142 results about "Primitive cell" patented technology

The invention reveals that endogenous cholesterol metabolic product cholestane-3 beta, 5 alpha, 6 beta-triol (YC-5) has protection function for neuronal damage caused by cerebral ischemia, ischemia ofspinal cord, epileptic seizure and convulsion and relates to an application of YC-5 in preparation of neuronal protection medicine. The YC-5 can be prepared from cholesterol through two steps. The primitive cell culture in vitro and spinal cord ischemia animal model proves that YC-5 has protection function for neuronal damage caused by cerebral ischemia, ischemia of spinal cord, epileptic seizureand convulsion. YC-5 in effective dose has no toxic and side reactions. YC-5 is an effective neural protectant which aims to multiple molecular mechanism and cures cerebral ischemia damage, spinal cord ischemia damage, epileptic seizure and convulsion.

The invention provides a method used for determining Bravais lattice of unknown crystal by electron backscatter diffraction. The invention is characterized in that the method comprises the steps as follows: 1) an electron backscatter diffraction spectrum is obtained and the crystal diffraction information in the diffraction spectrum is measured; 2) a two-dimensional reciprocal surface of the crystal is obtained; 3) a three-dimensional reciprocal primitive cell is reconstructed by the two-dimensional reciprocal surface; 4) the cell parameter of the three-dimensional reciprocal primitive cell s worked out according to the width of the Kikuchi band and the angle between the Kikuchi bands in the same Kikuchi electrode; 5) a reciprocal reduced cell of the crystal is solved; 6) the Bravais lattice of the crystal is determined in the reciprocal space; 7) the Bravais lattice of the crystal is determined. In the method, only a scanning electron microscope and an electron backscatter diffraction accessory are used to realize the analysis on unknown lattice of bulk crystals, and the exponential of the Kikuchi band and the Kikuchi electrode in the electron backscatter diffraction spectrum is marked at the same time. The method has no special requirement on the samples to be analyzed, is suitable for quickly analyzing bulk samples, and can be used for analyzing the microstructure morphologies and crystal structure in the buck samples.

The invention discloses a shield grid trench MOSFET device.In grid electrode structures of primitive cells, shield electrodes are formed after epitaxial layers filling trenches are etched back, and trench grids are formed at the tops of the shield electrodes; the shield electrodes and adjacent drift regions make direct contact, carrier balance is achieved, the shield electrodes of the primitive cells and the drift regions form alternately-arranged structures in the transverse direction, and the shield electrodes carry out transverse exhausting on the adjacent drift regions in reverse bias of the device.The invention further discloses a manufacturing method of the shield grid trench MOSFET device.According to the shield grid trench MOSFET device and the manufacturing method, it is unnecessary to arrange dielectric films at the bottoms of the shield electrodes, stepping of device units can be reduced, the specific on-resistance of the device can be reduced, manufacturing difficulty can be lowered, and the uniformity of device performance can be improved.

Any primitive cells or blocks can be represented physically by a Barycenter compact model (or Barycenter model), and any black box model can also be physically represented by a Barycenter compact model physically. A hierarchical boundary condition between blocks is formulated by the Barycenter compact model. Hierarchical boundary condition problems between blocks can be limited within two levels only if using the Barycenter compact model.

The invention discloses a calculation method for improving the photocatalytic properties of the ZnO (0001) surface through Fe atom doping and adsorption. The method includes the steps of constructingthe primitive cells of ZnO body material in MS software, optimizing the structure, and constructing ZnO (0001) surface supercells and doping and adsorption models of Fe atoms at different loci on thepure ZnO (0001) surface; conducting structural optimization and GGA+U method calculation on the surface, selecting the energy band structure, the state density, the optical properties and the accuracycorresponding separately, and conducting calculation on each model; analyzing each model through a CASTEP module, obtaining the formation energy, optical property constant and work function of the ZnO (0001) surface doped and adsorbed by the Fe atoms, and obtaining the electronic structure and the optical property corresponding to each model. Therefore, the photocatalytic activity of the ZnO (0001) surface in the visible light range is improved, and certain reference is provided for the practical application of ZnO photocatalysis.

The invention discloses a low frequency broad-band gap 3D phonon crystal for vibration damping noise reduction; the phonon crystal comprises a plurality of primitive cells that are periodically arranged; the primitive cell comprises 6 same 2D chiral structures; the chiral structure comprises a disc and four connecting rods; the axis of the connecting rod is orthogonal to that of the disc; one endof the connecting rod is connected with the disc periphery; the 4 connecting rods encloses the disc and are symmetrically arranged in a rotary mode; the 6 2D chiral structures are connected via the connecting rod end portions so as to form a hexahedron; the rotary directions of the chiral structures on two mutually parallel surfaces are opposite to each other; two adjacent chiral structures are mutually vertical to each other. The phonon crystal not only has a low frequency broad-band gap property energy zone structure, and is simple in preparation, thus reducing the structure complexity, improving the structure vibration damping stability, and providing a new path for the vibration damping noise reduction.

The invention discloses a method and a device for realizing wave absorbing of graphene at a visible light waveband, and belongs to the field of photoelectric detection and micro-nano optical, mechanical and electrical systems. A multi-groove structure provided by the invention is a periodic micro-structure, a primitive cell (a basic unit of the structure) of the periodic micro-structure is formedby a plurality of narrow metal grooves with the same width and different depths, a dielectric coating layer is filled into the grooves and above the grooves, and the graphene is deposited above the dielectric coating layer. For TM polar incident light waves, due to a cavity resonance effect of the grooves, the grooves with different depths correspond to different graphene light absorption wavelengths, and broadband absorption of the graphene at the visible light waveband can be realized through combination of the grooves with the different depths. In addition, an absorption spectrum of a waveabsorber is insensitive to the change of an incident angle, and even the incident angle is obviously changed, the graphene still has excellent broadband light absorption performance; and the method and the device have an application prospect in the fields such as light modulators, solar cells, touch screens, biological sensing and the like.

The invention discloses a method for realizing an all-optical diode. In a two-dimensional photonic crystal waveguide, a micro-cavity is designed on the side; and a dielectric column primitive cell is additionally arranged as a reflective layer in the photonic crystal waveguide near the micro-cavity, and the position of the reflective layer is a lattice constant deviated from the position where the waveguide is over against the micro-cavity. When the incident light intensity increases all along, the forward incident light first reaches a power threshold for exciting the nonlinear Kerr effect of the micro-cavity material, and the backward incident light is in a cut-off state under the light intensity, so as to realize the forward conduction/backward cut-off function of the all-optical diode. The working band of the all-optical diode can be adjusted by adjusting the lattice constant, and the all-optical diode is easy to be integrated in an all-optical network, so that the all-optical diode has a great application value. The all-optical diode has a response time on the order of picosecond, and the photonic crystal has the characteristic of adjusting the forbidden band range according to the lattice constant of the photonic crystal.

The invention provides a semiconductor device with a super junction structure. The semiconductor device comprises an N-type doped semiconductor substrate and an N-type doped epitaxial layer, wherein the N-type doped semiconductor substrate and the N-type doped epitaxial layer are sequentially arranged from bottom to top, and a first P-type filling well region, a second P-type filling well region and a third P-type filling well region are arranged inside the N-type doped epitaxial layer. A first P-type doping region is arranged on the upper side of the first P-type filling well region and provided with an N-type doping region, and a second P-type doping region is arranged on the upper side of the second P-type filling well region. A terminal pressure-withstanding structure T is arranged on the periphery of a primitive cell source electrode region C, wherein the terminal pressure-withstanding structure T comprises the second P-type filling well region, the second P-type doping region, the third P-type filling well region and the corresponding part of the N-type doped epitaxial layer, and the primitive cell source electrode region C comprises the first P-type filling well region, the first P-type doping region, the N-type doping region and the corresponding part of the N-type doped epitaxial layer. The parts, corresponding to polycrystalline silicon arranged in a part of dielectric layer above a gate oxide layer, of the terminal pressure-withstanding structure T and the primitive cell source electrode region C form a gate electrode structure and a polycrystalline silicon field plate structure respectively.

The invention discloses an SiC MOSFET component of a slant channel. A primitive cell structure of an active region of the SiC MOSFET component sequentially comprises a drain electrode, an n++ substrate, an n-drifting layer, two p-well layers arranged in left and right symmetry, a p++ region, an n++ region and a source electrode from bottom to top; the opposite side of the p-well layer is in an arc shape inclined upwards, secondary epitaxy p-type layers which incline toward the vertical central axis of the primitive cell structure are arranged above the arc part of the p-well layer, an injected n layer is arranged between the two secondary epitaxy p-type layers, and an arch-shaped gate oxide layer, an arch-shaped polycrystalline silicone layer and an arch-shaped isolated passivation layer are sequentially arranged above the secondary epitaxy p-type layer and the injected n layer. The invention provides a making method of the SiC MOSFET component of the slant channel. A crystal face with high electron mobility serves as the plane of the channel, the channel is formed in a high-quality secondary-epitaxy SiC surface, the quality of an MOS grating can be effectively improved, the channel mobility can be effectively improved, and on-resistance of the component can be reduced.

A photonic crystal of a two-dimensional graphene-like duplex structure comprises a tabulate base part. Primitive cell units are periodically arranged on the tabulate base part, and each primitive cell unit comprises a first dielectric medium and a second dielectric medium. Each primitive cell unit comprises a hexagon prism-shaped hollow structure which is formed by one first dielectric medium and a cylindrical dielectric cylinder which is axially arranged in each hexagon prism-shaped hollow structure, each hexagon prism-shaped hollow structure is filled with one second dielectric medium, and each second dielectric medium is filled into the gap between the corresponding hexagon prism-shaped hollow structure and the cylindrical dielectric cylinder. The cylindrical dielectric cylinders are arranged between the adjacent primitive cell units, and the cylindrical dielectric cylinders are made of the first dielectric media. The structure parameter is optimized, so that the maximal TE band gap rate of 55.89% is obtained so far. According to the photonic crystal of the two-dimensional graphene-like duplex structure, the duplex structure is introduced, compared with a simple periodic structure, forbidden band modulating controllability is higher, and it is of great significance to designing and manufacturing two-dimensional photonic crystals.

The invention discloses an X-ray diffraction in-situ characterization method of film orientation crystal growth. The in-situ characterization method comprises the steps of firstly utilizing a symmetrical reflective scanning method to measure out-plane diffraction peak position of a film and determining an out-plane orientation characteristic of the film; then utilizing an asymmetrical reflective scanning method to obtain the diffraction peak position of a crystal face set near a predicted orientation based on initial primitive cell parameters, wherein crystal faces of the crystal face set form inclined included angles with a substrate; calculating out the difference delta between the diffraction peak position obtained by measurement and a prediction value based on the initial primitive cell parameters and continuously reducing the delta through lattic parameter correction and loop iteration calculation until the delta is small enough to obtain more accurate lattic parameter information. According to the X-ray diffraction in-situ characterization method disclosed by the invention, a computer-assisted calculating method is utilized, high enough analysis accuracy can be obtained within several seconds, and output data can be directly utilized as an input value of the next measuring period; thus, a high-speed dynamic measuring and analyzing system is formed.

The invention provides a high-voltage LED chip structure and a manufacturing method thereof. The high-voltage LED chip structure comprises a plurality of LED chip particles and primitive cell isolation grooves formed between every two adjacent LED chip particles, wherein each primitive cell isolation groove comprises a connecting area primitive cell isolation groove and a non-connecting area primitive cell isolation groove, and the width of the non-connecting area primitive cell isolation groove is smaller than that of the connecting area primitive cell isolation groove in the direction of a connecting line of centers of two adjacent LED chip particles; and the inclination of the side wall of the non-connection area primitive cell isolation groove is greater than that of the side wall of the connection area primitive cell isolation groove. Therefore, the area of the non-connecting area primitive cell isolation groove is reduced, the area of the light-emitting area is increased, and thelighting effect of the high-voltage LED chip is improved. Due to the fact that the side wall of the connection area primitive cell isolation groove is slow, effective coverage of a bridge connectioninsulation isolation layer and a bridge connection electrode is guaranteed, and the product reliability of the high-voltage LED chip structure is guaranteed.

The invention relates to a two-dimensional liquid-liquid phononic crystal topology optimization method, which comprises the following steps of dividing a phononic crystal primitive cell into an N*N square pixel structure; developing a plane wave expansion method program for quickly calculating a two-dimensional liquid-liquid pixel phononic crystal energy band laid by any material according to an acoustic wave equation satisfied by a two-dimensional liquid-liquid phononic crystal dispersion relationship, and calculating a band gap; and finally, searching the optimal material layout of the two-dimensional liquid-liquid phononic crystal primitive cell according to the requirements on the band gap by utilizing a genetic optimization algorithm. The process comprises the following steps of inputting a parameter to be solved, and initializing; calculating individual fitness; sequentially performing the genetic operations of selection, crossover and mutation to generate the next generation of genus group, so that the genus group evolutes forwards; and checking whether the genus group meets a stop condition. Through the topology optimization method, the designability of phononic crystals is enhanced, and the novel phononic crystal structure with optimal band gap characteristics is obtained; and meanwhile, the calculating time is reduced, and the calculating efficiency is improved, so that the designed phononic crystal has the best technical and economic performances.

The invention discloses regular crystal lattice two-dimension photon crystal with absolute forbidden band at low frequency area under fifth energy level. Primitive cell is divided into square pixel structure with 10*10 high and low refractive index dielectric material distributed in the primitive cell pixel of which 1 represents high refractive index dielectric material; 0 represents low one. The primitive cell structure of the invention satisfies inversion symmetry. When a lattice constant is 1mum, the relative value of the forbidden band under the fifth energy level for silicon/air material is 10.28%.

The invention relates to a two-dimensional solid-solid phononic crystal XY mode topological optimization method, which comprises the following steps of inputting a problem parameter to be solved, and initializing; calculating a dispersion relationship of a phononic crystal primitive cell XY mode corresponding to each genetic individual to obtain a corresponding forbidden band value by using an improved fast plane wave expansion method; according to an optimized goal, using phononic crystal forbidden bands to build an objective function, and then using the value of the objective function to measure the fitness of the genetic individuals; sequentially performing the genetic operations of selection, crossover and mutation to generate the next generation of genus group, so that the genus group evolutes forwards; and checking whether the genus group meets a stop condition. The traditional experience design idea is eliminated, and the goal of actively designing a phononic crystal structure according to the band gap needs is achieved, so that the designability of phononic crystals is enhanced, and the novel phononic crystal structure with optimal band gap characteristics is obtained; and meanwhile, the calculating time is reduced, and the calculating efficiency is improved, so that the designed phononic crystal has the best technical and economic performances.

The layout verification apparatus includes: a verification unit for obtaining mask data indicating a mask pattern to be drawn on a mask based on layout and wiring data indicating positions of a group of primitive cells and positions of connection wires connected to the group of primitive cells, and for verifying a position of the mask pattern based on the mask data, so as to detect an error part; and a correction hint creating unit for creating correction hint information based on the error part, and for sending the correction hint information to a layout and wiring unit for correcting the layout and wiring data. The correction hint creating unit obtains terminal information indicating positions of a group of terminals included in the group of primitive cells and creates the correction hint information based on the terminal information so that the positions of the group of terminals are not changed by the layout and wiring unit.

The invention discloses an MOSFET device, which is applied to the technical field of semiconductors. A primitive cell structure of an active region of the MOSFET device comprises a drain electrode (1), an n+ substrate (2), an n-type buffer layer (3), an n-drift region (4), an n-type JFET region (5), a P base region (6) and an n+ layer (7) in sequence from bottom to top; the primitive cell structure of the active region of the MOSFET device is an asymmetric structure; a groove (8) is formed in the primitive cell structure; one side of the groove (8) is provided with a gate dielectric (9) and apolysilicon gate electrode (10), and the other side of the groove (8) is provided with a P+ region (11) and a source electrode (12); and the polysilicon gate electrode (10) and the source electrode (12) are isolated by a dielectric layer (13). The structure of the device can effectively shield an electric field of the gate dielectric at the bottom of the groove (8), so that the reliability and theservice life of the device are improved and prolonged, and meanwhile, low on resistance and gate-drain capacitance are obtained.

The invention discloses an insulated gate bipolar transistor. Compared with the prior art, polycrystalline silicon filled in a trench is separated by a dielectric layer into an upper polycrystalline silicon layer and a lower polycrystalline silicon layer, the upper polycrystalline silicon layer and the lower polycrystalline silicon layer are mutually contacted with an oxide layer at the upper part of the trench and an oxide layer at the lower part of the trench respectively, the upper polycrystalline silicon layer is connected with a gate electrode, and the lower polycrystalline silicon layer is connected with an emitting electrode; and bottom part of the upper polycrystalline silicon layer in the trench is deeper than a P-type well region of an active primitive cell. The structure disclosed by the invention reduces the Miller capacitance and the turn-on power consumption of the device.