Oclaro Japan, Inc.

Nokia Solutions and Networks Oy

Fumitoshi Goto

Kazuhiro Komatsu

Takuma Ban

Yoichiro Igarashi

Masafumi Shiohara

Takaaski Sato

An optical module includes: a first circuit board including a first signal terminal part and a first ground terminal part formed on a front surface; and a second circuit board including a second signal terminal part and a second ground terminal part formed on a back surface. The first circuit board further includes: a first dielectric layer; a first signal wire formed on a front surface of the first dielectric layer; a first ground conductor layer formed on a back surface of the first dielectric layer; and a first through ground conductor passing through the first dielectric layer. The first ground terminal part is formed, in a first region and a second region respectively located on both sides of the first signal terminal part in a first direction, and in a third region prescribed at a location beyond the first signal terminal part in a second direction.

Optical module, optical transceiver, printed circuit board, and flexible printed circuit board

A flexible wiring board includes a conductive film provided on one surface of a substrate. The conductive film includes a plurality of pad portions to which a plurality of connection electrodes are respectively bonded with solder, and a wiring portion extending in a direction crossing a row in which the plurality of pad portions are arranged. The plurality of pad portions include a terminal portion electrically connected with the wiring portion, and at least two land portions located on both sides of the terminal portion while avoiding electrical connection to the wiring portion. The solder includes land solder portions respectively overlaid on the at least two land portions and a terminal solder portion overlaid on the terminal portion. The land solder portion has a shape extending longer than the terminal solder portion along a direction in which the wiring portion extends from the connection electrode corresponding thereto.

Optical module

A plurality of radio access units form the single cell of a first communication system, while forming respective individual multi-cells of a second communication system within the single cell. The plurality of radio access units transmit a downstream signal of the first communication system input from a main unit to a terminal using the first communication system of the single cell, while each transmitting a downstream signal of the second communication input from the main unit to a terminal using the communication system of the corresponding respective one of the multi-cells.

Growing community of inventors

Kanagawa, Japan

Fumitoshi Goto