74results about How to "Little change over time" patented technology

In the direct contact type metal diaphragm valve, the durability of the valve, that is, the number of continuous opening and closing operations of the valve that can be guaranteed, is greatly increased while maintaining an appropriate flow coefficient Cv, and the deformation of the valve seat over time is suppressed, so that the above-mentioned Cv The temporal fluctuation of the value becomes smaller. In the direct contact type metal diaphragm valve, the metal diaphragm is made of a laminated body of a plurality of metal steel thin plates and nickel-cobalt alloy thin plates and is formed into a circular inverted disk shape with the central part raised upwards, and the metal thin film The distance of 55-70% of the maximum bulge height Δh is limited to the maximum valve stroke ΔS of the valve.

Provided are a dielectric porcelain composition, a laminated ceramic capacitor and the manafacturing method thereof. The dielectric porcelain composition comprises barium titanate as the principal component, a first subcomponent (at least one member of the oxides of Mg, Ca, Ba, and Sr), a second subcomponent (an oxide containing 1 mol of Si atoms in 1 mol), a third subcomponent (at least one member of the oxides of V, Mo, and W), a fourth subcomponent containing at least one kind of R1oxide (wherein R1is at least one member selected from among Sc, Er, Tm, Yb, and Lu), a fifth subcomponent containing at least one kind of R2oxide (wherein R2is at least one member selected from among Y, Dy, Ho, Tb, Gd, and Eu), a sixth subcomponent (at least one member selected from the oxides of Mn and Cr), and a seventh subcomponent (at least one member selected from calcium zirconate and a mixture of a Ca oxide and a Zr oxide). The ratio of the number of moles A of the second subcomponent of the composition 1, and the total number of moles B of the fourth subcomponent and the fifth subcomponent is no less than 0.7; the ratio of the number of moles C of the Si atoms in the second subcomponent of the composition 2, and the total number of moles D of the atoms except Si and oxygen in all the subcomponents.

An asymmetrical porous polytetrafluoroethylene (PTFE) membrane for filter is composed of high-compactness surface layer and continuous air bubble type porous layer. Its advantages are small ageing change, low water permeability, good sealing and electric characteristics, improved gas permeability and collecting efficiency, and less pressure loss.

The invention relates to an organic electroluminescent element, a method for producing organic electroluminescent element, a display, and a lighting device. Provided are the organic electroluminescent (EL) element having high luminescent efficiency, a small aging change in luminescent intensity even after the organic EL element is stored at a high temperature together with a long luminescent lifetime at a high temperature, and the method for producing the organic EL element. Further, a display and a lighting device including the organic EL element are also provided. The organic EL element contains an organic layer provided between at least a pair of a cathode and an anode. The organic layer is formed of at least one layer including a luminescent layer, and at least one layer forming the organic layer contains at least one of the compounds represented by the general formulae (A1) to (A5).

The invention relates to an avalanche photodiode and a method for manufacturing the same. The avalanche photodiode can improve high-speed response and reduce the features changing along time. The avalanche photodiode includes a N-type Inp substrate; an allnAs avalanche multiplying layer (3), a p-type electric field controlling layer (4), a non-doping light-absorbing layer (5), and a window layer (6) sequentially laminated on the substrate. A p-type region is present in parts of the window layer (6) and the non-doping light-absorbing layer (5). Carbon is the dopant of the electric field controlling layer (4). Zn is the dopant of the p-type region. A bottom face of the p-type region is closer to the substrate than is an interface between the non-doping light-absorbing layer (5) and the window layer (6).

Disclosed is a polishing composition containing a substance that lowers the pH of an aqueous solution in the presence of an oxidizing agent, and a pH-buffering agent. The difference in absolute value between the pH of the polishing composition immediately after adding a 31 % by weight hydrogen peroxide solution thereto at 5.16 g per 100 g of the polishing composition and the pH of the polishing composition after leaving to stand for eight days from the addition of hydrogen peroxide is 0.5 or less. Also disclosed is another polishing composition containing a substance that lowers the pH of an aqueous solution in the presence of an oxidizing agent, and a pH-controlling agent. In comparison to the amount of a basic substance in the polishing composition immediately after adding a 31% by weight hydrogen peroxide solution thereto at 5.16 g per 100 ml of the polishing composition, the amount of a basic substance in the polishing composition after leaving to stand for eight days from the addition of hydrogen peroxide is increased by no less than 0.1 mM.

The invention relates to an electron-emitting device and an electron source, an electron beam apparatus as well as an image display apparatus using the same. The electron beam apparatus includes: an insulating member having a recess on its surface; a cathode having a protruding portion extending over the outer surface of the insulating member and the inner surface of the recess; a gate positioned at the outer surface of the insulating member in opposition to the protruding portion; and an anode positioned in opposition to the protruding portion through the gate.