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US 2019/0240787 A1Published application
Three-stage process for producing cooling air bores by means of a nanosecond and millisecond laser and component
AssigneeSiemens Aktiengesellschaft
InventorsThomas Beck, Oliver Katzurke, Jens Dietrich
Life of this patent
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Abstract
Through_holes having a high contour accuracy are produced by the multiple use of a nanosecond laser without that the interface between the ceramic layer and the substrate is damaged.
Claims18
A method for producing a through-hole in a ceramic layer system,
- which comprises at least:
- a substrate (4),
- and
- at least one outer ceramic layer,
- the through-hole having an inner part
- which is symmetrical,
- in a cross section,
- and a diffusor,
- which represents a widening of the inner part on the outer surface of the ceramic layer,
- wherein a part of a final geometry of the diffusor is produced first at least in the outermost ceramic layer as far as the substrate by a nanosecond laser by nanosecond pulses,
- wherein a millisecond laser is then used,
- to fully produce the inner part in the final geometry of the through-hole by millisecond pulses in the substrate, and
- in a final working step, the diffusor is produced in its final geometry at least in the ceramic layer by the nanosecond laser by nanosecond pulses.
10 more elements
A component,
- which at least:
- a substrate
- a metallic bonding layer,
- at least one outer ceramic layer,
- a through-hole having
- an inner part of the through-hole,
- the inner part of the through-hole being symmetrical in cross section, and
- a diffuser at least in the ceramic layer,
- which represents a widening of the inner part, and
- wherein the diffuser has an oversize in cross section relative to the inner part.
7 more elements
Dependencies are inferred from the claim text.