Patent ID: 6730907
Filing Date: 2004-05-04
Classification: H01J

Abstract:
A charged particle device (1) comprising:a particle source (2) for providing a charged particle beam (4); an objective lens (10) for focusing the particle beam onto a specimen (8), said objective lens (10) having an optical axis (6); a particle mirror (14) located on the optical axis (6) of the objective lens (10), said particle mirror (14) having a front surface (27), a back surface (28), a drift region (26) reaching from the back surface (28) to the front surface (27) for letting the charged particle beam (4) pass from the back surface (28) to the front surface (27), said drift region (26) being positioned away from the optical axis (6), and a deflecting region (25) located on the front surface (27) for deflecting charged particles coming from the specimen (8) toward a detector (16).