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    • 4. 发明专利
    • DIELECTRIC RESONATOR
    • JPH09289407A
    • 1997-11-04
    • JP12238096
    • 1996-04-20
    • TAIYO YUDEN KK
    • AIKAWA YUTAKAITO MITSUYOSHIUEHARA TAKAYUKI
    • H01P7/04H01P11/00
    • PROBLEM TO BE SOLVED: To provide the dielectric resonator which can obtain an excellent Q value and contributes to the size reduction and weight reduction of an equipment. SOLUTION: A dielectric element body is cleaned and its outer peripheral surface is masked with resist. The dielectric element body after being masked is dipped in silver dip liquid, and lifted and dried in a heat-treatment furnace. Consequently, an internal electrode and a short-circuit electrode are formed. Then the resist is removed with a solvent, etc., the inner peripheral surface side of the dielectric element body is closed with a plug, and an external electrode is formed by the said dipping method. The plug is removed and one end surface is ground to remove the electrodes. Consequently, the internal and external electrodes have specific different film thicknesses. The relation between the internal and external film thicknesses and Q values is as shown in the graph, and an excellent Q value is obtained on condition that ra
    • 5. 发明专利
    • ELECTRONIC DEVICE AND PRODUCTION THEREOF
    • JPH08186050A
    • 1996-07-16
    • JP33762594
    • 1994-12-28
    • TAIYO YUDEN KK
    • KANAI HIDEYUKIITO MITSUYOSHIHONDA TOSHIMITSU
    • H01G4/12H01G4/30H05K3/34
    • PURPOSE: To ensure a practical soldering strength while enhancing the wettability of molten solder regardless of surface oxide by employing an outer electrode comprising a plurality of conductive layers including a surface plating layer containing tin and at least one layer containing hydrogen being desorbed thermally. CONSTITUTION: A ceramic element 3 comprising inner electrodes 1 and ceramic dielectrics 2 laminated alternately is provided, at the opposite ends thereof, with outer electrodes 7, 7 each comprising a baked conductive film 4, a nickel plating layer 5 and a solder plating layer 6 thus producing a multilayer ceramic chip capacitor. When plating is carried out under a state of undue current density, the plating can be carried out while generating hydrogen and a predetermined quantity of hydrogen can be contained efficiently in the plating film. The hydrogen is desorbed at the melting point of solder, and when the plating film is employed in the outer electrodes 7, 7, hydrogen is desorbed through melting of solder at the time of soldering an electronic device to a printed board.