Common mode filter with multi-spiral layer structure and method of manufacturing the same

摘要

A common mode filter with a multi-spiral layer structure includes a first coil, a first insulating layer, a second coil, a second insulating layer, a third coil, a third insulating layer, and a fourth coil, wherein the first coil serially connects with the fourth coil, and the second coil serially connects with the third coil. A first conductive pillar is configured to connect the first coil and the fourth coil, and a second conductive pillar is configured to connect the second coil and the third coil, wherein the first conductive pillar and the second conductive pillar are internally diagonally disposed relatively within a corner or the same side of corners of the rectangular spiral.

主权项

1. A common mode filter with a multi-spiral layer structure, comprising:
a first coil; a second coil disposed on the first coil; a third coil disposed on the second coil, wherein the third coil is directly connected in series with the second coil; and a fourth coil disposed on the third coil, wherein the fourth coil id directly connected in series with the first coil and not directly connected with the second coil or the third coil.