Patent ID: 9713251
Date: 2017-07-18
CPC Classifications: H01P,H05K,Y10T

Claim:
1. A high-frequency signal line comprising: a laminate including a plurality of insulator layers; a signal line provided on a first principal surface of one of the insulator layers; a first ground conductor provided on a second principal surface of the insulator layer provided with the signal line, the first ground conductor including openings that overlap with the signal conductor; and a second ground conductor provided in or on the laminate so as to be opposed to the first ground conductor with the signal conductor positioned therebetween; wherein no openings are provided in an entire portion of the second ground conductor to which the signal line is opposed; and a surface roughness of the signal line is less on a side that is opposed to the second ground conductor than on a side that is opposed to the first ground conductor.