Patent ID: 8426249
Filing Date: 2013-04-23
Classification: H01F,H05K

Abstract:
1. A chip part manufacturing method, comprising a process of separating a plurality of chip parts connected to each other by a connection on one main surface of a substrate into individual pieces, wherein the connection is formed from metal layer, and the metal layer is melted and removed by using an etching agent to separate the plurality of chip parts connected to each other by the connection comprising the steps of: forming an insulating resin layer having a plurality of frame-like void portions adjacent each other and a spiral void portion disposed in a region of the frame-like void portion; forming a metal layer in the frame-like void portion and the spiral void portion and on the insulating resin layer; polishing the metal layer at least up to the upper surface of the insulating resin layer; and forming a coil section formed from spiral metal layer in the spiral void portion.