268results about How to "High thickness accuracy" patented technology

An object of the present invention is to provide a treating method for brittle member capable of stably holding the brittle member when applying predetermined treatments such as transportation and grinding back surface of a brittle member such as a semi-conductor wafer and separating the brittle member without breakage after finishing required treatment to thereby attaining high thickness accuracy of the brittle member.

A treating method for brittle member comprising: a step of removably fixing a brittle member on a flexible glass base plate, a step of treating said brittle member, a step of fixing said brittle member side by holding means, and a step of separating said flexible glass base plate from said brittle member by bending said flexible glass base plate.

The invention relates to a method for manufacturing a foamed aluminum sandwich plate, which belongs to the field of porous foam metal and laminar composite materials. The method comprises the following steps of: uniformly mixing aluminum-silicon alloy powder prepared by an atomization method, and foaming agent titanium hydride powder and metal magnesium powder in a certain ratio; filling the powder into a thin-wall steel (or aluminum alloy) tube with one sealed end; sealing the other end of the tube after powder filling and preparing a rolled blank; rolling and compounding at a slow speed on a cold rolling mill; trimming an obtained composite plate and cutting a foamed preformed blank according to the size of a foaming mold; foaming the preformed blank in a steel mold in a limited way; adjusting foaming temperature and foaming time as required; and foaming at a high temperature for a short period of time to obtain a high-quality foamed aluminum sandwich plate with a uniform foam structure in a core layer, good interface bonding, high thickness accuracy and excellent plate profile. The method has the outstanding characteristics of low equipment requirement, high plate profile accuracy of a product, high three-point bending strength and the like and is advantaged technology suitable for mass industrial production of foamed aluminum sandwich structural materials.

The present invention provides an electrode plate having a collector 1, an active material layer 2 and a non-coated portion 3 and satisfies at least one of the following conditions. (1) The maximum thickness in an area inside by 20 mm from an edge portion of the active material layer is not more than the sum of an average thickness of the active material layer and 10 mum. (2) In an inclined portion of the peripheral edge portion of the active material layer, an area in which the thickness of the active material layer is not less than 1 mum and less than an average thickness of the active material layer has a width of not more than 1 mm. (3) An absolute value of a positional shifting of an actually formed pattern with respect to a true boundary line of a predetermined pattern is not more than 1 mm. (4) The active material layers are formed in a plane symmetry to front and back surfaces of the collector, and an absolute value in the positional shifting between the patterns formed on front and back side surfaces of the collector is not more than 1 mm.

A method for manufacturing a polishing pad, which may be laminated, with a small number of manufacturing steps, high productivity and no peeling between a polishing layer and a cushion layer includes preparing a cell-dispersed urethane composition by a mechanical foaming method; continuously discharging the cell-dispersed urethane composition onto a face material, while feeding the face material; laminating another face material on the cell-dispersed urethane composition; curing the cell-dispersed urethane composition, while controlling its thickness to be uniform, so that a polishing layer including a polyurethane foam is formed; cutting the polishing layer parallel to the face into two pieces so that two long polishing layers each including the polishing layer and the face material are simultaneously formed; and cutting the long polishing layers to produce the polishing pad.

Composite particles for an electrochemical device electrode containing an electrode active material, a conductive material, and a binder, wherein primary particles of the composite particles have a volume average particle size of 1 to 500 μm and, when a relative particle amount of the primary particles having a particle size of a fine range near a mode radius R1 of the primary particles in the particle size distribution of the primary particles of the composite particles found by the volume standard is ρ1 and a relative particle amount of secondary particles having a particle size of the fine range in the particle size distribution of the secondary particles of the composite particles found by the volume standard in measurement at 23° C. is ρ2, ρ2/ρ1 is 0.03 to 0.60.

The present invention provides a foam sheet for a car interior member which is capable of being molded into a desired shape while keeping an excellent sound absorbency. The foam sheet for a car interior member according to the invention comprises a modified polyphenylene ether-based resin foam sheet having an open cell ratio of 50% or more, and the modified polyphenylene ether-based resin foam sheet has pore portions formed in a single face thereof so as to be open to the face thereof. Accordingly, vibration energy of sounds is smoothly induced through the pore portions to the open cells of the foam sheet 1 to vibrate cell walls of the open cells, thereby converting the vibration energy to thermal energy. Thus, an excellent sound absorbency is exhibited.

The present disclosure relates generally to the field of sequential surface chemistry. More specifically, it relates to products and methods for manufacturing products using Atomic Layer Deposition (“ALD”) to depose one or more materials onto a surface. ALD is an emerging variant of Chemical Vapor Deposition (“CVD”) technology with capability for high-quality film deposition at low pressures and temperatures, which may produce defect-free films, on a macroscopic scale, at any given thickness. The present disclosure includes, in varying embodiments, methods of manufacturing microelectronic assemblies and components such as battery electrodes, capacitors, resistors, catalyzers and PCB assemblies by ALD, and the products manufactured by those methods.

The invention provides a control method of coating thickness of a quartz crystal, wherein the coating thickness is calculated according to the initial oscillation frequency of the quartz crystal before coating and the oscillation frequency of the quartz crystal after coating. The control method is characterized in that thickness measurement errors caused by rise of the oscillation frequency of the quartz crystal due to temperature increment of the quartz crystal are reduced. The coating device of the quartz crystal, provided by the invention, is convenient to operate, and the work efficiency is improved. A film thickness controller of the quartz crystal provided by the invention adopts a human-machine interface and is convenient for operators to monitor the coating process in real time and analyze the film forming data, thereby improving the controllability of the coating process. By adopting the control method and the device provided by the invention, the error on the coating thickness can be reduced to below 1/4 of the error in the prior art, so that the precision on the coating thickness is greatly improved.

The invention discloses a preparation method of wide and thin hot-rolled steel plates with the width-to-thickness ratio being greater than or equal to 500, which belongs to the technical field of multi-layer metal stacking rolling. According to the preparation method, a multi-layer blank combined rolling method is adopted for producing the wide and thin hot-rolled steel plates and is characterized in that two to four layers of blanks are combined and welded into a whole so that the temperature reduction is relatively slow in the rolling process and accordingly the fluctuation in performance of the heads and the tails of the steel plates are relatively small; meanwhile, multiple layers of blanks are combined for rolling, so that the total thickness of the combined steel plates is increased, and accordingly, the phenomena, such as wave, edge camber, steel stacking and misroll, occurring in the rolling process are obviously reduced, and the buckling phenomenon and the like tend not to occur in the cooling process. According to the invention, multiple layers of steel plates are combined for rolling, so that control over the temperature uniformity is better, and the thickness precision is higher after the steel plates are separated.

The invention discloses a method for controlling a roll gap during finish rolling of strip steel. According to the method for controlling the roll gap during finish rolling of the strip steel, a set calculation model of the roll gap is , wherein the Gap in the formula is the set calculation value of the roll gap; a set calculation value of the outlet thickness of the strip steel is Fh; a width compensation and gain value is Gwid; an oil film compensation and gain value is Goil; an on-load roll gap value is S; a roll gap value when a roller is calibrated is S0; roll force is F; roll force when the roller is calibrated is F0; a roller gap self-learning coefficient is Lcs; a width compensation coefficient is WCX; initial rolling mill rigidity is M; rolling mill rigidity during calibration is M'; a roll gap value corresponding to a pressure value which is calculated when a rolling mill constant is calculated with the pressing method and is called initial roll gap value is Sj.

The invention relates to a high precision strip rolling thickness control method based on feedback signals from a thickness gauge, belonging to the technical field of automatic control of strip rolling. The method comprises the following steps: step 1, inputting rolling system data and strip data; step 2, determining the proportionality factor K of the thickness-control object; step 3, setting a tracking length of the strip sampling; step 4, carrying out multipoint acquisition on the thickness difference delta h measured value of the length Ls(i) of each strip sampling by a computer; step 5, determining delta s(i). The invention has the advantages of proposing length tracking of strip sampling, solving the problem that delay time changes with rolling speed in traditional methods, applying Smith predictive control method to monitoring AGC system, giving the control rate when the controller is under the integrated form; therefore, compared with the traditional control method, the invention not only has rapid response speed, but also has higher static control precision, so the invention can be widely promoted to strip rolling factories to improve the thickness and precision of strip products.

A process for producing an optical element which comprises a polymeric liquid crystal layer having a helically twisted molecular structure and has satisfactory thickness precision and satisfactory optical properties. The process comprises applying a mixed solution containing a polymerizable nematic liquid crystal compound and a polymerizable chiral reagent to an oriented substrate, followed by drying, to orient the liquid crystal compound; and irradiating the mixed solution applied with radiation from the oriented substrate side while maintaining the mixed solution in contact with a gas comprising oxygen to thereby polymerize and cure the mixed solution.

The invention discloses thin hot forming steel rolled directly through a sheet billet and with the tensile strength being larger than or equal to 1500MPa. The thin hot forming steel comprises, by weight, 0.21%-0.25% of C, 0.26%-0.30% of Si, 1.0%-1.3% of Mn, 0-0.01% of P, 0-0.005% of S, 0.015%-0.060% of Als, 0.25%-0.30% of Cr, 0.026%-0.030% of Ti or 0.026%-0.030% of Nb or 0.026%-0.030% of V or a mixture of any two of the above components, 0.003%-0.004% of B and 0-0.005% of N. The production method includes the production steps of molten iron desulphurization, smelting and refining through an electric furnace or converter, continuous casting, dephosphorization treatment before entering a soaking pit, soaking, heating, high pressure water dephosphorization before entering a rolling mill, rolling, cooling, coiling, austenitizing, mold stamping forming and quenching. The thin hot forming steel is short in process, good in surface quality and high in thickness precision; the quality requirement of cold-rolled products can be met, and complex deformation can be achieved smoothly; and moreover, no resilience exists after deformation, and dimensional accuracy of parts is high.