US 12,251,862 B2
Metal-resin composite, surface treatment method, and substrate of circuit board for high-frequency and high-speed signal transmission
Wei Chen, Nanjing (CN); Qi Xue, Nanjing (CN); Huijie Zhuang, Nanjing (CN); Linling Li, Nanjing (CN); Jianglong Han, Nanjing (CN); Dongshan Zhou, Nanjing (CN); and Xiaoliang Wang, Nanjing (CN)
Assigned to NANJING UNIVERSITY, Nanjing (CN); and JIANGSU HHCK ADVANCED MATERIALS CO., LTD., Lianyungang (CN)
Filed by NANJING UNIVERSITY, Nanjing (CN); and JIANGSU HHCK ADVANCED MATERIALS CO., LTD., Lianyungang (CN)
Filed on Apr. 11, 2024, as Appl. No. 18/632,326.
Claims priority of application No. 202310389043.2 (CN), filed on Apr. 12, 2023.
Prior Publication US 2024/0342968 A1, Oct. 17, 2024
Int. Cl. B32B 15/20 (2006.01); B29C 35/16 (2006.01); B29C 45/14 (2006.01); C25D 11/02 (2006.01); H05K 1/02 (2006.01); H05K 1/03 (2006.01); B29C 45/73 (2006.01); B29K 33/00 (2006.01); B29K 81/00 (2006.01); B29L 31/34 (2006.01)
CPC B29C 45/14311 (2013.01) [B29C 35/16 (2013.01); C25D 11/02 (2013.01); H05K 1/0237 (2013.01); H05K 1/0353 (2013.01); B29C 2035/165 (2013.01); B29C 2045/14868 (2013.01); B29C 45/73 (2013.01); B29K 2033/12 (2013.01); B29K 2081/04 (2013.01); B29L 2031/3425 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A surface-treated metal for metal-resin bonding, wherein a nano-scale pore array for filling of a resin is provided to extend from a surface to an interior of a metal, and nano-scale pillars are provided to extend from bottoms to openings of some or all of nano-scale pores of the nano-scale pore array;
the nano-scale pores each have a depth of 20 nm to 10 μm and a pore size of 20 nm to 1 μm;
the nano-scale pillars each have a length of 10 nm to 9.9 μm and a diameter of 20 nm to 950 nm;
the surface of the metal has a porosity of 0.1 to 0.9;
the nano-scale pillars have a same chemical composition as walls of the nano-scale pores; a material for the walls of the nano-scale pores is a metal oxide;
an included angle between a central axis of each of the nano-scale pores and the surface of the metal is 60° to 90°; an included angle between each of the nano-scale pillars and a central axis of a corresponding nano-scale pore is 0° to 30°;
the nano-scale pores provided with the nano-scale pillars account for 10% to 100% of all the nano-scale pores on the surface of the metal; and
the metal is selected from a group consisting of aluminum, magnesium, copper, titanium, iron, zinc, and an alloy thereof; and the resin is selected from a group consisting of a thermoplastic resin and a thermosetting resin.