US 11,697,155 B2
Metal paste and use thereof for joining components
Christian Schwarzer, Hanau (DE); and Wolfgang Schmitt, Rodgau (DE)
Assigned to HERAEUS DEUTSCHLAND GMBH & CO. KG, Hanau (DE)
Appl. No. 17/47,356
Filed by Heraeus Deutschland GmbH & Co. KG, Hanau (DE)
PCT Filed Jul. 19, 2019, PCT No. PCT/EP2019/069483
§ 371(c)(1), (2) Date Oct. 13, 2020,
PCT Pub. No. WO2020/057806, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 18195619 (EP), filed on Sep. 20, 2018.
Prior Publication US 2021/0114102 A1, Apr. 22, 2021
Int. Cl. B22F 7/06 (2006.01)
CPC B22F 7/064 (2013.01) 20 Claims
 
1. A metal paste, comprising (A) 65 to 85 wt % of metal particles and (B) 10 to 35 wt % of organic solvent, wherein the metal particles (A) consist of 70 to 100 wt % of organically coated copper flakes having
a specific surface area in the range of 1.9 to 3.7 m2/g,
a total oxygen content in the range of 2 to 4 wt %, and
a weight ratio of total carbon to total oxygen in the range of 0.25 to 0.9.