Patent ID: 9595384
Date: 2017-03-14
CPC Classifications: H01F,Y10T

Claim:
1. A coil substrate comprising: a substrate including a first surface and a second surface on an opposite side of the first surface; a coil-shaped wiring including a first wiring and a second wiring layered on the first wiring, the coil-shaped wiring provided on the first surface of the substrate, the coil-shaped wiring including adjacent parts provided adjacent to each other with respect to a width direction of the substrate; another coil-shaped wiring provided on the second surface of the substrate, the another coil-shaped wiring including another adjacent parts provided adjacent to each other with respect to the width direction of the substrate; an insulating layer formed between the adjacent parts of the coil-shaped wiring; another insulating layer formed between the another adjacent parts of the another coil-shaped wiring; and a through-electrode that penetrates the substrate and the first wiring; wherein the coil-shaped wiring and the another coil-shaped wiring are connected by way of the through-electrode, wherein the through-electrode includes an end surface exposed on one end of the through-electrode, wherein the second wiring covers the exposed end surface of the through-electrode and an upper surface of the first wiring, wherein a space is provided between a side surface of the first wiring and the insulating layer, wherein the second wiring fills the space and covers the first wiring, and wherein both side surfaces of the second wiring contact the insulating layer.