Patent ID: 11935863
Assignee: DISCO CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 0:
1. A laser reflow apparatus for reflowing solder bumps disposed on a side of a semiconductor chip in a workpiece and included in an irradiation range on the workpiece by applying a laser beam to an opposite side of the semiconductor chip, the laser reflow apparatus comprising:
a spatial beam modulation unit including a laser power density setting function to locally set the laser power density in the irradiation range of a laser beam emitted from a laser beam source; and
image focusing means configured and arranged unit to focus the laser beam emitted from the laser beam source and apply the focused laser beam to the irradiation range on the workpiece,
wherein the spatial beam modulation unit is of the phase modulation type and is configured and arranged such that an entrance surface of the spatial beam modulation unit and a laser irradiation surface of the workpiece are nonconjugate with each other.