Showing papers on "Sodium hypophosphite published in 1974"
Patent•
17 May 1974
TL;DR: In this article, a method for producing a metal resistor by treating a base material with a stannous chloride solution, silver salt solution, and palladium chloride solution is presented.
Abstract: Method for producing a metal film resistor by (1) treating a base material with a stannous chloride solution, silver salt solution and palladium chloride solution, respectively, (2) subjecting the thus treated base material to electroless plating in a bath having a pH of 95-105 containing specified amounts of cobalt salts, nickel salts, sodium hypophosphite and specific acetifying agents, at a temperature of 20°-50°C, (3) heat treating the resultant metal film under specified conditions, which are also effective to prevent oxidation of the film and (4) subjecting the heattreated metal film to a surface treatment under specified conditions, which are also effective to cause oxidation of the film
10 citations
Patent•
26 Feb 1974TL;DR: An electroless copper plating bath comprising a copper salt, a chelating agent, an alkali pH adjusting agent, formaldehyde, and sodium hypophosphite as a plating rate accelerator is described in this article.
Abstract: An electroless copper plating bath comprising a copper salt, a chelating agent, an alkali pH adjusting agent, formaldehyde, and sodium hypophosphite as a plating rate accelerator.
4 citations