Method for generating at least one through-hole and device for carrying out such a method

The method according to claim 8, characterized in that the hollow space (12) of the workpiece (2) is filled with the paste-like protective agent (13) at least along the extension (10) of the laser beam (7) guided through the through-hole (3).

The method according to claim 8, characterized in that the paste-like protective agent (13) is replenished in the hollow space (12) at least during laser drilling of the through-hole (3) resulting by means of the laser beam (7).

A device (1) for carrying out a method having the features according to claim 8, wherein a conveying device (6) is provided which serves to convey the paste-like protective agent (13) into the hollow space (12) of the workpiece (2) and wherein the conveying device is embodied as a screw-conveyor or calender.

A method for generating at least one through-hole (3) in a first wall (9) of a workpiece (2) bounding a hollow space (12) of the workpiece (2), the workpiece having a rear wall (11) bounding the hollow space (12), and the workpiece having an exterior, said method comprising:

• using a laser beam (7) directed onto the first wall (9) from the exterior;
• and introducing a paste-like protective agent (13) into the hollow space (12) of the workpiece (2), the paste-like protective agent (13) being applied in the hollow space (12) at least partially in an extension (10) of the laser beam (7) guided through the through-hole (3) in front of the rear wall (11) of the workpiece (2), wherein the paste-like protective agent (13) is formed on the basis of a ceramic powder in an aqueous solution or in a non-aqueous dispersion, in which powder metallic particles or, respectively, pieces of fiberglass are embedded.