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    • 8. 发明授权
    • Immersion plating of silver
    • 银的浸镀
    • US07479305B2
    • 2009-01-20
    • US10521085
    • 2002-09-06
    • Hans-Jürgen SchreierHartmut Mahlkow
    • Hans-Jürgen SchreierHartmut Mahlkow
    • B05D1/18B05D1/36
    • H05K3/244C23C18/42
    • The problem in forming solderable and bondable layers on printed circuit boards is that the surfaces tarnish after storage of the boards prior to further processing (mounting of the electrical components), thus affecting solderability and bondability. In order to overcome this problem it is suggested to deposit, in a first method step, a first metal which is more noble than copper to the printed circuit board and to plate silver in a second method step with the proviso that the first metal be deposited at a rate that is at most half the rate of silver in the second method step when the first metal is silver.
    • 在印刷电路板上形成可焊接和可粘合层的问题是在进一步处理(安装电气部件)之前,表面在储存电路板之后变色,从而影响可焊性和粘合性。 为了克服这个问题,建议在第一种方法步骤中,在第二种方法步骤中,将沉积在铜上的第一种金属沉积到印刷电路板上,并在第二种方法步骤中沉积银,其条件是第一种金属沉积 当第一金属是银时,在第二方法步骤中银的速率最多的一半的速率。
    • 10. 发明授权
    • Method and solution for producing gold coating
    • 生产金涂层的方法和解决方案
    • US06336962B1
    • 2002-01-08
    • US09529139
    • 2000-07-07
    • Petra BackusHartmut MahlkowChristian Wunderlich
    • Petra BackusHartmut MahlkowChristian Wunderlich
    • C23C1831
    • C23C18/42H05K3/244
    • The present invention describes a method of producing gold coating on a workpiece having a palladium surface, having the steps of: a) making an aqueous solution containing at least one compound selected from the group of compounds containing gold(I) and gold(III) ions and additionally at least one organic compound selected from the group consisting of formic acid, aromatic carboxylic acids having the chemical formula: where R1, . . . , R4=H, alkyl, alkenyl, alkynyl, OH, and the salts, esters or amides of these compounds; b) adjusting the pH of the solution to 1 to 6 using pH adjusting agents; and c) bringing the workpiece into contact with the solution such that gold coating is plated onto the palladium surface.
    • 本发明描述了一种在具有钯表面的工件上生产金涂层的方法,具有以下步骤:a)制备含有至少一种选自含金(I)和金(III)的化合物的化合物的水溶液, 离子和另外的至少一种选自甲酸,具有以下化学式的芳族羧酸的有机化合物:其中R1, 。 。 R 4 = H,烷基,烯基,炔基,OH以及这些化合物的盐,酯或酰胺; b)使用pH调节剂将溶液的pH调节至1至6; 和)使工件与溶液接触,使得金涂层镀在钯表面上。