Removal of material by radiation applied at an oblique angle

Details Removal of material by radiation applied at an oblique angle Removal of material by radiation applied at an oblique angle

1996-07-26

1998-09-01

Goodrow, John

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 12, B08B 312

Patent

active

058006257

ABSTRACT:
An apparatus and method for removing undesired material from the surface of a substrate provides a flow of inert gas over the undesired material substrate surface while irradiating the undesired material with energetic photons directed at an angle that is oblique to the substrate. The invention enables removal of undesired material without altering the physical properties of the material underlying or adjacent the removed, undesired material. In certain circumstances, the non-perpendicular incidence permits effective removal where normal incidence caused damage to the substrate or poor removal or both.

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