Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Masafumi Momose

Tetsuya Dewa

A manufacturing method for a circuit board in which a pin inserted in a through-hole of a land is welded to the land is disclosed. The land is covered with a white layer, and an irradiation angle of a laser beam with respect to the circuit board is adjusted so that reflected light of the laser beam emitted to the pin reaches the white layer on the land. As the reflected light of the laser beam is allowed to reach a white region provided on the land, the reflected light is scattered on the white region. A rate of absorption of the laser beam by the land is decreased, and a temperature increase of the land is restrained. As a result, a damage of an insulating part around the land is restrained.

Circuit board manufacturing method

A power converter includes: a power conversion circuit; and an electronic control unit configured to output plural control commands for a first switching element and a second switching element to the power conversion circuit. The electronic control unit is configured to output a first drive command, a second drive command, a first drive stop command, and a second drive stop command. The first drive command is a command to turn on the first switching element. The second drive command is a command to turn on the second switching element. The first drive stop command is a command to turn off the first switching element regardless of presence or absence of the first drive command. The second drive stop command is a command to turn off the second switching element regardless of presence or absence of the second drive command.

Growing community of inventors

Anjo, Japan

Masafumi Momose