Patent ID: 9287083
Filing Date: 2016-03-15
CPC Classification: H01J

Claim Text:
1. An image acquiring method including the steps of: providing a charged particle source and generating a primary charged particle beam using the charged particle source; utilizing a plurality of convergent lenses for converging the primary charged particle beam which is emitted from the charged particle source along an optical axis of the charged particle beam device; providing a scan coil for scanning the primary charged particle beam on a sample; using an objective lens for converging the primary charged particle beam and for irradiating the primary charged particle beam on the sample; providing a sample table for receiving and supporting the sample; arranging a deflector above the objective lens and using the deflector for tilting the primary charged particle beam, the charged particle beam device being usable for acquiring a stereo pair image of the sample by irradiating on the sample; tilting the primary charged particle beam by using a swing-back action of the objective lens, the deflector moving a virtual crossover of the primary charged particle beam to a position out of the optical axis when tilting the primary charged particle beam, locating an aligner between the objective lens and the deflector with the aligner having a beam tilt field-of-view compensation function for compensating a tilt angle (ω providing a tilting mechanism and using the tilting mechanism for tilting the sample on the sample table; utilizing a tilted focus compensation function for compensating a focus of the objective lens and simultaneously compensating the tilt angle (ω adapting the charged particle beam device for acquiring a stereo pair image of the sample tilted by the tilting mechanism; and increasing a first signal for the aligner, and decreasing a second signal for the objective lens as a function of the advancing of a deflection signal for the scan coil.