Hitachi Cable, Inc.

Hiroki Katayama

Hidetaka Kawauchi

Yoshiaki Ishigami

Juhyun Yu

Kinya Yamazaki

Tenpei Inoue

Yoshinori Sunaga

Akihiro Hiruta

Seiji Maruo

Ryuta Takahashi

Noribumi Kobayashi

Yuuki Naganuma

A transmission/reception optical module has an optical transmission subassembly, an optical reception subassembly, and a circuit boardwherein the circuit boardis formed into one member by a rigid/flexible substrate. Circuit board main bodies, and an optical reception subassembly fixation regionare formed by rigid regionsA,, andP. An area provided between the circuit board main bodyand the optical reception subassemblyis composed of a flexible regionP. A part of the circuit board main bodyis composed of a flexible region

Transmission/reception optical module

There is provided a filter assembly for combining a wavelength multiplexed optical signal by multiplexing optical signals of different wavelength emitted from respective optical devices, and/or for dividing a wavelength multiplexed optical signal into optical signals of different wavelength and causing the optical signals of different wavelength to enter respective optical devices. This filter assembly comprises: a light transmitting member within which each optical signal propagates; plural optical filters disposed on an upper face of the light transmitting member at a predetermined spacing wherein each optical signal passes through the optical filters; upper reflective layers respectively provided between adjacent ones of the optical filters; and a lower reflective layer provided on a lower face of the light transmitting member, and wherein the wavelength multiplexed optical signal propagates along the same optical path within the light transmitting member.

Filter assembly and optical module using same

An electronic component mounted structure has: a circuit board; two semiconductor elements that are mounted on the circuit board; and an AC coupling capacitor that is operable to cut off signals with a predetermined frequency or less and is provided between the two semiconductor elements. The AC coupling capacitor is mounted on the circuit board such that a part or a whole of the AC coupling capacitor is away from the surface of the circuit board.

Electronic component mounted structure and optical transceiver using the same

An optical transmission module has: an optical module having an optical element and a receptacle portion; a circuit board that is electrically connected to the optical module through an electrical connection member; and a housing in which the optical module and the circuit board are placed. The optical module is in surface-contact with and fixed onto the housing. The receptacle portion and the circuit board are not in contact with the housing. The receptacle portion is restricted in position while having a positional degree of freedom at least in a direction perpendicular to an optical axis of light emitted from the optical element. The circuit board is restricted in position while having a positional degree of freedom at least in a direction of the optical axis.

Optical transmission module

A mounting structure for electronic components is provided with a circuit board that has a step portion formed at one end portion thereof. The step portion is sandwiched by a lead of the electronic component so as to secure the lead to the step portion. The step portion is formed by perforating a region on one surface of the circuit board, and then peeling a part of the circuit board corresponding to the perforated region so as to reduce the thickness of the circuit board at the region.

Mounting structure for electronic components

An optical transceiver has: an optical subassembly that has a built-in chip portion and a receptacle portion; a board electrically connected to one end of the built-in chip portion; a housing that houses the optical subassembly and the board; and a holding member to hold the optical subassembly.

Growing community of inventors

Hitachi, Japan

Hiroki Katayama