WO2015083341A1 - Élément de commutation, circuit de commutation et circuit d'avertissement - Google Patents

Élément de commutation, circuit de commutation et circuit d'avertissement Download PDF

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Publication number
WO2015083341A1
WO2015083341A1 PCT/JP2014/005865 JP2014005865W WO2015083341A1 WO 2015083341 A1 WO2015083341 A1 WO 2015083341A1 JP 2014005865 W JP2014005865 W JP 2014005865W WO 2015083341 A1 WO2015083341 A1 WO 2015083341A1
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WO
WIPO (PCT)
Prior art keywords
melting point
switch element
element according
electrodes
refractory metal
Prior art date
Application number
PCT/JP2014/005865
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English (en)
Japanese (ja)
Inventor
吉弘 米田
Original Assignee
デクセリアルズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Priority to CN201480065692.6A priority Critical patent/CN105814657B/zh
Priority to KR1020167014421A priority patent/KR102300950B1/ko
Publication of WO2015083341A1 publication Critical patent/WO2015083341A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H01H85/11—Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices

Definitions

  • the present invention relates to a switch element and a switch circuit, and more particularly to a switch element and a switch circuit that can be reduced in size and can be easily incorporated into an element that is operated by surface mounting.
  • An alarm fuse is generally used as a switch element for operating an alarm device.
  • An example of the alarm fuse is shown in FIG. 16.
  • a pair of alarm contacts are connected to the alarm circuit 105 for operating the alarm device in the fuse holder 100 and are spaced apart from each other in the normal state. 101, 102, a spring 103 for contacting the alarm contacts 101, 102, and a fuse wire 104 for holding the spring 103 in a position biased to a position separated from the alarm contact 102.
  • the alarm contacts 101 and 102 actuate the alarm circuit 105 when they come into contact with each other, and are formed of a conductive material having elasticity such as a leaf spring and are arranged close to each other.
  • the alarm circuit 105 operates, for example, an alarm system by operating a buzzer or a lamp, driving a thyristor or a relay circuit, or the like.
  • the spring 103 is held in a state of being biased to a position separated from the alarm contact 102 by the fuse wire 104. Then, the spring 103 is elastically restored when the fuse wire 104 is melted, and presses the alarm contact 102 to contact the alarm contact 101.
  • the fuse wire 104 holds the spring 103 in an elastically displaced state, and when it is energized according to the detection of various sensors, it fuses by self-heating and opens the spring 103.
  • the spring 103 is held in an elastically displaced state by the fuse wire 104, and the alarm contact 102 is physically pressed by fusing the fuse wire 104 to release the stress of the spring 103.
  • a configuration in which the alarm contacts 101 and 102 are short-circuited is used.
  • Such an alarm fuse uses a configuration in which an alarm circuit is activated by physical interlocking of mechanical elements. Therefore, the alarm fuse has a large configuration such as securing the movable range of the alarm contacts 101 and 102 and the spring 103. Therefore, it is difficult to use for a narrowed circuit, and the manufacturing cost is high.
  • the alarm circuit cannot be operated unless the current exceeding the rating is continuously supplied and the fuse wire 104 is blown.
  • an object of the present invention is to provide a switch element and a switch circuit that can be miniaturized and quickly activate a circuit, and an alarm circuit using the same, regardless of the interlocking of physical mechanical elements.
  • a switch element according to the present invention is mounted on an insulating substrate, first and second electrodes formed close to each other on the insulating substrate, and the first electrode.
  • the first soluble conductor is melted, the first electrode and the second electrode are connected via the molten conductor of the first soluble conductor, and are electrically short-circuited.
  • the switch circuit according to the present invention includes first and second electrodes that are open to each other and connected to an external circuit, and at least one of which has a soluble conductor mounted thereon.
  • the alarm circuit includes first and second electrodes that are open to each other and on which at least one of the fusible conductors is mounted, and is alarmed by a switch unit that short-circuits the first and second electrodes.
  • a control circuit having an operating circuit for operating the device, a fuse formed electrically independent of the operating circuit and having a melting point higher than the melting point of the soluble conductor, and a functional circuit in which the fuse is connected in series with a power source
  • the fusible conductor is melted by heat generated when the fuse is blown due to an overcurrent flowing when the functional circuit is abnormal, and the first and second electrodes are melted by the molten conductor of the fusible conductor.
  • the alarm is activated by short-circuiting.
  • the present invention since it can be configured without using mechanical elements such as springs and alarm contacts and without being physically linked with the mechanical elements, it can be designed compactly in the plane of the insulating substrate. It is possible to mount even in a narrowed mounting area. Further, according to the present invention, the switch is turned on by the heat of the refractory metal body, so that an abnormal overcurrent can be detected and the circuit can be operated without requiring the fuse to be cut off. Furthermore, according to the present invention, the insulating substrate can be surface-mounted by reflow mounting or the like, and can be easily mounted even in a narrowed mounting area.
  • FIG. 1 is a diagram showing a state before operation of a switch element to which the present invention is applied, in which (A) is a plan view, (B) is a sectional view taken along line AA ′, and (C) is a circuit diagram.
  • 2A and 2B are diagrams showing a state before operation of a switch element in which a second fusible conductor is mounted on a second electrode, where FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view along AA ′.
  • (C) is a circuit diagram.
  • FIG. 1 is a diagram showing a state before operation of a switch element to which the present invention is applied, in which (A) is a plan view, (B) is a sectional view taken along line AA ′, and (C) is a circuit diagram.
  • 2A and 2B are diagrams showing a state before operation of a switch element in which a second fusible conductor is mounted on a second electrode, where FIG. 2A
  • FIG. 3 is a view showing a state in which the refractory metal body of the switch element generates heat and the first and second electrodes are short-circuited through the melted conductor of the soluble conductor
  • (A) is a plan view
  • ) Is a cross-sectional view along the line AA ′
  • (C) is a circuit diagram.
  • 4A and 4B are diagrams showing a state where the refractory metal body of the switch element is melted, where FIG. 4A is a plan view, FIG. 4B is a cross-sectional view taken along line AA ′, and FIG. 4C is a circuit diagram.
  • FIG. 5 is a circuit diagram showing an alarm circuit.
  • FIG. 6A and 6B are diagrams showing a switch element in which a refractory metal body and a first electrode are connected, where FIG. 6A is a plan view, FIG. 6B is a cross-sectional view along AA ′, and FIG. is there.
  • FIG. 7 is a cross-sectional view showing a switch element in which a cover part electrode is formed on a cover member.
  • FIG. 8 is a diagram showing a switch element in which a refractory metal body, first and second electrodes, and first and second fusible conductors are superimposed on the surface of an insulating substrate, and FIG. FIG. 4B is a cross-sectional view along AA ′.
  • FIG. 4B is a cross-sectional view along AA ′.
  • FIG. 9 is a diagram showing a switch element in which a refractory metal body is formed on the back surface of an insulating substrate and superimposed on the first and second electrodes and the first and second soluble conductors formed on the surface of the insulating substrate.
  • (A) is a plan view and (B) is an AA ′ cross-sectional view.
  • FIG. 10 is a perspective view showing a soluble conductor having a high-melting-point metal layer and a low-melting-point metal layer and having a coating structure, and (A) is a structure in which the high-melting-point metal layer is an inner layer and is covered with a low-melting-point metal layer.
  • FIG. 11 is a perspective view showing a fusible conductor having a laminated structure of a high melting point metal layer and a low melting point metal layer, where (A) shows a two-layer structure of upper and lower layers, and (B) shows a three-layer structure of an inner layer and an outer layer.
  • FIG. 12 is a cross-sectional view showing a soluble conductor having a multilayer structure of a high melting point metal layer and a low melting point metal layer.
  • FIG. 13 is a plan view showing a soluble conductor in which a linear opening is formed on the surface of the refractory metal layer and the low melting point metal layer is exposed.
  • FIG. 13A shows the opening along the longitudinal direction.
  • the formed part (B) has an opening formed in the width direction.
  • FIG. 14 is a plan view showing a soluble conductor in which a circular opening is formed on the surface of the high melting point metal layer and the low melting point metal layer is exposed.
  • FIG. 15 is a plan view showing a soluble conductor in which a circular opening is formed in a refractory metal layer and a low melting metal is filled therein.
  • 16A and 16B are diagrams showing a conventional alarm element, where FIG. 16A is a cross-sectional view before operation, and FIG. 16B is a cross-sectional view after operation.
  • the switch element 1 to which the present invention is applied includes an insulating substrate 10, first and second electrodes 11, 12 formed on the insulating substrate 10 in proximity to each other, The first soluble conductor 13 mounted on the electrode 11 and the refractory metal body 15 formed on the insulating substrate 10 and having a melting point higher than that of the first soluble conductor 13 are included.
  • 1A is a plan view showing the switch element 1 excluding the cover member 20
  • FIG. 1B is a cross-sectional view along AA ′
  • FIG. 1C is a circuit diagram.
  • the first and second electrodes 11 and 12 are connected to an alarm device 31 including a buzzer, a lamp, an alarm system, or the like, and the first fusible conductor 13 is melted by the heat generated by the refractory metal body 15. By doing so, the first and second electrodes 11 and 12 are short-circuited by the molten conductor, and a buzzer, a lamp, an alarm system, or the like as the alarm device 31 is operated.
  • the insulating substrate 10 is formed in a substantially rectangular shape using an insulating member such as alumina, glass ceramics, mullite, zirconia, and the like.
  • the insulating substrate 10 may be made of a material used for a printed wiring board such as a glass epoxy board or a phenol board, but it is necessary to pay attention to the temperature at which the first soluble conductor 13 is melted.
  • the first and second electrodes 11 and 12 are opened by being arranged close to each other on the surface 10a of the insulating substrate 10 and separated from each other.
  • a first soluble conductor 13 described later is mounted on the first electrode 11.
  • the first and second electrodes 11 and 12 generate heat when the refractory metal body 15 is energized, so that the molten conductor of the first fusible conductor 13 extends between the first and second electrodes 11 and 12.
  • a switch 2 is formed which is agglomerated, joined and short-circuited via the molten conductor.
  • the switch element 1 may mount the 2nd soluble conductor 14 on the 2nd electrode 12, as shown in FIG.
  • the switch element 1 causes more molten conductors to aggregate between the first and second electrodes 11 and 12, faster and more reliably, The first and second electrodes 11 and 12 can be short-circuited.
  • the configuration of the switch element 1 shown in FIG. 2 in which the first soluble conductor 13 is provided on the first electrode 11 and the second soluble conductor 14 is provided on the second electrode 12 is taken as an example. explain.
  • the molten conductors of the first and second soluble conductors 13 and 14 can be easily aggregated.
  • the first and second electrodes 11 and 12 are provided with external connection terminals 11a and 12a on the side edges 10b and 10c of the insulating substrate 10, respectively.
  • the first and second electrodes 11 and 12 are connected to the alarm device 31 via these external connection terminals 11a and 12a, and the switch element 1 operates to provide a power supply path to the alarm device 31.
  • the first and second electrodes 11 and 12 can be formed using a general electrode material such as Cu or Ag.
  • a coating such as Ni / Au plating, Ni / Pd plating, or Ni / Pd / Au plating is coated on the surfaces of the first and second electrodes 11 and 12 by a known method such as plating.
  • the switch element 1 can prevent the first and second electrodes 11 and 12 from being oxidized, and can reliably hold the molten conductors of the first and second soluble conductors 13 and 14.
  • the connection solder 17 for connecting the first and second soluble conductors 13 and 14 or the outer layer of the first and second soluble conductors 13 and 14 is formed. It is possible to prevent the first and second electrodes 11 and 12 from being eroded (soldered) by melting the melting point metal.
  • the refractory metal body 15 is a conductive member that generates heat when energized, and is made of, for example, W, Mo, Ru, Cu, Ag, or an alloy containing these as main components.
  • the refractory metal body 15 is formed by mixing powders of these alloys, compositions, or compounds with a resin binder, etc., forming a paste using a screen printing technique, firing, and the like. can do.
  • the refractory metal body 15 is arranged on the surface 10 a of the insulating substrate 10 along with the first and second electrodes 11 and 12. As a result, when the refractory metal body 15 generates heat upon energization, the first and second soluble conductors 13 and 14 mounted on the first and second electrodes 11 and 12 can be melted. .
  • the refractory metal body 15 is provided with external connection terminals 15 a on the side edges 10 b and 10 c of the insulating substrate 10.
  • the refractory metal body 15 is connected to the functional circuit 32 that triggers the operation of the alarm device 31 through the external connection terminal 15 a, and generates heat due to an overcurrent accompanying abnormality of the functional circuit 32.
  • the refractory metal body 15 is relatively thin at positions close to the first and second fusible conductors 11 and 12, and a heat generating portion 15b that locally generates heat to a high temperature due to current concentration is provided. Is formed.
  • the heat generating portion 15b By providing the heat generating portion 15b at a position close to the first and second soluble conductors 11 and 12, the refractory metal body 15 efficiently melts the first and second soluble conductors 13 and 14, The first and second electrodes 11 and 12 can be quickly short-circuited.
  • the refractory metal body 15 has an appropriate current flowing within the rating when the functional circuit 32 is operating normally.
  • the refractory metal body 15 generates heat when an overcurrent flows due to an abnormality in the functional circuit 32, and as shown in FIG. 3, the first and second fusible conductors 13 and 14 are melted and the molten conductor is interposed. Thus, the first and second electrodes 11 and 12 are short-circuited.
  • the refractory metal body 15 continues to generate heat and is melted by its own Joule heat as shown in FIG.
  • the refractory metal body 15 is cut off from overcurrent due to an abnormality in the functional circuit 32 and stops generating heat. That is, the refractory metal body 15 functions as a fuse that melts the first and second fusible conductors 13 and 14 and interrupts its power supply path by self-heating.
  • the refractory metal body 15 is fused at the heat generating portion 15b by providing the heat generating portion 15b that is locally high in temperature. At this time, since the refractory metal body 15 has the heat generating portion 15b formed relatively thin, the arc discharge generated at the time of fusing is also small, and together with the covering effect of the insulating layer 16 described later, the molten conductor Can be prevented.
  • the refractory metal body 15 uses a refractory metal foil such as a copper foil or a silver foil, or a refractory metal wire such as a copper wire or a silver wire. May be formed.
  • a refractory metal foil such as a copper foil or a silver foil
  • a refractory metal wire such as a copper wire or a silver wire. May be formed.
  • the problem of leakage of the molten conductor after the melting of the refractory metal body 15 is less than that of the conductive pattern.
  • a ceramic substrate that is excellent in thermal conductivity and can quickly melt the first and second soluble conductors 13 and 14 can be suitably used as the insulating substrate 10.
  • the first and second electrodes 11, 12 and the refractory metal body 15 are covered with an insulating layer 16 on the surface 10 a of the insulating substrate 10.
  • the insulating layer 16 is provided to protect and insulate the first and second electrodes 11 and 12 and the refractory metal body 15, and to suppress arc discharge when the refractory metal body 15 is melted. Consists of layers.
  • the insulating layer 16 covers the heat generating portion 15 b of the refractory metal body 15 and is formed on a region excluding the tip portions 11 b and 12 b of the first and second electrodes 11 and 12.
  • the tip portions 11b and 12b of the first and second electrodes 11 and 12 are exposed from the insulating layer 16, and first and second soluble conductors 13 and 14 described later can be aggregated and combined. .
  • first and second electrodes 11 and 12 have an opening 16 a formed in a part of the insulating layer 16.
  • the first and second electrodes 11 and 12 are provided with connecting solder 17 at the tip end portions 11b and 12b and the opening portion 16a, and the connecting solder 17 is provided between the tip end portions 11b and 12b and the opening portion 16a.
  • the first and second soluble conductors 13 and 14 are supported on the insulating layer 16.
  • an insulating layer 16 made of glass or the like may be formed between the refractory metal body 15 and the insulating substrate 10. Thereby, the insulation resistance after interruption
  • the first and second fusible conductors 13 and 14 mounted on the first and second electrodes 11 and 12 through the insulating layer 16 can be quickly melted by the heat generated by the refractory metal body 15.
  • a metal can be used.
  • a low melting point metal such as solder or Pb-free solder containing Sn as a main component can be preferably used.
  • the first and second soluble conductors 13 and 14 may contain a low melting point metal and a high melting point metal.
  • the low melting point metal it is preferable to use solder, Pb-free solder containing Sn as a main component, and as the high melting point metal, it is preferable to use Ag, Cu or an alloy containing these as main components.
  • the low melting point metal melts, and the high melting point metal is eroded (soldered), so that the fusing can be quickly performed at a temperature lower than the melting point of the high melting point metal.
  • the 1st, 2nd soluble conductors 13 and 14 can be formed by various structures so that it may demonstrate later.
  • the first and second soluble conductors 13 and 14 are preferably coated with a flux 18 to prevent oxidation and improve wettability.
  • the switch element 1 as described above has a circuit configuration as shown in FIG. That is, in the switch element 1, the first electrode 11 and the second electrode 12 are opened during normal operation (FIG. 2C), and the first and second soluble conductors are generated by the heat generated by the refractory metal body 15. When 13 and 14 are melted, the switch 2 is configured to be short-circuited through the molten conductor (FIG. 3B).
  • the external connection terminals 11 a and 12 a of the first and second electrodes 11 and 12 constitute both terminals of the switch 2.
  • FIG. 5 is a diagram illustrating an example of a circuit configuration of the alarm circuit 30.
  • the alarm circuit 30 is formed independently of the operation circuit 33 for operating the alarm device 31 by the switch 2 of the switch element 1 and the operation circuit, and has a melting point higher than that of the first and second soluble conductors 13 and 14.
  • a control circuit 34 having a functional circuit connected in series to a power source.
  • both external connection terminals 11a and 12a of the switch 2 are connected to an alarm device 31 including a buzzer, a lamp, an alarm system, or the like.
  • both external connection terminals 15 a of the refractory metal body 15 are connected to the functional circuit 32.
  • the switch element 1 having such a configuration generates heat from the refractory metal body 15 formed adjacent to the first and second electrodes 11 and 12 constituting the switch 2 that operates the alarm device 31.
  • the first and second soluble conductors 13 and 14 are melted and short-circuited through the molten conductors. That is, in the switch element 1, the refractory metal body 15 and the first and second electrodes 11 and 12 are configured physically and electrically independently, and the first and second electrodes are heated by the heat of the refractory metal body 15.
  • the fusible conductors 13 and 14 are short-circuited by melting, so to speak, they are connected in a thermal manner.
  • the switch element 1 since the switch element 1 can be configured without using mechanical elements such as springs and alarm contacts and without being physically linked with the mechanical elements, the switch element 1 should be designed to be compact in the plane of the insulating substrate 10. Can be mounted in a narrowed mounting area. Further, the switch element 1 can reduce the number of parts and the number of manufacturing steps, and can reduce the cost. Furthermore, the switch element 1 can be mounted on the surface of the insulating substrate 10 by reflow mounting or the like, and can be easily mounted even in a narrowed mounting region.
  • the switch element 1 is provided with a thin heat generating portion 15b in the vicinity of the first and second soluble conductors 13 and 14 of the refractory metal body 15, so that the high resistance heat generating portion 15b has a high temperature.
  • the first and second soluble conductors 13 and 14 can be efficiently melted, and the first and second electrodes 11 and 12 can be short-circuited quickly.
  • the high resistance heat generating portion 15b is only locally heated, and both the external connection terminals 15a facing the side edges are kept at a relatively low temperature due to the heat dissipation effect. Therefore, the switch element 1 does not melt the solder for mounting the external connection terminal 15a.
  • the refractory metal body 15 continues to generate heat after the short circuit between the first and second electrodes 11 and 12, and is blocked by its own Joule heat (FIGS. 4A and 4B).
  • the switch element 1 is deenergized by the functional circuit 32 and stops generating heat (FIG. 4C).
  • the switch element 1 can suppress arc discharge and suppress explosive scattering of the molten conductor.
  • the heat generating portion 15b that is thinly formed on the refractory metal body 15, the fusing part is narrowed, and the amount of the molten conductor scattered can be reduced.
  • the switch element 1 is surely configured so that the refractory metal body 15 having a higher melting point than the first and second soluble conductors 13 and 14 generates heat, so that the first and second soluble conductors 13, 14 melts before the refractory metal body 15, and the first and second electrodes 11 and 12 can be short-circuited. That is, in the switching element 1, the interruption of the refractory metal body 15 is not a requirement for short-circuiting the first and second electrodes 11 and 12. Therefore, the switch element 1 can be used as an alarm switch that notifies that a current exceeding the rating of the refractory metal body 15 has flowed due to an abnormality in the functional circuit 32.
  • the refractory metal body 15 automatically stops generating heat by being cut off by its own Joule heat. Therefore, the switch element 1 does not need to be provided with a mechanism for restricting the power supply by the functional circuit 32, can stop the heat generation of the refractory metal body 15 with a simple configuration, and can reduce the size of the entire element. .
  • connection portion 19 that connects the refractory metal body 15 and the first electrode 11 on which the first soluble conductor 13 is mounted.
  • the connection portion 19 can be provided by patterning in the same process as the refractory metal body 15 and the first electrode 11 using the same conductive material as that of the refractory metal body 15 and the first electrode 11, for example. .
  • the switch element 1 By connecting the refractory metal body 15 and the first electrode 11, the switch element 1 generates heat through the connection portion 19 and the first electrode 11 when the refractory metal body 15 generates heat when energized. It is transmitted to the soluble conductor 13 and can be melted more rapidly. Therefore, it is preferable to form the connection part 19 with metal materials, such as Ag and Cu, which are excellent in thermal conductivity.
  • a cover member 20 that protects the inside is attached on an insulating substrate 10.
  • the inside of the switch element 1 is protected by covering the insulating substrate 10 with the cover member 20.
  • the cover member 20 includes a side wall 21 that constitutes a side surface of the switch element 1 and a top surface portion 22 that constitutes an upper surface of the switch element 1, and the side wall 21 is connected to the insulating substrate 10. It becomes a lid that closes the inside of the.
  • the cover member 20 is formed using an insulating member such as a thermoplastic, ceramic, glass epoxy substrate, etc., as with the insulating substrate 10.
  • the cover member 20 may have a cover portion electrode 23 formed on the inner surface side of the top surface portion 22.
  • the cover part electrode 23 is formed at a position that overlaps between the tip parts 11 b and 12 b of the first and second electrodes 11 and 12.
  • the cover electrode 23 is a molten conductor that aggregates on the first and second electrodes 11 and 12 when the refractory metal body 15 generates heat and the first and second soluble conductors 13 and 14 are melted.
  • the allowable amount for holding the molten conductor can be increased, and the first and second electrodes 11 and 12 can be short-circuited more reliably.
  • the refractory metal body and the first and second electrodes may be superimposed on the surface of the insulating substrate.
  • the same components as those of the above-described switch element 1 are denoted by the same reference numerals and the details thereof are omitted.
  • the refractory metal body 15 is formed between the opposite side edges 10d and 10e of the surface 10a of the insulating substrate 10.
  • the first and second electrodes 11 and 12 are formed on opposite side edges 10 b and 10 c of the surface 10 a of the insulating substrate 10.
  • the refractory metal body 15 is covered with a first insulating layer 41 at a substantially central portion of the insulating substrate 10.
  • the refractory metal body 15 has external connection terminals 15 a formed on the side edges 10 d and 10 e of the insulating substrate 10. Further, the refractory metal body 15 is formed with a heat generating portion 15b that generates heat at a high temperature by forming an intermediate portion where the first and second electrodes 11 and 12 overlap with each other narrower than both ends.
  • the first and second electrodes 11 and 12 have external connection terminals 11a and 12a formed on the side edges 10b and 10c of the insulating substrate 10, respectively.
  • the first and second electrodes 11 and 12 are formed from the side edges 10 b and 10 c to the upper surface of the first insulating layer 41, and the tip portions 11 b and 12 b are close to each other on the upper surface of the first insulating layer 41. And opened by being separated.
  • the first and second electrodes 11 and 12 are covered with a second insulating layer 42 except for the tip portions 11b and 12b.
  • an opening 42a is partially formed.
  • the first and second electrodes 11 and 12 are provided with connecting solder at the tip portions 11b and 12b and the opening 42a, and the connecting solder extends between the tip portions 11b and 12b and the opening 42a.
  • the first and second soluble conductors 13 and 14 are supported on the second insulating layer 42. Thereby, at least a part of the tip portions 11 b and 12 b of the first and second electrodes 11 and 12 and the first and second soluble conductors 13 and 14 overlap with the heat generating portion 15 b of the refractory metal body 15. Has been.
  • a flux 18 is applied on the first and second soluble conductors 13 and 14 to prevent oxidation and improve wettability.
  • an insulating material such as glass can be suitably used, as with the insulating layer 16 of the switch element 1 described above.
  • the switch element 40 includes the heat generating portion 15b, the first and second electrodes 11, 12 and the first and second fusible elements via the first and second insulating layers 41 and 42 made of glass or the like. Since the conductors 13 and 14 are continuously laminated, the heat of the heat generating portion 15b can be efficiently conducted.
  • the switch element to which the present invention is applied has the first and second electrodes formed on the surface of the insulating substrate, and the refractory metal body is formed on the back surface of the insulating substrate.
  • the second electrode may be overlapped.
  • the same components as those of the above-described switch element 1 are denoted by the same reference numerals and the details thereof are omitted.
  • the refractory metal body 15 is formed between the opposite side edges 10d and 10e of the back surface 10f of the insulating substrate 10.
  • the first and second electrodes 11 and 12 are formed on opposite side edges 10 b and 10 c of the surface 10 a of the insulating substrate 10.
  • the refractory metal body 15 is covered with a first insulating layer 51 at a substantially central portion of the insulating substrate 10.
  • the refractory metal body 15 has external connection terminals 15 a formed on the side edges 10 d and 10 e of the insulating substrate 10. Further, the refractory metal body 15 is formed with a heat generating portion 15b that generates heat at a high temperature by forming an intermediate portion where the first and second electrodes 11 and 12 overlap with each other narrower than both ends.
  • the first and second electrodes 11 and 12 have external connection terminals 11a and 12a formed on the side edges 10b and 10c of the insulating substrate 10, respectively. Further, the first and second electrodes 11 and 12 are opened when the front end portions 11b and 12b are brought close to and separated from the side edges 10b and 10c at the substantially central portion of the surface 10a of the insulating substrate 10. ing. The first and second electrodes 11 and 12 are covered with a second insulating layer 52 except for the tip portions 11b and 12b.
  • an opening 52a is formed in part.
  • the first and second electrodes 11 and 12 are provided with connecting solder at the tip portions 11b and 12b and the opening 52a, and the connecting solder extends between the tip portions 11b and 12b and the opening 52a.
  • the first and second soluble conductors 13 and 14 are supported on the second insulating layer 52. Thereby, at least a part of the tip portions 11 b and 12 b of the first and second electrodes 11 and 12 and the first and second soluble conductors 13 and 14 overlap with the heat generating portion 15 b of the refractory metal body 15. Has been.
  • a flux 18 is applied on the first and second soluble conductors 13 and 14 to prevent oxidation and improve wettability.
  • an insulating material such as glass can be suitably used, as in the case of the insulating layer 16 of the switch element 1 described above.
  • the first and second electrodes 11 and 12 and the first and second soluble conductors 13 and 14 are arranged so as to overlap the heat generating portion 15 b of the refractory metal body 15. Therefore, the first and second soluble conductors 13 and 14 can be quickly melted by the heat generated by the heat generating portion 15b, and the first and second electrodes 11 and 12 can be short-circuited.
  • the switch element 50 is provided with the refractory metal body 15 of the first and second fusible conductors 13 and 14 by using an insulating substrate 10 having excellent thermal conductivity such as a ceramic substrate. It is preferable because it can be heated to the same level as when it is formed on the same surface as the other surface.
  • any or all of the first and second soluble conductors 13 and 14 may contain a low melting point metal and a high melting point metal.
  • the refractory metal layer 60 is made of Ag, Cu or an alloy containing these as a main component
  • the low melting metal layer 61 is made of Pb-free solder containing Sn as a main component.
  • the first and second soluble conductors 13 and 14 may be provided with a high melting point metal layer 60 as an inner layer and a low melting point metal layer 61 as an outer layer.
  • a molten conductor may be used.
  • the first and second fusible conductors 13 and 14 may have a structure in which the entire surface of the high melting point metal layer 60 is covered with the low melting point metal layer 61 and is covered except for a pair of opposite side surfaces. It may be a structure.
  • the covering structure with the high melting point metal layer 60 and the low melting point metal layer 61 can be formed using a known film forming technique such as plating.
  • the first and second soluble conductors 13 and 14 are soluble in which a low melting point metal layer 61 is provided as an inner layer and a high melting point metal layer 60 is provided as an outer layer.
  • a conductor may be used.
  • the first and second fusible conductors 13 and 14 may have a structure in which the entire surface of the low melting point metal layer 61 is covered with the high melting point metal layer 60 and is covered except for a pair of opposing side surfaces. The structure may be different.
  • first and second fusible conductors 13 and 14 may have a laminated structure in which a high melting point metal layer 60 and a low melting point metal layer 61 are laminated as shown in FIG.
  • the first and second fusible conductors 13 and 14 are laminated on the lower layer supported by the first and second electrodes 11 and 12 and on the lower layer, as shown in FIG.
  • the lower melting point metal layer 61 may be laminated on the upper surface of the lower refractory metal layer 60, and on the contrary, the lower melting point metal layer 61 may be laminated on the upper surface.
  • the upper refractory metal layer 60 may be laminated.
  • the first and second soluble conductors 13 and 14 may be formed as a three-layer structure including an inner layer and an outer layer laminated on the upper and lower surfaces of the inner layer, as shown in FIG.
  • the low melting point metal layer 61 serving as the outer layer may be laminated on the upper and lower surfaces of the refractory metal layer 60 serving as the inner layer. Conversely, the refractory metal layer 60 serving as the outer layer may be disposed on the upper and lower surfaces of the low melting point metal layer 61 serving as the inner layer. You may laminate.
  • the first and second soluble conductors 13 and 14 may have a multilayer structure of four or more layers in which high melting point metal layers 60 and low melting point metal layers 61 are alternately laminated.
  • the 1st, 2nd soluble conductors 13 and 14 are good also as a structure coat
  • the first and second soluble conductors 13 and 14 may be formed by partially laminating the refractory metal layer 60 in a stripe shape on the surface of the low melting point metal layer 61 constituting the inner layer.
  • FIG. 13 is a plan view of the first and second fusible conductors 13 and 14.
  • the first and second soluble conductors 13 and 14 shown in FIG. 13A have a plurality of linear refractory metal layers 60 in the longitudinal direction on the surface of the low melting point metal layer 61 at predetermined intervals in the width direction.
  • a linear opening 62 is formed along the longitudinal direction, and the low melting point metal layer 61 is exposed from the opening 62.
  • the low melting point metal layer 61 is exposed from the opening 62, thereby increasing the contact area between the molten low melting point metal and the high melting point metal, and the high melting point metal layer 60. It is possible to improve the fusing property by further promoting the erosion action.
  • the opening 62 can be formed, for example, by subjecting the low melting point metal layer 61 to partial plating of a metal constituting the high melting point metal layer 60.
  • the first and second soluble conductors 13 and 14 are formed on the surface of the low melting point metal layer 61 at a predetermined interval in the longitudinal direction at the linear refractory metal layer 60.
  • the linear openings 62 may be formed along the width direction.
  • the first and second fusible conductors 13 and 14 form a refractory metal layer 60 on the surface of the low melting point metal layer 61 and extend over the entire surface of the refractory metal layer 60.
  • a circular opening 63 may be formed, and the low melting point metal layer 61 may be exposed from the opening 63.
  • the opening 63 can be formed, for example, by subjecting the low melting point metal layer 61 to partial plating of a metal constituting the high melting point metal layer 60.
  • the contact area between the molten low melting point metal and the high melting point metal is increased, and the high melting point metal is eroded.
  • the action can be further promoted to improve the fusing property.
  • the first and second soluble conductors 13 and 14 are formed with a large number of openings 64 in the refractory metal layer 60 serving as an inner layer, and the refractory metal layer 60 is plated.
  • the low melting point metal layer 61 may be formed using a technique or the like and filled in the opening 64.
  • the first and second soluble conductors 13 and 14 increase the area where the low melting point metal to be in contact with the high melting point metal increases, so that the low melting point metal erodes the high melting point metal in a shorter time. Will be able to.
  • the first and second soluble conductors 13 and 14 are preferably formed such that the volume of the low melting point metal layer 61 is larger than the volume of the high melting point metal layer 60.
  • the first and second soluble conductors 13 and 14 are heated by the high-melting point metal body 15 to melt the low-melting point metal when the low-melting point metal melts, thereby quickly melting and cutting. Can do. Therefore, the first and second fusible conductors 13 and 14 promote the erosion action by forming the volume of the low melting point metal layer 61 larger than the volume of the high melting point metal layer 60, and promptly. A short circuit between the first and second electrodes 11 and 12 can be performed.
  • switch element 2 switch, 10 insulating substrate, 10a front surface, 10f back surface, 11 first electrode, 12 second electrode, 13 first soluble conductor, 14 second soluble conductor, 15 Refractory metal body, 16 insulating layer, 17 connecting solder, 18 flux, 19 connecting part, 20 cover member, 21 side wall, 22 top surface part, 23 cover part electrode, 30 alarm circuit, 31 alarm device, 32 functional circuit

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)

Abstract

Selon l'invention, pour un fonctionnement de circuit rapide et une compacité sans entrecroiser des éléments de machine physique, cet élément de commutation est pourvu d'un substrat d'isolation (10), de première et seconde électrodes (11, 12) formées de manière adjacente sur le substrat d'isolation (10), d'un premier conducteur de fusible (13), monté sur la première électrode (11), et d'un corps métallique à point de fusion élevé (15), formé sur le substrat d'isolation (10) et ayant un point de fusion supérieur à celui du conducteur de fusible (13). Le premier conducteur de fusible (13) est fondu par une chaleur générée par une surintensité sur le corps métallique à point de fusion élevé (15), connectant la première électrode (11) et la seconde électrode (12) par ledit conducteur fondu, provoquant un court-circuit électrique.
PCT/JP2014/005865 2013-12-02 2014-11-21 Élément de commutation, circuit de commutation et circuit d'avertissement WO2015083341A1 (fr)

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CN201480065692.6A CN105814657B (zh) 2013-12-02 2014-11-21 开关元件、开关电路以及报警电路
KR1020167014421A KR102300950B1 (ko) 2013-12-02 2014-11-21 스위치 소자, 스위치 회로 및 경보 회로

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EP4054024A1 (fr) * 2021-03-03 2022-09-07 Aptiv Technologies Limited Détection passive de surchauffe dans un connecteur d'alimentation

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JP6886810B2 (ja) * 2016-12-12 2021-06-16 デクセリアルズ株式会社 保護素子
WO2019103211A1 (fr) * 2017-11-27 2019-05-31 (주)알엔투테크놀로지 Fusible de puce en céramique sans plomb et son procédé de fabrication
DE102017222642A1 (de) 2017-12-13 2019-06-27 Bayerische Motoren Werke Aktiengesellschaft Elektrochemisches energiespeichermodul und fahrzeug
JP1701719S (fr) * 2021-01-18 2021-12-06
JP1701720S (fr) * 2021-01-18 2021-12-06
JP1701718S (fr) * 2021-01-18 2021-12-06

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FR3120481A1 (fr) * 2021-03-03 2022-09-09 Aptiv Technologies Limited Détection passive de la surchauffe dans un connecteur de puissance
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KR102300950B1 (ko) 2021-09-13
JP2015106542A (ja) 2015-06-08
CN105814657B (zh) 2018-11-09
TW201535449A (zh) 2015-09-16
CN105814657A (zh) 2016-07-27
KR20160093620A (ko) 2016-08-08
TWI655661B (zh) 2019-04-01

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