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    • 67. 发明专利
    • METHOD AND APPARATUS FOR FORMING THIN POLYIMIDE FILM
    • JPH02178630A
    • 1990-07-11
    • JP33234788
    • 1988-12-29
    • SHARP KK
    • AKAGI YOSHIROISHINO MARIKOINOUE ATSUHISAUENISHI SHIGERUTANIGUCHI HIROSHI
    • C08G73/10G02F1/1337
    • PURPOSE:To uniformize the thickness of a thin polyimide film and to improve the adhesive property thereof by supplying the vapor of polyimide raw materials consisting of plural monomers to a plasma atmosphere to ionize the vapor, transferring the ions by an electric field onto a substrate surface to stick the ions thereon and heating the substrate in this sticking process, thereby forming the thin polyimide film on the substrate. CONSTITUTION:The quartz glass substrate 5b is mounted to a substrate holder 5 and respectively adequate amts. of pyromellitic dianhydride PMDA and oxydianiline ODA are charged into two monomer housing containers 3. The inside of a vacuum chamber 1 is evacuated to a vacuum and the surface of the substrate is cleaned for several minutes by plasma. A voltage is then applied to a substrate holder 5 in such a manner that the holder serves as a negative electrode by a DC power source 17 for the electric field transfer of the ionized polyimide raw material; further, the substrate 5b is heated and held. The respective monomers are heated to evaporate and the heating rate is so controlled that the respective monomers are deposited by evaporation at each equal molar quantity to accelerate the ions of the PMDA and the ODA and the polymn. precursors thereof and to deposit the ions by evaporation on the heated substrate 5b. The thin polyimide film which is uniform even in the projecting parts of the thin film forming surface without lowering the thickness and has the excellent adhesive property is obtd. in this way.
    • 70. 发明专利
    • METHOD FOR QUANTITATIVE ANALYSIS OF CARBON
    • JPS6258145A
    • 1987-03-13
    • JP19794185
    • 1985-09-06
    • SHARP KK
    • TANIGUCHI HIROSHIAKAGI YOSHIROMORITA TATSUONAKAJIMA YOSHIHARU
    • G01N23/22
    • PURPOSE:To calculate the content of carbon with high accuracy, by measuring secondary redioactive rays of a standard specimen other than carbon and an unknown specimen and calculating the ratio of the secondary radiation intensities of the standard specimen and the unknown specimen with respect to an element other than carbon. CONSTITUTION:For example, in the quantitative analysis of the content of carbon in amorphous silicon carbide, silicon is used as a standard specimen and an amorphous silicon carbide obtained by plasma decomposition of silane, methane and hydrogen is used as an unknown specimen and measurement is performed by an electronic microprobe method. The K-value being the ratio of the secondary radiation intensities of the unknown specimen and the standard specimen is calculated with respect to silicon and the imaginary K-value of carbon is further determined. ZAF correcting calculation is performed and the content of carbon is calculated from the value bringing the sum of concns. of all componential elements to 100%. Because the content of carbon is calculated by calculating the intensities of secondary radiations with respect to componential elements other than carbon, the content of carbon can be quantified with high reliability without depending on the kind of a carbon structure and the selection of the standard specimen.