Murata Manufacturing Co., Ltd.

Kenji Kawabata

Yukio Sakabe

Isamu Fujimoto

Osamu Yamaoka

Tetsuo Tatsumi

Etsuo Nishikawa

Tomomitsu Yamanishi

Hiroyuki Ishizaki

Tomohiro Kawanishi

A support structure of a piezoelectric vibrator greatly increase a bonding strength between a conductive bonding agent and a mounting substrate. The support structure may be provided in a piezoelectric transformer, a piezoelectric vibrator, a gyroscope, and a multilayered piezoelectric component. The mounting substrate has first to third terminal electrodes provided on both top and bottom surfaces thereof and includes first to third through holes being provided at a central portion of the terminal electrodes, respectively. After the piezoelectric transformer element is positioned on the mounting substrate such that the transformer element is spaced slightly apart from the top surface of the mounting substrate by a predetermined distance, a conductive bonding agent is applied to the node N of vibration of an input electrode of the piezoelectric transformer element and the first terminal electrode, and the first through hole is filled with the conductive bonding agent. Similarly, the conductive bonding agent is applied to an output electrode and the second terminal electrode of the piezoelectric transformer, and the third through hole is also filled with the conductive bonding agent.

Support structure for electronic component

A dielectric ceramic composition contains 100% by weight of main component composed of about 35 to 55% by weight of SrTiO , about 10 to 35% by weight of PbTiO , about 5 to 12% by weight of CaTiO , about 8 to 25% by weight of Bi O and about 5 to 13% by weight of TiO , and about 0.02 to 0.5% by weight of MnO, about 0.05 to 2% by weight of an oxide of at least one element selected from the group consisting of La, Ce, Nd, Pr, Sm, Dy, Er and Y, and about 0.02 to 0.8% by weight of CuO. The dielectric ceramic composition can provide a capacitor which exhibits a low loss and a high dielectric constant, and which can be used in the high frequency region, thereby permitting the advance in miniaturization of the capacitor.

Dielectric ceramic composition

A piezoelectric transformer includes a piezoelectric transforming element supported at its vibrational node region N on a base plate through a resilient adhesive member. Input electrodes of the piezoelectric transforming element are electrically connected to input electrode connecting lands of the base plate through a conductive adhesive which is adapted to be freely deformed according to the vibration of the piezoelectric transforming element. An output electrode of the piezoelectric transforming element is electrically connected to an output electrode connecting land of the base plate through a lead wire or a conductive adhesive.

Piezoelectric transformer including resilient adhesive support

A dielectric ceramic composition comprises a main component comprising, in percent by weight, 32 to 47% SrTiO.sub.3, 26.5 to 46% PbTiO.sub.3, 8 to 16% CaTiO.sub.3, 5 to 16% Bi.sub.2 O.sub.3, and 3 to 10% TiO.sub.2 ; ZnO in an amount of 1 to 3.8% of the total composition; and SiO.sub.2 in an amount of 1 to 3.8% of the total composition. The dielectric ceramic composition having a high dielectric constant, a small voltage dependence of dielectric properties, and a low firing temperature.

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Shiga-ken, Japan

Kenji Kawabata