40results about How to "Improve stripping yield" patented technology

The invention discloses a light-emitting diode epitaxial wafer and a preparation method thereof, which belong to the photoelectric field. The epitaxial wafer comprises a first buffer layer, a graphene layer, a second buffer layer and an epitaxial structure layer from a substrate to a surface layer; and the epitaxial structure layer is composed of an N-type semiconductor layer, a multiple quantum well layer, a P-type electron blocking layer and a P-type semiconductor layer from the second buffer layer to the surface layer. In comparison with the traditional GaN-based epitaxial wafer structure, the graphene layer is added to enable the GaN-based epitaxial structure layer to be stripped from the substrate by using a mechanical mode, a laser device does not need to be adopted, and the stripping yield is improved; in comparison with other techniques of using a transfer mode to place the graphene layer on the substrate, the buffer layers exist between the graphene layer and the substrate for connection, and the problem of poor adhesion between the graphene layer and the substrate does not exist.

The invention discloses a synthesis method of a two-dimensional transition metal chalcogenide, which comprises the following steps: heating: heating a transition metal compound raw material to a reaction temperature in an inert gas environment; topological conversion reaction step: introducing a gas containing a chalcogen or a mixed gas of the gas containing the chalcogen and the gas containing the phosphorus, and maintaining the reaction temperature for a set period of time, so that the chalcogen, or the chalcogen and the phosphorus are subjected to a topological conversion reaction with the transition metal compound raw material, and generating the two-dimensional transition metal chalcogenide. The synthesis method has the advantages of high reaction degree, high yield, low energy consumption and high efficiency, the obtained two-dimensional transition metal chalcogenide is high in single-layer rate and narrow in layer number distribution, macro preparation can be realized, and the synthesis method has an excellent industrial application prospect.

The invention discloses a Micro-LED chip preparation and substrate stripping method in the field of photoelectric devices. The Micro-LED chip preparation and substrate stripping method comprises the following steps: 1, uniformly coating a transparent substrate with an ultraviolet adhesive; 2, growing an Al2O3 thin film and an LED thin film structure on the transparent substrate coated with the ultraviolet glue; 3, forming discrete Micro-LED structures on the Al2O3 thin film and the LED thin film structure; 4, irradiating the back surface of the transparent substrate by using an ultraviolet surface light source, desensitizing the ultraviolet glue between the transparent substrate and the Al2O3 film, and losing viscosity, thereby achieving the purpose of separating the Micro-LED structure from the transparent substrate, and forming the Micro-LED chip. According to the invention, the micro-LED chip substrate can be rapidly stripped, the working efficiency is high, the cost is low, and the yield is high.

The invention discloses a method and equipment for peeling a layered material and screening and separating two-dimensional nanosheets. The layered material is of a lamellar structure, and is peeled toobtain the two-dimensional nanosheets. The method comprises the following steps: S1, mixing a layered material and a solvent; S2, adding the mixed solution into an emulsifying-dispersing machine forpeeling; S3, introducing the peeled mixed solution into a primary separator for separating to obtain a precipitate containing the non-peeled layered material and a liquid phase part containing two-dimensional nanosheets, carrying out a step S4 on the precipitate, and carrying out a step S5 on the liquid phase part; S4, mixing the precipitate and the solvent again for peeling, carrying out the stepS3 again after peeling, and repeatedly peeling the layered material; S5, conveying the liquid phase part into a secondary for screening and separating. By adopting the method and equipment, the layered material with the lamellar structure is peeled continuously and mechanically, and the two-dimensional nanosheets obtained by peeling are screened and separated, so that two-dimensional nanosheets with a narrow and single size range can be obtained.

The invention discloses a method for preparing a flexible display, comprising the following steps: providing a glass substrate which consists of a first side and a second side opposite to the first side, and forming a flexible display panel on the first side; forming polygonal glass columns on the second side through cutting at intervals; pushing the polygonal glass columns out of the first side on the second side; and lifting off the flexible display panel from the polygonal glass columns to form the flexible display. According to the invention, the flexible display part is lifted off from the glass substrate through the polygonal glass columns formed on the glass substrate, and the flexible display is then lifted off from the polygonal glass columns, so that the flexible display can be well lifted off from the glass substrate. The lift-off method is simple to operate and low in cost, has no adverse effects on light-emitting devices, and can improve the yield of flexible display lift-off.

The invention relates to a semiconductor structure, a preparation method thereof, a self-supporting gallium nitride layer and a preparation method thereof. The preparation method of the semiconductorstructure comprises the steps of providing a substrate; forming a nitride buffer layer on the substrate; and forming a multi-layer graphical mask layer on the nitride buffer layer, wherein materials of a bottom graphical mask layer in the multi-layer graphical mask layer comprise at least one of silicon-based oxide, silicon-based nitride, metal oxide and metal nitride, and the top graphical mask layer is a graphical metal mask layer. According to the invention, self-stripping of the gallium nitride layer formed on the multi-layer graphical mask layer is facilitated; the quality of the galliumnitride layer formed on the multi-layer graphical mask layer is ensured; and the problem of influence on the quality of the gallium nitride layer due to cracking caused by only partial stripping in the stripping process in stripping of the metal mask layer is solved.

The invention belongs to the technical field of chemical material synthesis, in particular to a preparation method of an acid type niobium phosphate oxygen monoatomic layer sheet. The method comprisesthe following steps: preparing acid type niobium phosphate oxygen precursor blocks with a chemical liquid phase synthesis method, and washing and drying the blocks to obtain powder; preparing the acid type niobium phosphate oxygen monoatomic layer sheet with an ultrasonic solvent assisted stripping method. The acid type niobium phosphate oxygen monoatomic layer sheet is uniform and stable ultrathin nanosheet colloid. The prepared acid type niobium phosphate oxygen monoatomic layer sheet has transverse dimension of tens of nanometers to hundreds of nanometers and thickness of about 1 nm, and can realize 10 mg / mL high-concentration stable dispersion in a water phase or an ethanol solvent. The synthesis and stripping yield realized with the method can be stably kept at 98% or higher. The method is simple, convenient, safe and efficient, and has potential value for application research of layered acid type phosphorus niobium oxygen in the fields of electrochemical energy storage, photoelectric conversion devices, chemical catalysis, electrocatalysis and the like.

The invention provides a forming method of a touch display panel and a touch display mother board. The forming method of the touch display panel comprises the steps that the touch display mother boardwith a polydimethylsiloxane protection film is formed, and the surface of the polydimethylsiloxane protection film is subjected to plasma treatment; the touch display mother board is cut into a plurality of touch display units; the touch display units are soaked in an organic solvent, and the polydimethylsiloxane protection film is stripped off. Polydimethylsiloxane subjected to plasma treatmentis adopted as a protection film of a touch sensor in the manufacturing process; the touch display units are soaked in the organic solvent in the stripping-off process, and therefore the adhesivity between the protection film and the touch sensor is reduced, so that the protection film is easy to strip off and free of residues, operation is easy, and the stripping-off yield is remarkably increased.

The invention discloses an LED chip mass transfer method with high stripping yield and convenient film inversion. According to the method, an LED chip is embedded into an adhesive layer of a first transfer support plate in the process of transferring the LED chip from a growth substrate to the first transfer support plate through a laser stripping mode; the LED chip is protected through the adhesive layer, so that the problem that when the LED chip is stripped from the growth substrate, the LED chip is broken is solved, and the transfer yield of the LED chip is improved; and on the basis, after the LED chip is stripped from the growth substrate, subsequent film inversion is carried out, and before the LED chip is transferred from the first transfer carrier plate to a second transfer carrier plate, part of the adhesive at the peripheral side of the LED chip and part of the adhesive between the LED chip and the first transfer carrier plate are removed, and only the rest part of the adhesive is adhered between the LED chip and the first transfer carrier plate, so that the LED chip can be conveniently separated from the first transfer carrier plate in the process of transferring the LED chip from the first transfer carrier plate to the second transfer carrier plate.

The invention provides a method and apparatus of separating a substrate from a light emitting assembly. The method includes the steps: providing a to-be-separated light emitting assembly, wherein the light emitting assembly includes a first substrate, a gallium nitride epitaxial layer arranged at one side of the first substrate, and a metal substrate, and the gallium nitride epitaxial layer includes an N-type gallium nitride layer, an active layer and a P-type gallium nitride layer; and adjusting utilizing a laser generator to separate the first substrate through laser, wherein an aperture diaphragm is arranged on the path of laser emitted from the generator so that light spots of the laser are adjusted in size through the aperture diaphragm. In this way, light spots as small as possible can be utilized to carry out separation through laser, so less nitrides will be produced locally, and the substrate separation yield rate can be improved.

The present invention relates to a graphical epitaxial structure laser lift-off device. The device comprises a substrate, a shaping structure, a transmissivity regulation structure, a graphical epitaxial structure, gas transmission systems, an ultraviolet source, a lift-off chamber and a light-in window. Two sides of the lift-off chamber are respectively provided with the gas transmission systems,the light-in window is arranged on the lift-off chamber, the ultraviolet source is arranged above the outer side of the light-in window, the graphical epitaxial structure is arranged in the light-inwindow, the graphical epitaxial structure is provided with the substrate, the graphical epitaxial structure comprises an epitaxial structure, a sapphire substrate, graphical structures, inclined interfaces, planar interfaces, the plurality of graphical structures are uniformly arranged on the epitaxial structure, each graphical structure is one V-shaped slot structure formed by two inclined interfaces, and each planar interface is connected between each two adjacent graphical structures. The graphical epitaxial structure laser lift-off device is ingenious in design and convenient to operate, can achieve lift-off of the graphical substrate and can improve the lift-off yield.

The invention discloses a vacuum heating system, and a wafer stripping device and method. The vacuum heating system comprises a heating ring fixing plate, a heating ring, a thermal insulation plate, asuction nozzle fixing plate and a plurality of vacuum suction nozzles, wherein the heating ring fixing plate is in an annular shape and is provided with a circle of annular groove; the heating ring is in the annular shape and is arranged in the groove of the heating ring fixing plate; the thermal insulation plate is in the annular shape and is arranged above the heating ring; the suction nozzle fixing plate is arranged above the thermal insulation plate; and the plurality of vacuum suction nozzles are symmetrically and uniformly arranged on the suction nozzle fixing plate and are used for adsorbing a stripped wafer and removing the wafer. In the invention, through arranging the vacuum heating system, a bonding layer material can be heated in an area where the wafer is bonded and can be melted so that the wafer is completely stripped. Simultaneously, through the vacuum suction nozzles of the vacuum heating system, the stripped wafer can be adsorbed so that the wafer is convenient to carry, the wafer is prevented from be damaged and the yield rate of wafer stripping is increased.

The invention provides a preparation method of graphene oxide, and belongs to the field of material preparation. The method comprises the following steps: (1) carrying out plasma sputtering on graphite to obtain modified graphite; (2) adding potassium permanganate into concentrated sulfuric acid, and uniformly mixing to obtain a mixture A; (3) adding the modified graphite in the step (1) into the mixture A to obtain a mixture B; (4) reacting the mixture B at 25-60 DEG C for 2-6 hours to obtain a mixture C; (5) adding the mixture C into ice water, adding hydrogen peroxide, and uniformly mixing; and (6) adding water into the product obtained in the step (5), and washing until the product is neutral, thereby obtaining the precipitate, namely the graphene oxide. The stripping yield of the graphene oxide reaches up to 95% or above, and the dosage of concentrated sulfuric acid and potassium permanganate is effectively reduced. The method is high in stripping yield, low in cost, small in danger, rapid and simple in reaction process and very suitable for large-scale industrial production.

The invention discloses a fiber coating stripping device comprising a first handle and a second handle that are hinged to each other. A first clamping head is arranged at the end portion of the firsthandle; a second clamping head is arranged at the end portion of the second handle; the first clamping head is perpendicular to the first handle; and the second clamping head is perpendicular to the second handle. The first clamping head and the second clamping head have pointed ends and matched cutting edges; a first groove and a second groove are formed at the parts, approaching a hinging point,of the inner sides of the first clamping head and the second clamping head; a pressing part connected with the first handle is arranged at the back of the first clamping head; and a hand protection part extends from the pressing part to the first clamping head. The fiber coating stripping device is based on the jaw design conforming to the human engineering and has advantages of labor saving andvisual peeling process and effect.

The invention discloses a laser peeling device and method, wherein the laser peeling device includes: a working conveyor belt for driving the display screen to be peeled to move on it, and the display screen to be peeled includes a glass substrate and a flexible display screen; The mask shielding device of the area and the light-shielding area, wherein the light-transmitting area is used to transmit a part of the laser beam and make it irradiate on the display screen to be peeled driven by the operation conveyor belt, so as to perform laser peeling on the display screen to be peeled off, In this way, a flexible display screen and a glass substrate separated from each other are obtained; and the light-shielding area is used to block the remaining part of the laser beam, so as to prevent the laser from irradiating areas other than the display screen to be peeled off on the operation conveyor belt. The laser stripping device and method of the present invention are compatible with large screens and small screens.

A bottom film stripping knife relates to the field of film stripping mechanisms. The bottom film stripping knife comprises a mounting base, a movable sliding rail and a stripping knife assembly, the mounting base is movably arranged on a machine table, and the moving direction of the mounting base is perpendicular to the central axis of a bottom film roller shaft; the movable sliding rail is arranged on the mounting base and is parallel to the bottom film roller shaft; and the stripping knife assembly is detachably arranged on the movable sliding rail and used for abutting against a bottom film so that the bottom film can be separated. According to the bottom film stripping knife, force can be applied to the separation position of the bottom film through external force limitation, so that belt films on the two sides can be more stably separated, in the separation process, due to the fact that the bottom film is subjected to external force, the phenomena of bubbling and wrinkling are effectively avoided, the rejection rate can be effectively reduced, and the yield of bottom film stripping is improved.

The invention discloses a medical medicine stripping machine and a medicine stripping method, and belongs to the technical field of medical instruments. The medical medicine stripping machine comprises a medicine tamping device and a medicine feeding mechanism. The medicine tamping device comprises a base plate, hole sites are formed in the base plate in an array mode, a medicine tamping rod and a micro motor are installed in each hole site, and the output end face of each micro motor and one end of the corresponding medicine tamping rod are both inclined planes. The medicine feeding mechanism is installed on the inner wall of a cylindrical shell, the medicine feeding mechanism comprises an annular cylinder, a conductive sliding ring, a driver and a clamping device, and the conductive sliding ring is electrically connected to the clamping device. A circle of the clamping device is installed in the annular cylinder, and the output end of the driver is connected with the annular cylinder. A mounting hole is formed in the shell wall of the cylindrical shell, the medicine tamping device is fixed in the mounting hole, a notch corresponding to the driver is formed in the annular cylinder, and when the annular cylinder rotates, the notch is intermittently communicated with the mounting hole. According to the medical medicine stripping machine and the medicine stripping method, medicine stripping is conducted in the mode that medicine plates are clamped and then tamps medicine on the front face, manual adjustment is avoided, and the medicine stripping yield is increased.

The invention discloses a line recognition module and a preparation method thereof, and a display device, and aims to improve the stripping yield. The embodiment of the invention provides a line recognition module. The line recognition module comprises a flexible substrate which comprises a line recognition area and a binding area located outside the line recognition area; a plurality of line recognition units which are located on one side of the flexible substrate in the line recognition area; a plurality of signal lines which are located on the same side of the flexible substrate as the pattern recognition units and electrically connected with the pattern recognition units, each signal line extending to the binding area from the pattern recognition area; a driving chip which is bound with the signal line in the binding area; and an adhesive layer which is located on the side, away from the line recognition units, of the flexible substrate, the orthographic projection of the adhesive layer on the flexible substrate being not overlapped with the binding area.