Denso Corporation

Adamant Namiki Precision Jewel Co., Ltd.

Mitsuhiko Mizuno

Takayoshi Honda

Dai Ito

Tadahisa Iikubo

Masaru Sasaki

Kaoru Torii

Hiroyuki Fujiwara

Ren Watanabe

Provided is an optical branching/coupling device in which optical transmission quality is improved by preventing a reduction in optical transmission quality, the reduction being due, for example, to an optical waveguide core affecting a light of another optical waveguide core in the vicinity of a joining section of the two optical waveguide cores. This optical branching/coupling device includes: a first optical waveguide that is provided extending from one end side to other end side; a second optical waveguide that is provided extending on a separate route from the one end side to the other end side, the other end side of the second optical waveguide being joined to the other end side of the first optical waveguide; and a cladding layer that covers the periphery of the first optical waveguide and the second optical waveguide, wherein the first and second optical waveguides comprise a cured product of a photocuring resin.

Optical branching/coupling device and optical transmission/reception module

An electronic device has: a connector having plural kinds of terminals with respectively different cross section shapes; and a substrate having a plurality of through-holes with lands formed therein. In the electronic device, a width Wof an insertion portion of the first terminal, a width Wof an insertion portion of the second terminal, a land-inclusive hole diameter Dof the first through-hole, and a land-inclusive hole diameter Dof the second through-hole are configured to fulfill conditions of W&#x3c;W, D&#x3c;D, and W&#x2212;W&#x3e;D&#x2212;D, for the improvement of connection reliability between the land and the terminal while restraining dropping of reflow solder in a connector mounting process.

Electronic device

Growing community of inventors

Kasugai, Japan

Mitsuhiko Mizuno