81results about How to "Little change in thickness" patented technology

A group III nitride composite substrate includes a support substrate and a group III nitride film. A ratio st / mt of a standard deviation st of the thickness of the group III nitride film, to a mean value mt of the thickness thereof is 0.001 or more and 0.2 or less, and a ratio so / mo of a standard deviation so of an absolute value of an off angle between a main surface of the group III nitride film and a plane of a predetermined plane orientation, to a mean value mo of the absolute value of the off angle thereof is 0.005 or more and 0.6 or less. Accordingly, there is provided a low-cost and large-diameter group III nitride composite substrate including a group III nitride film having a large thickness, a small thickness variation, and a high crystal quality.

A humidity sensor includes: a sensor chip including a capacitive humidity sensor element and a connection electrode, wherein the capacitive humidity sensor element includes a humidity sensitive film having relative permittivity changeable in accordance with humidity, and wherein the connection electrode is electrically connected to the humidity sensor element; a lead plate electrically connected to the connection electrode; and a mold for covering a connection portion between the connection electrode and the lead plate. The mold is disposed on the sensor chip and includes a groove. The humidity sensitive film is disposed in the groove. The humidity sensitive film has a height in the groove, the height equal to or lower than a surface of the mold. The height of the humidity sensitive film in the groove is homogeneous.

The invention discloses an internal combustion type rail belt grinder, comprises a rack, a sanding belt, a driving wheel, a contact wheel, a tension pulley, a front travel contour wheel, a rear travel contour wheel and an explosive motor, wherein the front travel contour wheel and the rear travel contour wheel are arranged on the rack; the explosive motor is arranged on the rack and drives the driving wheel to rotate; the sanding belt is orderly wound on the excircles of the driving wheel, the contact wheel and the tension wheel; and a regulation mechanism for regulating the height of the rack is arranged between the rack and the front travel contour wheel or between the rack and the rear travel contour wheel. In the invention, the sanding belt is adopted to grind; the excircle of the contact wheel pressing the sanding belt on a welding line is provided with annular rubbers; the sanding belt is contacted with the welding line in a flexible mode, and the contact area is large, and the grinding efficiency is high; the variation in sanding belt thickness is small during grinding, thus the regulating operation of the grinding height is less, and the work efficiency is high; the regulation mechanism of the invention is simple, and the regulation is convenient and reliable; the driving wheel, the contact wheel and the tension wheel are all arranged on the support plate and the mounting and the debugging are convenient; and the explosive motor is suitable for field electroless operation.

A process for producing high quality reverse osmosis, nanofiltration, and ultrafiltration membranes in a high speed process provides membranes which have excellent rejection characteristics coupled with high flux capabilities. The process employs tandem coating techniques to coat a microporous substrate with a thin membrane on the order of 25 ANGSTROM to 1.0 microns. The tandem coating process comprises tandem offset gravure and subsequent slot die coating applicators, or alternatively comprises tandem slot die coating applicators. For reverse osmosis and nanofiltration membranes, a wet-on-wet coating process is used to coat a porous substrate first with an aqueous solution, and then with an organic solution to produce a cross-linked, interfacially polymerized composite membrane. Single slot coating applicators are utilized to produce ultrafiltration membranes.

A humidity sensor includes: a sensor chip including a capacitive humidity sensor element and a connection electrode, wherein the capacitive humidity sensor element includes a humidity sensitive film having relative permittivity changeable in accordance with humidity, and wherein the connection electrode is electrically connected to the humidity sensor element; a lead plate electrically connected to the connection electrode; and a mold for covering a connection portion between the connection electrode and the lead plate. The mold is disposed on the sensor chip and includes a groove. The humidity sensitive film is disposed in the groove. The humidity sensitive film has a height in the groove, the height equal to or lower than a surface of the mold. The height of the humidity sensitive film in the groove is homogeneous.

A group III nitride composite substrate includes a support substrate and a group III nitride film. A ratio st / mt of a standard deviation st of the thickness of the group III nitride film, to a mean value mt of the thickness thereof is 0.001 or more and 0.2 or less, and a ratio so / mo of a standard deviation so of an absolute value of an off angle between a main surface of the group III nitride film and a plane of a predetermined plane orientation, to a mean value mo of the absolute value of the off angle thereof is 0.005 or more and 0.6 or less. Accordingly, there is provided a low-cost and large-diameter group III nitride composite substrate including a group III nitride film having a large thickness, a small thickness variation, and a high crystal quality.

A wide polyolefin film may be made by high-speed film forming, which has uniform properties over its whole width and is free of thickness irregularities, and provides a packaging film applicable to large-scale production which has good gloss and bag-making property, as well as a package made from the film. A polyolefin laminate film includes an oriented base layer that is mainly made up of a polypropylene resin and a sealing layer mainly made up of a polyolefin resin which is formed on at least one surface of the base layer, which film has an effective product takeout width of not less than 5500 mm and satisfies the following relational formula of the thickness variation rate Y (%) of the film and the product takeout width X (mm) of the film: Y≦0.001X+4.

A method for manufacturing membrane electrode assembly of fuel cell includes positioning an ion exchange membrane that is cleaned and trimmed to a predetermined size in advance to a base plate, mounting the base plate to a printing platform, attaching a printing plate to the platform, coating a catalyst solution on the printing plate with a scraper, printing the catalyst solution onto the ion exchange membrane with the scraper, heating the ion exchange with a heating board to a temperature of 70–80° C., and waiting for the ion exchange membrane to return flat to complete the coating of the catalyst solution on the ion exchange membrane. The printing and heating steps are repeated for both anode and cathode of the ion exchange membrane. The ion exchange membrane is further subject to hot pressing and then a piece of carbon cloth is positioned on the catalyst coating to serve as a diffusion layer. This completes the manufacturing of the membrane electrode assembly.

A laminate according to one embodiment of the present invention includes: a substrate; and a birefringent layer formed on the substrate and satisfying the relationship of nz>nx=ny, wherein the birefringent layer Contains acrylate polymers.

The present application provides a polyimide film comprising a polyimide polymer. The polyimide polymer comprises a reaction product of a diamine monomer and a dianhydride monomer, and the diamine monomer comprises N, N-bis (4-aminophenyl)-N, N-diphenyl-1, 4-phenylenediamine. The polyimide film provided by the invention can be used for preparing a thick graphite film. The invention also provides a graphite film prepared from the polyimide film and a preparation method of the polyimide film.

A substrate for inkjet printing, which includes a photoresist layer structure on a base substrate, and a method of manufacturing the same are provided. The substrate, which has high surface tension variation and slight thickness variation, may be manufactured at a low cost. The substrate includes a discontinuous organic layer structure made of a fluorinated hydrocarbon or a polysiloxane on the photoresist layer structure.

A manufacturing apparatus is provided for manufacturing a tubular resin film of high quality and little thickness variations, which is stretched and given an orientation, and suitable as retardation film or the like. It comprises a stretching section (6) for stretching the tubular resin film (20), and a maintaining section (7) for maintaining a shape of said tubular resin film (20) stretched. Further, said stretching section (6) is arranged to apply a stretching force to said tubular resin film for longitudinally and / or circumferentially stretching said tubular resin film (20).

The invention discloses a vapor chamber semi-shearing forming method. The vapor chamber semi-shearing forming method includes the following steps of providing a first cover plate and a second cover plate, forming a plurality of supporting columns in the middle of the first cover plate in a semi-shearing stamping mode, performing semi-shearing on the edge to form a welding flange edge, reserving anair outlet, buckling the second cover plate on the first cover plate and performing sealing along the welding flange edge after a heat adsorption core body is adsorbed into the first cover plate or the second cover plate to form a cavity, vacuumizing the cavity after injecting working fluid into the cavity through the air outlet to form negative pressure, and finally sealing the air outlet to prepare a vapor chamber. The vapor chamber cover plates are manufactured in the semi-shearing stamping mode, production cost is reduced, and the environmental protection is facilitated; by arranging positioning blocks, the positioning precision is ensured, and the percent of pass of the product is improved; and through a welding mode, the production cycle of the whole technological process is greatlyshortened, and efficient production is realized.