Removal of the Metal Oxide Layer From a Metal by Laser-Assisted Hydrogen Reduction
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-06
By using a laser as a heat source, an oxide layer that is present on metals can be removed through hydrogen reduction. The basic equation for the reduction is: MxOy + YH2 z XM + YH2O Since the adsorptivity and thermal stability of the oxide will vary with the metal, a different frequency and power dosage will be required for different metals. By using a laser, projection techniques can be employed to remove the oxide in specific, well-defined areas, while those areas not exposed to the laser remain unaffected. This technique can be adopted and adapted to in situ treatment processes and can be used wherever metal oxide removal is desired, such as in preparing a metal for soldering. In addition, this technique can be used to remove oxides from semiconductors, such as SiO2 from Si.