Patent ID: 8541739

Claim:
A charged particle beam system, comprising: a charged particle beam generator configured to generate a charged particle beam having a beam path; a first lens configured to focus the charged particle beam generated in an object plane; a second lens located downstream of the object plane along the beam path, the second lens having a diffraction plane; a first lens doublet located downstream of the second lens along the beam path, the first lens doublet comprising a third lens and a fourth lens, the first lens doublet being configured to image the diffraction plane into a first intermediate diffraction plane; a first multipole located at the first intermediate diffraction plane; a second lens doublet located downstream of the first multipole along the beam path, the second lens doublet comprising a fifth lens and a sixth lens, the second lens doublet being configured to image the first intermediate diffraction plane into a second intermediate diffraction plane; a second multipole located at the second intermediate diffraction plane; a first deflection system upstream of the object plane along the beam path, the first deflection system being configured to tilt the charged particle beam about the object plane so that the charged particle beam is obliquely incident on the object plane; and a second deflection system located downstream of the third lens along the beam path and upstream of the fourth lens along the beam path, the second deflection system being configured to tilt the charged particle beam to compensate for tilting of the charged particle beam due to the first deflection system.