Patent Number: 
Section: claims

1. An ion implanting apparatus, comprising:a member comprising a through hole through which an ion beam is passed to form a beam geometry,wherein at least an inner surface of said through hole of said member comprises an unoriented poly-crystalline structure. 2. The ion implanting apparatus according to claim 1, wherein at least said inner surface of said through hole of said member is coated with a thermal spraying film. 3. The ion implanting apparatus according to claim 1, wherein said thermal spraying film comprises silicon. 4. The ion implanting apparatus according to claim 1, wherein said thermal spraying film comprises tungsten. 5. The ion implanting apparatus according to claim 2, wherein said thermal spraying film has a thickness of about 150 μm. 6. The ion implanting apparatus according to claim 2, wherein said thermal spraying film comprises said unoriented poly-crystalline structure. 7. The ion implanting apparatus according to claim 2, wherein said thermal spraying film comprises a porous film. 8. The ion implanting apparatus according to claim 1, wherein at least the inner surface of said through hole of said member is coated with a coating film having an unoriented poly-crystalline structure. 9. The ion implanting apparatus according to claim 1, wherein said member comprises an oriented poly-crystalline structure, andwherein at least the inner surface of said through hole of said member is coated with a coating film having an unoriented poly-crystalline structure. 10. The ion implanting apparatus according to claim 1, wherein said member comprises carbon. 11. An ion implanting apparatus, comprising:a member comprising a through hole through which an ion beam is passed to form a beam geometry,wherein at least an inner surface of said through hole of said member is porous. 12. The ion implanting apparatus according to claim 11, wherein at least the inner surface of said through hole of said member is coated with a porous film. 13. The ion implanting apparatus according to claim 12, wherein said porous film comprises:a surface comprising a plurality of concave portions; andan interior comprising a plurality of pores,wherein at least a portion of said plurality of concave portions connect with at least a portion of said plurality of pores, andwherein at least a portion of said plurality of pores mutually connect. 14. The ion implanting apparatus according to claim 13, wherein said plurality of concave portions and said plurality of pores are not influential in forming said beam geometry, and are formed to have dimensions that are adopted for adsorbing ion species. 15. The ion implanting apparatus according to claim 13, wherein said plurality of concave portions have a thickness less than or equal to 5 μm. 16. The ion implanting apparatus according to claim 12, wherein said porous film comprises a coating film. 17. The ion implanting apparatus according to claim 16, wherein said coating film comprises a thermal spraying film. 18. The ion implanting apparatus according to claim 17, wherein said thermal spraying film comprises silicon. 19. The ion implanting apparatus according to claim 17, wherein said thermal spraying film comprises tungsten. 20. The ion implanting apparatus according to claim 11, wherein at least an inner surface of said through hole of said member comprises an unoriented poly-crystalline structure.