Holder device and semiconductor producing apparatus having same
First Claim
Patent Images
1. A holder device for attractively holding an object so as to handle or fix the same, comprising:
- a hand body having a holder surface portion for attractively holding the object, at least the holder surface portion of said hand body being made of a dielectric having a resistivity of not more than 1010 Ω
cm;
an electrode provided on that surface of said hand body facing away from said holder surface portion; and
a voltage generating device for producing a potential difference between said electrode and the object.
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Accused Products
Abstract
A device for holding an object by electrostatic force includes a body made of a dielectric of a low resistivity, such as SiC, and an electrode provided on that surface of the device body facing away from a holder surface, so that a potential difference is produced between the object and the holder surface. A change-over switch for grounding the device body to an earth potential of an ambient environment is provided, so that the dielectric can be rapidly brought into a potential equal to the earth potential.
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Citations
23 Claims
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1. A holder device for attractively holding an object so as to handle or fix the same, comprising:
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a hand body having a holder surface portion for attractively holding the object, at least the holder surface portion of said hand body being made of a dielectric having a resistivity of not more than 1010 Ω
cm;an electrode provided on that surface of said hand body facing away from said holder surface portion; and a voltage generating device for producing a potential difference between said electrode and the object. - View Dependent Claims (2, 3, 4)
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5. A holder device for attractively holding an object, comprising:
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a hand body having a holder surface portion for attractively holding the object, at least the holder surface portion of said hand body being made of a dielectric having a resistivity of not more than 1010 Ω
cm;an electrode provided on that surface of said hand body facing away from said holder surface portion; a voltage generating device for producing a potential difference between said electrode and the object; an electrically-conductive portion for maintaining said object at an earth potential; and a change-over switch for electrically connecting said electrode to the earth when the object is to be released from said holder surface portion. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A holder device for attractively holding an object, comprising;
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a hand body having a holder surface portion for attractively holding the object, at least the holder surface portion of said hand body being made of a dielectric having a resistivity of not more than 1010 Ω
cm;first and second electrodes provided on that surface of said hand body facing away from said holder surface portion; a first voltage generating device for producing a potential difference between said first and second electrodes; a second voltage generating device for producing a bias voltage at one of said electrodes having a lower potential; and means for adjusting the potential of said second voltage generating means so as to bring the potential of the object, held on said holder surface portion, to substantially 0 volt. - View Dependent Claims (19)
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20. A semiconductor producing apparatus comprising:
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a loader chamber for accommodating a cassette case receiving a semiconductor wafer; processing chambers for subjecting said semiconductor wafer to treatments including a heat treatment; an unloader chamber for accommodating said semiconductor wafer subjected to said treatments; a handling device for attractively holding said semiconductor wafer and for moving said semiconductor wafer; a vertically-movable shaft moved upward and downward by said handling device; a swingable arm connected to said vertically-movable shaft via a rotatable shaft; and a holder device mounted on a distal end of said arm, said holder device comprising (i) a holder portion having a holder surface portion for attractively holding said semiconductor waver, at least the holder surface portion of said holder portion being made of a dielectric having a resistivity of not more than 1010 cm, (ii) an electrode provided on that surface of said holder portion facing away from said holder surface portion, and (iii) a voltage generating device for producing a potential difference between said electrode and said semiconductor wafer.
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21. A semiconductor producing apparatus comprising a microwave radiating device;
- and a holder device for attractively holding a wafer in a vacuum chamber, whereby a plasma etching is effected by radiating a microwave from said microwave radiating device;
said holder device comprising (i) a hand body having a holder surface for attractively holding said wafer, the holder surface portion of said hand body being made of SiC, (ii) an electrode provided on that surface of said hand body facing away from said holder surface portion, and (iii) a voltage generating device for producing a potential difference between said electrode and said wafer.
- and a holder device for attractively holding a wafer in a vacuum chamber, whereby a plasma etching is effected by radiating a microwave from said microwave radiating device;
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22. A semiconductor producing apparatus comprising an electron gun column;
- and a holder device mounted on the XY stage so as to attractively hold a wafer, whereby a circuit pattern is formed on said wafer by an electron beam from said electron gun column;
said holder device comprising (i) a holder portion having a holder surface portion for attractively holding said wafer, at least the holder surface portion of said holder portion being made of a dielectric having a resistivity of not more than 1010 Ω
cm, (ii) an electrode provided on that surface of said holder portion facing away from said holder surface portion, and (iii) a voltage generating device for producing a potential difference between said electrode and said wafer. - View Dependent Claims (23)
- and a holder device mounted on the XY stage so as to attractively hold a wafer, whereby a circuit pattern is formed on said wafer by an electron beam from said electron gun column;
Specification