Patent ID: 9711187
Date: 2017-07-18
CPC Classifications: B23K,G11B

Claim:
1. A method of manufacturing a disk device comprising an enclosure comprising a base and a cover; and a rotatable disk-shaped recording medium provided in the enclosure, the method comprising: arranging the recording medium in the base; and laser-welding a peripheral edge portion of the cover, which is put over an opening of the base, to the base by using a laser beam, wherein the laser welding comprises pulse-irradiating the peripheral edge portion of the cover with the laser beam while repeatedly turning on and off output of the laser beam, moving a point irradiated with the laser beam along the peripheral edge portion, setting a pitch of laser beam irradiation to be greater than a width of a weld bead formed by the laser beam irradiation, the laser beam irradiation is performed while making circuits of the peripheral edge portion of the cover, and the laser welding comprises forming first beads along the entire peripheral edge portion of the cover with the irradiation pitch greater than the width of the weld bead by the laser beam irradiation in a first circuit, and forming second beads along the entire peripheral edge portion of the cover with the irradiation pitch greater than the width of the weld bead to partially overlap the first beads by the laser beam irradiation in a second circuit.