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    • 48. 发明专利
    • SEPARATOR FOR BATTERY
    • JPH09293492A
    • 1997-11-11
    • JP12766196
    • 1996-04-25
    • NIPPON TELEGRAPH & TELEPHONE
    • ICHINO TOSHIHIROTAKESHITA YUKITOSHIYAMAMOTO FUMIO
    • H01M2/16H01M2/18
    • PROBLEM TO BE SOLVED: To achieve a high porosity and a high mechanical strength and excellent heat resistance by reducing a pressure of a polytetrafluoroethylene(PTFE) film having a specific pore diameter, a specific porosity and a specific thickness, introducing a predetermined mixture gas, aging the film in a plasma, and coating the film with a carbon oxide compound layer. SOLUTION: A drawn porous PTFE film having a maximum pore diameter of 0.01-1μm, a porosity of 75-95% and a thickness of 10-50μm is contained inside a vacuum container, and is reduced in pressure of 0.02mTorr. Subsequently, mixture gas of oxygen with argon is introduced and a pressure is increased up to 20mTorr. Furthermore, the PTFE film is aged for 45 minutes by a plasma treatment, and then, is coated with a carbon oxide compound layer. Herein, since the pore diameter is 0.2-0.5μm, it is possible to prevent a short phenomenon due to a growth of a needle-like dendrite crystal in a pore, which may occur during lithium deposition. Moreover, since the porosity is 90% or less, tensile breakage strength can be maintained. Consequently, it is possible to provide a separator film having a high porosity and a high mechanical strength and being excellent in heat resistance and stability.
    • 50. 发明专利
    • MULTILAYER FILM X-RAY REFLECTOR
    • JPH08278398A
    • 1996-10-22
    • JP10826795
    • 1995-04-06
    • NIPPON TELEGRAPH & TELEPHONE
    • TAKENAKA HISATAKAYAMAMOTO FUMIO
    • G01N23/00G21K1/06
    • PURPOSE: To prevent the deviation of a reflection peak wavelength and a peak angle of X rays and obtain an X-ray reflector with high precision by installing a heating means for a multilayer film. CONSTITUTION: A multilayer film 3 is formed using W in a heavy element layer and C in a light element layer, on an SiC substrate (4) 10cm square and about 10mm thick. The thicknesses of the heavy and light element layers are respectively set at about 0.7nm and 1.1nm, and the number of pairs at around 150. A lamp heater 5 installed on the substrate 4 is place on the side of the multilayer film 3 and the substrate 4 is heated by emitted light 6, and the temperature of the multilayer film 3 is measured with a thermocouple 7 and is set at around 400 deg.C. The control of the temperature makes it possible to adjust the periodic length of the multilayer film 3 to a desired one. The application of it to various kinds of analyses using X rays and soft X rays lessens the fluctuation of reflectance and improved precision and accuracy.