Multilayer ceramic capacitor
A technology of ceramic capacitors and laminates, applied in the direction of laminated capacitors, capacitors, fixed capacitors, etc., can solve problems such as inability to ensure strength and peeling
Active Publication Date: 2021-10-22
MURATA MFG CO LTD
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- Description
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- Application Information
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Problems solved by technology
[0011] However, if different materials are used for the lower outer layer and the upper outer layer, peeling between the different materials tends to occur, and sufficient strength cannot be ensured.
Method used
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Embodiment Construction
[0047] Hereinafter, the multilayer ceramic capacitor 1 according to the embodiment of the present invention will be described. figure 1 It is a schematic perspective view of multilayer ceramic capacitor 1 according to the embodiment, showing a state of being mounted on substrate 200 . figure 2 yes figure 1 A cross-sectional view of the multilayer ceramic capacitor 1 taken along line II-II. image 3 yes figure 1 A cross-sectional view of the multilayer ceramic capacitor 1 taken along line III-III.
[0048] Multilayer ceramic capacitor 1 has a substantially rectangular parallelepiped shape, and includes a laminated body 2 and a pair of external electrodes 3 provided at both ends of the laminated body 2 . The laminated body 2 includes an inner layer portion 11 including a plurality of sets of dielectric layers 14 and internal electrode layers 15 .
[0049] In the following description, the direction in which the pair of external electrodes 3 are provided in the multilayer ce...
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Abstract
In order to suppress the generation of ''acoustic noise'', a multilayer ceramic capacitor is known which suppresses the transmission of vibration from the multilayer ceramic capacitor to the substrate by making the upper outer layer portion thicker than the lower outer layer portion. The multilayer ceramic capacitor includes a multilayer body and external electrodes. The multilayer body includes an inner layer portion including dielectric layers and internal electrode layers alternately stacked, and first and second outer layer portions on opposite sides of the inner layer portion in a stacking direction, side gap portions on opposite sides in a width direction, main surfaces on opposite sides in the stacking direction, side surfaces on opposite sides in the width direction, and end surfaces on opposite sides in a length direction. Each external electrode is provided at one end surfaces of the multilayer body, and extends from the end surface to a portion of the main surface. A difference in location between ends at the side surface of two adjacent internal electrode layers is about 0.5 mu m or less. The second outer layer portion is thicker than the first outer layer portion. The thickness of the side gap portion is less than 10 mu m.
Description
technical field [0001] The present invention relates to laminated ceramic capacitors. Background technique [0002] In recent years, multilayer ceramic capacitors with large capacitance and small size have been demanded. Such a multilayer ceramic capacitor has an inner layer portion in which dielectric layers which are ferroelectric materials with a relatively high dielectric constant and internal electrodes are alternately stacked. Then, the dielectric layers serving as the outer layer parts are arranged above and below the alternately stacked inner layer parts to form a rectangular parallelepiped laminated body main body. In addition, side gap portions (sidegap portions) are formed on both side surfaces in the width direction of the rectangular parallelepiped laminated body main body, and external electrodes are formed on both end surfaces in the longitudinal direction. [0003] However, since the dielectric layer has piezoelectricity and electrostrictive properties, str...
Claims
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IPC IPC(8): H01G4/005H01G4/30H01G4/12
CPCH01G4/005H01G4/30H01G4/12H01G2/065H01G4/012H01G4/1227H01G4/232H01G4/1209H01G4/2325H01G2/02Y02E60/13H01G4/248
Inventor 池田充
Owner MURATA MFG CO LTD