Positioning device for scanning probe microscopes
First Claim
1. A piezoelectric positioning device for controlling at least a two dimensional horizontal movement between a tip and a sample surface in a scanning probe microscope, including,a thin walled cylindrical shaped member formed of piezoelectric material having inner and outer surfaces and having a first fixed end and a second opposite movable end,a tip member and a sample member having a sample surface and with the tip member and sample member positioned relative to each other to have the tip member located adjacent to the sample surface and with one of the tip member and sample member mounted on the movable end of the cylindrical shaped member,a plurality of substantially rectangular shaped members positioned around one of the surfaces of the cylindrical shaped member to form opposite pairs of electrodes to control the two dimensional horizontal movement between the tip member and sample surface in accordance with voltages applied to the pairs of electrodes,wherein each rectangular shaped member is split into at least two electrode portions and with particular polarity voltages applied to the individual electrode portions to substantially eliminate tilting of the movable end of the cylindrical shaped member during the two dimensional movements, andwherein the cylindrical shaped member is formed of at least two pieces of piezoelectric material polarized in opposite directions and with the individual electrode portions in each split electrode located on a different one of the pieces of piezoelectric material and with the same polarity voltage applied to the individual electrode portions in each split electrode.
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Accused Products
Abstract
A two dimensional piezoelectric positioning device of the type including a thin walled cylindrical shaped member of piezoelectric material. A plurality of substantially rectangular shaped members are positioned around one surface of the cylindrical shaped member to form opposite pairs of electrodes to control the two dimensional movement in accordance with voltages applied to the pairs of electrodes. Each rectangular shaped member is split into at least two electrode portions and with particular polarity voltages applied to the individual electrode portions to maintain a substantially constant length for the cylindrical shaped member during the two dimensional movement.
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Citations
28 Claims
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1. A piezoelectric positioning device for controlling at least a two dimensional horizontal movement between a tip and a sample surface in a scanning probe microscope, including,
a thin walled cylindrical shaped member formed of piezoelectric material having inner and outer surfaces and having a first fixed end and a second opposite movable end, a tip member and a sample member having a sample surface and with the tip member and sample member positioned relative to each other to have the tip member located adjacent to the sample surface and with one of the tip member and sample member mounted on the movable end of the cylindrical shaped member, a plurality of substantially rectangular shaped members positioned around one of the surfaces of the cylindrical shaped member to form opposite pairs of electrodes to control the two dimensional horizontal movement between the tip member and sample surface in accordance with voltages applied to the pairs of electrodes, wherein each rectangular shaped member is split into at least two electrode portions and with particular polarity voltages applied to the individual electrode portions to substantially eliminate tilting of the movable end of the cylindrical shaped member during the two dimensional movements, and wherein the cylindrical shaped member is formed of at least two pieces of piezoelectric material polarized in opposite directions and with the individual electrode portions in each split electrode located on a different one of the pieces of piezoelectric material and with the same polarity voltage applied to the individual electrode portions in each split electrode.
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9. In an at least two dimensional piezoelectric positioning device of the type including a thin walled cylindrical shaped member of piezoelectric material having a plurality of substantially rectangular shaped members positioned around one surface of the cylindrical shaped member to form opposite pairs of electrodes to control the two dimensional movement in accordance with voltages applied to the pairs of electrodes, an improvement including
each rectangular shaped member split into at least two electrode portions and with particular polarity voltages applied to the individual electrode portions to maintain a substantially constant length for the cylindrical shaped member during the two dimensional movement, and wherein the cylindrical shaped member is formed of at least two pieces of piezoelectric material polarized in opposite directions and with the individual electrode portions in each split electrode located on a different one of the pieces of piezoelectric material and with the same polarity voltage applied to the individual electrode portions in each split electrode.
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19. A piezoelectric positioning device for controlling at least a two dimensional horizontal movement between a tip and a sample surface in a scanning probe microscope, including,
a thin walled cylindrical shaped member formed of piezoelectric material having inner and outer surfaces and having a first fixed end and a second opposite movable end, a tip member and a sample member having a sample surface and with the tip member and sample member positioned relative to each other to ave the tip member located adjacent to the sample surface and with one of the tip member and sample member mounted on the movable end of the cylindrical shaped member, a plurality of substantially rectangular shaped members positioned around one of the surfaces of the cylindrical shaped member to form opposite pairs of electrodes to control the two dimensional horizontal movement between the tip member and sample surface in accordance with voltages applied to the pairs of electrodes, wherein each rectangular shaped member is split into at least two electrode portions and with particular polarity voltages applied to the individual electrode portions to substantially eliminate tilting of the movable end of the cylindrical shaped member during the two dimensional movements, a unitary member positioned around the one surface of the cylindrical shaped member to form a unitary electrode to control a vertical movement between the tip member and sample surface in accordance with voltage applied to the unitary electrode, and wherein the unitary electrode is located in the middle of the cylindrical shaped member between the individual portions of each split electrode.
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24. In an at least two dimensional piezoelectric positioning device of the type including a thin walled cylindrical shaped member of piezoelectric material having a plurality of substantially rectangular shaped members positioned around one surface of the cylindrical shaped member to form opposite pairs of electrodes to control the two dimensional movement in accordance with voltages applied to the pairs of electrodes, an improvement including
each rectangular shaped member split into at least two electrode portions and with particular polarity voltages applied to the individual electrode portions to maintain a substantially constant length for the cylindrical shaped member during the two dimensional movement, a unitary member positioned around both surfaces of the cylindrical shaped member to form a unitary electrode to control a vertical movement of the sample member in accordance with voltage applied to the unitary electrode, and wherein the unitary electrode is located in the middle of the cylindrical shaped member between the individual portions of each split electrode.
Specification