89 results about "Grown film" patented technology

Growth of multilayer films is carried out in a manner which allows close control of the strain in the grown layers and complete release of the grown films to allow mounting of the released multilayer structures on selected substrates. A layer of material, such as silicon-germanium, is grown onto a template layer, such as silicon, of a substrate having a sacrificial layer on which the template layer is formed. The grown layer has a lattice mismatch with the template layer so that it is strained as deposited. A top layer of crystalline material, such as silicon, is grown on the alloy layer to form a multilayer structure with the grown layer and the template layer. The sacrificial layer is preferentially etched away to release the multilayer structure from the sacrificial layer, relaxing the grown layer and straining the crystalline layers interfaced with it.

The invention relates to a multi-ion-beam sputter-deposition technology for doping a diamond-like carbon (DLC) coating. The technology is characterized by comprising the following steps of: firstly, washing to removing a polluted layer on the surface of a workpiece by utilizing ultrasonic waves, and carrying out ion beam bombardment washing on the surface of the workpiece by utilizing an argon-ion beam generated by an ion source to obtain an atomic scale clean surface; then preparing a gradient transition layer by utilizing an auxiliary ion beam sputter-deposition method; and finally, synthesizing a multi-element doped DLC coating on the gradient transition layer by utilizing multi-ion-beam sputtering and low-energy ion beam auxiliary deposition. In the process of synthesizing the multi-element doped DLC coating by utilizing the multi-ion-beam sputtering and the low-energy ion beam auxiliary deposition, carbon particles and metallic particles which are generated by bombarding a graphite target and a metallic target are deposited by using a sputtering ion source, and gas ions generated by an auxiliary deposition ion source continuously bombard the surface of a grown film layer to regulate and control the microstructure of the film layer and realize multi-element doping.

A Group III-nitride semiconductor film containing aluminum, and methods for growing this film. A film is grown by patterning a substrate, and growing the Group III-nitride semi-conductor film containing aluminum on the substrate at a temperature designed to increase the mobility of aluminum atoms to increase a lateral growth rate of the Group III-nitride semiconductor film. The film optionally includes a substrate patterned with elevated stripes separated by trench regions, wherein the stripes have a height chosen to allow the Group III-nitride semiconductor film to coalesce prior to growth from the bottom of the trenches reaching the top of the stripes, the temperature being greater than 1075° C., the Group III-nitride semiconductor film being grown using hydride vapor phase epitaxy, the stripes being oriented along a (1-100) direction of the substrate or the growing film, and a dislocation density of the grown film being less than 10⁷ cm⁻².

A surface acoustic wave element includes a piezoelectric substrate made of a LiNbO₃ or LiTaO₃ single crystal, a base electrode layer disposed on the piezoelectric substrate and primarily including at least one of Ti and Cr, and an Al electrode layer primarily including Al disposed on the base electrode layer. The Al electrode layer is an epitaxially grown film with an orientation, and has a twin crystal structure exhibiting six-fold symmetry spots in an XRD pole figure. The average grain size of the Al electrode layer is about 60 nm or less.

An organic semiconductor crystalline film and weak oriented epitaxy growth preparation method thereof. The organic semiconductor crystalline film is a n-type semiconductor or a p-type semiconductor, and organic semiconductor crystal molecules in the organic semiconductor crystalline film are oriented in a stand-up manner on the ordered substrate, and have an oriented relationship with the ordered substrate. The organic semiconductor crystalline film prepared by the present invention is useful for organic transistor and organic phototransistor devices. The method of the present invention can control the high carrier mobility direction of organic semiconductor crystals to have ordered orientation in the film, enhance contacts between crystals, improve mechanical strength and micro-machining property of the film, and give a high carrier mobility. The carrier mobility of weak oriented epitaxially grown film of the present invention is 0.32 cm²/Vs, which is 5 times as large as that of a vapor phase deposited film, and is similar to that of single crystal. The present invention is adapted to glass substrates and plastic substrates.

A nitride semiconductor laser element comprises a nitride semiconductor substrate and a nitride semiconductor layer laminated thereon, wherein the nitride semiconductor substrate has a high dislocation density region and a low dislocation density region containing lower dislocation than that of the high dislocation density region, and has at least one recess formed in at least the high dislocation density region, the nitride semiconductor layer has a first nitride semiconductor layer in which the grown film thickness in the lateral direction from the side faces of the recess in the substrate is greater than the grown film thickness in the heightwise direction from a region other than the recess, and a second nitride semiconductor layer that is disposed on the first nitride semiconductor layer and contains indium, and the first nitride semiconductor layer and second nitride semiconductor layer have recess over the recess in the nitride semiconductor substrate.

The invention discloses a method of preparing a warp-free group-III nitride composite substrate and a substrate placing device. A substrate with both sides polished is erected on the substrate placing device and placed in a reaction chamber, a group-III nitride film or microstructure is grown on the both sides at the same time in an epitaxial manner to form a buffer layer, thick-film group-III nitride is grown on the both sides at the same time, and the epitaxial thickness of one side of the AL surface of sapphire is slightly greater than the epitaxial layer thickness of one side of the O surface. The substrate placing device is a multi-piece graphite frame, and comprises a base, a hole, rollers, and slots. The substrate can be rotated, and the uniformity in thickness of the grown films is ensured. Warping is inhibited, the quality of crystal is improved, and the obtained composite substrate can be used as a group-III nitride quasi-homogeneous epitaxial substrate to prepare related optoelectronic devices. According to the invention, the space of the reaction chamber is fully utilized, the production cost is reduced, the process is simple and easy to control, and different substrates can be selected and a variety of equipment can be used to grow a variety of thick-film group-III nitride substrates.

The present invention provides methods forming the superconductor of as-grown film of MgB.sub.2 which is made with magnesium and boron ejected from a magnesium target and a boron target respectively each in simultaneously sputtering process. The as-grown film composed of a compound of magnesium and boron is a superconductor without annealed. The present invention can be applied to fabricate an integrated circuit of superconductor film, because the high temperature annealing process for the as-grown film of MgB.sub.2 is not needed.

A method includes forming an as-grown film of a superconductor composed of a MgB₂ compound which is made by simultaneous evaporation of magnesium and boron. The as-grown film is superconductive without an annealing process to make the film superconductive. The method can be applied to fabricate an integrated circuit of the superconductor film, because a high temperature annealing process to make the as-grown film superconductive is not needed.

The invention discloses a preparation method of a transferable perovskite oxide piezoelectric texture film for promoting crystallization by graphene. The preparation method comprises the following steps: 1) graphene is selected as an interlayer material of an oxide and a substrate; and 2) a pulse laser deposition technology is selected to use as a film growth method; the growth temperature is controlled within 500-800 DEG C; the oxygen partial pressure is controlled within 10-20 Pa; the laser energy is controlled within 1.5-3 J/cm2; and the frequency is 1-10 Hz. The prepared film with a perovskite structure is analyzed by X-ray diffraction (XRD), an atomic force microscope (AFM) and a piezoelectric force microscope (FPM); the film obtained by growth has excellent texture crystallization characteristic; the film layer thickness is controllable within 300 nm; the film surface is smooth; the RMS roughness is within 1 nm; and the grown film achieves the piezoelectricity and the potential of transferring to any substrate.

The invention belongs to the field of electrochemical preparation of a thermoelectric material, and relates to a method for electrochemically preparing a thermoelectric film by using a seeding layer, which comprises the following steps: preparing a seeding layer having a nano-level thickness on a substrate through molecular beam epitaxy, magnetron sputtering and other modes; and electrochemically growing a thermoelectric film material, wherein the thickness of the film can be of the nano level. By using the method, the growth orientation of the epitaxial film can be controlled, and a thermoelectric film having an obviously column structure orientation is prepared, so that the thermoelectric properties of the electrochemically grown film can be improved. Due to the self characteristics of electrochemistry such as low cost and convenient growing process, a material preparation foundation is provided for the assembly of a thermoelectric device in future.

The invention discloses a semiconductor material for nitride of group III and its growing directions, which belongs to the field of semiconductor technology. The said method is composed of: forming a heat-resistant mask layer on the semiconductor substrate; growing the epilayer homogeneous with the said substrate on the said heat-resistant mask layer by epitaxial method; oxidize the said semiconductor into the oxidation furnace and eliminate the heat-resistant mask to form impending pattern homogeneous with the said substrate; Taking the said impending pattern as the base, growing the epitaxis of the nitride of group III to form the semiconductor material for nitride of group III, which comprises a substrate, impending pattern on the base of the substrate formed by epitaxial technology and the epitaxis of the nitride of group III on the impending pattern by epitaxial technology of the nitride of group III. The invention lowers the growing cost and reduces the stress between growing-finishing grown film and substrate through the impending pattern, thus to grow flawless thick film.

The invention relates to the technical field of epitaxial film preparation of zinc oxide of semiconductor materials and discloses a silicon-based compliant substrate material with thin hafnium nitride compliant layer. The material includes the following components: a single crystal silicon substrate which is used for supporting the whole silicon-based compliant substrate material; a thin hafnium nitride compliant layer, whose preparation is on the single crystal silicon substrate and is used for adjusting mismatch strain of epitaxial grown film of zinc oxide. By adopting the invention, mismatch strain of epitaxial film of zinc oxide on silicon substrate can be adjusted and residual stress be reduced, thus improving the crystal quality and surface appearance and laying a foundation for research of silicon-based optoelectronic devices.

The invention discloses a ZnxCo1-x-ZIF-67 membrane and a preparation method thereof, wherein the preparation method comprises the following steps of: growing a layer of ZIF-8 seed crystal on the surface of a porous support in advance, and using the ZIF-8 seed crystal as an induction core of the growth membrane to prepare a continuous ZnxCo1-x-ZIF-67 membrane; the prepared ZnxCo1-x-ZIF-67 membranecan be used in the technical field of H2/CO2, H2/N2, H2/CH4 and other gas separation. According to the ZnxCo1-x-ZIF-67 membrane and a preparation method thereof, the ZIF-8 crystal grains grow on the surface of the porous support body to be used as the seed crystal for growing the ZnxCo1-x-ZIF-67 film, so that the problem that the seed crystal is easy to fall off due to insufficient bonding strength of the seed crystal layer and the porous support body can be effectively solved; and the preparation conditions adopted by the method are mild, the process is simple and controllable, the prepared ZnxCo1-x-ZIF-67 film has stable chemical structure and performance, excellent gas separation performance, wide application prospect and great theoretical and practical significance.

The invention discloses a preparation method of a silicon-doped HfO2-based ferroelectric film, and belongs to the technical field of material preparation. The preparation method comprises the steps that by taking yttrium-doped zirconia as a substrate, firstly the substrate is cleaned and annealed to fully remove internal stress and surface organic matters of the substrate; then, by taking self-made Si-doped HfO2 as a target, a Si-doped HfO2-based film grows on the surface of the substrate by a pulsed laser molecular beam epitaxy method in an ultra-vacuum state; and then the grown film is annealed in situ in an oxygen atmosphere to obtain the stable Si-doped HfO2-based film. By adopting the pulsed laser deposition epitaxy method in combination with a reflective high-energy electron diffractometer for real-time monitoring, and by optimizing oxygen pressure, laser energy, the substrate temperature and the annealing temperature, precise control on atomic-scale epitaxial growth of the filmis realized; the preparation method has the advantages of high purity and controllable layered structure; and ideas are provided for ferroelectric research on the Si-doped HfO2-based film.

A vapor-phase growth apparatus includes: a reaction furnace which is hermetically closable, a wafer container which is disposed in the reaction furnace, for disposing a wafer at a predetermined position, a gas supply member for supplying a source gas toward the wafer, and a heating member for heating the wafer, wherein the apparatus is designed to form a grown film on a front surface of the wafer by supplying the source gas in a high temperature state while the heating member heats the wafer in the reaction furnace through the wafer container. The wafer container includes: a heat flow control section having a space for disposing a wafer; and a heat flow transmitting section joined to the heat flow control section, for transmitting heat to the wafer disposed in the space; and contact heat resistance R_g between the heat flow control section and the heat flow transmitting section is not less than 1.0×10⁻⁶ m²K/W to not more than 5.0×10⁻³ m²K/W, and the heat flow control section is made of a material having a coefficient of thermal conductivity which is not less than 5 times to not more than 20 times that of the wafer disposed on the heat flow transmitting section.

The invention relates to the field of researches on two-dimensional layered materials, in particular to a method for obtaining a single-crystal boron nitride film through ion beam sputtering deposition. The method comprises the following steps: ultrasonically cleaning a single crystal substrate by using acetone, ethanol and deionized water in sequence; immersing the cleaned single crystal substrate into a hydrofluoric acid solution for treatment; placing a high-purity Ni target on a target position of a direct-current magnetron sputtering instrument, and epitaxially growing a Ni (111) orientedfilm on the single crystal substrate; fixing a nickel/single crystal substrate on a sample support, putting the sample support into a growth chamber of ion beam sputtering deposition equipment, and carrying out film growth through hydrogen and argon treatment; and cooling the grown film to obtain the large-size single-crystal boron nitride film.

A vapor-phase growth apparatus includes: at least a reaction furnace which is hermetically closable, a wafer container which is disposed in the reaction furnace, for disposing a wafer at a predetermined position, a gas supply member for supplying a source gas toward the wafer, and a heating member for heating the wafer, wherein the apparatus is designed to form a grown film on a front surface of the wafer by supplying the source gas in a high temperature state while the heating member heats the wafer in the reaction furnace through the wafer container. The wafer container is made of a single material or a single member, and has a ratio R₂/R₁, which is not less than 0.4 to not more than 1.0, where R₁ is a heat resistance for a heat transfer route from a rear surface of the wafer container toward the front surface of the wafer, and R₂ is a heat resistance for a heat transfer route from the rear surface of the wafer container toward a front surface of the wafer container.

The invention belongs to the technical field of superconducting film materials, provides a preparation method of an infinite layer type nickelate film with a superconducting characteristic, and aims to solve the problems that the film in the prior art is low in deposition speed, has cracks, is easy to fall off, is difficult to operate, and the like. The preparation method comprises the following steps: firstly, preparing a nickelate target material to match a pulse laser deposition method; growing a single crystal perovskite type nickelate (Nd0.8Sr0.2NiO3) film on a SiTO3 substrate by a pulse laser deposition method, so that the operation is simple, the grown film is highly consistent with the components of a target material, the elements of perovskite type nickelate in the film are uniformly distributed, the surface of the film is smoother, the thickness is uniform, the combination is tight, and the use performance is better; and finally, carrying out annealing reduction to obtain the infinite layer type nickelate (Nd0.8Sr0.2NiO2) film with the superconducting characteristic. According to the invention, the method is easy to operate, low in preparation cost and good in repeatability, and the prepared film is good in compactness, high in stability, high in adhesive force and high in growth speed.

The invention discloses an AlGaN film grown on an Si substrate, a preparation method and an application thereof. The AlGaN film grown on the Si substrate comprises an Si substrate body and an epitaxially grown film body on the Si substrate body; the crystal orientation of the Si is that the surface 111 deviates from 100 by 0.5 to 1 degree. The AlGaN film grown on the Si substrate is prepared through growing the AlGaN film through a pulsed laser deposition technique, growing an Al atom layer through a metal organic chemical vapor deposition technique, carrying out nitrogen treatment on the Al atom layer, selecting the substrate and the crystal orientation and the like. The AlGaN film is used for a photoelectric detector or an LED device. The AlGaN film grown on the Si substrate solves the crack problem of a GaN film on the Si substrate, enables the AlGaN film quality, purity and interface property to be improved and enables the technique cost to be lowered.