Method of short pulse hole drilling without a resultant pilot hole and backwall damage
OwnerPaul S. Banks, Brent C. Stuart +1inventors
InventorsPaul S. Banks, Brent C. Stuart, Michael D. Perry
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Abstract
A method for removing material via a laser so as to reduce the formation of channels comprising the steps of emitting a laser pulse comprising a pulse energy, a pulse duration, and a fluence towards a surface of a drilling material the fluence of a value sufficient to avoid the formation of a channel in the drilling material at the surface to form a hole comprising a side wall and a bottom, shaping a spatial profile of the laser pulse such that the fluence is substantially uniform across the spatial profile; and emitting at least one subsequent laser pulse having a pulse energy, a pulse duration, and a fluence sufficient to avoid the formation of a channel at the bottom of the hole.
Claims11
A method for removing material via a laser so as to reduce
- the formation of channels comprising the steps of:
- emitting a laser pulse comprising a pulse energy, a pulse duration, and a fluence towards a surface of a drilling material said fluence of a value sufficient to avoid the formation of a channel in said drilling material at said surface to form a hole comprising a side wall and a bottom;
- shaping a spatial profile of said laser pulse such that said fluence is substantially uniform across said spatial profile;
- and
- emitting at least one subsequent laser pulse having a pulse energy, a pulse duration, and a fluence sufficient to avoid the formation of a channel at said bottom of said hole.
Dependencies are inferred from the claim text.