基本信息

• 发明名称： 【发明专利】 Improvements in or relating to electron microscopes
• 申请日： 1970-08-16
• 申请号/专利号： GB3369363
• 专利权人： 无
• 申请人： PHILIPS ELECTRONIC ASSOCIATED
• 分类号： H01J37/20
• 发明人/设计人： 无
• 公开日/公告日： 1970.08.16
• 优先权号： H01J37/20
• 代理机构：
• 代理人：
• PCT申请号： 无
• PCT申请日期： 无
• PCT进入国家阶段日： 无
• 生物宝藏信息： 无
• 审查员： 无

摘要：981,447. Electron microscopes; electrostatic holding devices. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Aug. 26, 1963 [Aug. 29, 1962], No. 33693/63. Headings H1D and H1P. An electron microscope is provided with an object stage in the form of a heat apertured disc 6 within an opening in which the object 8 is arranged and by means of which the object is movable in any lateral direction, together with at least one body 19 of semi-conductor material connected to the object stage 6 and arranged to contact a stationary part 11 of the microscope, the arrangement being such that, when a voltage is set up between the stationary part 11 and a conductive layer 22 on that surface of the body 19 remote from the part 11, electrostatic forces between the body 19 and the part 11 clamp the object stage 6 in such a manner as to prevent axial movement thereof. Suitable semi-conductor materials are slate, marble, agate and certain ceramic synthetic materials having a resistivity of approximately 1010 ohm-cm. In the embodiment shown an annular block 19 of agate provided with a vapour-deposited layer 22 of silver is rigidly connected in an annular groove 20 of the disc 6 with the interposition of a coating 21 of insulating material. A battery 27 and switch 28 are connected between the conductive layer 22 and the stationary part 11 by way of a lead 23 and the wall 13 of the microscope housing. Specification 824,903 is referred to.

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