Common mode filter and electronic device including the same

A common mode filter comprising:

• four external electrodes;
• and
• two ground electrodes,
• wherein a first surface of the common mode filter includes a first side, a second side opposing the first side, a third side, and a fourth side opposing the third side,
• at least one surface of each of the external electrodes and at least one surface of each of the ground electrodes are exposed to the first surface of the common mode filter,
• at least one side of two of the external electrodes and at least one side of one of the ground electrodes contact the first side of the first surface, and
• at least one side of the two external electrodes that do not contact the first side of the first surface and at least one side of the ground electrode that does not contact the first side of the first surface contact the second side of the first surface.

A common mode filter having a hexahedral shape including a first surface of which at least one horizontal side is longer than at least one vertical side, comprising:

• four external electrodes;
• and
• two ground electrodes,
• wherein the four external electrodes are positioned at four corners of the first surface, respectively, such that two sides of each of the external electrodes are shared with at least two sides of the first surface, and
• each of the two ground electrodes share a side with one horizontal side of the first surface and are disposed between the external electrodes so as to be spaced apart from the external electrodes.

A common mode filter comprising:

• a base part made of a magnetic material;
• a coil part provided on the base part and including coils formed by disposing conductive patterns in a spiral shape and external terminals connected to end portions of the coils;
• a discharge part provided on the coil part and including dummy external terminals contacting the external terminals, discharge patterns electrically connected to the dummy external terminals, ground patterns spaced apart from the discharge patterns by a predetermined interval, and ground terminals electrically connected to the ground patterns;
• and
• a cover part including external electrodes provided on the discharge part and contacting the dummy external terminals, ground electrodes provided on the discharge part and contacting the ground terminals, and a magnetic material part filled between the dummy external terminals and the ground terminals to cover the discharge part,
• wherein all of the external electrodes and all of the ground electrodes are exposed to an upper surface of the cover part, and
• horizontal sides of the external electrodes and horizontal sides of the ground electrodes are positioned on horizontal sides on the upper surface of the cover part.

A common mode filter comprising:

• a base part made of a magnetic material;
• a first primary external terminal provided at one end of a primary coil;
• a second primary external terminal provided at the other end of the primary coil;
• a first secondary external terminal provided at one end of a secondary coil that is magnetically coupled to the primary coil;
• a second secondary external terminal provided at the other end of the secondary coil;
• a first discharge pattern electrically connected to the first primary external terminal;
• a second discharge pattern electrically connected to the second primary external terminal;
• a third discharge pattern electrically connected to the first secondary external terminal;
• a fourth discharge pattern electrically connected to the second secondary external terminal;
• a first ground pattern spaced apart from the first discharge pattern by a first predetermined interval;
• a second ground pattern spaced apart from the second discharge pattern by a second predetermined interval;
• a third ground pattern spaced apart from the third discharge pattern by a third predetermined interval;
• a fourth ground pattern spaced apart from the fourth discharge pattern by a fourth predetermined interval;
• a connection pattern electrically connected to the first, second, third, and fourth ground patterns;
• a first ground terminal electrically connected to the connection pattern;
• a second ground terminal provided so as to oppose the first ground terminal and electrically connected to the connection pattern;
• a first primary external electrode electrically connected to the first primary external terminal and the first discharge pattern;
• a second primary external electrode electrically connected to the second primary external terminal and the second discharge pattern;
• a first secondary external electrode electrically connected to the first secondary external terminal and the third discharge pattern;
• a second secondary external electrode electrically connected to the second secondary external terminal and the fourth discharge pattern;
• a first ground electrode contacting the first ground terminal;
• a second ground electrode contacting the second ground terminal;
• and
• a magnetic material part filled between the first primary external electrode, the second primary external electrode, the first secondary external electrode, the second secondary external electrode, the first ground electrode, and the second ground electrode,
• wherein upper surfaces and two side surfaces of each of the first primary external electrode, the second primary external electrode, the first secondary external electrode, and the second secondary external electrode are exposed to an outside of the magnetic material part, and
• the first ground electrode is positioned between two external electrodes selected from among the first primary external electrode, the second primary external electrode, the first secondary external electrode, and the second secondary external electrode, and the second ground electrode is positioned between the other two external electrodes.