Murata Manufacturing Co., Ltd.

Koichi Nagano

Toshiyuki Baba

Takashi Shimura

Yuusei Oyama

Hideo Mura

Toshikazu Ishiguro

Atsushi Uno

A terminal for a piezoelectric device has a first electrode portion, a second electrode portion folded on the first electrode portion, projections on the first and second electrode portions, and further a vibration absorber between the first and second electrode portions. As the vibration absorber, oil, a non-volatile component of oil, silicone grease, polyamide resin, paper, an anticorrosive, a coating agent, silicone rubber, etc. may be used. Another terminal for a piezoelectric device has a sealant between the first electrode portion and the second electrode portion.

Process for manufacturing a terminal for a piezoelectric device

Terminal for a piezoelectric device

A ladder filter includes two piezoelectric resonators which operate in a stretch vibration mode and stacked on top of each other with a grounding terminal located therebetween. Two piezoelectric resonators which operate in a length vibrating mode are provided at both sides of the piezoelectric resonators which operate in a stretch vibration mode.

Ladder filter having reduced size

An electronic device has terminals and other elements such as piezoelectric elements enclosed inside a box-shaped molded case. One of the terminals which penetrates and fixed to a side wall of the case has one or more raised contact portions for making electrical contact with one of the enclosed elements. Tabs protruding higher than these raised contact portions are provided to this terminal for preventing resin from entering the interior of the case during its molding process. These tabs are fixed to the wall of the case. Externally protruding contacting portions of the terminals are bent toward a bottom wall of the case which is larger than the side wall such that the device can be stably mounted.

Electronic device with molded case

A terminal structure for an electronic device, which can be affixed to a resin case while the latter is being molded, has planar base member having a raised portion at least on one of its surfaces. A protruding piece is provided on the same surface so as to protrude therefrom higher than the raised portion. This protruding piece may be a tab which is cut out from the base member and bent therefrom, or another planar plate which overlaps the base member.

Growing community of inventors

Nagaokakyo, Japan

Koichi Nagano