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    • 4. 发明申请
    • SURFACE TREATING AGENT FOR COPPER OR COPPER ALLOY AND USE THEREOF
    • 用于铜或铜合金的表面处理剂及其用途
    • WO2010024421A1
    • 2010-03-04
    • PCT/JP2009/065133
    • 2009-08-24
    • SHIKOKU CHEMICALS CORPORATIONHIRAO, HirohikoYAMAJI, NoriakiMURAI, Takayuki
    • HIRAO, HirohikoYAMAJI, NoriakiMURAI, Takayuki
    • C23C22/52C23F11/14B23K1/20B23K35/36H05K3/28C07D233/64
    • C23F11/149B23K1/20C07D233/64C23C22/52H05K3/282H05K2203/124
    • An object is to provide a surface treating agent, which in mounting electronic parts or the like to a printed wiring board using a lead-free solder, forms a chemical layer having excellent heat resistance on the surface of copper or a copper alloy constituting a circuit part of a printed wiring board or the like and at the same time, improves the wettability to the solder and makes the solderability good, and a surface treatment method. Also, another object is to provide a printed wiring board resulting from bringing the surface of copper or a copper alloy constituting a copper circuit part into contact with the foregoing surface treating agent and to provide a soldering method by bringing the surface of copper or a copper alloy into contact with the foregoing surface treating agent and then performing soldering using a lead-free solder. A surface treating agent for copper or a copper alloy, which contains an imidazole compound represented by the formula (I): (I) wherein Ar 1 and Ar 2 are different and represent the following formula (II) or formula (III); R represents a hydrogen atom or an alkyl group: (II) (III) wherein X 1 and X 2 are the same or different and represent a hydrogen atom or a chlorine atom.
    • 本发明的目的是提供一种表面处理剂,其在使用无铅焊料将电子部件等安装到印刷线路板上时,在铜或铜合金构成电路的表面上形成耐热性优异的化学层 印刷电路板等的一部分,并且同时提高了对焊料的润湿性,并且使可焊性良好,以及表面处理方法。 此外,另一个目的是提供一种由构成铜电路部分的铜或铜合金的表面与上述表面处理剂接触而形成的印刷线路板,并且通过使铜或铜的表面 合金与上述表面处理剂接触,然后使用无铅焊料进行焊接。 一种铜或铜合金的表面处理剂,其含有式(I)表示的咪唑化合物:(I)其中Ar1和Ar2不同,表示下式(II)或式(III); R表示氢原子或烷基:(II)(III),其中X 1和X 2相同或不同,表示氢原子或氯原子。