Ceramic capacitor

セラミックコンデンサ

Abstract

(57)【要約】 【構成】 誘電体磁器層と長方形状の内部電極25a、25 bとを積層して形成したコンデンサ部26を有するチップ 本体24と、チップ本体24の内部電極25a、25bと平行な 一主面上に形成した一対の基板用電極27a、27bとから 成るセラミックコンデンサ23において、内部電極25a、 25bの短辺の長さAと長辺の長さBとの比A/Bを 0.5 以下とすると共に、内部電極25a、25bの中央部に長辺 方向に沿って複数のビアホール28a、28bを列状に配設 し、基板用電極27a、27bと内部電極25a、25bとを一 つおきのビアホール28a、28bを介して接続する。 【効果】 コンデンサに生じるインダクタンスを非常に 小さく抑制でき、高速化された回路モジュールにおいて もノイズ発生による電圧レベルの変動に起因する誤動作 を引き起こさない、極めて低インダクタンスのセラミッ クコンデンサが得られる。
PURPOSE:To obtain a ceramic capacitor with extremely low inductance in which the inductance generating in a capacitor can be suppressed very small and no mulfunction to be caused by the variation of high voltage level due to noise generation occurs even in a high-speed circuit module. CONSTITUTION:A ceramic capacitor 23 is comprised of a chip body 24 having a capacitor part 26 that is formed by laminating a dielectric ceramic layer and rectangular inner electrodes 25a and 25b, and a pair of electrodes 27a and 27b that are formed on one main surface parallel to the inner electrodes 25a and 25b of the body 24. A ratio A/B of the short-side length A to long-side length B of the electrodes 25a and 25b is set to 0.5 or less, and at the same time, a plurality of via holes 28a and 28b are formed in the central part of the electrodes 25a and 25b in a line along the long-side direction and the electrodes 27a and 27b and electrodes 25a and 25b are connected with each other through the alternate via holes 28a and 28b.

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