Kyocera Corporation

Hiroyuki Miura

Takayuki Kimura

Ryoma Sasagawa

Katsuhiro Ogasawara

Eiji Kimura

Hisaki Masuda

Takayuki Ohyama

Yoshihiro Uemura

Yuko Tanaka

Shinsuke Kawamori

Toshihiro Saito

A board in an aspect of the present invention includes a substrate, a first film, a first layer, and a second film. The substrate has a first elastic modulus. The first film is at an upper surface of the substrate. The first layer is at a lower surface of the substrate. The first layer has a second elastic modulus lower than the first elastic modulus and has a first thermal expansion coefficient. The second film is at a lower surface of the first layer. The second film includes the same material as the first film and has a second thermal expansion coefficient lower than the first thermal expansion coefficient.

Board and semiconductor apparatus

A crystal unit is provided with a rectangular substrate, a frame which is provided on an upper surface of the substrate, a mounting frame which has joining pads which are provided along the outer circumferential edge of the upper surface and which is provided on the lower surface of the substrate by joining joining terminals provided along the outer circumferential edge of the lower surface of the substrate and its joining pads, a crystal element which is mounted on electrode pads which are provided on the upper surface of the substrate in a region surrounded by the frame, a thermosensitive element which is mounted on connection pads which are provided on the lower surface of the substrate in a region surrounded by the mounting frame, and a lid which is joined to the upper surface of the frame.

Crystal unit

A quartz-crystal oscillator has a configuration wherein a rectangular containeraccommodating a piezoelectric oscillator devicetherein is fixed to a rectangular supporting substrateon which an IC deviceis mounted via spacer membersformed of metal bodies. On the surface of the supporting substrate, part or all of the IC deviceand side faces of the spacer members are coated with a resin material. When the quartz-crystal oscillator is implemented on a main board by soldering or the like, the problem that the solder for bonding the quartz-crystal oscillator to the main board is adhered to the spacer members, thereby causing a short-circuit can be effectively prevented.

Piezoelectric oscillator

Growing community of inventors

Moriyama, Japan

Hiroyuki Miura