JP2010103812A - Switching element and slide transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switching element which causes a heavy current to be flowed although being small-sized. <P>SOLUTION: In a liquid 3 in which particles are dispersed, a pair of electrodes 41, 42 are disposed while facing to each other at a predetermined facing interval D1. By applying a high frequency voltage between the pair of electrodes 41, 42, dielectrophoresis of particles is performed in the liquid 3 to bridge between the electrodes 41, 42 to achieve a conduction state (Fig.(b)). By stopping applying the high frequency voltage between the pair of electrodes 41, 42, dielectrophoresis of particles is stopped, and bridging between these electrodes 41, 42 is destroyed to cancel the conduction state (Fig.(a)). Thus, ON/OFF of a switch is changed over in accordance with the presence or absence of applying the high frequency voltage to the electrodes 41, 42. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a switching element that constitutes an electrical component such as a slide transformer and a slide transformer including the switching element.

Conventionally, there is a case where a slide transformer (for example, a slidac (registered trademark) manufactured by Toshiba Corporation) is used to increase the voltage when the voltage drops. This slide transformer is configured such that a transformation ratio can be continuously changed by mechanically sliding a secondary contact (see, for example, Patent Document 1).
JP 2004-48850 A (paragraph [0012])

  However, since such a slide transformer has a structure in which the contact is slid and switched at the time of voltage transformation, there is a problem that it is necessary to increase the size of the contact and other parts in order to pass a large current. .

  In view of such circumstances, an object of the present invention is to provide a switching element capable of flowing a large current even if the size is small.

  In the first switching element (1) according to the present invention, a pair of electrodes (41, 42) are arranged in a liquid (3) in which particles are dispersed so as to face each other with a predetermined facing distance (D1). By applying a high-frequency voltage between the electrodes, the particles are dielectrophoresed in the liquid, and the electrodes are cross-linked to be in a conductive state, and the high-frequency voltage is applied between the pair of electrodes. The switching element is configured to stop the dielectrophoresis of the particles by stopping and to break the bridge between these electrodes to release the conductive state.

  The second switching element (1) according to the present invention arranges a plurality of first electrodes (51) at a predetermined arrangement interval (D2) in the liquid (3) in which particles are dispersed, One second electrode (52) is movably disposed so as to face one electrode at a predetermined facing distance (D1), and the second electrode is moved to an arbitrary position, whereby the plurality of first electrodes Among the electrodes, the first electrode facing the second electrode is subjected to dielectrophoresis of the particles in the liquid by applying a high frequency voltage between the first electrode and the second electrode. Dielectric migration of the particles by bridging between the first electrode and the second electrode to make a conductive state, and by stopping application of a high-frequency voltage between the first electrode and the second electrode Between the first electrode and the second electrode Characterized in that the switching element is configured to release the conductive state by collapsing the bridge.

  The third switching element (1) according to the present invention arranges a plurality of first electrodes (51) at a predetermined arrangement interval (D2) in the liquid (3) in which particles are dispersed, A plurality of second electrodes (52) are arranged to face one electrode at a predetermined facing distance (D1), and any one of the plurality of first electrodes and the plurality of second electrodes is opposed to each other. And the second electrode, by applying a high frequency voltage between the first electrode and the second electrode, the particles are dielectrophoresed in the liquid, and the first electrode and the second electrode In addition to bridging between the first electrode and the second electrode, by stopping the application of the high-frequency voltage between the first electrode and the second electrode, the dielectrophoresis of the particles is stopped, Breaks the bridge between the second electrode and releases the conductive state Characterized in that the switching element is configured urchin.

  The slide transformer according to the present invention is a slide transformer including the switching element (1).

  Here, in order to explain the present invention in an easy-to-understand manner, the description has been made in association with the reference numerals of the drawings representing the embodiments. However, it goes without saying that the present invention is not limited to the embodiments.

  According to the present invention, since the switch can be switched ON / OFF depending on whether or not a high-frequency voltage is applied to the electrode, a switching element capable of flowing a large current even when the size is small can be provided.

Embodiments of the present invention will be described below.
Embodiment 1 of the Invention

  FIG. 1 is a diagram according to Embodiment 1 of the present invention.

  First, the configuration will be described.

  The switching element 1 according to the first embodiment includes a hexahedral sealed container 2 as shown in FIG. The hermetically sealed container 2 is filled with an insulating liquid 3 having a predetermined viscosity, and the liquid 3 contains a plurality of carbon nanotubes (hereinafter referred to as “CNTs”) 9 as fibrous particles. Are distributed. A pair of electrodes 41 and 42 are disposed on the lower surface 2b and the upper surface 2a of the sealed container 2 so as to be opposed to each other with a predetermined facing distance D1 (for example, D1 = 100 μm) in the form of being immersed in the liquid 3. Has been. A lead wire 6 is connected to each of these electrodes 41 and 42 so as to protrude outside the sealed container 2.

  Insulating liquid 3 includes (meth) acrylic resin, polyurethane, thiourethane, acrylamide, fluororesin, polyimide, polyacetal, polyester, phenol resin, urea resin, melamine resin, furan resin, alkyd resin, diallyl phthalate. Those having relatively low viscosity such as resin, epoxy resin, oxetane resin and silicon resin are desirable. A combination of these resins can also be used as the liquid 3.

  Next, the operation will be described.

  Since the switching element 1 has the above-described configuration, when the switching element 1 is turned on, a high frequency voltage is applied between the pair of electrodes 41 and 42 via the respective lead wires 6. Then, a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the electrodes 41 and 42 as shown in FIG. As a result, the electrodes 41 and 42 are electrically connected to each other through the CNTs 9 and the switching element 1 is turned on.

  On the contrary, when the switching element 1 is turned off, the application of the high frequency voltage between the pair of electrodes 41 and 42 is stopped. Then, the CNTs 9 stop the dielectrophoresis in the liquid 3, and the bridge between the electrodes 41 and 42 is broken as shown in FIG. As a result, the electrodes 41 and 42 that have been conducted until then are divided, and the switching element 1 is turned OFF.

  As described above, in the switching element 1, the switch can be turned on / off depending on whether or not the high-frequency voltage is applied to the pair of electrodes 41 and 42. Therefore, even if the size of the switching element 1 is small, a large current (a current up to 1,000 times that of the copper wire) can flow between the electrodes 41 and 42. In addition, since the liquid 3 has an insulating property, discharge when a large current is passed between the electrodes 41 and 42 can be suppressed.

In addition, the switching element 1 is used semipermanently because the contact point is not fused, worn, or deteriorated due to switching unlike the conventional product that switches by sliding the contact point mechanically. Can do.
[Embodiment 2 of the Invention]

  2 and 3 are diagrams according to Embodiment 2 of the present invention.

  First, the configuration will be described.

  As shown in FIG. 2, the switching element 1 according to the second embodiment includes a hexahedron-shaped sealed container 2, which includes a rectangular dish-shaped tray 7 and an upper side of the tray 7. And a flat lid 8 placed so as to close the opening. As shown in FIG. 3A, the sealed container 2 is filled with a liquid 3 having a predetermined viscosity having insulating properties, and a large number of CNTs 9 are dispersed in the liquid 3. Here, on the lower surface 2b of the sealed container 2 (the bottom portion 7a of the tray 7), the three first electrodes 51 (51A, 51B, 51C) are all immersed in the liquid 3 in a predetermined arrangement interval D2 ( For example, it is arranged and fixed at D2 = 1 mm). In addition, on the upper surface 2a (lid 8) of the sealed container 2, one second electrode 52 is immersed in the liquid 3, and the three first electrodes 51A, 51B, 51C are separated from each other by a predetermined facing distance D1 (for example, , D1 = 50 μm) so as to be movable in the directions of arrows A and B. Note that the facing interval D1 is set to be shorter than the arrangement interval D2. Furthermore, the lead wire 6 is connected to each of the first electrode 51 and the second electrode 52 so as to protrude to the outside of the sealed container 2.

  As the liquid 3 having insulating properties, the same liquid as in the first embodiment described above can be used.

  Next, the operation will be described.

  Since the switching element 1 has the above-described configuration, when the first electrode 51A on the left side of the three first electrodes 51 and the second electrode 52 are brought into conduction to turn on the switching element 1, FIG. ), The second electrode 52 is positioned between the first electrode 51 and the second electrode 52 in a state where the second electrode 52 is positioned at the first facing position (position facing the left first electrode 51A). A high frequency voltage is applied through the lead wire 6. Then, a large number of CNTs 9 in the hermetic container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the first electrode 51A and the second electrode 52 as shown in FIG. As a result, the first electrode 51A and the second electrode 52 are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  In addition, when the switching element 1 is turned on by connecting the central first electrode 51 </ b> B and the second electrode 52 among the three first electrodes 51, a high frequency is generated between each first electrode 51 and the second electrode 52. With the voltage applied, the second electrode 52 is moved in the direction of arrow B as shown in FIG. Then, since the distance between the first electrode 51A on the left side and the second electrode 52 becomes longer, the bridge between the first electrode 51A and the second electrode 52 collapses. Thereafter, when the second electrode 52 reaches the second facing position (position facing the central first electrode 51B), a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3, and FIG. As shown in FIG. 2, the first electrode 51B and the second electrode 52 are bridged. As a result, the first electrode 51B and the second electrode 52 are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  Further, when the switching element 1 is turned on by electrically connecting the right first electrode 51 </ b> C and the second electrode 52 among the three first electrodes 51, a high frequency is generated between each first electrode 51 and the second electrode 52. While the voltage is applied, the second electrode 52 is further moved in the arrow B direction. Then, since the distance between the central first electrode 51B and the second electrode 52 becomes longer, the bridge between the first electrode 51B and the second electrode 52 collapses. Thereafter, when the second electrode 52 reaches the third facing position (position facing the first electrode 51C on the right side), a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3, and FIG. As shown in FIG. 3, the first electrode 51C and the second electrode 52 are bridged. As a result, the first electrode 51C and the second electrode 52 are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  On the other hand, when the switching element 1 is turned off, the first electrode 51 and the second electrode 52 are connected to each other regardless of whether the second electrode 52 is positioned at the first facing position, the second facing position, or the third facing position. The application of the high frequency voltage between the two electrodes 52 is stopped. Then, the CNTs 9 stop dielectrophoresis in the liquid 3, and the bridge between the first electrode 51 and the second electrode 52 is broken. As a result, the first electrode 51 and the second electrode 52 that have been conducted so far are divided, and the switching element 1 is turned off.

  As described above, in the switching element 1, the switch can be turned on / off depending on whether or not the high-frequency voltage is applied to the first electrode 51 and the second electrode 52. Therefore, even if the size of the switching element 1 is small, a large current (current up to 1,000 times that of the copper wire) can flow between the first electrode 51 and the second electrode 52. In addition, since the liquid 3 has an insulating property, it is possible to suppress discharge when a large current is passed between the first electrode 51 and the second electrode 52.

  Furthermore, in this switching element 1, since the facing distance D1 is shorter than the arrangement distance D2, erroneous conduction between the first electrode 51 and the second electrode 52 can be avoided. That is, generally, the strength of the electric field (electric field) when a high frequency voltage is applied between the first electrode 51 and the second electrode 52 increases as the distance between the first electrode 51 and the second electrode 52 decreases. Therefore, the CNTs 9 are bridged between the second electrode 52 and the closest first electrode 51 among the three first electrodes 51. However, if the facing distance D1 is approximately equal to or longer than the arrangement interval D2, the second electrode 52 causes factors other than the distance between the first electrode 51 and the second electrode 52 (for example, the viscosity of the liquid 3). It is conceivable that the CNTs 9 are bridged with the first electrode 51 that is the second most distant among the three first electrodes 51 due to a deviation or the like, thereby causing erroneous conduction. On the other hand, if the facing distance D1 is shorter than the arrangement distance D2, the distance between the first electrode 51 and the second electrode 52 becomes dominant over other factors, and therefore the desired first electrode 51 and the second electrode 52 It is possible to correctly connect the two electrodes 52 and avoid erroneous conduction.

In addition, the switching element 1 is used semipermanently because the contact point is not fused, worn, or deteriorated due to switching unlike the conventional product that switches by sliding the contact point mechanically. Can do.
Embodiment 3 of the Invention

  4 and 5 are diagrams according to Embodiment 3 of the present invention.

  First, the configuration will be described.

  As shown in FIG. 4, the switching element 1 according to the third embodiment has a donut-shaped sealed container 2. As shown in FIG. 5, the sealed container 2 is filled with a liquid 3 having a predetermined viscosity having insulating properties, and a large number of CNTs 9 are dispersed in the liquid 3. Here, the four first electrodes 51 (51A, 51B, 51C, 51D) are all equiangularly spaced from each other in the form of being immersed in the liquid 3 (that is, 90 °) inside the outer peripheral surface of the sealed container 2. Are arranged at intervals). Further, as shown in FIG. 4, a cylindrical shaft member 10 is fitted at the center of the sealed container 2 so as to be rotatable in the direction of the arrow M around the axis CT1. On the peripheral surface, one second electrode 52 is disposed so as to be immersed in the liquid 3.

  As the liquid 3 having insulating properties, the same liquid as in the first embodiment described above can be used.

  Next, the operation will be described.

  Since the switching element 1 has the above-described configuration, the second electrode 52 is electrically connected to the arbitrary first electrode 51 by appropriately rotating the shaft member 10 in the direction of the arrow M about the axis CT1. 1 can be turned on.

  For example, when the switching element 1 is turned on by making the first electrode 51A on the left side of FIG. 4 and the second electrode 52 of the four first electrodes 51 conductive, the shaft member 10 is turned on as shown in FIG. Is rotated in the direction of arrow M around the axis CT1, and the second electrode 52 is positioned at a position facing the first electrode 51A. In this state, a high frequency voltage is applied between the first electrode 51A and the second electrode 52. Then, a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the first electrode 51A and the second electrode 52. As a result, the first electrode 51A and the second electrode 52 are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  When the switching element 1 is turned on by connecting the first electrode 51C on the right side of FIG. 4 and the second electrode 52 among the four first electrodes 51, the first electrode 51A and the second electrode 52 on the left side of FIG. The application of the high-frequency voltage between is stopped. Then, the CNTs 9 stop dielectrophoresis in the liquid 3, and the bridge between the first electrode 51A and the second electrode 52 is broken. Thereafter, as shown in FIG. 5B, the shaft member 10 is rotated by 180 ° in the direction of the arrow M around the axis CT1, and the second electrode 52 is positioned at a position facing the first electrode 51C. In this state, a high frequency voltage is applied between the first electrode 51 </ b> C and the second electrode 52. Then, a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the first electrode 51C and the second electrode 52. As a result, the first electrode 51C and the second electrode 52 are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  On the contrary, when the switching element 1 is turned off, the application of the high frequency voltage between the first electrode 51 and the second electrode 52 is stopped. Then, the CNTs 9 stop dielectrophoresis in the liquid 3, and the bridge between the first electrode 51 and the second electrode 52 is broken. As a result, the first electrode 51 and the second electrode 52 that have been conducted so far are divided, and the switching element 1 is turned off.

  As described above, in the switching element 1, the switch can be turned on / off depending on whether or not the high-frequency voltage is applied to the first electrode 51 and the second electrode 52. Therefore, even if the size of the switching element 1 is small, a large current (current up to 1,000 times that of the copper wire) can flow between the first electrode 51 and the second electrode 52. In addition, since the liquid 3 has an insulating property, it is possible to suppress discharge when a large current is passed between the first electrode 51 and the second electrode 52.

  Furthermore, in this switching element 1, since it has the structure which switches the 1st electrode 51 connected with the 2nd electrode 52 by rotating the cylindrical shaft member 10 with respect to the donut-shaped airtight container 2, When the conduction is switched, the sealed state of the sealed container 2 can be easily maintained. Therefore, it is possible to improve the practicality as the switching element 1.

In addition, the switching element 1 is used semipermanently because the contact point is not fused, worn, or deteriorated due to switching unlike the conventional product that switches by sliding the contact point mechanically. Can do.
[Embodiment 4 of the Invention]

  FIG. 6 is a diagram according to Embodiment 4 of the present invention.

  First, the configuration will be described.

  As shown in FIG. 6A, the switching element 1 according to the fourth embodiment has a hexahedral sealed container 2. The sealed container 2 is filled with a liquid 3 having a predetermined viscosity having insulating properties, and a large number of CNTs 9 are dispersed in the liquid 3. Here, three first electrodes 51 (51A, 51B, 51C) are all immersed in the liquid 3 on the lower surface 2b of the sealed container 2 at a predetermined arrangement interval D2 (for example, D2 = 2 mm). Arranged and fixed. In addition, three second electrodes 52 (52A, 52B, 52C) are all immersed in the liquid 3 on the upper surface 2a of the sealed container 2 so as to face the three first electrodes 51A, 51B, 51C. They are arranged facing each other with a distance D1 (for example, D1 = 100 μm). Note that the facing interval D1 is set to be shorter than the arrangement interval D2. Furthermore, the lead wire 6 is connected to each first electrode 51 and each second electrode 52 so as to protrude outside the sealed container 2.

  As the liquid 3 having insulating properties, the same liquid as in the first embodiment described above can be used.

  Next, the operation will be described.

  Since the switching element 1 has the above-described configuration, when the left first electrode 51A and the left second electrode 52A are electrically connected to turn on the switching element 1, the first electrode 51A and the second electrode 52A A high frequency voltage is applied via each lead wire 6 between the two. Then, a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the first electrode 51A and the second electrode 52A as shown in FIG. 6B. As a result, the first electrode 51A and the second electrode 52A are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  Further, when the switching device 1 is turned on by connecting the central first electrode 51B and the central second electrode 52B, first, a high frequency voltage is applied between the first electrode 51A and the second electrode 52A. Stop. Then, the CNTs 9 stops dielectrophoresis in the liquid 3, and the bridge between the first electrode 51A and the second electrode 52A is broken as shown in FIG. 6 (a). Thereafter, a high frequency voltage is applied between each of the first electrode 51B and the second electrode 52B via each lead wire 6. Then, a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the first electrode 51B and the second electrode 52B as shown in FIG. 6C. As a result, the first electrode 51B and the second electrode 52B are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  Further, when the switching element 1 is turned on by connecting the right first electrode 51C and the right second electrode 52C, first, a high frequency voltage is applied between the first electrode 51B and the second electrode 52B. Stop. Then, the CNTs 9 stops dielectrophoresis in the liquid 3, and the bridge between the first electrode 51A and the second electrode 52A is broken as shown in FIG. 6 (a). Thereafter, a high frequency voltage is applied between the first electrode 51C and the second electrode 52C via the respective lead wires 6. Then, a large number of CNTs 9 in the sealed container 2 undergoes dielectrophoresis in the liquid 3 and bridges between the first electrode 51C and the second electrode 52C as shown in FIG. 6 (d). As a result, the first electrode 51C and the second electrode 52C are electrically connected to each other through the CNTs 9, and the switching element 1 is turned on.

  On the contrary, when the switching element 1 is turned off, the application of the high-frequency voltage between each first electrode 51 and each second electrode 52 is stopped. Then, the CNTs 9 stop dielectrophoresis in the liquid 3, and the bridge between the first electrode 51 and the second electrode 52 is broken. As a result, the first electrode 51 and the second electrode 52 that have been conducted so far are divided, and the switching element 1 is turned off.

  As described above, in the switching element 1, the switch can be turned on / off depending on whether or not the high-frequency voltage is applied to the first electrode 51 and the second electrode 52. Therefore, even if the size of the switching element 1 is small, a large current (current up to 1,000 times that of the copper wire) can flow between the first electrode 51 and the second electrode 52. In addition, since the liquid 3 has an insulating property, it is possible to suppress discharge when a large current is passed between the first electrode 51 and the second electrode 52.

  Further, in this switching element 1, since the facing interval D1 is shorter than the arrangement interval D2, as in the second embodiment described above, erroneous conduction between the first electrode 51 and the second electrode 52 can be avoided.

In addition, the switching element 1 is used semipermanently because the contact point is not fused, worn, or deteriorated due to switching unlike the conventional product that switches by sliding the contact point mechanically. Can do.
[Other Embodiments of the Invention]

  In Embodiments 1 to 4 described above, the switching element 1 in which the CNTs 9 is dispersed in the liquid 3 has been described. However, the surface of the CNTs 9 may be subjected to a surface treatment such as chemical modification, or the surfactant may be applied to the liquid 3. The dispersibility of the CNTs 9 may be improved by dissolving the (surfactant) to reduce the surface tension of the liquid 3.

  In the first to fourth embodiments described above, the switching element 1 in which the CNTs 9 is dispersed in the liquid 3 has been described. However, by setting the viscosity of the liquid 3 and adjusting the ease of migration of the CNTs 9 as appropriate. Alternatively, the response speed of the switching element 1 can be optimized according to the application by appropriately adjusting the length of the CNTs 9. Thereby, the versatility of the switching element 1 can be improved.

  Furthermore, in Embodiments 1 to 4 described above, the case where CNTs 9 is dispersed in the liquid 3 has been described. However, fibrous particles other than CNTs 9 (for example, fibrous metal filler, carbon fiber, or fibrous particles obtained by coating these with a conductive substance) can be substituted or used in combination. Here, the fibrous particles mean those having a ratio of the major axis to the minor axis (aspect ratio) of 10 or more. Further, particles other than fibrous particles (for example, spherical particles, conductive carbon black, spherical metal filler, or particles coated with a conductive material) can be substituted or used in combination.

  In the second and third embodiments, the switching element 1 including three and four first electrodes 51 has been described. However, if the number of the first electrodes 51 is plural (two or more). It doesn't matter how many.

  In the above-described fourth embodiment, the switching element 1 including the three first electrodes 51 and the three second electrodes 52 has been described. However, the number of the first electrodes 51 and the second electrodes 52 may be a plurality (2 As long as it is more than one).

  Embodiment 1 of the present invention will be described below.

  25 mg of single-walled carbon nanotubes (hereinafter referred to as “SWCNTs”) and 3M nitric acid were mixed, and this was ultrasonically stirred for 20 minutes. Next, after the obtained mixture was diluted with a large amount of pure water, it was heated to 110 ° C. to evaporate the water and dried. By this treatment, SWCNTs whose surface was chemically modified with a carboxyl group were obtained.

  The SWCNTs after the chemical modification treatment were mixed in an acrylic resin so as to have a concentration of 0.1% by mass, and ultrasonically stirred for 1 hour. Next, centrifugation was performed at 10,000 rpm for 30 minutes to obtain a raw material mixture in which SWCNTs were dispersed in the resin.

  This raw material mixture was filled in a sealed container 2 of the switching element 1 as shown in FIG. The facing interval D1 was 50 μm, and the arrangement interval D2 was 1 mm.

  A high frequency alternating current of 100 kHz and 20 Vpp was applied between the first electrode 51 and the second electrode 52 for 30 minutes. Then, SWCNTs were bridged between the first electrode 51A and the second electrode 52 facing each other.

  Next, the 2nd electrode 52 was moved to the arrow B direction, and was positioned in the 2nd opposing position (position facing the 1st electrode 51B of the center). Then, the previously cross-linked SWCNTs collapsed, and new SWCNTs were cross-linked between the first electrode 51B and the second electrode 52 facing each other.

It is a schematic diagram of the switching element concerning Embodiment 1 of the present invention, (a) is a figure showing an OFF state, and (b) is a figure showing an ON state. It is a perspective view of the switching element which concerns on Embodiment 2 of this invention. It is a schematic diagram of the switching element according to the second embodiment, (a) is a diagram showing the OFF state, (b) is a state diagram in which the left first electrode and the second electrode are conducted, (c) is a diagram A state diagram in which the second electrode is moving from the first facing position to the second facing position, (d) is a state diagram in which the central first electrode and the second electrode are conductive, and (e) is a right side second state. FIG. 6 is a state diagram in which one electrode and a second electrode are conducted. It is a perspective view of the switching element which concerns on Embodiment 3 of this invention. It is the schematic diagram of the switching element which concerns on the same Embodiment 3, Comprising: (a) is a state figure which the 1st electrode and 2nd electrode of the left side conduct | electrically_connected, (b) is the 1st electrode and 2nd electrode of the right side, and FIG. It is a schematic diagram of the switching element according to the fourth embodiment of the present invention, (a) is a diagram showing the OFF state, (b) is a state diagram in which the left first electrode and the left second electrode are conducted, (C) is a state diagram in which the central first electrode and the central second electrode are electrically connected, and (d) is a state diagram in which the right first electrode and the right second electrode are electrically connected.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Switching element 2 ... Sealed container 2a ... Upper surface 2b ... Lower surface 3 ... Liquid 6 ... Lead wire 7 ... Tray 7a ... Bottom part 8 ... Lid 9 ... Carbon nanotube (fibrous particle, particle)
10 ... Shaft member 41, 42 ... Electrode 51 ... First electrode 52 ... Second electrode D1 ... Opposite spacing D2 ... Arrangement spacing

Claims (8)

In a liquid in which particles are dispersed, a pair of electrodes are arranged facing each other at a predetermined spacing,
By applying a high-frequency voltage between the pair of electrodes, the particles are dielectrophoresed in the liquid, and the electrodes are cross-linked to be in a conductive state, and the high-frequency voltage between the pair of electrodes is A switching element configured to stop the application of the particles to stop the dielectrophoresis of the particles, thereby breaking the bridge between the electrodes and releasing the conductive state. In the liquid in which particles are dispersed, a plurality of first electrodes are arranged at predetermined arrangement intervals, and one second electrode is movably arranged so as to be able to face these first electrodes at predetermined intervals. And
By moving the second electrode to an arbitrary position, a high-frequency voltage is applied between the first electrode and the second electrode with respect to the first electrode facing the second electrode among the plurality of first electrodes. Is applied, the particles are dielectrophoresed in the liquid, and the first electrode and the second electrode are cross-linked to be in a conductive state, and the first electrode and the second electrode By stopping the application of the high-frequency voltage between the two, the dielectrophoresis of the particles is stopped, the bridge between the first electrode and the second electrode is broken, and the conduction state is released. The switching element characterized by the above-mentioned. In the liquid in which the particles are dispersed, a plurality of first electrodes are arranged at a predetermined arrangement interval, and a plurality of second electrodes are arranged to face these first electrodes at a predetermined opposed interval,
By applying a high frequency voltage between the first electrode and the second electrode of the plurality of first electrodes and the plurality of second electrodes, which are arbitrarily opposed to each other, between the first electrode and the second electrode In addition, the particles are dielectrophoresed in the liquid to bridge between the first electrode and the second electrode to be in a conductive state, and the high frequency between the first electrode and the second electrode By stopping the application of voltage, the dielectrophoresis of the particles is stopped, the bridge between the first electrode and the second electrode is broken, and the conductive state is released. A characteristic switching element.   The switching element according to claim 2, wherein the facing interval is shorter than the arrangement interval.   The switching element according to claim 1, wherein the particles include fibrous particles.   The switching element according to claim 5, wherein the fibrous particles include carbon nanotubes.   The switching element according to claim 1, wherein the liquid has an insulating property.   A slide transformer comprising the switching element according to claim 1.

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