Patent ID: 8779381

Claim:
An aperture unit for a particle beam device, comprising: at least one aperture body having at least one first side and at least one second side; at least one aperture opening allowing passage of particles from the first side of the aperture body to the second side of the aperture body, wherein the at least one aperture opening extends from the first side of the aperture body to the second side of the aperture body; and at least one deposit supporting unit that is a unit for depositing residual gas in a region of the at least one deposit supporting unit, wherein at least one of the following features is further provided: (i) the at least one deposit supporting unit includes at least one first, three-dimensionally embodied deposit supporting unit for producing interaction particles or interaction radiation arranged at the first side of the aperture body, wherein the first deposit supporting unit projects according to at least one of: (a) into the aperture body proceeding from the first side of the aperture body or (b) in a direction opposite to the first side of the aperture body proceeding from the first side of the aperture body, and wherein the first deposit supporting unit is arranged at a distance from a first edge of the aperture opening; or (ii) the at least one deposit supporting unit includes at least one second, three-dimensionally embodied deposit supporting unit for producing interaction particles or interaction radiation arranged at the second side of the aperture body, wherein the second deposit supporting unit projects according to at least one of: (a) into the aperture body proceeding from the second side of the aperture body or (b) in a direction opposite to the second side of the aperture body proceeding from the second side of the aperture body, and wherein the second deposit supporting unit is arranged at a distance from a second edge of the aperture opening.