US 12,404,598 B2
Coated wire
Murali Sarangapani, Singapore (SG); Yee Weon Lim, Singapore (SG); Wai Khee See Tho, Singapore (SG); Mariyappan Dhayalan, Singapore (SG); Chee Chow Tan, Singapore (SG); Juergen Scharf, Hanau (DE); and Sungsig Kang, Singapore (SG)
Assigned to HERAEUS ELECTRONICS GMBH & CO. KG, Hanau (DE); and HERAEUS MATERIALS SINGAPORE PTE. LTD., Singapore (SG)
Appl. No. 18/263,655
Filed by Heraeus Materials Singapore Pte. Ltd., Singapore (SG); and Heraeus Deutschland Gmbh & Co. KG, Hanau (DE)
PCT Filed Feb. 5, 2021, PCT No. PCT/SG2021/050060
§ 371(c)(1), (2) Date Jul. 31, 2023,
PCT Pub. No. WO2022/169407, PCT Pub. Date Aug. 11, 2022.
Prior Publication US 2024/0084472 A1, Mar. 14, 2024
Int. Cl. C25D 5/12 (2006.01); C25D 3/12 (2006.01); C25D 3/48 (2006.01); C25D 3/50 (2006.01); C25D 5/16 (2006.01); C25D 5/50 (2006.01); C25D 7/06 (2006.01)
CPC C25D 5/12 (2013.01) [C25D 3/12 (2013.01); C25D 3/48 (2013.01); C25D 3/50 (2013.01); C25D 5/16 (2013.01); C25D 5/50 (2013.01); C25D 7/0607 (2013.01)] 17 Claims
 
1. A wire comprising a wire core with a surface, the wire core having a coating layer superimposed on the wire core surface, wherein
the wire core is a silver-based wire core, the silver-based wire core consisting of a silver-based material in the form of a doped silver, a silver alloy, or a doped silver alloy,
the coating layer is a double-layer consisting of a 1 to 30 nm thick inner layer of nickel and an adjacent 20 to 200 nm thick outer layer of gold,
the wire exhibits a total carbon content of ≤40 wt.-ppm, and
the carbon content of the wire surface is in a range from 0.5 to less than 2.5 mg of carbon per square meter.