Kyocera Corporation

Tsuyoshi Teramura

Norikazu Ito

Eiji Kimura

Takemichi Honma

A crystal device includes a rectangular shaped substrate, a mounting frame which is along an outer circumferential edge of a lower surface of the substrate on its short-side sides and configures a recessed part, electrode pads on an upper surface of the substrate, connection pads on the lower surface of the substrate in the mounting frame, a crystal element mounted on the electrode pads, a temperature sensing element mounted on the connection pads, and a lid air-tightly sealing the crystal element. The electrode pads and the recessed part do not overlap in a plane perspective view.

Crystal device and electronic apparatus using this crystal device

In a crystal unit, a substrate is rectangle-shaped. A frame includes a pair of portions located in regions on the sides of a pair of short sides of the substrate on the lower surface of the substrate and forms a concave portion between these pair of portions. An electrode pad is located on the upper surface of the substrate. A connection pad is located on the lower surface of the substrate within the frame. A plurality of external terminals are located on the lower surface of the frame. A crystal element is mounted on the electrode pad. A temperature sensing element is mounted on the connection pad. A ratio S/Sof an area Sof a rectangular region formed by an outer edge of the lower surface of the frame and an area Sof a smallest rectangular region containing all of the external terminals is 0.75 to 0.91.

Piezoelectric device and electronic apparatus

To improve the yield of a solar cell in its production process, a solar cell includes a semiconductor substrate including a first main surface and a second main surface corresponding to the backside of the first main surface, a busbar electrode on a line extending in a first direction on the second main surface, and end-portion electrodes each being an extension of the busbar electrode on the second main surface and separated from the busbar electrode, and each of the end-portion electrodes having a larger thickness than that of the busbar electrode.

Growing community of inventors

Moriyama, Japan

Tsuyoshi Teramura