Patent Number: 
Section: claims

1. A method for calibrating operational parameters of a charged particle beam device, comprising:(a) generating a plurality of distinct spots on a specimen, each spot being generated in response to adjusted operational parameters of the charged particle beam device;(b) registering said respective operational parameters. 2. The method according to claim 1, wherein said charged particle beam device being a high current charged particle beam device, and wherein said (a) includes milling the plurality of spots on the specimen. 3. The method according to claim 2, wherein said current being ≧1 ηA. 4. The method according to claim 1, wherein said charged particle beam device is a Focused Ion Beam (FIB) device. 5. The method according to claim 4, wherein said parameters being at least one of spot astigmatism value, spot focus size, wobble value, beam current intensity and spot milling time. 6. The method according to claim 5 wherein said spot astigmatism value can be determined by applying voltage difference to electrodes; said focus size can be determined by applying DC voltage to electrostatic lens; said wobble value can be determined by; said current intensity can be determined by applying input voltage to X/Y motors of an APC of said FIB; milling time can be determined by enable/disable command applied to Beam Blank electrodes. 7. The method according to claim 5, wherein at least one of said parameters is adjusted according to a correction step. 8. The method according to claim 7, wherein the same correction step is applied in all iterations. 9. The method according to claim 7, wherein different correction step is applied in one or more iterations. 10. The method according to claim 7, wherein different correction step is applied in respect of the same parameter. 11. The method according to claim 5, wherein an astigmatism value is adjusted in accordance with the following equation:XNEW=Xp+(Xn−Xc)·Correction stepYNEW=Yp+(Yn−Yc)·Correction stepWhere:XNEW, YNEW represent a new value of the parameterXp, Yp represent a reference value of the parameterXn, Yn signify new a beam locationCorrection step: signifies a correction stepXc, Yc represent a matrix center. 12. The method according to claim 1, further comprising:(c) inspecting the plurality of spots for determining selected spot. 13. The method according to claim 12, wherein said inspection is automatic or semi automatic. 14. The method according to claim 12, wherein said selected spot being an optimal spot. 15. The method according to claim 13, wherein said selected spot being an optimal spot. 16. The method according to claim 12, further comprising: extracting the parameters that correspond to said selected spot, and setting the operational parameters of the device according to the extracted parameters. 17. The method according to claim 1, wherein said charged particle beam device is a Scanning Electron Microscope (SEM). 18. The method according to claim 17, wherein said parameters being at least one of: Gun alignment, Aperture alignment, Astigmatism, Focus, Beam energy, Cup voltage, Wafer Bias and Column voltage. 19. The method according to claim 1, wherein said charged particle beam device is a Transmission Electron Microscope (TEM). 20. The method according to claim 19, wherein said parameters being at least one of: Beam energy Acc, Filament current, Extractor voltage and Suppressor voltage. 21. The method according to claim 1, wherein said charged particle beam device is a Scanning Transmission electron microscope (STEM). 22. A system for calibrating operational parameters of a charged particle beam device, comprising:a) a unit for generating a plurality of distinct spots on a specimen, each spot being generated in response to adjusted operational parameters of the charged particle beam device;b) a unit for registering said respective operational parameters. 23. A computer program product comprising a computer useable medium having computer readable program code embodied therein for calibrating operational parameters of a charged particle beam device, the computer program product comprising:a) computer readable program code for causing the computer to facilitate generating a plurality of distinct spots on a specimen, each spot being generated in response to adjusted operational parameters of the charged particle beam device;b) computer readable program code for causing the computer to register said respective operational parameters.