Abstract:
PROBLEM TO BE SOLVED: To provide a new electrode for a secondary battery which has a high charge and discharge capacity and a long cycle lifetime, and which is highly useful as a negative electrode of a lithium-ion secondary battery. SOLUTION: This is the electrode for the lithium secondary battery containing a substrate composed of a sheet-shaped non-conductive material having a fine structure, and an active material layer composed of tin or tin alloy formed on a surface part of the substrate and a surface of the inside of the fine structure. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To comparatively inexpensively and stably provide compound alloy metal balls of a high melting point excellent as connectors of electrical/electronic circuit components. SOLUTION: The metal ball surfaces are provided with electroplating silver-copper alloy film layers and the silver content of the silver-copper alloy films is specified 5 to 97wt% and the film thickness to ≥0.5 μm. In addition, the metal balls are composed of single metal or alloy having the melting point higher than the melting point of the silver-copper alloy film layers. The metal balls which are minute, are excellent in sphericity and have uniform dimensional accuracy are produced by an equal liquid droplet spray process, plasma rotating electrode process or flushing process and thereafter the silver-copper alloy film layers of a uniform film thickness are formed by an electroplating process on the resultant metal ball surfaces. The compound alloy metal ball of the high melting point having excellent joining characteristics can thus be provided by taking advantage of the sphericity and dimensional accuracy of the workpiece metal balls. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve film appearance and solder wettability in an electrodeposition film obtained from a neutral tinning bath. SOLUTION: The neutral tinning bath of pH 2 to 9 contains (A) a soluble stannous salt, and (B) a complexing agent such as gluconic acid, citric acid and glucoheptonic acid, and (C) a specified quaternary ammonium salt such as an alkylpyridinium salt, N,N-dialkylmorpholinium salt, arylated alkylammonium salt or aralkylammonium salt, trialkylsulfoalkylene ammonium betaine, pyridium sulfobetaine and an alkylisoquinolinium salt. By the incorporation of the specified quanternary ammonium salt, the appearance and solder wettability of the tin film obtained from the bath are more excellent, compared with the case of a neutral bath containing a betaine type amphoteric surfactant or a trimethylalkylammonium salt. COPYRIGHT: (C)2003,JPO