Electroplated tin
Gold-tin alloy shows a eutectic point at an Au/Sn composition of 80/20 (wt%), with a melting point of 280°C. This alloy is non-oxidizing, has good solderability, low resistivity, and improved creep characteristics, lubrication, and wear resistance, making it suitable as a high-temperature joining material for high-frequency devices such as mobile phones, optoelectronic packages, mounted components, optical communication components, as well as for protective element materials, sliding parts, and decorative items. Many gold-tin alloy materials are produced in the form of ribbons or pellets metallurgically, but issues have arisen that make them difficult to apply to narrow pitches associated with high-density mounting. This plating bath allows for barrel plating of micro parts, enabling the production of a uniform eutectic composition plating film.
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basic information
【Features】 - The melting start temperature of the alloy plating film shows a stable value of 280±1℃ across a wide composition range (Au: 66-87 wt%). - The composition of the gold-tin alloy plating film can achieve a wide range by controlling the metal concentration ratio in the bath, in addition to the eutectic composition of Au/Sn=80/20 (wt%). - In terms of the appearance of the plating film, as the gold content in the film increases beyond the eutectic composition, it exhibits a gold color and glossiness. - An insoluble anode of platinum-plated titanium is used for the anode, which also minimizes the oxidation degradation of Sn and demonstrates excellent long-term stability. - Cyanide gold is used in the gold salt, but it is a low-cyanide plating bath that does not contain other free cyanide compounds. ● For other functions and details, please contact us.
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Applications/Examples of results
【Applications】 〇 High-temperature bonding materials, semiconductor packages, wafer bump electrodes, optoelectronic components, aircraft parts, sliding parts, decorative items, etc. ● For other functions and details, please contact us.
Company information
"Things that no one has done yet" and "There are surely people who will be happy if it exists"… The Yamato Kasei Group develops its unique chemical business in niche markets that major manufacturers do not tackle, under the spirit of 'San-so.' The value of the Yamato Kasei Group lies in launching new products into the world through original technology development that does not imitate others. With this sentiment in mind, we adopted "We are Chemical Innovators" as our corporate slogan. To put this slogan into practice, we will continuously challenge ourselves with new, interesting, and unprecedented endeavors.
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