Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1990-06-04
1993-04-13
Beck, Shrive
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427304, 427305, 427306, 4274431, 427437, C23C 2600
Patent
active
052021513
ABSTRACT:
The present invention relates to an electroless gold plating solution, a method of plating by using the same, and an electronic device plated with gold by using the same.
According to the present electroless gold plating solution, the plating solution components contain no cyanide ions, the amount of a reducing agent used is small, and gold plating can be carried out without causing the gold plating on conducting paths having a fine interval between them to short-circuit the conducting paths.
Therefore, according to the method of gold plating by using said electroless gold plating solution, a plating method that is safe in the plating work and in the treatment of its waste liquor can be accomplished. The method has a feature that the method can provide an electronic device on which parts can be mounted highly densely, and wherein the joint reliability to the parts is high.
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Ando Setsuo
Kanda Naoya
Matsuura Naoko
Miyazawa Osamu
Okudaira Hiroaki
Beck Shrive
Dang Vi Duong
Hitachi , Ltd.
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