Patent ID: 7837925

Claim:
A method of drilling holes in a component made of a ceramic matrix composite with a laser beam, wherein said method comprises: a percussion first step during which an initial hole, having an initial diameter and a hole axis, is drilled by focusing the laser beam in the thickness of the component to be drilled; a trepanning second step during which an intermediate hole, coaxial with the initial hole and having a larger diameter than that of the initial hole, is drilled by shifting the laser beam and then making the laser beam rotate about the hole axis; and a third step during which the laser beam is centered on the initial hole axis and enlarged within said intermediate hole from a first diameter smaller than said intermediate hole to a second diameter reaching slag present on an inside of the intermediate hole and wherein pulses of the enlarged laser beam are triggered during said third step so as to destroy said slag with said pulses to obtain a final hole.