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US 2007/0175872 A1Published application
Laser back wall protection by particulate shading
OwnerLawrence Rhoades, James Gilmoreinventors
Life of this patent
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Abstract
Methods of preventing ablation damage to a second wall or an underlying second article during the laser drilling of a first wall or an overlying first article are presented. The methods include a step of providing a dry, stable particulate material between the first and second walls or articles to shade the second wall or article from direct laser beam illumination during the laser machining of the first wall or article.
Claims39
A method comprising the steps of:
- a) providing an article having a cavity defined in part by a first wall and a second wall;
- b) filling at least a portion of said cavity with a dry, stable particulate material so that the particles of said particulate material have interparticle contact with adjacent other particles of said particulate material;
- and
- c) illuminating at least a portion of said particulate material by passing a laser beam through a hole in said first wall, said particulate material shading said second wall from the laser beam during said illuminating, wherein said shading prevents said laser beam from ablating a surface of said second wall.
1 more element
A method comprising the steps of:
- a) spatially separating a first and a second article;
- b) placing a dry, stable particulate material in at least a portion of the space between said first and second articles so that the particles of said particulate material have interparticle contact with adjacent other particles of said particulate material;
- and
- c) illuminating at least a portion of said particulate material by passing a laser beam through a hole in said first article, said particulate material shading said second article from the laser beam during said illuminating, wherein said shading prevents said laser beam from ablating a surface of said second article.
1 more element
Dependencies are inferred from the claim text.