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US 6,674,043 B2Granted
Method and apparatus for marking glass with a laser
AssigneeSchott Glas
InventorsUlla Trinks, André Witzmann
Life of this patent
Estimating the term…
Abstract
In an apparatus and a method for marking glass with a laser, the glass is first brought to a temperature above the transformation temperature of the glass. The glass is then acted upon by a laser pulse which produces a mark on the surface of the glass. The peak power of the laser pulse is preferably selected so that it is merely a thermal interaction with the glass surface which occurs. This has the advantage that the material properties of the marked glass remain unchanged compared with the unmarked product.
Claims9
A method of marking glass, comprising the following steps:
- a) selecting a marking position as a position along a glass drawing process at which the glass is above its transformation temperature,
- b) acting upon the glass at the marking position with a laser pulse to apply a mark to a surface of the glass.
Dependencies are inferred from the claim text.