12results about How to "Good thickness consistency" patented technology

The embodiment of the invention discloses a rolling control method and equipment based on pole piece thickness prediction and a medium. The rolling control method based on pole piece thickness prediction comprises the steps that rolling operation parameters and a data pair set corresponding to the pole piece thickness are obtained; according to the data pair set, determining a pole piece thickness prediction model capable of representing correlation characteristics between the rolling operation parameters and the pole piece thickness; inputting the current rolling operation parameters into the pole piece thickness prediction model to predict the numerical value of the current pole piece thickness; according to the difference between the numerical value of the current pole piece thickness and the target pole piece thickness threshold value, the current operation parameters of rolling are adjusted. According to the technical scheme provided by the embodiment of the invention, the thickness of the pole piece is accurately predicted through the pole piece thickness prediction model, so that the thickness consistency of the pole piece actually produced by rolling is relatively good, and the problem that the first-order optimal rate of the thickness of the pole piece is influenced due to the fact that the thickness of the pole piece manufactured by the existing pole piece manufacturing method is inconsistent is solved.

The present invention provides a resin composition, a circuit material comprising the same, and a printed circuit board, the resin composition comprising (A) a first thermosetting resin comprising a polybutadiene resin and / or a polybutadiene copolymer resin having a number average molecular weight Mn < = 5000 g / mol; (B) a second thermosetting resin comprising polybutadiene resin and / or polybutadiene copolymer resin, the number average molecular weight Mn being greater than or equal to 15000 g / mol; (C) a first filler comprising rutile type titanium dioxide with D50 of 3-6 [mu] m and purity of more than or equal to 99.5%; (D) a second filler comprising amorphous fused silica, having a D50 of 8-12 [mu] m and a purity of not less than 99.5%; (E) a flame retardant; (F) a silane coupling agent; and (G) a radical initiator. The circuit material prepared from the resin composition has the advantages of high dielectric constant, low dielectric loss, high copper foil peel strength, stable dielectric constant and good thickness consistency.

This invention relates to a composite polishing structure design and polishing method for wafer-level polishing processes. The composite polishing structure design includes a disk body with a positioning groove at the center of its upper end. An upper Tesla groove, a lower Tesla groove, and an annular channel are arranged on the disk body around the positioning groove. The upper and lower Tesla grooves are arranged in a circumferentially spaced array and extend radially. The upper and lower Tesla grooves are arranged vertically and circumferentially adjacent. The inner ends of both the upper and lower Tesla grooves penetrate the positioning groove, and their outer ends penetrate the outer circumferential surface of the disk body. The annular channel is arranged in a radially spaced ring around the disk body and penetrates both the upper and lower Tesla grooves. This invention forms an integrated fluid guidance and waste chip discharge channel through the double-layer Tesla grooves, improving the utilization efficiency and chip removal capacity of the polishing fluid.

The invention provides a lamp panel, a lamp panel mother board, a backlight module and terminal equipment, the lamp panel comprises a substrate, a first solder mask layer, a second solder mask layer, a plurality of light-emitting elements and a protective layer, the substrate comprises at least one substrate layer, the substrate layers are stacked in the thickness direction of the substrate, circuit layers are arranged on the two sides of each substrate layer in the thickness direction of the substrate, and the protective layer is arranged between the first solder mask layer and the second solder mask layer. The substrate layer is insulated from the circuit layer, the circuit layer located on the first outer surface of the substrate layer is a first circuit layer, the circuit layer located on the second outer surface of the substrate layer is a second circuit layer, and the first circuit layer comprises a first inner area and a first avoiding area surrounding the first inner area. The first solder mask layer covers the first circuit layer, and the first solder mask layer comprises a plurality of hollow parts. The second solder mask layer covers the second circuit layer. The plurality of light-emitting elements are electrically connected with the first circuit layer through the hollow part. The protective layer covers the light-emitting element and the first solder mask layer, and the upper surface of the protective layer above the first avoiding area is a plane and is consistent with the upper surface of the protective layer above the first internal area in height.

The invention relates to the technical field of honeycomb ceramics, in particular to a thickness control material, a preparation method, application and silicon carbide honeycomb ceramics. The thickness control material comprises the following components: silicon carbide powder, hydroxypropyl methyl cellulose, redispersible latex powder, inorganic sol, water and a lubricant, the silicon carbide powder comprises coarse-grained powder and fine-grained powder, the granularity D50 of the coarse-grained powder is 20-30 [mu] m, and the granularity D50 of the fine-grained powder is 1-2 [mu] m. The thickness control material can be used for preparing silicon carbide honeycomb ceramics. The thickness-controlled pug has proper rigidity and good thickness consistency, the heat conductivity coefficient of the thickness-controlled pug is closer to that of a silicon carbide honeycomb ceramic unit block, and the heat shock resistance of silicon carbide honeycomb ceramic can be excellent; the silicon carbide honeycomb ceramic is good in splicing mud thickness control effect, stable in back pressure and good in thermal shock resistance.

The invention relates to the technical field of busbar insulation, in particular to an insulation powder dipping process for a busbar, which comprises the following steps of stamping, cleaning, drying, shielding treatment, sand blasting, preheating, powder dipping and curing treatment. The insulation powder dipping technology for the busbar can be suitable for a rapid flow automatic production line, the busbar manufactured through the technology is good in insulation thickness consistency, high in voltage resistance value and good in insulation performance, application of a high-voltage conductive dense space of a product is achieved, and the voltage resistance value can be controlled by adjusting the preheating temperature and the powder dipping time; the shielding treatment and the de-shielding treatment are more efficient and convenient by optimizing the process, and the product quality is improved.

The utility model discloses a multifunctional device for controlling the constant temperature of a film blowing machine for mulching film processing, and relates to the technical field of mulching film processing equipment. The device comprises a support, a bottom plate is fixedly connected to the inner bottom of the support, and an extrusion barrel is fixedly connected to an inner cavity of the support; a switching assembly is arranged at the top of the bottom plate and comprises a supporting frame fixedly connected to the top of the bottom plate and a first lead screw movably connected to one side of an inner cavity of the supporting frame. Through the synergistic effect of the switching assembly and the clamping assembly, a standby heating system can be rapidly switched when main constant-temperature equipment breaks down, shutdown replacement is not needed, the production interruption time is remarkably shortened, it is ensured that the heating device is tightly attached to the extrusion barrel through the magnetic attraction and clamping design of the closed ring, stable heat transfer is maintained, and it is ensured that the plastic melting temperature is uniform; therefore, the thickness consistency of mulching film finished products is improved, the rejection rate is reduced, and the overall production efficiency is improved.

The utility model relates to the technical field of semiconductor manufacturing equipment, specifically disclose a tray structure for silicon carbide epitaxial equipment, including tray base, the concentric circle arrangement of multiple wafer bearing positions is provided with in the upper end surface of circular tray base, each wafer bearing position is the recessed structure of ladder, including embedding setting bottom support ring in the upper end of circular tray base, the inclined transition surface is connected with the upper surface of tray base the outer edge of bottom support ring's upper end surface, through recessed bearing position structure of ladder, the risk of wafer thermal deformation breakage is reduced significantly, radial flow guide groove optimizes reaction gas radial distribution uniformity, and the composite structure of graphite matrix and silicon carbide coating and the processing of round corner edge are matched, effectively improve the anti -peeling ability of coating and equipment service life under high temperature working condition, finally realize the synchronous improvement of epitaxial layer thickness consistency and production yield.

The invention discloses a processing method of an aluminum oxide electrostatic chuck, and aims to overcome the defect that the connection failure is easy to occur when the electrostatic chuck is used for a long time. The method comprises the following steps: S1, selecting two substrates, and processing a high-voltage electrode groove on one substrate; s2, coating bonding slurry on the surface of a substrate close to the edge, and drying; s3, the two substrates are attached together and assembled into a furnace, diffusion welding is achieved after the slurry is heated, the two substrates are connected into a disc body, and an electrode cavity is formed in the high-voltage electrode groove; s4, conducting resin is poured into the electrode cavity in a vacuum mode. According to the processing of the electrostatic chuck, high-strength integration of the aluminum oxide ceramic and the internal conductive adhesive functional layer is realized, the problem of connection failure of the electrostatic chuck caused by decomposition or aging of an adhesive at a high temperature is avoided, the overall performance of the electrostatic chuck is improved, and the service life of the electrostatic chuck is prolonged.

The present invention provides a resin composition, a circuit material comprising the same, and a printed circuit board, the resin composition comprising (A) a first thermosetting resin comprising a polybutadiene resin and / or a polybutadiene copolymer resin having a number average molecular weight Mn < = 5000 g / mol; (B) a second thermosetting resin comprising polybutadiene resin and / or polybutadiene copolymer resin, the number average molecular weight Mn being greater than or equal to 15000 g / mol; (C) a first filler comprising calcium titanate, the particle size D50 of which is 6-10 [mu] m and the purity of which is greater than or equal to 99.5%; optionally (D) a second filler comprising amorphous fused silica, the particle size D50 of which is 8-12 [mu] m and the purity of which is greater than or equal to 99.5%; (E) a flame retardant; (F) a silane coupling agent; (G) a radical initiator; the circuit material prepared from the resin composition has the advantages of high dielectric constant, low dielectric loss, high copper foil peel strength, stable dielectric constant and good thickness consistency.

The invention provides a surface modification method of a magnesium-lithium alloy, which can solve the problems that the protection performance of the modified magnesium-lithium alloy is poor, or the thickness of a film layer is not uniform in a micro-arc oxidation process, and the humidity and heat resistance of the modified magnesium-lithium alloy is poor in an existing modification method. The method comprises the following steps: pretreating a magnesium-lithium alloy body; preparing a micro-arc oxidation electrolyte; carrying out micro-arc oxidation treatment to obtain the magnesium-lithium alloy with a micro-arc oxidation layer on the surface; cleaning and drying the magnesium-lithium alloy subjected to micro-arc oxidation treatment, pre-baking, spraying the surface of the magnesium-lithium alloy with a silane confining liquid, baking, turning over, spraying the unsprayed surface of the magnesium-lithium alloy with the silane confining liquid, curing, and cooling to room temperature to obtain the magnesium-lithium alloy with a hole sealing layer on the surface; spraying a special primer for magnesium alloy and baking to obtain the magnesium-lithium alloy with a primer layer on the surface; and spraying acrylic polyurethane finishing paint and baking to obtain the magnesium-lithium alloy with a finishing paint layer on the surface, carrying out a damp-heat test, judging whether the magnesium-lithium alloy is qualified or not, and finishing the surface modification of the magnesium-lithium alloy.

The invention belongs to the technical field of grinding of grinding tools, and discloses a brittle corrosion-resistant metallic bond, a metallic bond superhard grinding wheel and a preparation method of the metallic bond superhard grinding wheel. The brittle corrosion-resistant metal bonding agent prepared by the invention comprises the following raw materials in parts by weight: 50-70 parts of copper powder, 5-20 parts of tin powder, 5-15 parts of graphite powder and 15-20 parts of an improvement additive. Graphite powder and an improvement additive are added into a traditional bronze-based metal binding agent, secondary heat treatment is carried out, the plasticity of the binding agent is reduced, the brittleness and hardness of the binding agent are improved, brittle fracture can occur in time, and the workpiece quality cannot be affected; through secondary heat treatment, elements in the improvement additive form a uniform and compact protective film on the grinding wheel, internal metal can be continuously prevented from being corroded in the whole life cycle of the grinding wheel, and the thickness consistency problem caused by corrosion of the side face in the using process of the grinding wheel is solved. The brittleness and corrosion resistance of the bronze-based metal bonding agent are improved on the premise that the cost is not obviously increased.