Abstract:
PROBLEM TO BE SOLVED: To provide an electron source which has the function of plasma generation, which is not deteriorated, and includes a simple structure. SOLUTION: An inner structure material 4 disposed between an inner wall 9 and a collector electrode 3 in a plasma generation chamber 1 can prevent deposition of a conductive material on the inner wall 9 in the plasma formation chamber 1. Accordingly, a high-frequency electric field from a high-frequency antenna 2 is not shielded, and therefore initial plasma of a capacity coupling type can be generated by the high-frequency electric field. Even when the conductive material is deposited on the inner structure material 4 to shield the high-frequency electric field, the deposit is deposited on a side closer to the collector electrode 3 in the inner structure material 4, and therefore the high-frequency electric field from the inner structure material 4 into the plasma generation chamber 1 is shielded, but the high-frequency electric field from the inner wall 9 to the inner structure material 4 is shielded. Because a distance d is set between the inner structure material 4 and the inner wall 9, the initial plasma of the capacity coupling type can be generated in a region between the inner structure material 4 and the inner wall 9 by the high-frequency electric field. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a single-column inductive coupling plasma source that operates in an ion mode for FIB operation or electron mode for SEM operation, and configured to allow a user to make a selection.SOLUTION: Energy dispersion type X-ray spectral analysis can be performed when an X-ray detector is mounted. The user selectively configures ICP so as to prepare a sample in the ion mode or FIB mode and actually moves a switch for selecting the electron mode or SEM mode, and can analyze the sample by using analysis of EDS or other types.
Abstract:
PROBLEM TO BE SOLVED: To provide a high-frequency discharge type plasma generating device which achieves a smaller amount of reduction in PFG current and a longer life.SOLUTION: A plasma generating device has: a plasma generating chamber in which gas is ionized by high frequency discharge to generate plasma; an electron emission hole through which electrons coming from the plasma are emitted to the outside; an antenna provided in the plasma generating chamber for radiating high frequency waves; and an antenna cover composed of an insulator and covering the whole antenna. In the plasma generating device, a plasma electrode having the electron emission hole formed therein is made of a conductive material. The plasma generating device further has a frame cover having protruding portions different in thickness in the region of a cylinder-shape frame with the electrical continuity ensured, inside or both inside and outside the frame. The protruding portions prevent the deposition of the insulator on the surface of the plasma electrode on the side facing the plasma owing to the sputtering by plasma.