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    • 57. 发明公开
    • Charged particle beam instrument with a specimen pre-evacuation chamber
    • Teilchenstrahlinstrument与预备排气室用于样品转移
    • EP2760042A3
    • 2015-08-26
    • EP14153074.1
    • 2014-01-29
    • Jeol Ltd.
    • Matsushita, Mitsuhide
    • H01J37/18
    • H01J37/18H01J37/185H01J37/20H01J37/28H01J2237/184H01J2237/188H01J2237/204Y10T137/86002
    • A charged particle beam instrument is offered which has a specimen pre-evacuation chamber where damage and scattering of a specimen can be prevented. The charged particle beam instrument (100) includes the specimen chamber (10), the specimen pre-evacuation chamber (20) connected with the specimen chamber (10) via a gate valve (12), an outflow flow rate adjusting valve (70) for adjusting the flow rate of gas exhausted from the specimen pre-evacuation chamber (20), and a controller (82) for controlling the outflow flow rate adjusting valve (70). The controller (82) performs an operation for controlling the adjusting valve (70) to a first degree of opening, an operation for making a decision as to whether the difference between a first pressure in the pre-evacuation chamber (20) measured by the pressure gauge (30) before the adjusting valve (70) is controlled to the first degree of opening and a second pressure in the pre-evacuation chamber (20) measured by the pressure gauge (30) after the adjusting valve (70) has been controlled to the first degree of opening is greater than a first reference value, and an operation for controlling the adjusting valve (70) to a second degree of opening smaller than the first degree of opening if the decision is affirmative to indicate that the difference between the first and second pressures is greater than the first reference value.
    • 60. 发明授权
    • SLIDER BEARING FOR USE WITH AN APPARATUS COMPRISING A VACUUM CHAMBER
    • 轴承有真空腔全面的设备使用
    • EP2033206B1
    • 2011-06-08
    • EP07756002.7
    • 2007-04-26
    • FEI Company
    • PERSOON, Johannes, Antonius, HendricusENGELEN, Andreas, TheodorusLICHTENEGGER, SiegfriedVAN DOOREN, Petrus, Henricus, Joannes
    • H01J37/28
    • H01J37/28H01J37/185H01J37/20H01J2237/166H01J2237/184H01J2237/2006H01J2237/204
    • A slider bearing for use with an apparatus comprising a vacuum chamber (11).The slider bearing comprises: a base plate (20) in contact with the vacuum chamber (11) at one side, said base plate showing a first through-hole (21) in contact with the vacuum chamber (11), a second plate (30), one side of the second plate in contact with the base plate (20), said second plate showing a second through-hole (31), the faces of the base plate and the second plate facing each other being sufficiently smooth to form a non-elastomeric vacuum seal, said base plate (20) and said second plate (30) slidable between a first relative position in which the first through-hole (21) and the second through-hole (31) do not overlap and a second relative position in which the first through-hole and the second through-hole overlap, characterised in that the second plate (30) is a flexible plate, the face of the flexible plate opposite to the base plate is equipped to seal against a cup (50), the cup equipped to hold a sample (1), the first through-hole (21) in the base plate shows a rim facing the flexible plate (30) with a controlled curvature, the curvature of the rim formed such that the vacuum seal between the base plate and the flexible plate forms on a pre-defined contour and that the Hertzian contact pressure is smaller than a pre-defined maximum contact pressure, the pre-determined maximum contact pressure chosen to minimise particle generation. By forming the second plate as a flexible plate the pressure with which the base plate and the second plate are pressed together is better reproducible than when both plates are rigid. By forming the rim with a controlled radius, the particle generation is minimized.