TH65537B - Environmentally friendly surface treated steel plate For electronic components Excellent in respect of solder wettability, whisker's build-up resistance, and over-time stability and method of manufacturing of the same. - Google Patents

Abstract

DC60 This invention provides a surface treated steel sheet for the electronics That achieves solderability, anti-whisker properties, and accelerated appearance stability. At the same time While there are no harmful substances That have an impact on the environment such as lead and chromium and their methods of production The same thing is a surface treated steel plate for electronic components. This consists of a Ni-plated steel or sheet, which is plated with Sn and Zn, and then treated by heat treatment or an alloyed Sn-Zn to form a layer of Sn-Zn alloy, In this case, layers of Sn-Zn alloy are deposited in the amount of 3 g / m or more, the Sn-Zn alloy layer has a ratio of Zn (wt) / Sn (wt) is 0.001 to 0.1, appropriately 0.001 to 0.01, and this layer of Sn-Zn alloy contains an inorganic coating composed mainly of phosphol. Rick Acid-Zinc-Magnesium The cumulative amount of P + Zn + Mg is 0.1 to 100 mg / m2, appropriately 0.1 to 10 mg / m2. This invention provides a surface treated steel plate for the medical components. electronics That achieves scalability, anti-whisker properties, and accelerated aging stability. At the same time While there are no harmful substances That have an impact on the environment such as lead and chromium and their methods of production The same thing is a surface treated steel plate for electronic components. It consists of a Ni-plated steel or sheet, which is plated with Sn and Zn, and then treated by thermal diffusion or is plated with a Sn-Zn alloy to form a layer of Sn- alloys. Zn, where such a layer of Sn-Zn alloy is deposited in an amount of 3 g / m2 or more, the Sn-Zn alloy layer has a ratio of Zn (wt) / Sn (wt) is 0.001 to 0.1, appropriately 0.001 to 0.01, and this layer of Sn-Zn alloy contains an organic coating composed mainly of phosphoric acid. - Zinc-Magnesium The cumulative amount of P + Zn + Mg is 0.1 to 100 mg / m2, appropriately 0.1 to 10 mg / m2.

Claims (5)

Disclaimer (all) which will not appear on the advertisement page: 4 July 2017 1. Environmentally friendly surface treated steel plates for components. Excellent electronics in solder wettability, whisker-proof properties, accelerated-aging appearance stability. It consists of a Ni-plated steel or plate, which is plated with Sn and Zn, and is then treated by heat-diffusion or alloyed with Sn-Zn to form a Sn-Zn alloy layer, a steel plate treated. With such a face for components Electronic, which is especially characteristic is that the Sn-Zn alloy layer is deposited in quantities of 3 g / m2 or more, the Sn-Zn alloy layer has a Zn (weight) / Sn (weight) ratio of 0.001 to 0.1 and the Sn alloy layer. -Zn contains an inorganic substance composed mainly of phosphoric-zinc-magnesium acid in the correct amount. Cumulative P + Zn + Mg is 0.1 to 100 mg / m2 ---------------------------------- -------------------------------------------------- -------------------------------------------- 1.Eco-friendly surface treated steel plates for components. Electronically Excellent in solderability, wettability, anti-whisker properties, accelerated aging stability. It consists of a Ni-plated steel or sheet, which is plated with Sn and Zn, and then treated by thermal diffusion or is plated with a Sn-Zn alloy to form a layer of Sn- alloys. Zn, where the steel plate is surface treated for the path component Such electronic It is characterized by the fact that the layers of such Sn-Zn alloy are deposited in an amount of 3 g / m 2 or more, that the Sn-Zn alloy layer has a ratio of Zn (wt) / Sn (wt) is 0.001 to 0.1, and this layer of Sn-Zn alloy contains an inorganic coating composed mainly of phosphoric acid-zinc. -magnesium The cumulative amount of P + Zn + Mg is 0.1 to 100 mg / m2. 2.Eco-friendly surface treated steel plates for components. Electronic Excellent in solderability, wettability, anti-whisker properties, accelerated aging stability. As pointed out in claim 1, it is characterized that the said Sn-Zn alloy layer has the ratio of Zn (weight) / Sn (weight) is 0.001 to 0.01. 3.Eco-friendly surface treated steel plates for components. Electronic Excellent in solderability, wettability, anti-whisker properties, accelerated aging stability. As explained in Claim No. 2, it is characterized by that inorganic coatings Mostly made up of phosphoric Acid-Zinc-Magnesium On the layer of such Sn-Zn alloy, the cumulative amount of P + Zn + Mg is 0.1 to 10 mg / m2. 4.Eco-friendly method of production of surface treated steel plate For electronic components Excellent in wettability, solderability, whisker's anti-aging properties, accelerated-aging stability as described in one of Claim No. 1. To 3, are characterized by plating Ni-plated steel plates or plates with Sn and Zn, and then treating them by heat diffusion or plating with Sn-Zn alloys to create Layer of Sn-Zn alloy, then without the The zinc oxide on the surface is removed, immersed the plates in a magnesium diphosphate solution at a temperature of 30 ํ to 70 ํ C, and then leaching it immediately. And drying it at 170 ํ or less. 5. Environmentally friendly method of production of surface treated steel plate. For electronic components Excellent in the solderability, solderability, whisker-proof properties, accelerated-aging stability as described in claim No. 4, characterized by Specific by designation The temperature of the treatment by immersion in magnesium diphosphate solution was 50 ํ to 70 ํ and the drying temperature was determined. After the subsequent rinsing at 100 ํ or less.