Multilayer substrate

A multilayer substrate comprising:

• a laminate substrate in which a plurality of insulating layers are laminated;
• an alternating current signal line in the laminate substrate;
• and
• a ground electrode on or in the laminate substrate and overlapping the alternating current signal line in a thickness direction of the laminate substrate;
• wherein
• the alternating current signal line includes a plurality of signal lines spaced apart from each other in the thickness direction of the laminate substrate, and the plurality of signal lines are electrically connected by a plurality of connection conductors penetrating one of the plurality of insulating layers in the thickness direction of the laminate substrate;
• the plurality of signal lines include:
• a first signal line adjacent to the ground electrode in the thickness direction of the laminate substrate;
• and
• a second signal line adjacent to the first signal line in the thickness direction of the laminate substrate;
• wherein
• a thickness of the first signal line is larger than a thickness of the second signal line in the thickness direction of the laminate substrate.