Multilayer ceramic capacitor, manufacturing method therefor, circuit board having multilayer ceramic capacitor embedded therein, and polishing device for multilayer ceramic capacitor

A circuit board having a multilayer ceramic capacitor embedded therein, the circuit board comprising:

• a circuit board part provided with a groove for receiving an electronic component;
• and
• a multilayer ceramic capacitor including a 0603-sized ceramic body including a dielectric layer and a cover layer;
• first and second internal electrodes disposed to face each other, while having the dielectric layer interposed therebetween;
• and a first external electrode electrically connected to the first internal electrode and a second external electrode electrically connected to the second internal electrode, and disposed in the groove,
• wherein in a length-thickness (L-T) cross-section of the ceramic body, in the case in which a square is defined as including sides parallel to a central portion of a first main surface of the ceramic body, and vertices disposed in a diagonal direction on outer surfaces of the ceramic body, the sides having a length of 30 μm, when an area of a region of the square not occupied by the ceramic body is defined as A-out and a thickness of the cover layer is defined as t, the following Equations are satisfied:
• 10 μm2≦A-out and A-out/t≦3.5 m.

A manufacturing method for a multilayer ceramic capacitor, the manufacturing method comprising:

• preparing ceramic green sheets;
• forming internal electrode patterns on the ceramic green sheets using a conductive paste for an internal electrode;
• forming a 0603-sized ceramic body including first and second internal electrodes disposed to face each other, a dielectric layer, and a cover layer therein, by stacking the ceramic green sheets having the internal electrode patterns formed thereon and the ceramic green sheets having no internal electrode patterns formed thereon, and then firing the stacked ceramic green sheets;
• polishing edges of the ceramic body;
• and
• forming a first external electrode electrically connected to the first internal electrode and a second external electrode electrically connected to the second internal electrode,
• wherein in a length-thickness (L-T) cross-section of the ceramic body, in the case in which a square is defined as including sides parallel to a central portion of a first main surface of the ceramic body, and vertices disposed in a diagonal direction on outer surfaces of the ceramic body, the sides having a length of 30 μm, when an area of a region of the square not occupied by the ceramic body is defined as A-out and a thickness of the cover layer is defined as t, the following Equations are satisfied:
• 10 μm2≦A-out and A-out/t≦3.5 m.

A polishing device comprising:

• a revolving table having a rotation axis in a direction perpendicular to a direction of gravity;
• a polishing tank disposed on a surface of the revolving table, having a rotation axis in the direction perpendicular to the direction of gravity, and including a 0603-sized ceramic body and a polishing element introduced therein;
• a polishing tank rotation controlling part controlling rotation of the polishing tank;
• and
• a revolving table rotation controlling part controlling rotation of the revolving table,
• wherein the rotation axes of the polishing tank and the revolving table are formed at different positions to be in parallel to each other.