plasma within the chamber, followed by the application of a hybrid power in combination of an AC/RF power and a DC power to the target to proceed a sputtering process inside the vacuum chamber, such that the ceramic thin film is deposited on a substrate placed in the vacuum chamber.

The invention relates to a ceramic thermistor and a manufacturing method thereof, and particularly relates to a micro NTC (negative temperature coefficient) thermistor and a manufacturing method thereof. The thermistor manufactured by ceramic thin films is formed by clamping parallel metal wire leads between two layers of the ceramic thin films, integrally connecting the ceramic thin films with the metal wire leads via a process of 'hot isostatic pressing', then placing the ceramic thin films in a kiln and sintering at a high temperature, wherein the sintering temperature is 900-1200 DEG C, and the sintering time is 3-5 hours; and the used ceramic thin films are prepared from a ceramic slurry via a casting process, and the prescription of the ceramic slurry is decided by the types of thermistors. The manufacturing method of the thermistor comprises the following steps of: cutting the ceramic thin films, hot-pressing and compounding the ceramic thin films with the metal wire leads, parting off the ceramic thin films (with the leads), as well as sintering and packaging a ceramic component.

The invention discloses a continuous production and sintering device for a self-supported ceramic thin film, and relates to a ceramic thin film. The continuous production and sintering device is provided with a high-temperature furnace system and a sample conveying system. The high-temperature furnace system is provided with a furnace body, a heating device and a vacuum device. The furnace body is provided with a hearth, a heat insulation layer and a vacuum layer. The hearth is divided by the heat insulation layer into a sample introduction chamber, a sintering chamber, a cooling chamber and a sample collection chamber. The heating device is provided with a thermocouple and a temperature controller. The vacuum device is provided with an inner furnace vacuum pump and a vacuum layer vacuum pump. The sample conveying system is provided with a sample introduction chamber sample winding device, a sample conveying device and a sample collection chamber sample winding device. The sample introduction chamber sample winding device is provided with a film winding drum, a fixing rod, a bearing, a motor shaft gear, a bearing gear and a film winding drum motor. The sample conveying device is provided with a sample carrier table, a fixing rod, a bearing, a motor shaft gear, a bearing gear, a big gear wheel, a conveying device motor, a chain and a conveying belt. The sampling chamber sample winding device is provided with a film winding drum, a fixing rod, a bearing, a motor shaft gear, a bearing gear and a film winding drum motor.

The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics, which can be employed for forming a dielectric ceramic thin film required for a small-sized capacitor which enables production of a small-sized electronic apparatus; and a process for producing the barium titanate. When a titanium oxide sol is reacted with a barium compound in an alkaline solution containing a basic compound, the basic compound is removed in the form of gas after completion of reaction, and the resultant reaction mixture is fired, a barium titanate having a large BET specific surface area and a high tetragonality content is produced.