Murata Manufacturing Co., Ltd.

Yoshitaka Kageyama

Shinichi Kobayashi

Osamu Yamaoka

Akira Nagai

Shuji Watanabe

Yuko Ihara

Harunobu Sano

Mitsuru Nagashima

Kazuhiro Harada

Toshiya Esumi

A capacitor including a ceramic body, a glass layer formed on each of opposite surfaces of the ceramic body, and a first metallic layer formed on the glass layer. Preferably, a lead terminal is connected to the first metallic layer or to a second metallic layer which is provided on the first metallic layer, by use of solder containing Pb in an amount of 2.5 wt. % or less. Preferably, a lead terminal which is plated with a substance containing Pb in an amount of 5 wt. % or less is soldered onto the first metallic layer or the second metallic layer.

Capacitor

A pulse generating capacitor is provided in which a capacitor element has electrodes provided on the front and rear faces thereof, and lead terminals connected to the electrodes by means of bonding members. The bonding members can contain Ag as a major component with a ZrO powder added thereto at a content of about 20% to 60% by volume. The capacitor solves a problem of crack generation on the capacitor element in response to thermal cycling, while maintaining the effects of preventing its pulse voltage from being decreased and enhancing the bonding strength of its lead terminals.

Pulse generating capacitor

An inexpensive capacitor for pulse generation whose characteristics do not deteriorate even when the capacitor is used in a high temperature, high vacuum, reducing atmosphere, and which enables generation of high-voltage pulses over a wide temperature range. The dielectric body of the capacitor is constructed of a non-linear dielectric ceramic which exhibits resistance to reduction. The non-linear dielectric ceramic comprises a polycrystalline substance containing barium titanate as a primary component, and when the polycrystalline substance is represented by (1&minus;a&minus;b)ABO &plus;aM&plus;bR wherein ABO is a barium titanate component and represents a perovskite structure, M is an oxide of at least one element selected from the group consisting of Mn, Ni and Co, R is an oxide of at least one element selected from the group consisting of La, Ce, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb, and a and b represent mole fractions; A, B, a, and b satisfy the following relationships: 1.000&lE;A/B&lE;1.006 (mole ratio), 0.3&lE;b/a&lE;3, 0.0015&lE;a&lE;0.0050, and 0.0015&lE;b&lE;0.0050, and a total content of M and R represented by Ad satisfies 0.3<Ad&lE;1.0 (wt. %).

Dielectric ceramic and a capacitor using the same

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Izumo, Japan

Yoshitaka Kageyama