Patent ID: 11895770
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC H  B  G | IPC B  G  H

Claim 0:
1. A copper-clad laminate comprising an insulating layer and a
copper foil in contact with at least one surface of the insulating layer, 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,
wherein the insulating layer contains a cured product of a resin composition containing a modified polyphenylene ether compound of which a terminal is modified with a substituent having a carbon-carbon unsaturated double bond,
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 2.0 μm or less in terms of ten-point average roughness, and
wherein the thickness of the silane coupling agent layer is sufficient to cause a a nitrogen element that can be confirmed by X-ray photoelectron spectroscopy to exist on the exposed surface upon etching treatment of the copper-clad laminate and exposure of the insulating layer.