US 12,109,779 B2
Copper-clad laminate, wiring board, and copper foil with resin
Yuki Inoue, Fukushima (JP); Tatsuya Arisawa, Fukushima (JP); and Yuki Kitai, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/768,170
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Oct. 15, 2020, PCT No. PCT/JP2020/038933
§ 371(c)(1), (2) Date Apr. 11, 2022,
PCT Pub. No. WO2021/079819, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-194375 (JP), filed on Oct. 25, 2019.
Prior Publication US 2023/0054257 A1, Feb. 23, 2023
Int. Cl. B32B 15/20 (2006.01); B32B 15/082 (2006.01)
CPC B32B 15/20 (2013.01) [B32B 15/082 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A copper-clad laminate comprising:
an insulating layer; and
a copper foil existing to be in contact with at least one surface of the insulating layer,
wherein the insulating layer contains a cured product of a resin composition containing a polymer having a structural unit represented by the following Formula (1) in a molecule, the copper foil having a layer treated with a silane coupling agent having an amino group in the molecule as a silane coupling agent layer,
a chromium element amount, on an exposed surface on which the insulating layer is exposed by an etching treatment of the copper-clad laminate with a copper chloride solution, measured by X-ray photoelectron spectroscopy is 7.5 at % or less with respect to a total element amount measured by X-ray photoelectron spectroscopy, and
a surface roughness of the exposed surface is 1.1 μm or less in terms of ten-point average roughness, and wherein a thickness of the silane coupling agent layer is sufficient to cause a nitrogen element amount, on the exposed surface, measured by X-ray photoelectron spectroscopy to be 1.0 at % to 5.0 at % with respect to a total element amount measured by X-ray photoelectron spectroscopy:

OG Complex Work Unit Chemistry
wherein in Formula (1), Z represents an arylene group, R1 to R3 each independently represent a hydrogen atom or an alkyl group, and R4 to R6 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.