Chip electronic component and method of manufacturing the same
A chip electronic component may include an insulating layer formed on a lower portion of a side surface of an internal coil pattern to avoid a direct contact between the internal coil pattern and a magnetic material, thereby preventing a waveform distortion indicating a reduction in inductance at high frequency.
1. A chip electronic component, comprising:
a magnetic body including an insulating substrate;
an internal conductor pattern part disposed on at least one surface of the insulating substrate;
an insulating layer coating the internal conductor pattern part; and
external electrodes disposed on at least one end surface of the magnetic body and connected to the internal conductor pattern part,
wherein the insulating layer includes a first insulating layer coating an upper portion of the internal conductor pattern part and a second insulating layer coating a side surface of the internal conductor pattern part.
2. The chip electronic component of claim 1 , wherein when a thickness of the internal conductor pattern part is t, the second insulating layer formed on the side surface of the internal conductor pattern part has a height of 0.15t to 0.85t from a lower portion of the side surface of the internal conductor pattern part.
3. The chip electronic component of claim 1 , wherein the second insulating layer is further formed on the first insulating layer formed on the upper portion of the internal conductor pattern part.
4. The chip electronic component of claim 3 , wherein the second insulating layer formed on the first insulating layer has a thickness of 0.1 μm to 10.5 μm.
5. The chip electronic component of claim 1 , wherein conductor pattern portions forming the internal conductor pattern part have the first insulating layer interposed therebetween.
6. The chip electronic component of claim 1 , wherein the first insulating layer includes a photoresist (PR).
7. The chip electronic component of claim 1 , wherein the second insulating layer contains at least one selected from a group consisting of a novolac based epoxy resin and a rubber based polymer epoxy resin.
8. The chip electronic component of claim 1 , wherein the internal conductor pattern part is coated with both of the first and second insulating layers, to avoid a direct contact with a magnetic material forming the magnetic body.
9. A method of manufacturing a chip electronic component, the method comprising:
forming an internal conductor pattern part on at least one surface of an insulating substrate;
forming an insulating layer to coat the internal conductor pattern part therewith;
stacking magnetic layers on upper and lower portions of the internal conductor pattern part formed on the insulating substrate to form a magnetic body; and
forming external electrodes on at least one end surface of the magnetic body to be connected to the internal conductor pattern part,
wherein the forming of the insulating layer includes forming a first insulating layer coating the upper portion of the internal conductor pattern part and forming a second insulating layer coating a side surface of the internal conductor pattern part.
10. The method of claim 9 , wherein the forming of the second insulating layer is performed by vacuum processing after dipping the internal conductor pattern part into a resin used for forming the second insulating layer.
11. The method of claim 10 , wherein the resin includes at least one selected from a group consisting of a novolac based epoxy resin and a rubber based polymer epoxy resin.
12. The method of claim 10 , wherein the vacuum processing is performed to satisfy 85 torr to 0 torr.
13. The method of claim 10 , wherein the vacuum processing is performed for two to ten minutes.
14. The method of claim 9 , wherein when a thickness of the internal conductor pattern part is t, the second insulating layer formed on the side surface of the internal conductor pattern part is formed to have a height of 0.15t to 0.85t from a lower portion of the side surface of the internal conductor pattern part.
15. The method of claim 9 , wherein the second insulating layer is further formed on the first insulating layer formed on the upper portion of the internal conductor pattern part.
16. The method of claim 9 , wherein conductor pattern portions forming the internal conductor pattern part have the first insulating layer interposed therebetween.