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US 2001/0055192 A1Published application
Multilayer capacitor
AssigneeTDK Corporation
InventorsYukie Nakano, Takako Hibi, Mari Miyauchi, Daisuke Iwanaga
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AssigneeTDK Corporation
InventorsYukie Nakano, Takako Hibi, Mari Miyauchi, Daisuke Iwanaga
Estimating the term…
Disclosed is a multilayer capacitor capable of preventing the occurrence of cracks by inhibiting the multilayer capacitor from expanding in a stacking direction and a width direction. The multilayer capacitor comprises a capacitor element (10) in which dielectric layers (11a and 11b) and internal electrodes (12) are alternately stacked. The capacitor element (10) is obtained by stacking and firing a dielectric paste layer and an internal electrode paste layer. An expansion coefficient x in the stacking direction lies between −0.05i % and 0.05i % inclusive, where i denotes the number of dielectric layers (11a), preferably the expansion coefficient x is 0% or less, or more preferably the expansion coefficient x lies between −10% and 0% inclusive. Preferably, an expansion coefficient y in the width direction lies between −0.05i % and 0% inclusive. The expansion coefficients x and y can be controlled by adding a carbon material or a lithium-containing compound to the internal electrode paste layer, or by reducing a thickness of the dielectric layer (11b) located in an outermost portion. Thus, the occurrence of cracks is inhibited, and therefore a fraction defective is reduced.
A multilayer capacitor comprising a capacitor element in which dielectric layers and internal electrodes are alternately stacked, wherein an expansion coefficient x of the capacitor element in a stacking direction lies between −0.05×i (%) and 0.05×i (%) inclusive, where i denotes the number of dielectric layers, each of which is sandwiched between the internal electrodes.
A multilayer capacitor comprising a capacitor element in which dielectric layers and internal electrodes are alternately stacked, wherein the expansion coefficient x of the capacitor element in the stacking direction lies between −0.10 (%) and 0 (%) inclusive.
A multilayer capacitor comprising a capacitor element in which dielectric layers and internal electrodes are alternately stacked, wherein an expansion coefficient y of the capacitor element in a width direction lies between −0.05×i (%) and 0 (%) inclusive, where i denotes the number of dielectric layers, each of which is sandwiched between the internal electrodes.
Dependencies are inferred from the claim text.