Capacitor, capacitor mounting structure, and taped electronic component series

Patent metadata

Field	Value
Publication number	US-9754722-B2
Application number	US-201715403207-A
Country	US
Kind code	B2
Filing date	Jan 11, 2017
Priority date	Nov 5, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

In a capacitor main body, a dimension along the thickness direction of a first region where a first inner electrode and a second inner electrode are provided is t 1 , a dimension along the thickness direction of a second region that is positioned on the side of a first main surface relative to the first region is t 2 , and a dimension along the thickness direction of a third region that is positioned on the side of a second main surface relative to the first region is t 3 . A condition of t 2 /t 1 >about 0.15 and a condition of t 3 /t 1 >about 0.15 are satisfied.

First claim

What is claimed is:

1. A capacitor comprising:
a capacitor main body including a first main surface and a second main surface which extend along a longitudinal direction and a width direction, a first side surface and a second side surface which extend along the longitudinal direction and a thickness direction, and a first end surface and a second end surface which extend along the width direction and the thickness direction; and
a first inner electrode and a second inner electrode provided in the capacitor main body and opposing each other via a ceramic section; wherein
the ceramic section includes ferroelectric ceramics;
in the capacitor main body, a dimension along the thickness direction of a first region where the first and second inner electrodes are provided is t 1 ;
in the capacitor main body, a dimension along the thickness direction of a second region that is positioned on a side of the first main surface relative to the first region is t 2 ;
in the capacitor main body, a dimension along the thickness direction of a third region that is positioned on a side of the second main surface relative to the first region is t 3 ;
a condition of t 2 /t 1 >about 0.07 and a condition of t 3 /t 1 >about 0.07 are satisfied; and
a distance along the width direction from a portion where both the first and second inner electrodes of the capacitor main body are provided to the first side surface is w 2 and a distance along the width direction from a portion where both the first and second inner electrodes of the capacitor main body are provided to the second side surface is w 3 , and t 2 and t 3 are greater than w 2 and w 3 , respectively;
the first and second main surfaces have a different color depth than a color depth of the first and second side surfaces; and
a belt-shaped pattern in the longitudinal direction is provided on the first and second side surfaces.

2. The capacitor according to claim 1 , wherein a condition of about 2.0>t 3 /t 2 >about 0.5 is satisfied.

3. The capacitor according to claim 1 , wherein t 2 and t 3 are equal or substantially equal to each other.

4. The capacitor according to claim 1 , wherein the first inner electrode and the second inner electrode oppose each other in the thickness direction.

5. The capacitor according to claim 1 , wherein a dimension of the capacitor main body along the longitudinal direction is about 0.6 mm to about 1.8 mm, a dimension of the capacitor main body along the width direction is about 0.3 mm to about 1.0 mm, and a dimension of the capacitor main body along the thickness direction is about 0.3 mm to about 1.2 mm.

6. The capacitor according to claim 1 , wherein an electrostatic capacity of the capacitor is no less than about 1 μF and a thickness of the ceramic section is no more than about 1 μm.

7. The capacitor according to claim 1 , wherein an electrostatic capacity of the capacitor is no less than about 10 μF and a thickness of the ceramic section is no more than about 1 μm.

8. The capacitor according to claim 1 , wherein a dimension of the capacitor main body in the thickness direction is t 0 , and a condition t 1 /t 0 >about 0.6 and a condition of 1.2>t 3 /t 2 >about 0.8 are satisfied.

9. The capacitor according to claim 1 , wherein a condition of t 2 /t 1 >0.15 and a condition of t 3 /t 1 >0.15 are satisfied.

10. The capacitor according to claim 1 , wherein a condition of t 2 /t 1 >0.3 and a condition of t 3 /t 1 >0.3 are satisfied.

11. The capacitor according to claim 1 , wherein a dimension of the capacitor main body along the width direction is w 0 , and w 0 is about 0.9 to about 1.1 times to.

12. The capacitor according to claim 1 , wherein t 2 and t 3 are greater than w 2 and w 3 by no less than about 10 μm, respectively.

13. The capacitor according to claim 1 , wherein t 2 and t 3 are greater than w 2 and w 3 by no less than about 30 μm, respectively.

14. The capacitor according to claim 1 , wherein at least one of w 2 and w 3 is no more than about 80 μm.

15. The capacitor according to claim 1 , wherein at least one of w 2 and w 3 is no more than about 60 μm.

16. A capacitor mounting structure comprising:
the capacitor according to claim 1 ; and
a mounting board on which the capacitor is mounted; wherein
the capacitor is mounted so that the second main surface opposes the mounting board.

17. A taped electronic component series comprising:
the capacitor according to claim 1 ; and
a tape including a plurality of recesses that are arranged along the longitudinal direction and in each of which the capacitor is accommodated; wherein
the capacitor is disposed so that the second main surface opposes a bottom surface of the recess.

Assignees

• Murata Manufacturing Co

Inventors

• Yamada Tadateru

Classifications

• H01G4/1227

  based on alkaline earth titanates · CPC title

• H05K2201/10681

  Tape Carrier Package [TCP]; Flexible sheet connector · CPC title

• H05K1/181

  associated with surface mounted components · CPC title

• H01G4/30 Primary

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• H05K2201/10015

  Non-printed capacitor · CPC title