Method of making chip type power inductor
A method of fabricating a chip type power inductor includes the steps of: preparing green sheets: forming cutting lines on a magnetic layer green sheet and a non-magnetic layer green sheet; forming via holes on the non-magnetic layer green sheet where the cutting lines are formed, and forming an electrode pattern at an upper surface of the non-magnetic layer green sheet; stacking a plurality of layers by constituting the magnetic layer and the non-magnetic layer where via holes and electrode patterns are formed as one unit in a state that a non-magnetic layer where cutting lines and electrode patterns are not formed is inserted; stacking a cover layer composed of a magnetic layer at upper and lower surfaces of the stacked layers; firing the stacked body; and forming external electrodes at an outer surface of the fired stack body.
1. A fabrication method of a chip type power inductor comprising:
preparing green sheets with a magnetic layer and a non-magnetic layer respectively formed on a carrier film;
forming cutting lines on the magnetic layer green sheet and the non-magnetic layer green sheet;
forming via holes on the non-magnetic layer green sheet where the cutting lines are formed, and forming an electrode pattern at an upper surface of the non-magnetic layer green sheet;
picking up unnecessary parts from the magnetic layer green sheet and the non-magnetic layer green sheet and thus corresponding remaining parts of the magnetic substance to the picked up parts of the non-magnetic substance or corresponding the picked up parts of the magnetic substance to remaining parts of the non-magnetic substance;
stacking a plurality of layers by constituting the magnetic layer and the non-magnetic layer where via holes and electrode patterns are formed as one unit in a state that a non-magnetic layer where cutting lines and electrode patterns are not formed is inserted;
stacking a cover layer composed of a magnetic layer at upper and lower surfaces of the stacked layers;
firing the stacked body; and
forming external electrodes at an outer surface of the fired stack body.
2. The method of claim 1 , wherein the magnetic layer or the non-magnetic layer on the carrier film are respectively formed by using a doctor blade tape casting method.
3. The method of claim 1 , wherein the electrode pattern of an upper surface of the non-magnetic layer green sheet is formed by a screen printing.