TW201603086A - Short-circuit element - Google Patents

Abstract

Provided is a short-circuit element in which melting of a fusible conductor reliably causes a short circuit between short circuit electrodes. This short-circuit element is provided with a first electrode (11), a second electrode (12) which is provided adjacent to the first electrode (11), a first fusible conductor (13) which is supported by the first electrode (11), and which, by being melted, aggregates across the interval between the first and second electrodes (11, 12), causing a short circuit between the first and second electrodes (11, 12), and a heat-generating conductor (14) which heats the first fusible conductor (13), wherein the first fusible conductor (13) is supported projecting towards the second electrode (12).

Description

Short circuit component

The present invention relates to short-circuiting elements that physically and electrically short-circuit power lines or signal lines in an open state by electrical signals.

The present application claims priority on the basis of Japanese Patent Application No. 2014-116003, filed on Jun.

Most rechargeable secondary batteries are processed into battery packs and supplied to the user. In particular, in order to ensure the safety of users and electronic equipment, lithium ion secondary batteries having a high weight and energy density are generally provided in a battery pack such as overcharge protection and overdischarge protection. The function of blocking the output of the battery pack.

Such a protection element may be turned ON/OFF using an FET switch built in a battery pack to perform an overcharge protection or an overdischarge protection operation of the battery pack. However, in the case where the FET switch is short-circuited and damaged for some reason, or a large current flows instantaneously when a lightning surge or the like is applied, or the output voltage is abnormally lowered due to the life of the battery unit, or vice versa. When the abnormal voltage or the voltage unevenness of the battery unit becomes large, the battery pack or the electronic device must be protected from accidents such as fire. Therefore, in order to safely block the output of the battery cell in any of the above-mentioned abnormal states, a protection element composed of a fuse element having a signal blocking current path from the outside is used. Features.

As a protective element suitable for a protective circuit of a lithium ion secondary battery or the like, as disclosed in Patent Document 1, a current is formed by bridging a soluble conductor between a first electrode on a current path, a heating element drawing electrode, and a second electrode. In one part of the path, the fusible conductor on the current path is self-heated by the overcurrent or the heating element provided inside the protection element is blown. Such a protective element separates the first and second electrodes to block the current path by collecting the molten liquid-like soluble conductor on the conductor layer connected to the heating element.

[Advanced technical literature]

Patent Document 1: Japanese Laid-Open Patent Publication No. 2010-003665

Patent Document 2: Japanese Laid-Open Patent Publication No. 2004-185960

Patent Document 3: Japanese Laid-Open Patent Publication No. 2012-003878

Further, in recent years, HEVs (Hybrid Electric Vehicles) or EVs (Electric Vehicles) using batteries and motors have rapidly spread. As a power source of HEV or EV, a lithium ion secondary battery is gradually used from the viewpoint of energy density and output characteristics. In automotive applications, high voltage and high current are required. Therefore, a dedicated unit capable of withstanding high voltage and large current has been developed, but in consideration of manufacturing cost, in most cases, a plurality of battery cells are connected in series and in parallel, and a common unit is used to secure a required voltage and current.

Here, in a car that is moving at a high speed, there is a case where the driving force of the rapid speed is lowered or the emergency stop is dangerous, and therefore battery management in an emergency state is also required. For example, even if an abnormality of the battery system occurs during running, in order to avoid danger, it is preferable to supply a driving force for moving to a repair factory or a safe place, or a driving force for a warning light and an air conditioner.

However, in the battery pack in which a plurality of battery cells are connected in series in Patent Document 1, in the case where the protective component is provided only on the charge and discharge path, when one of the battery cells is abnormal and the protective component is activated, the battery pack is charged and discharged as a whole. The path is blocked and it is no longer possible to supply power continuously.

Therefore, there has been proposed a short-circuiting element capable of forming a bypass path that bypasses only an abnormal battery cell in order to exclude only an abnormal battery cell in a battery pack composed of a plurality of cells and to effectively utilize a normal battery cell.

Fig. 45 shows an example of the configuration of the short-circuiting element, and Fig. 45 shows a circuit diagram of the battery circuit to which the short-circuiting element is applied. As shown in FIGS. 45 and 46, the short-circuiting element 100 has the first and second short-circuit electrodes 102 and 103 which are connected in parallel with the battery cell 101 in the charge/discharge path and are normally opened, and the first and second short-circuits are caused by melting. The two fusible conductors 104a, 104b short-circuited between the electrodes 102, 103, and the heat generating body 105 which is connected in series with the fusible conductor 104a and melts the fusible conductors 104a, 104b.

The short-circuiting element 100 is formed on an insulating substrate 110 such as a ceramic substrate, and has a heating element 105 and an external connection electrode 111 connected to one end of the heating element 105. Further, the short-circuiting element 100 is connected to the heating element 105, and the heating element electrode 113 connected to the other end of the heating element 105, the first and second short-circuit electrodes 102, 103, and the first and the third are formed via the insulating layer 112 such as glass. 2 The short-circuit electrodes 102, 103 together support the first and second support electrodes 114, 115 of the fusible conductors 104a, 104b.

The first support electrode 114 is connected to the heat generating body electrode 113 exposed on the insulating layer 112 and adjacent to the first short-circuit electrode 102. The first support electrode 114 supports both sides of one of the fusible conductors 104a together with the first short-circuit electrode 102. Similarly, the second support electrode 115 is adjacent to the second short-circuit electrode 103, and supports the both sides of the other meltable conductor 104b together with the second short-circuit electrode 103.

The short-circuiting element 100 reaches the first short-circuit electrode 102 from the external connection electrode 111 via the heating element 105, the heating element electrode 113, and the soluble conductor 104a, and constitutes a power supply path to the heating element 105.

The heating element 105 is self-heated by the current flowing through the power supply path, and the soluble conductors 104a and 104b are melted by the heat (Joule heat). As shown in FIG. 46, the heating element 105 is connected to a current control element 106 such as an FET via an external connection electrode 111. The current control element 106 is controlled to restrict the supply of power to the heating element 1105 when the battery unit 101 is normal, and to apply current to the heating element 105 via the charging and discharging path when an abnormality occurs.

When the battery unit 101 detects an abnormal voltage or the like, that is, the battery unit 101 is blocked from the charge and discharge path by the protection element 107, and the current control element 106 is actuated, the heating element is applied to the heating element. 105 is connected to current. Thereby, the fusible conductors 104a, 104b are melted by the heat of the heating element 105. The fusible conductors 104a and 104b are melted toward the first and second short-circuit electrodes 102 and 103 on the relatively wide area, and the molten conductor is condensed and bonded between the two short-circuit electrodes 102 and 103. Therefore, the short-circuit electrodes 102, 103 are short-circuited by the fused conductors of the fusible conductors 104a, 104b, whereby a current path bypassing the battery cell 101 can be formed.

Further, the short-circuiting element 100 is moved to the first short-circuiting electrode 102 side by the meltable conductor 104a and melted, and the first supporting electrode 114 and the first short-circuiting electrode 102 are opened, whereby the power supply path to the heating element 105 is blocked. Therefore, the heat generation of the heating element 105 is stopped.

Here, in the short-circuiting element 100, it is required to reliably short-circuit the short-circuit electrodes 102, 103 by the melting of the fusible conductors 104a, 104b. That is, the short-circuiting element 100 is required to be condensed between the short-circuited electrodes 102, 103 by the molten conductors of the fusible conductors 104a, 104b so as to short-circuit the short-circuited electrodes 102, 103 so that more of the molten conductors are condensed on the short-circuited electrodes 102, 103.

However, in order to condense more of the molten conductor on the short-circuit electrodes 102, 103, the short-circuit electrodes 102, 103 are relatively wider than the first and second support electrodes 114, 115, for example, during the reflow assembly of the short-circuiting element 100, etc. The fusible conductors 104a, 104b may be separated from the first and second support electrodes 114, 115 and moved to the short-circuit electrodes 102, 103. Therefore, the short-circuiting element 100 has a risk that the power supply path to the heating element 105 is blocked before the operation and the initial short-circuit between the short-circuit electrodes 102 and 103 is short-circuited.

Further, if the area of the short-circuit electrodes 102, 103 is narrowed in order to reduce the risk of the initial short-circuit, the melted conductors of the fusible conductors 104a, 104b may not lie between the short-circuit electrodes 102, 103, and the short-circuit electrodes 102, 103 may not be short-circuited.

Therefore, it is desirable to have a short-circuiting element capable of forming a bypass current path by short-circuiting short-circuited electrodes by melting of a fusible conductor in various circuits such as a battery circuit.

In order to solve the above problems, the short-circuiting element of the present invention includes: a first electrode; a second electrode disposed adjacent to the first electrode; and the first meltable conductor supported by the first electrode and condensed throughout the melting The first and second electrodes are short-circuited between the first and second electrodes, and the heating element heats the first meltable conductor. The first meltable conductor protrudes toward the second electrode and is supported.

According to the short-circuiting element of the present invention, the first fusible conductor is thermally fused by the heat generating body after the heat generating body generates heat, and the molten conductor protruding from the second electrode side is condensed around the first electrode, thereby also the first electrode When the second electrodes adjacent to each other are in contact, the first and second electrodes can be short-circuited.

1‧‧‧Short-circuit components

2‧‧‧Switch

3‧‧‧Power supply path

10‧‧‧Insert substrate

10a‧‧‧ surface

10b‧‧‧back

11‧‧‧1st electrode

11a‧‧‧External connection terminal

12‧‧‧2nd electrode

12a‧‧‧External connection terminal

13‧‧‧1st fusible conductor

13a‧‧‧fused conductor

14‧‧‧heating body

15‧‧‧Material

17‧‧‧Insulation

18‧‧‧Feature body pull-out electrode

18a‧‧‧ Lower Department

18b‧‧‧Upper Department

19‧‧‧Heating body electrode

21‧‧‧Auxiliary fusible conductor

22‧‧‧Support electrode

23‧‧‧Insulation

24‧‧‧ Flux

25‧‧‧ Covering components

26‧‧‧External connection electrode

28‧‧‧External circuit

32‧‧‧Current control components

35‧‧‧Detection components

40‧‧‧Short-circuit components

50‧‧‧Short-circuit components

51‧‧‧1st circuit

52‧‧‧External Circuit

53‧‧‧External power supply

60‧‧‧Short-circuit components

70‧‧‧Short-circuit components

71‧‧‧heating body power supply electrode

72‧‧‧2nd fusible conductor

80‧‧‧Short-circuit components

81‧‧‧1st insulation layer

82‧‧‧2nd insulation layer

83‧‧‧Support electrode

90‧‧‧Short-circuit components

91‧‧‧High melting point metal layer

92‧‧‧low melting point metal layer

93‧‧‧ openings

94‧‧‧ openings

95‧‧‧ openings

96‧‧‧Conductor belt

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a short-circuiting element to which the present invention is applied, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 2 is a view showing a state in which the short-circuiting element of the present invention is actuated, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 3 is a circuit diagram showing the short-circuiting element to which the present invention is applied.

Fig. 4 is a circuit configuration diagram showing a state in which the short-circuiting element of the present invention is actuated.

Fig. 5 is a view showing a short-circuiting element having an auxiliary fusible conductor, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 6 is a view showing a state in which a short-circuiting element having an auxiliary fusible conductor is actuated, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 7 is a view showing a state in which other short-circuiting elements of the present invention are actuated, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 8 is a view showing a state in which other short-circuiting elements of the present invention are actuated, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 9 is a view showing another short-circuiting element having an auxiliary fusible conductor, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 10 is a view showing a short-circuiting element including a supporting electrode, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 11 is a view showing another short-circuiting element having a supporting electrode, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 12(A) is a plan view showing a short-circuiting element of a surface-mount type, and Fig. 12(B) is a plan view showing a heat generating body or the like passing through the short-circuiting element, and Fig. 12(C) is an A-A of Fig. 12(A). 'Profile view.

Fig. 13 is a view showing a short-circuiting element of a surface structure type in which heat is generated in a heating element, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 14 is a view showing a short-circuiting element of a surface-mount type after the heat generation of the heating element is stopped, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 15 is a view showing a short-circuiting element having a surface structure of a supporting electrode, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 16 is a view showing another short-circuiting element of the surface structure type, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 17 is a view showing another short-circuiting element having a surface-mounting type of a supporting electrode, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 18 is a view showing a short-circuiting element electrically connected to the first and second electrodes of the heating element, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

19(A) and (B) are diagrams showing the circuit configuration of the short-circuiting element in which the power supply path of the heating element and the first and second electrodes are electrically independent.

Fig. 20 is a view showing an example of a short circuit for applying a short-circuiting element which is electrically independent of the power supply path of the heating element and the first and second electrodes.

Fig. 21 is a view showing a short-circuiting element having an auxiliary fusible conductor, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 22 is a view showing a short-circuiting element including a second fusible conductor in a power supply path of the heat generating body, wherein (A) is a plan view and (B) is a cross-sectional view taken along line A-A'.

Fig. 23 is a view showing a state in which a short-circuiting element having a second meltable conductor is actuated, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 24 is a view showing a state of a short-circuiting element including a second fusible conductor and an auxiliary fusible conductor, wherein (A) is a plan view and (B) is a cross-sectional view taken along line A-A'.

Fig. 25 is a view showing a short-circuiting element of a surface structure type, (A) is a plan view, (B) is a cross-sectional view taken along line A-A', and (C) is a cross-sectional view taken along line B-B'.

Fig. 26 is a plan view showing the short-circuiting element shown in Fig. 25 in which the first fusible conductor is removed.

Fig. 27 is a view showing a state in which the heating element starts to generate heat in the short-circuiting element shown in Fig. 25, wherein (A) is a plan view, (B) is a cross-sectional view taken along line A-A', and (C) is a cross-sectional view taken along line B-B'.

Fig. 28 is a view showing a state after the heat generation of the heating element is stopped in the short-circuiting element shown in Fig. 25, wherein (A) is a plan view, (B) is a cross-sectional view taken along line A-A', and (C) is a B-B' profile. Figure.

Fig. 29 is a plan view showing a short-circuiting element in which an insulating layer is provided between the first and second electrodes.

Fig. 30 is a view showing a short-circuiting element provided with a second electrode on the top surface of the covering member, wherein (A) is a plan view, (B) is a cross-sectional view taken along line A-A', and (C) is a cross-sectional view taken along line B-B'.

Fig. 31 is a view showing a state in which the short-circuiting element shown in Fig. 30 is actuated, (A) is a plan view, (B) is a cross-sectional view taken along line A-A', and (C) is a cross-sectional view taken along line B-B'.

32(A) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided on the back surface side of the insulating substrate, and (B) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided inside the insulating substrate.

33(A) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided on the back surface side of the insulating substrate, and (B) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided inside the insulating substrate.

Fig. 34(A) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided on the back surface side of the insulating substrate, and (B) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided inside the insulating substrate.

35(A) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided on the back surface side of the insulating substrate, and (B) is a cross-sectional view showing a short-circuiting element in which a heat generating body is provided inside the insulating substrate.

36 is a perspective view showing a fusible conductor having a high melting point metal layer and a low melting point metal layer and having a coated structure, and (A) showing a structure in which a high melting point metal layer is used as an inner layer and covered with a low melting point metal layer, (B) The structure showing a low melting point metal layer as an inner layer and a high melting point metal layer is shown.

37 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, wherein (A) shows a top and bottom double layer structure, and (B) shows a three layer structure of an inner layer and an outer layer.

38 is a cross-sectional view showing a fusible conductor having a multilayer structure of a high melting point metal layer and a low melting point metal layer.

39 is a plan view showing a fusible conductor in which a linear opening is formed on a surface of a high melting point metal layer and a low melting point metal layer is exposed, wherein (A) is formed with an opening in the longitudinal direction, and (B) is in the width direction. An opening is formed.

Fig. 40 is a plan view showing a fusible conductor in which a circular opening portion is formed on the surface of the high melting point metal layer and the low melting point metal layer is exposed.

41 is a plan view showing a fusible conductor in which a circular opening portion is formed in a high melting point metal layer and a low melting point metal is filled inside.

Figure 42 is a perspective view showing a fusible conductor exposing a low melting point metal surrounded by a high melting point metal.

Figure 43 is a view showing a state before the operation of the short-circuiting element using the fusible conductor shown in Figure 42, (A) is a plan view, (B) is a cross-sectional view taken along line A-A', and (C) is B-B' Sectional view.

Fig. 44 is a view showing a state before the operation of the short-circuiting element using the fusible conductor shown in Fig. 42, (A) is a plan view, and (B) is a cross-sectional view taken along line A-A'.

Fig. 45 is a plan view showing a short-circuiting element of a reference example.

Fig. 46 is a view showing the configuration of a battery circuit using the short-circuiting element of the reference example.

Hereinafter, a short-circuiting element and a short-circuiting circuit to which the present invention is applied will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications can be made without departing from the spirit and scope of the invention. Moreover, the drawings are shown in a schematic manner, and there are cases where the ratio of each size is different from the reality. The specific dimensions and the like should be judged by the following instructions. Further, the drawings naturally contain portions having different dimensional relationships or ratios from each other.

[Short-circuit element 1]

The short-circuiting element 1 to which the present invention is applied includes a first electrode 11 as shown in Figs. 1(A) and (B), a second electrode 12 disposed adjacent to the first electrode 11, and a first fusible conductor 13 The first electrode 11 is supported, and is melted and spread between the first and second electrodes 11 and 12 to short-circuit the first and second electrodes 11 and 12, and the heating element 14 heats the first meltable conductor 13.

The first and second electrodes 11 and 12 or the heat generating body 14 are formed on the same plane by, for example, printing or baking a high melting point metal paste on an insulating substrate such as alumina. Further, the first and second electrodes 11 and 12 or the heat generating body 14 may be formed by being supported by a predetermined position or the like using a mechanical member such as a wire or a plate material made of a high melting point metal.

The first and second electrodes 11 and 12 are arranged in close proximity and open, and the short-circuiting element 1 is activated, and the molten conductor 13a of the first fusible conductor 13 to be described later, as shown in FIG. 2(A) and (B), is condensed and bonded. And the switch 2 short-circuited through the molten conductor 13a. The first and second electrodes 11, 12 are respectively provided with external connection terminals 11a, 12a at one end. The first and second electrodes 11, 12 are connected to the external circuit of the power supply circuit or the digital signal circuit through the external connection terminals 11a, 12a, by short-circuiting the components The action of 1 becomes the bypass current path of the external circuit or the power supply path to the functional circuit.

Further, when one of the first and second electrodes 11, 12 constituted by the mechanical component is supported by the support, the support is preferably an insulating material having a thermal conductivity of 10 W/m‧K or less. The short-circuiting element 1 is in a case where a support supporting one of the first and second electrodes 11 and 12 is housed in a higher alumina ceramic case having a thermal conductivity of 25 W/m ‧ , for example, the first and second electrodes 11 and 12 The heat is released to the alumina ceramic case through the support, and it becomes difficult to heat.

Therefore, by supporting the first and second electrodes 11 and 12 with a support made of an insulating material having a thermal conductivity of 10 W/m‧K or less, the short-circuiting element 1 can be prevented from being transmitted to the first and second electrodes 11, 12 The heat of the heating element 14 is released to the outer casing such as a general-purpose alumina ceramic via the support, and the first meltable conductor 13 is quickly heated and melted. In addition, the thermal conductivity of the support is lower than that of the outer casing, and the heat release from the outer casing can be suppressed. By setting the thermal conductivity to 10 W/m‧K or less, the outer casing of the alumina ceramic can be sufficiently suppressed. In terms of heat release, it is preferable to use a plastic or glass having a maximum thermal conductivity of 2 W/m‧K or less as a support material in terms of heat release suppression.

As the first fusible conductor 13, any metal which is rapidly melted by the heat generation of the heating element 14 can be used, and a low melting point metal such as Sn or a lead-free solder containing Sn as a main component can be preferably used.

Further, the first meltable conductor 13 may also contain a low melting point metal and a high melting point metal. As the low-melting-point metal, solder such as Sn or a lead-free solder containing Sn as a main component is preferably used, and as the high-melting-point metal, Ag, Cu, or an alloy containing the same as the main component is preferably used. When the short-circuiting element 1 is reflowed by containing a high melting point metal and a low melting point metal, even if the reflow temperature exceeds the melting temperature of the low melting point metal layer and the low melting point metal is melted, the low melting point metal can be suppressed from flowing out to the outside. The shape of the first fusible conductor 13 can be maintained. Moreover, at the time of melting, the low melting point metal is also melted, and the high melting point metal is etched (solder eroded), and the temperature below the melting point of the high melting point metal can be used. The degree is quickly blown. Further, the first fusible conductor 13 can be formed in various configurations as will be described later.

The first fusible conductor 13 is formed in a substantially rectangular plate shape, and is connected to the first electrode 11 through a bonding material 15 such as solder for connection. Here, in the short-circuiting element 1 of the present invention, the first meltable conductor 13 protrudes toward the second electrode 12 side and is supported. The first fusible conductor 13 is supported separately from the first and second electrodes 11, 12 before the short-circuiting element 1 is actuated. Further, after the heat generating body 14 generates heat, the first meltable conductor 13 is thermally fused by the heat generating body 14, and the molten conductor 13a is condensed around the first electrode 11, thereby also being disposed adjacent to the first electrode 11 The electrodes 12 are in contact with each other to short-circuit the first and second electrodes 11, 12.

The first soluble conductor 13 is preferably separated from the second electrode 12 and superposed on the second electrode 12 as shown in FIG. 1(B). As a result, the first meltable conductor 13 is brought into contact with the second electrode 12 by tension or gravity after being thermally fused by the heat generating body 14, thereby reliably short-circuiting the first and second electrodes 11, 12.

In addition, the first fusible conductor 13 is coated with the flux 24 (see FIG. 12 and the like) for oxidation prevention, wettability improvement, and the like.

[heating stuff]

The heat generating body 14 that heats and melts the first meltable conductor 13 is a conductive member that generates heat when it is energized, and is made of, for example, a nickel-chromium alloy, W, Mo, Ru, or the like. When the heating element 14 is placed on an insulating substrate, the alloy or the composition, the powder of the compound, the resin binder, and the like are mixed by a screen printing technique to form a paste, and a pattern is formed on the insulating substrate. And formed by firing.

[Insulation]

The heating element 14 is continuous with the first electrode 11 that supports the first soluble conductor 13 through the insulating layer 17. The first electrode 11 can be heated through the insulating layer 17. The insulating layer 17 is provided in order to protect and insulate the heating element 14 and to transfer the heat of the heating element 14 to the first electrode 11 with good efficiency, and is composed of, for example, a glass layer. The first electrode 11 is heated by the heating element 14 to melt the first meltable conductor 13, and the molten conductor 13a can be easily condensed.

Further, one end of the heating element 14 is connected to the heating element drawing electrode 18, and the other end is connected to the heating element electrode 19. The heating element drawing electrode 18 and the heating element electrode 19 are connection electrodes of an external circuit for energizing the heating element 14, and the heating element 14 controls the energization between the heating element drawing electrode 18 and the heating element electrode 19 by an external circuit.

The short-circuiting element 1 can also cause the heating element pull-out electrode 18 to support one end of the first fusible conductor 13. At this time, as shown in FIG. 1 (A) and (B), the short-circuiting element 1 is provided on the side opposite to the first electrode 11 of the second electrode 12 as shown in FIG. 1 (A) and (B), and is disposed across the second electrode 12. 1 fusible conductor 13. The first meltable conductor 13 is supported by the first electrode 11 and the heat generating body pull-out electrode 18. In the short-circuiting element 1, the first electrode 11 and the first meltable conductor 13 constitute one of the energizing paths to the heat generating body 14. Therefore, the short-circuiting element 1 is short-circuited between the first and second electrodes 11 and 12 after the first meltable conductor 13 is melted, that is, between the first electrode 11 and the heating element drawing electrode 18, and the heat is blocked. The energization path of the body 14 thus stops the heat generation. Further, the heating element pulls out the electrode 18, and in order to condense more of the molten conductor 13a on the first electrode 11, it is preferably formed to be narrower than the first electrode 11.

[circuit composition]

The short-circuiting element 1 has the circuit configuration shown in FIG. In other words, the short-circuiting element 1 is insulated from the first and second electrodes 11 and 12 by the first electrode 11 in the state before the operation, and the switch 1 is short-circuited by the melting of the first soluble conductor 13 . First and second electrodes 11, 12, by It is connected in series to the current path of the circuit board on which the short-circuiting element 1 is mounted, and is assembled between various external circuits 28A and 28B such as a power supply circuit.

Further, in the short-circuiting element 1, the heating element 14 is formed to continue from the first electrode 11 through the first fusible conductor 13 and the heating element pulling-out electrode 18, and further to the power supply path 3 of the heating element electrode 19.

The short-circuiting element 1 normally controls the energization of the power supply path 3 by the current control element 32 connected through the heating element electrode 19. The current control element 32 controls the switching element of the power supply path to be connected to the detection circuit 35 which is constituted by, for example, a FET and detects the necessity of physical short circuit of the external circuit in which the short-circuit element 1 is assembled. The detecting circuit 35 detects whether or not a circuit necessary for energizing the various external circuits 28A, 28B (with the short-circuiting element 1 is assembled), for example, a bypass current path at the abnormal voltage of the battery pack, and a network communication device are detected. In the case of a hacker or an intrusion, the construction of the communication number path bypassing the data server, or the activation of the device or the software, etc., is caused by the short circuit of the first and second electrodes 11, 12 to be physically and irreversibly When the current path between the external circuits 28A, 28B is short-circuited, the current control element 32 is operated.

Thereby, the short-circuiting element 1 energizes the power supply path 3 by the current control element 32, and the heating element 14 generates heat. After the heating element 14 is energized through the power supply path 3, as shown in FIG. 2(A) and FIG. 2(B), the first soluble conductor 13 is heated and melted by the heating element 14, and the molten conductor 13a is condensed on the first electrode 11 It is also in contact with the second electrode 12 disposed adjacent to each other. Thereby, in the short-circuiting element 1, the insulated first and second electrodes 11, 12 are short-circuited by the molten conductor 13a, and the external circuits 28A and 28B are connected.

At this time, the short-circuiting element 1 is supported by the first soluble conductor 13 on the second electrode 12 side, or is preferably superposed on the second electrode 12, so that the first fusible conductor 13 is provided. After being melted by the heat of the heat generating body 14, the second electrode 12 is brought into contact with the tension or gravity during the process in which the molten conductor 13a is condensed around the first electrode 11, and the first and second electrodes 11 and 12 can be surely made. Short circuit between.

Further, the short-circuiting element 1 is supported by protruding the first soluble conductor 13 toward the second electrode 12 side, or preferably by being superposed on the second electrode 12, and more preferably supported by the heating element pulling-out electrode 18, For example, when the short-circuiting element 1 is reflowed to the external circuit, it is possible to prevent the first meltable conductor 13 from being biased toward the second electrode 12 side and short-circuiting, or the molten conductor 13a is not condensed on the first electrode 11 and There is a state in which the second electrode 12 is not short-circuited.

Further, after the short-circuiting element 1 is short-circuited between the first and second electrodes 11, 12, the first meltable conductor 13 connecting the first electrode 11 and the heating element drawing electrode 18 is melted. Thereby, in the short-circuiting element 1, the first electrode 11 connected to the first soluble conductor 13 and the heating element drawing electrode 18 are opened, and the power supply path 3 to the heating element 14 is blocked. Therefore, the power supply to the heating element 14 is stopped, and the heat generation of the heating element 14 is stopped. The circuit configuration when the short-circuiting element 1 is operated is shown in FIG.

[fuse sequence]

Here, the short-circuiting element 1 is formed such that the first fusible conductor 13 between the first electrode 11 and the heating element drawing electrode 18 is blown after being short-circuited between the first and second electrodes 11 and 12. The first electrode 11 connected to the first fusible conductor 13 and the heating element drawing electrode 18 constitute the power supply path 3 to the heating element 14, so that the first electrode before the short circuit of the first and second electrodes 11 and 12 When the fuse 11 is blown between the heating element pull-out electrode 18, the power supply to the heating element 14 is stopped, and the first and second electrodes 11 and 12 cannot be short-circuited.

Therefore, the short-circuiting element 1 is formed such that after the heating element 14 generates heat, the first electrode Before the blocking between the 11 and the heating element pull-out electrode 18, the first and second electrodes 11, 12 are short-circuited first. Specifically, in the short-circuiting element 1 , the heating element drawing electrode 18 is disposed at a position separated from the heating element 14 by the first and second electrodes 11 and 12 . Thereby, after the short-circuiting element 1 generates heat, the first electrode 11 can transfer heat faster than the heat-generating body pulls out the electrode 18. When the first meltable conductor 13 supported by the first electrode 11 and protruding toward the second electrode 12 side is melted, the molten conductor 13a can be quickly condensed around the first electrode 11, and the molten conductor 13a can be condensed. The first and second electrodes 11 and 12 can be short-circuited, and then the heating element can be pulled out of the electrode 18.

[Auxiliary Fusible Conductor]

Further, in the short-circuiting element 1, the auxiliary fusible conductor 21 may be connected to the second electrode 12, and the heating element 14 may be connected to the first and second electrodes 11, 12 through the insulating layer 17.

Since the second electrode 12 is also provided with the auxiliary fusible conductor 21, as shown in FIG. 6, the short-circuiting element 1 can be condensed by the respective fused conductors 13a, 21a of the first fusible conductor 13 and the auxiliary fusible conductor 21. The amount of the molten conductor between the first and second electrodes 11 and 12 is increased, and the amount of the molten conductor can be reliably short-circuited. The auxiliary fusible conductor 21 can be formed using the same material as the first fusible conductor 13. Further, the auxiliary fusible conductor 21 can also be formed by various configurations as will be described later. Further, the auxiliary soluble conductor 21 is joined to the second electrode 12 by bonding the bonding material 15 such as solder, similarly to the first soluble conductor 13 .

Further, the auxiliary fusible conductor 21 preferably protrudes from the second electrode 12 toward the first electrode 11 side, and protrudes to a position overlapping with the first electrode 11 and overlapping. Further, the auxiliary fusible conductor 21 is supported to also overlap with the first fusible conductor 13, and the molten conductor 21a of the auxiliary fusible conductor 21 and the molten conductor 13a of the first fusible conductor 13 are more likely to be condensed, which can contribute to Short circuit between the first and second electrodes 11,12.

The second electrode 12 to which the auxiliary soluble conductor 21 is bonded is continuous with the heat generating body 14 through the insulating layer 17 similarly to the first electrode 11. Thereby, the second electrode 12 can transmit the heat of the heat generating body 14 with good efficiency through the insulating layer 17, and the auxiliary soluble conductor 21 can be rapidly melted.

Further, the hollow structure of the second electrode 12 reduces the heat capacity, lowers the specific heat of the material, and increases the thermal conductivity of the material, thereby increasing the temperature increase rate, thereby accelerating the melting of the auxiliary soluble conductor 21, and the first electrode 11 is accelerated. The short circuit between the second electrode 12 and the second electrode 12 is faster than the melting of the first meltable conductor 13, so that the first and second electrodes 11 and 12 can be reliably held before the blocking between the first electrode 11 and the heating element drawing electrode 18. Short circuit between.

[Short Circuit Element 40]

Further, as shown in FIGS. 7(A) and (B), the short-circuiting element of the present invention may be provided with the heating element drawing electrode 18 provided on the opposite side of the first electrode 11 from the heating element 12, and the first fusible conductor 13 may be provided. The cantilever is supported on the second electrode 12. In the description of the short-circuiting element 40, the same members as those of the above-described short-circuiting element 1 will be denoted by the same reference numerals and will not be described in detail.

In the short-circuiting element 40, the first meltable conductor 13 is supported by the second electrode 12, and it is preferably supported so as to overlap the second electrode 12, as shown in Fig. 8(A) and (B). After the molten conductor 13a is melted by the heat generation of the heating element 14, the second electrode 12 is brought into contact by tension or gravity, and the first and second electrodes 11 and 12 are reliably short-circuited.

Further, similarly, in the short-circuiting element 40, it is preferable that the heat generating body pull-out electrode 18 is disposed at a position separated from the heat generating body 14 by the first and second electrodes 11, 12 so as to be at the first and second electrodes 11 After 12 short circuits, the first electrode 11 and the heating element pull-out electrode 18 are blocked.

Further, similarly, the short-circuiting element 40 may be as shown in FIG. 9(A) and FIG. The electrode 12 is connected to the auxiliary soluble conductor 21, and the heating element 14 is continuous with the first and second electrodes 11, 12 through the insulating layer 17. In this case as well, in the short-circuiting element 40, the auxiliary soluble conductor 21 is protruded from the second electrode 12 toward the first electrode 11 side, and preferably protrudes to a position overlapping with the first electrode 11 and overlapping. Further, the auxiliary fusible conductor 21 is supported to also overlap with the first fusible conductor 13, and the molten conductor 21a of the auxiliary fusible conductor 21 and the molten conductor 13a of the first fusible conductor 13 are more likely to be condensed, which can contribute to Short circuit between the first and second electrodes 11,12.

Further, as shown in FIGS. 10 and 11, the short-circuiting elements 1 and 40 may be provided on the opposite side of the first and second electrodes 11 and 12 from the heating element drawing electrode 18, and the first meltable conductor 13 may be supported. The other end of the support electrode 22. In the short-circuiting elements 1, 40, by supporting both ends of the first fusible conductor 13 on the heating element drawing electrode 18 and the supporting electrode 22, it is possible to stably support in a high temperature environment such as reflow soldering. The first fusible conductor 13.

[surface structure type]

Further, the short-circuiting element to which the present invention is applied can be formed on the external circuit board in a surface mountable manner. As shown in FIGS. 12(A) to (C), the short-circuiting element 1 formed in the surface structure forms a heating element 14, a heating element drawing electrode 18, and a heating element electrode 19 on the surface 10a of the insulating substrate 10, and transmits the same. The insulating layer 17 has the first and second electrodes 11 and 12 laminated on the heating element 14. The first meltable conductor 13 is overlapped with the second electrode 12 and connected to the first electrode 11 and the heating element drawing electrode 18. 12(A) is a plan view of the short-circuiting element 1 of the surface-mount type, and FIG. 12(B) is a plan view showing the heat-generating body 14 or the like passing through the short-circuiting element 1, and FIG. 12(C) is FIG. ) A-A' section view.

The insulating substrate 10 is formed into a substantially square shape using an insulating member such as alumina, glass ceramic, mullite, or zirconia. In addition to the insulating substrate 10, a material for a printed wiring board such as a glass epoxy substrate or a phenolic substrate may be used, but it is necessary Attention should be paid to the temperature at which the first fusible conductor 13 is blown.

The heating element 14 can be mixed with an alloy or a composition such as a nickel-chromium alloy, W, Mo, or Ru, a powder of a compound, a resin binder, or the like to form a paste, and a screen printing technique is used on the surface of the insulating substrate 10. A pattern is formed on 10a, and it is formed by baking or the like. Further, the heating element pulls out the electrode 18 and the heating element electrode 19, and a high melting point metal paste such as Ag can be formed on the surface 10a of the insulating substrate 10 by a screen printing technique, and baked.

Further, the heating element 14 has one end connected to the heating element drawing electrode 18 and the other end connected to the heating element electrode 19. The heating element drawing electrode 18 has a layer portion 18a formed on the surface 10a of the insulating substrate 10 and connected to the heating element 14, and a layer portion 18b laminated on the lower layer portion 18a and connected to the first meltable conductor 13. The upper portion 18b of the heating element drawing electrode 18 is formed from the lower layer portion 18a to the insulating layer 17, and the first fusible conductor 13 is connected through the bonding material 15. The heating body electrode 19 is connected to an external connection terminal 19a formed on the back surface 10b of the insulating substrate 10. The heating element 14 is connected to an external circuit through the external connection terminal 19a.

The heating element 14 is covered by the insulating layer 17 on the surface 10a of the insulating substrate 10. The insulating layer 17 is provided to protect and insulate the heating element 14, and is configured to transmit heat of the heating element 14 to the first and second electrodes 11 and 12 with good efficiency, and is formed of, for example, a glass layer. The first and second electrodes 11 and 12 are formed adjacent to the heating element 14 so as to overlap the heating element 14, and the heating element drawing electrode 18 is formed by being separated from the heating element 14. When the first and second electrodes 11 and 12 are heated by the heating element 14, the molten conductor 13a of the first soluble conductor 13 can be easily condensed.

Further, the insulating layer 17 may also be formed between the insulating substrate 10 and the heating element 14. That is, the short-circuiting element 1 can also form the heat generating body 14 inside the insulating layer 17 formed on the surface 10a of the insulating substrate 10.

The first and second electrodes 11, 12 are formed on the insulating layer 17 from the surface 10a of the insulating substrate 10. Further, the first and second electrodes 11, 12 are connected to the external connection terminals 11a, 12a formed on the back surface 10b of the insulating substrate 10. The short-circuiting element 1 is assembled to various external circuits such as a power supply circuit through the external connection terminals 11a and 12a.

Between the first electrode 11 and the heating element drawing electrode 18, a first fusible conductor 13 which is formed in a plate shape across the second electrode 12 is connected. The first soluble conductor 13 is separated from the first and second electrodes 11 and 12 by the insulating layer 23 formed of the glass of the first and second electrodes 11 and 12, and is provided on the first electrode 11 The bonding material 15 such as the bonding solder of the heating element drawing electrode 18 can be electrically connected to the first electrode 11 and the heating element drawing electrode 18. Thereby, the short-circuiting element 1 forms the first electrode 11, the first soluble conductor 13, the heating element drawing electrode 18, the heating element 14, and the power supply path 3 to the heating element 14 of the heating element electrode 19.

Further, the insulating portion 23 is formed by removing one of the opposing portions of the first and second electrodes 11 and 12 which are disposed adjacent to each other. Moreover, the insulating layer 23 is also formed on the heating element drawing electrode 18, and the outflow of the bonding material 15 such as solder for connection or the molten conductor 13a is prevented. Further, the first fusible conductor 13 is coated with the flux 24 for oxidation prevention, wettability improvement, and the like. Further, in the short-circuiting element 1, the surface 10a of the insulating substrate 10 is covered by the covering member 25.

After the heat generating element 14 generates heat, the short-circuiting element 1 heats the first meltable conductor 13 through the insulating layer 17 and the first and second electrodes 11 and 12, and the molten conductor 13a is condensed as shown in Fig. 13 (A) and (B). The second electrode 12 is short-circuited between them. At this time, the short-circuiting element 1 is supported by the first electrode 13 to be superposed on the second electrode 12, and is melted by the heat of the heating element 14, and the molten conductor 13a is in contact with the second electrode 12 due to tension or gravity. It is possible to reliably short-circuit the first and second electrodes 11 and 12. Further, in the short-circuiting element 1, the insulating layer 23 provided on the first and second electrodes 11, 12 Further, the molten conductor 13a stays between the first and second electrodes 11 and 12, and it is possible to prevent the molten conductor 13a from flowing out to the external connection terminals 11a and 12a and affecting the connection state with the external circuit.

Next, as shown in FIG. 14(A) and FIG. 14(B), in the short-circuiting element 1, the first soluble conductor 13 is blown between the first electrode 11 and the heating element drawing electrode 18, and the power supply path to the heating element 14 is blocked. 3 and stop heating.

Here, since the short-circuiting element 1 is disposed at the position where the first and second electrodes 11 and 12 overlap the heating element 14 and the heating element drawing electrode 18 is separated from the heating element 14, the heating element 14 can be heated first. Before the blocking of the power supply path 3 between the electrode 11 and the heating element drawing electrode 18, the first and second electrodes 11, 12 are short-circuited.

Further, as shown in FIG. 12, the short-circuit element 1 may extend the first soluble conductor 13 to the side opposite to the second electrode 12 of the first electrode 11. Thereby, the short-circuiting element 1 can increase the amount of the molten conductor 13a condensed between the first and second electrodes 11 and 12, and can reliably short-circuit it.

Further, the short-circuiting element 1 may be provided with a supporting electrode 22 as shown in FIG. 15(A) and (B) for supporting the end of the first fusible conductor 13 extending on the opposite side of the first electrode 11 from the second electrode 12. . In the short-circuiting element 1, by supporting both ends of the first fusible conductor 13 on the heating element drawing electrode 18 and the supporting electrode 22, it is possible to stably support the first one in a high temperature environment such as reflow soldering. Fusible conductor 13.

Further, the short-circuiting element 40 described above can be similarly formed for surface mounting. As shown in FIG. 16(A) and FIG. 16(B), the short-circuiting element 40 is provided on the insulating layer 17, and the heating element drawing electrode 18 is provided on the opposite side of the first electrode 11 from the second electrode 12, and the first fusible conductor 13 is extended. On the second electrode 12. Further, the short-circuiting element 40 shown in FIG. 16 has the same configuration except for the positions of the short-circuiting element 1 and the first and second electrodes 11, 12 shown in FIG.

Further, similarly, the short-circuiting element 40 can extend the first soluble conductor 13 to the side opposite to the first electrode 11 of the second electrode 12. Thereby, the short-circuiting element 40 can increase the amount of the molten conductor 13a condensed between the first and second electrodes 11 and 12, and can reliably short-circuit it. Further, the short-circuiting element 40 may be provided with a supporting electrode 22 as shown in FIG. 17(A) and (B) for supporting the end of the first fusible conductor 13 extending on the opposite side of the first electrode 11 from the second electrode 12. .

[Short Circuit Element 50]

Further, in the short-circuiting element to which the present invention is applied, the power supply path 3 of the heating element 14 and the first and second electrodes 11, 12 short-circuited by the first soluble conductor 13 may be electrically independent. As shown in FIGS. 18(A) and (B), the short-circuiting element 50 is connected to the heating element drawing electrode 18 at one end of the heating element 14, and the heating element electrode 19 is formed at the other end of the heating element 14 to form a heating element 14. In the power supply path 3, the first soluble conductor 13 is not connected to the heating element drawing electrode 18 and is supported by the first electrode 11. In the description of the short-circuiting element 50, the same members as those of the above-described short-circuiting element 1 will be denoted by the same reference numerals and will not be described in detail.

In the short-circuiting element 50, the first electrode 11 supporting the first meltable conductor 13 is connected to the heat generating body 14 through the insulating layer 17, and the heat of the heat generating body 14 is transmitted with good efficiency, whereby the first meltable conductor 13 can be melted. That is, in the short-circuiting element 50, the heating element 14 is electrically connected to the first electrode 11 and the first meltable conductor 13 independently of each other.

Further, in the short-circuiting element 50, the power feeding path 3 is connected to the external connection terminal 18a provided in the heating element drawing electrode 18, and is connected to a power source formed in the external circuit.

Further, in the short-circuiting element 50, the first meltable conductor 13 is supported by the first electrode 11 protruding toward the second electrode 12, and the first meltable conductor 13 is melted by heating from the heating element 14, and then borrowed. The molten conductor 13a is condensed around the first electrode 11 to contact the second electrode 12, Thereby, the first and second electrodes 11 and 12 are short-circuited.

In the short-circuiting element 50, since the current path between the first and second electrodes 11 and 12 assembled in the external circuit and the power supply path 3 to the heating element 14 that fuses the first soluble conductor 13 are electrically independent, regardless of the external The type of the circuit can set the power supply voltage of the power supply path 3 to be high, and even if the heating element 14 of a low rated value is used, it is possible to supply electric power sufficient to generate sufficient heat amount for melting the first soluble conductor 13. Therefore, the external circuit that short-circuits the first and second electrodes 11 and 12 through the short-circuiting element 50 can be applied to a digital signal circuit that circulates a weak current in addition to the power supply circuit.

Further, according to the short-circuiting element 50, since the current path between the first and second electrodes 11 and 12 assembled to the external circuit electrically forms the power supply path 3 to the heating element 14, the control can be performed on the heating element. The current control element 32 of the power supply of 14 is selected according to the rating of the external circuit, regardless of the rating of the external circuit, by using the current control element 32 of the heating element 14 (for example 1A) that controls the low rating. Can be manufactured cheaper.

[circuit composition]

Next, the circuit configuration of the short-circuiting element 50 will be described. Fig. 19(A) shows a circuit diagram of the short-circuiting element 50. FIG. 20 shows an example of a short circuit 60 to which the short-circuiting element 50 is applied.

In the short-circuiting element 50, the first electrode 11 and the second electrode 12 are open to each other in an initial state, and a switch 2 that is short-circuited by the first soluble conductor 13 is formed, and the first electrode 11 and the first electrode 11 are connected by the switch 2 The first circuit 51 of the 2 electrode 12. The first circuit 51 is connected in series between various external circuits 28A, 28B such as a power supply circuit or a digital signal circuit in which the short-circuiting element 50 is incorporated.

Further, in the short-circuiting element 50, the heating element drawing electrode 18, the heating element 14, and the heating element electrode 19 constitute the power supply path 3 to the heating element 14 in an initial state. Power path 3, Since it is electrically independent of the first circuit 51, the first soluble conductor 13 is melted by the heat of the heating element 14, and therefore is thermally connected to the first circuit 51. One end of the heating element 14 is connected to the current control element 32 for controlling the power supply through the heating element drawing electrode 18. Further, the other end of the heating element 14 is connected to the external power source 53 that supplies power to the heating element 14 through the heating element electrode 19.

The current control element 32 controls a switching element that supplies power to the power supply path 3, and is connected to a detection circuit 35 that is configured by, for example, an FET to detect the physical short circuit of the first circuit 51. The detection circuit 35 detects whether or not a circuit necessary for energizing the various external circuits 28A and 28B (the first circuit 51 in which the short-circuiting element 50 is incorporated) is generated, for example, the bypass current path is constructed when the battery pack is abnormally voltaged. The construction of the communication number path bypassing the hacker or the intrusion in the network communication device, or the activation of the device or the software, etc., is caused by the short circuit of the first circuit 51 to be physically and irreversibly When the current path between the external circuits 28A, 28B is short-circuited, the current control element 32 is operated.

As a result, the heat generating body 14 generates heat by supplying the electric power of the external power source 53 to the power supply path 3, and the first soluble conductor 13 is melted, and the molten conductor 13a is condensed between the first and second electrodes 11 and 12. Thereby, the first electrode 11 and the second electrode 12 are short-circuited by the molten conductor 13a, and the external circuits 28A and 28B are connected.

At this time, in the short-circuiting element 50, since the power supply path 3 to the heating element 14 and the first circuit 51 are electrically formed independently, the heating element 14 can be supplied with power until the first and second electrodes 11 and 12 are short-circuited.

[Auxiliary Fusible Conductor]

Further, as shown in FIG. 21, the short-circuiting element 50 may be connected to the second electrode 12 to the auxiliary soluble conductor 21, and the heating element 14 may be connected to the first and second electrodes 11, 12 through the insulating layer 17. By this, short The channel element 50 can increase the amount of the molten conductor that is condensed between the first and second electrodes 11 and 12 by the respective fused conductors 13a and 21a of the first and second soluble conductors 13 and 21, and can Make sure to short it.

Further, in the short-circuiting element 50, the auxiliary soluble conductor 21 is preferably protruded from the second electrode 12 toward the first electrode 11 side, and protrudes to a position overlapping with the first electrode 11 and overlapping. Further, the auxiliary fusible conductor 21 is supported to also overlap with the first fusible conductor 13, and the molten conductor 21a of the auxiliary fusible conductor 21 and the molten conductor 13a of the first fusible conductor 13 are more likely to be condensed, which can contribute to Short circuit between the first and second electrodes 11,12.

[Short Circuit Element 70]

Further, in the short-circuiting element of the present invention, as shown in Fig. 22, the second fusible conductor 72 may be interposed between the power supply path 3 of the heating element 14. The short-circuiting element 70 includes a heating element power supply electrode 71 disposed adjacent to the heating element drawing electrode 18, and a second fusible conductor 72 spanned between the heating element drawing electrode 18 and the heating element power supply electrode 71. In the description of the short-circuiting element 70, the same members as those of the above-described short-circuiting element 1 will be denoted by the same reference numerals and will not be described in detail. Fig. 19(B) shows a circuit diagram of the short-circuiting member 70.

The heating element power supply electrode 71 is disposed adjacent to the heating element drawing electrode 18, and is connected to the heating element drawing electrode 18 through the second fusible conductor 72, thereby constituting the power supply path 3 to the heating element 14. Further, the insulating layer 17 is connected to an external connection terminal 71a as a connection terminal to an external circuit. The heating element power supply electrode 71 can be formed simultaneously with the formation of the heating element drawing electrode 18 using the same material as the heating element drawing electrode 18.

The second fusible conductor 72 is spanned between the adjacent heat generating body pull-out electrode 18 and the heat generating body power supply electrode 71, and constitutes a circuit for the heat generating body 14 before the short-circuiting element 70 is actuated. One of the trails 3. The second meltable conductor 72 can be formed using the same material as the first meltable conductor 13. Further, the second fusible conductor 72 can also be formed by various configurations as will be described later.

As shown in FIG. 23, the short-circuiting element 70 is provided with the second fusible conductor 72 in the power supply path 3, and after the heat generating body 14 generates heat, the second fusible conductor 72 is melted, and the molten conductor 72a is separately condensed on the heating element pulling-out electrode. 18 and the heating element power supply electrode 71 thereby blocking the power supply path 3 and automatically stopping the heat generation of the heating element 14. At this time, the short-circuiting element 70 is formed such that the second meltable conductor 72 is not melted first than the first meltable conductor 13.

[fuse sequence]

In other words, in the short-circuiting element 70, the heat generating body power supply electrode 71 connected to the first meltable conductor 72 and the heat generating body pull-out electrode 18 constitute the power supply path 3 to the heat generating body 14, so that the first and second electrodes are provided. When the short-circuiting of the heating element supply electrode 71 and the heating element drawing electrode 18 is short-circuited before the short circuit of 11,12, the power supply to the heating element 14 is stopped, and the first and second electrodes 11 and 12 cannot be short-circuited.

Therefore, the short-circuiting element 70 is formed so that the first and second electrodes 11 and 12 are short-circuited before the heat generating body 14 generates heat and before the heat generating body power supply electrode 71 and the heat generating body pull-out electrode 18 are blocked. Specifically, in the short-circuiting element 70, the first meltable conductor 13 is disposed closer to the heat generating body 14 than the second meltable conductor 72. Thereby, after the short-circuiting element 70 generates heat, the first fusible conductor 13 can transmit heat faster than the second fusible conductor 72. Therefore, after the heat generating body 14 generates heat, the first soluble conductor 13 and the molten conductor 13a can be quickly condensed around the first electrode 11, and the molten conductor 13a can short-circuit the first and second electrodes 11 and 12. Thereafter, the second fusible conductor 72 is melted to supply the power supply path 3 to the heating element 14. Therefore, in the short-circuiting element 70, the heating element 14 can be surely supplied with power until the short-circuit between the first and second electrodes 11 and 12.

Further, the short-circuiting element 70 is electrically connected to the first electrode 11 by the heating element feeding electrode 71, and is formed in the same circuit configuration as the short-circuiting element 1, and is separated by function to make the first soluble conductor 13 the first. The short circuit between the second electrodes 11 and 12 causes the second meltable conductor 72 to block the heating element 14, and the sequence of the short circuit and the blocking can be made more reliable in the circuit of the short-circuit element 1.

Further, since the first and second fusible conductors 13, 72 are melted more rapidly as the cross-sectional area is narrower, the cross-sectional area of the first fusible conductor 13 can be formed to be smaller than the cross-sectional area of the second fusible conductor 72. The stenosis is short-circuited between the first and second electrodes 11 and 12 before blocking between the heating element power supply electrode 71 and the heating element drawing electrode 18.

Further, by changing the materials of the first and second fusible conductors 13, 72, the melting point of the second fusible conductor 72 can be relatively higher than the melting point of the first fusible conductor 13, so that the heating element power supply electrode 71 can be used. The first and second electrodes 11, 12 are short-circuited before blocking between the heating element drawing electrodes 18. For example, when the first and second fusible conductors 13, 72 are formed in a laminated structure of a low melting point metal and a high melting point metal, the ratio of the low melting point metal is increased in the first soluble conductor 13 to the second fusible conductor. 72 increases the ratio of the high melting point metal, etc., and can set the melting point difference.

[Auxiliary Fusible Conductor]

Further, as shown in FIG. 24, the short-circuiting element 70 may be connected to the second electrode 12 to the auxiliary fusible conductor 21, and the heating element 14 may be connected to the first and second electrodes 11, 12 through the insulating layer 17. Thereby, the short-circuiting element 70 can increase the amount of the molten conductor that is condensed between the first and second electrodes 11 and 12 by the respective melted conductors 13a and 21a of the first and second soluble conductors 13 and 21. And can be sure to short-circuit it.

In addition, the short-circuiting element 70 is similarly, and the auxiliary fusible conductor 21 is preferably from the first The 2 electrode 12 is protruded toward the first electrode 11 side, and protrudes to a position overlapping with the first electrode 11 and overlapping. Further, the auxiliary fusible conductor 21 is supported to also overlap with the first fusible conductor 13, and the molten conductor 21a of the auxiliary fusible conductor 21 and the molten conductor 13a of the first fusible conductor 13 are more likely to be condensed, which can contribute to Short circuit between the first and second electrodes 11,12.

Further, in the short-circuiting elements 50 and 70, the heating element drawing electrode 18 may be provided on the opposite side of the first electrode 11 from the second electrode 12, or the heating element drawing electrode 18 may be provided in the second electrode 12. The side opposite to the first electrode 11. Further, in either case, the first meltable conductor 13 is cantilevered on the first electrode 11 and protrudes toward the second electrode 12 side, and preferably overlaps. Further, the first fusible conductor 13 may extend beyond the second electrode 12 in either case. Further, in either case, a support electrode that supports the end of the first fusible conductor 13 may be provided.

[Short Circuit Element 80]

Further, the short-circuiting element to which the present invention is applied may be formed for surface mounting, and the supporting area of the first and second electrodes 11, 12 to the first soluble conductor 13 may be expanded to prevent deformation of the first soluble conductor 13 and Prevent initial short circuit.

As shown in FIGS. 25 and 26, the short-circuiting element 80 includes an insulating substrate 10 and a heating element 14; a first insulating layer 81 covering the heating element 14 and having the first and second electrodes 11 and 12 laminated thereon; The insulating layer 82 is laminated on the first and second electrodes 11 and 12 such that the front end portions of the first and second electrodes 11 and 12 face each other; and the heating element pulls out the electrode 18 and 1. The second electrodes 11, 12 are adjacent to each other and electrically connected to the heating element 14. In addition, FIG. 26 is a plan view showing the first fusible conductor 13 of the short-circuiting element 80 removed. In the short-circuiting element 80, the same members as those of the above-described short-circuiting element 1 will be denoted by the same reference numerals and will not be described in detail.

The short-circuiting element 80 is formed with a heating element 14 on the surface 10a of the insulating substrate 10, The heating element pulls out the electrode 18 and the heating element electrode 19, and the first and second electrodes 11 and 12 are laminated on the heating element 14 via the first insulating layer 81. The first insulating layer 81 is provided to protect and insulate the heating element 14 and is provided to transfer the heat of the heating element 14 to the first and second electrodes 11 and 12 with good efficiency, and is formed of, for example, a glass layer. The first and second electrodes 11 and 12 are formed adjacent to the heating element 14 so as to overlap the heating element 14 , and the heating element drawing electrode 18 is formed by being separated from the heating element 14 . When the first and second electrodes 11 and 12 are heated by the heating element 14, the molten conductor 13a of the first soluble conductor 13 can be easily condensed. The heating element drawing electrode 18 has a layer portion 18a formed on the surface 10a of the insulating substrate 10 and connected to the heating element 14, and is connected to the lower layer portion 18a and laminated on the first insulating layer 81 to be connected to the first soluble conductor 13. The upper layer portion 18b.

The first and second electrodes 11 and 12 of the short-circuiting element 80 are widely formed in the longitudinal direction of the rectangular insulating substrate 10, and are formed from both side edges in the width direction of the insulating substrate 10 to the central portion, with a predetermined interval therebetween. to. Further, the first and second electrodes 11, 12 are laminated with the second insulating layer 82 except for the respective distal end portions. Thereby, the front end portions of the first and second electrodes 11 and 12 facing each other are exposed.

In the short-circuiting element 80, the short-circuit lengths of the first and second electrodes 11 and 12 are formed to be long, thereby improving the reliability of the short-circuit and reducing the short-circuit impedance after the short-circuiting of the first and second electrodes 11 and 12, thereby being able to correspond to a high amount. Constant current.

One end of the first fusible conductor 13 is connected to the heating element drawing electrode 18 through a bonding material 15 such as solder for bonding, and the other end is connected to the supporting electrode 83 formed on the first insulating layer 81 through a bonding material 15 such as solder for bonding. Further, the first fusible conductor 13 is supported by the second insulating layer 82 provided on the first and second electrodes 11 and 12, and is electrically connected to the first electrode 11 by a bonding material 15 such as solder for bonding. That is, since the short-circuiting element 80 is widely laminated on the first insulating layer 81, Since the second insulating layers 82 are laminated on the second electrodes 11 and 12 except for the respective end portions of the first and second electrodes 11 and 12, the second insulating layer 82 can be provided from the center of the first soluble conductor 13 The part to the side edge is widely supported.

According to the short-circuiting element 80, it is possible to prevent the first fusible conductor 13 from being bent during the reflow mounting or the like, and to prevent the initial short-circuit between the first and second electrodes 11 and 12 due to the deformation of the first soluble conductor 13. .

In the short-circuiting element 80, the heating element 14 is energized, and after the heat generation starts, as shown in FIG. 27, the heat of the heating element 14 passes through the first insulating layer 81, the first and second electrodes 11, 12, and the second insulating layer 82. It is transferred to the first fusible conductor 13 and starts to melt. At this time, the short-circuiting element 80 is superposed on the first insulating layer 81 by laminating the first and second electrodes 11 and 12 to overlap the heating element 14. Further, since the second insulating layer 82 is widely laminated on the first and second electrodes 11 and 12, and the first soluble conductor 13 is supported by the second insulating layer 82, the heat of the heating element 14 can be transmitted with good efficiency. When the first meltable conductor 13 is heated, the first meltable conductor 13 can be quickly melted on the first and second electrodes 11 and 12, and the first and second electrodes 11 and 12 can be short-circuited.

Further, in the short-circuiting element 80, the first and second electrodes 11 and 12 are overlapped with the heat generating body 14, and the heat generating body pull-out electrode 18 is disposed at a position separated from the heat generating body 14, thereby preventing the first and the first Before the short-circuiting of the two electrodes 11, 12, the heating element pull-out electrode 18 and the first electrode 11 are blown to stop the supply of power to the heating element 14.

After the short-circuiting element 80 is short-circuited by the first and second electrodes 11 and 12, as shown in FIG. 28, the heating element drawing electrode 18 and the first electrode 11 are blown, and the power supply path 3 to the heating element 14 is blocked.

[Full week support]

Further, the short-circuiting element 80 may also laminate the second insulating layer 82 from the first and second electrodes 11 and 12 between the first and second electrodes 11 and 12 to reliably prevent the center of the first soluble conductor 13 The bending of the department. For example, as shown in FIG. 29, the second insulating layer 82 has an opening, and the second insulating layer 82 is laminated in each longitudinal direction of the first and second electrodes 11, 12, and both ends in the longitudinal direction are formed in the width direction. The first and second electrodes are also laminated between the first and second electrodes 11, 12 so that the opposite ends of the first and second electrodes are exposed. The first soluble conductor 13 is mounted to cover the opening of the second insulating layer 82. Therefore, the first fusible conductor 13 can be supported over the entire circumference to prevent bending in the longitudinal direction and the width direction.

Therefore, according to the short-circuiting element 80 shown in FIG. 29, it is possible to reliably prevent the first soluble conductor 13 from being bent during the reflow assembly or the like, and to prevent the first and second electrodes 11 from being deformed by the deformation of the first soluble conductor 13. Short circuit in the initial period of 12 short circuits.

[Short Circuit Element 90]

Further, the short-circuiting element to which the present invention is applied may be formed for surface mounting, and the second electrode 12 may be provided on the covering member.

As shown in FIG. 30, the short-circuiting element 90 includes a covering member 25 that covers the surface of the insulating substrate 10. The second electrode 12 is formed on the top surface portion 25b of the covering member 25 so as to face the first electrode 11. In the short-circuiting element 90, the same members as those of the above-described short-circuiting element 1 will be denoted by the same reference numerals and will not be described in detail.

The cover member 25 has a side wall portion 25a and a top surface portion 25b which are connected to the outer edge portion of the surface 10a of the insulating substrate 10, and can be formed using various engineering plastics or the same material as the insulating substrate 10. The cover member 25 is formed with the second electrode 12 from one of the side wall portions 25a to the top surface portion 25b of the cover member 25.

The second electrode 12 of the short-circuiting element 90 is mounted on the second electrode 12 by the covering member 25 The edge substrate 10 is connected to the external connection electrode 26 formed on the surface 10a of the insulating substrate 10. The external connection electrode 26 is connected to the external connection terminal 26a formed on the back surface 10b of the insulating substrate 10. The short-circuiting element 90 is assembled to various external circuits such as a power supply circuit through the external connection terminal 26a.

Further, the second electrode 12 faces the first electrode 11 laminated on the insulating layer 17, and the first soluble conductor 13 is disposed between the first electrode 11.

In the short-circuiting element 90, after the heat generating element 14 generates heat, as shown in FIG. 31, heat is transferred to the first meltable conductor 13 via the insulating layer 17 and the first electrode 11, and is melted. The molten conductor 13a is condensed on the first electrode 11, and is also condensed on the second electrode 12 disposed opposite to the first electrode 11 on the top surface portion 25b. Thereby, the short-circuiting element 90 can short-circuit the first and second electrodes 11, 12 through the molten conductor 13a. When the short-circuiting element 90 is short-circuited by the first and second electrodes 11 and 12, the heating element pulling-out electrode 18 and the first electrode 11 are melted, and the power supply path 3 to the heating element 14 is blocked.

[Other composition]

Further, in each of the short-circuiting elements 1, 40, 50, 70, 80, and 90 described above, the first fusible conductor 13 formed in a plate shape preferably has an area twice or more the area of connection with the first electrode 11. Thereby, the first soluble conductor 13 can secure the amount of the sufficient molten conductor that short-circuits the first and second electrodes 11 and 12, and is supported at the end portion of the heat generating body pulling electrode 18 or the supporting electrode 22 It can also be quickly blown.

Further, in each of the short-circuiting elements 1, 40, 50, 70, 80, 90 described above, the first fusible conductor 13 may be formed of a wire. In this case, the first fusible conductor 13 preferably has a The length of the connection length of the first electrode 11 is twice or more. Thereby, the first fusible conductor 13 can secure a sufficient amount of the molten conductor that short-circuits the first and second electrodes 11 and 12, and is supported at the end. When the hot body pulls out the electrode 18 or the support electrode 22, it can be quickly melted.

Further, in each of the short-circuiting elements 1, 40, 50, 70, 80, and 90, the interval between the first and second electrodes 11, 12 is preferably the first line on the extension line between the first and second electrodes. The width of the electrode 11 is below. For example, as shown in Fig. 1, in the short-circuiting element 1, the interval W ₁ between the first and second electrodes 11 and 12 is preferably the width W ₂ of the first electrode 11 on the extension line of the first and second electrode intervals. the following. Thereby, the first and second electrodes 11 and 12 are disposed closer to each other, and the second electrode can be more reliably contacted when the molten conductor 13a of the first soluble conductor 13 is condensed around the first electrode 11 12, the molten conductor 13a can be condensed between the first and second electrodes 11, 12.

[Coating treatment]

Further, the first and second electrodes 11, 12 of the short-circuiting elements 1, 40, 50, 70, 80, 90, the heating element drawing electrode 18, the supporting electrode 22, and the heating element power supply electrode 71 may be made of Cu or For forming a general electrode material such as Ag, it is preferable to apply a film such as Ni/Au plating, Ni/Pd plating, or Ni/Pd/Au plating to a surface by a known method such as plating treatment. Thereby, the short-circuiting elements 1, 40, 50, 70, 80, 90 can prevent oxidation of the support electrode 22 and the heating element supply electrode 71, and reliably hold the first and second meltable conductors 13, 72 to fuse the conductor. Further, in the case where the short-circuiting elements 1, 40, 50, 70, 80, 90 are reflow-fitted, the first and second fusible conductors 13, 72 are connected to each other by a bonding material such as solder or the like. The low-melting-point metal of the outer layer of the second fusible conductors 13, 72 is melted, and the first and second electrodes 11, 12, the heating element drawing electrode 18, the supporting electrode 22, and the heating body are prevented from being welded (solder erosion). Electrode 71.

[Location of the heating element]

Further, the surface-mounting type short-circuiting elements 1, 40, 80, 90 may be formed as the heating element 14 on the surface 10a of the insulating substrate 10, as shown in Fig. 32(A), Fig. 33(A), and Fig. 34(A). ), as shown in Figure 35 (A), It is provided on the back surface 10b of the insulating substrate 10. In this case, the heating element 14 is covered by the insulating layer 17 on the back surface 10b of the insulating substrate 10. Further, the heat generating body electrode 19 constituting the power supply path 3 of the heat generating body 14 is similarly formed on the back surface 10b of the insulating substrate 10. In the heating element drawing electrode 18, the layer portion 18a is formed on the back surface 10b of the insulating substrate 10, and the upper portion 18b of the first soluble conductor 13 is formed on the surface 10a of the insulating substrate 10, and the lower layer portion 18a is formed. The upper portion 18b is continuous through the conductive via.

Further, the heating element 14 is preferably formed at a position overlapping the first and second electrodes 11 and 12 on the back surface 10b of the insulating substrate 10. Further, it is preferable that the heating element drawing electrode 18 is provided at a position separated from the heating element 14 by the first and second electrodes 11 and 12.

Further, as shown in FIGS. 32(B), 33(B), 34(B), and 35(B), in the short-circuiting elements 1, 40, 80, and 90, the heat generating body 14 may be formed on the insulating substrate. 10 internal. In this case, it is not necessary to provide the insulating layer 17 covering the heating element 14. Further, in the heat generating body electrode 19 to which one end of the heat generating body 14 is connected, one end portion connected to the heat generating body 14 is formed inside the insulating substrate 10, and is connected to the external connection terminal 19a provided on the back surface 10b of the insulating substrate 10 through the conductive via hole. In the heating element drawing electrode 18, the layer portion 18a is formed in the insulating substrate 10 under the connection with the heating element 14, and the layer portion 18b on which the first fusible conductor 13 is mounted passes through the conductive via hole and is continuous.

Further, the heating element 14 is preferably formed at a position overlapping the first and second electrodes 11 and 12 in the inside of the insulating substrate 10. Further, it is preferable that the heating element drawing electrode 18 is provided at a position separated from the heating element 17 by the first and second electrodes 11 and 12.

In the short-circuiting elements 1, 40, 80, 90, the heat generating body 14 is formed on the back surface 10b of the insulating substrate 10 or the inside of the insulating substrate 10, whereby the surface 10a of the insulating substrate 10 can be planarized, whereby the first surface can be made The second electrodes 11, 12 and the heating element pull-out electrode 18 are formed on the surface 10a. Therefore, the short-circuiting elements 1, 40, 80, and 90 can simplify the processes of the first and second electrodes 11, 12 and the heating element drawing electrode 18, and achieve a low height.

Further, in the case where the short-circuiting elements 1, 40, 80, and 90 are formed on the back surface 10b of the insulating substrate 10 or the inside of the insulating substrate 10, it is also possible to use a material having excellent thermal conductivity such as precision ceramics as insulation. The material of the substrate 10 can be heated and melted by the heat-generating body 14 in the same manner as the laminated body 10a on the surface 10a of the insulating substrate 10.

[Composition of fusible conductor]

As described above, the first and second fusible conductors 13, 72 and the auxiliary soluble conductor 21 may also contain a low melting point metal and a high melting point metal. In addition, in the following description, the first and second fusible conductors 13, 72 and the auxiliary fusible conductor 21 are collectively referred to as "fusible conductors 13, 72, 21" except for the case where special distinction is necessary. As the low-melting-point metal, a solder such as a lead-free solder containing Sn as a main component is preferably used, and as the high-melting-point metal, Ag, Cu, or an alloy containing the same as a main component is preferably used. At this time, as shown in Fig. 36(A), the fusible conductors 13, 72, 21 can be made of a fusible conductor having a high melting point metal layer 91 as an inner layer and a low melting point metal layer 92 as an outer layer. In this case, the fusible conductors 13, 72, 21 may be formed such that the high-melting-point metal layer 91 is entirely covered by the low-melting-point metal layer 92, or may be covered except that one of the opposite sides is covered. The coating structure of the high melting point metal layer 91 and the low melting point metal layer 92 can be formed by a known film forming technique such as plating.

Further, as shown in Fig. 36(B), the fusible conductors 13, 72, 21 also use a fusible conductor having a low-melting-point metal layer 92 as an inner layer and a high-melting-point metal layer 91 as an outer layer. In this case, the fusible conductors 13, 72, 21 may be formed such that the low-melting-point metal layer 92 is entirely covered by the high-melting-point metal layer 91, or may be covered except that one of the opposite sides is covered.

Moreover, the fusible conductors 13, 72, 21 can also be formed as a laminate with high melting as shown in FIG. A layered structure of the point metal layer 91 and the low melting point metal layer 92.

In this case, as shown in FIG. 37(A), the fusible conductors 13, 72, 21 are formed by being mounted on the first and second electrodes 11, 12, or the heating element drawing electrode 18, the supporting electrode 22, and the like. The two-layer structure formed by the upper layer on the lower layer may be used as the upper layer of the low-melting-point metal layer 92 as the lower layer of the high-melting-point metal layer 91 as the lower layer, or vice versa. The layer is laminated as the upper layer of the high melting point metal layer 91. Alternatively, the fusible conductors 13, 72, 21 may be formed as a three-layer structure composed of an inner layer and an outer layer laminated on the upper and lower layers of the inner layer as shown in Fig. 37(B), and may be used as a high melting point of the inner layer. The lower surface layer of the metal layer 91 serves as the outer layer of the low melting point metal layer 92, and conversely, the lower layer of the low melting point metal layer 92 as the inner layer as the outer layer of the high melting point metal layer 91.

Further, as shown in FIG. 38, the fusible conductors 13, 72, 21 may have a multilayer structure in which four or more layers of the high-melting-point metal layer 91 and the low-melting-point metal layer 92 are alternately laminated. In this case, the fusible conductors 13, 72, 21 may also be constructed to be covered by a metal layer constituting the outermost layer or covered except for a pair of opposite sides.

Further, the fusible conductors 13, 72, 21 may also partially deposit the high-melting-point metal layer 91 in a strip shape on the surface of the low-melting-point metal layer 92 constituting the inner layer. Figure 39 is a plan view of the fusible conductors 13, 72, 21.

The fusible conductors 13, 72, 21 shown in FIG. 39(A) are formed by forming a plurality of linear high-melting-point metal layers 91 in the longitudinal direction at a predetermined interval in the width direction on the surface of the low-melting-point metal layer 92. A linear opening 93 is formed along the longitudinal direction, and the low-melting-point metal layer 92 is exposed from the opening 93. The fusible conductors 13, 72, 21 are exposed from the opening portion 93 by the low-melting-point metal layer 92, and the contact area between the molten low-melting metal and the high-melting-point metal is increased, and the high melting point gold can be further promoted. The erosion of the genus layer 91 enhances the fusibility. The opening portion 93 can be formed by, for example, plating a portion of the metal forming the high melting point metal layer 91 on the low melting point metal layer 92.

Further, as shown in Fig. 39 (B), the fusible conductors 13, 72, 21 may be formed on the surface of the low-melting-point metal layer 92 by forming a plurality of linear high-melting-point metal layers 91 in the width direction at predetermined intervals in the longitudinal direction. Thereby, the linear opening portion 93 is formed along the width direction.

Further, as shown in FIG. 40, the fusible conductors 13, 72, 21 may form a high-melting-point metal layer 91 on the surface of the low-melting-point metal layer 92 and form a circular opening 94 in the high-melting-point metal layer 91. The portion 94 exposes the low melting point metal layer 92. The opening portion 94 can be formed by, for example, applying a partial plating of a metal constituting the high melting point metal layer 91 to the low melting point metal layer 92.

The fusible conductors 13, 72, 21 are exposed from the opening portion 94 by the low-melting-point metal layer 92, and the contact area between the molten low-melting metal and the high-melting-point metal is increased, which further promotes the erosion of the high-melting-point metal and enhances the fusibility. .

Further, as shown in FIG. 41, the fusible conductors 13, 72, 21 may form a plurality of openings 95 in the high-melting-point metal layer 91 as an inner layer, and the high-melting-point metal layer 91 may be formed by plating or the like. The low melting point metal layer 92 is filled in the opening portion 95. Thereby, in the fusible conductors 13, 72, 21, since the area of the molten low melting point metal contacting the high melting point metal is increased, the high melting point metal can be eroded by the low melting point metal in a shorter time.

Further, the fusible conductors 13, 72, 21 preferably have a volume of the low-melting-point metal layer 92 formed to be bulky of the higher-melting-point metal layer 91. The fusible conductors 13, 72, 21 are heated by the heat generation of the heating element 14, and the high melting point metal is melted by the melting of the low melting point metal, whereby the melting and melting can be rapidly melted. Therefore, the fusible conductors 13, 72, 21 can promote the dissolution by rapidly forming the volume of the low-melting-point metal layer 92 into a volume of the higher-melting-point metal layer 91, and quickly make the first The second electrodes 11, 12 are short-circuited.

Further, as shown in FIG. 42, the fusible conductors 13, 72, 21 may be formed in a substantially rectangular plate shape and covered with a high melting point metal constituting the outer layer, and formed to be thicker than the main surface portions 13b, 72b, and 21b. The pair of first side edge portions 13c, 72c, 21c and the low melting point metal constituting the inner layer are exposed and formed to face the pair of second side edge portions 13d which are thinner than the first side edge portions 13c, 72c, 21c. , 72d, 21d.

The first side edge portions 13c, 72c, and 21c are covered with the high melting point metal layer 91, and are formed thicker than the main surface portions 13b, 72b, and 21b of the fusible conductors 13, 72, and 21. The second side edge portions 13d, 72d, and 21d are exposed on the side surface with a low-melting-point metal layer 92 whose outer periphery is surrounded by the high-melting-point metal layer 91. The second side edge portions 13d, 72d, and 21d are formed to have the same thickness as the main surface portions 13b, 72b, and 21b except for the both end portions adjacent to the first side edge portions 13c, 72c, and 21c.

As shown in FIG. 43, the first side edge portion 13c is connected to the first and second electrodes 11 and 12 and pulls the electrode 18 and the supporting electrode 83 along the heating element. The second side edge portion 13d is connected to the second insulating layer 82 formed on the first and second electrodes 11, 12 in a direction opposite thereto.

By this means, the short-circuiting element 1 can reliably prevent the first fusible conductor 13 from being bent during the reflow molding or the like, and prevent the initial stage of short-circuiting between the first and second electrodes 11 and 12 due to the deformation of the first soluble conductor 13. Short circuit. Further, after the short-circuiting element 1 generates heat, the first meltable conductor 13 can be rapidly melted and condensed on the first and second electrodes 11 and 12 to be short-circuited.

In other words, since the first side edge portion 13c is covered with the high melting point metal and the low melting point metal layer 92 is not exposed, it is difficult to exhibit the etching action, and it takes a lot of heat to be melted. Therefore, even if the first meltable conductor 13 is heated by the reflow soldering or the like, the first electrode 11 and the first electrode The electrodes 12 are also less likely to be bent, and it is possible to prevent an initial short circuit between the first and second electrodes 11 and 12 caused by the first and second electrodes 11 and 12 being bent due to the bending.

Further, the second side edge portion 13d is formed to be relatively thinner than the first side edge portion 13c. Further, a low-melting-point metal layer 92 constituting the inner layer is exposed on the side surface of the second side edge portion 13d. Thereby, the second side edge portion 13d exerts an erosive action on the high melting point metal layer 91 due to the low melting point metal layer 92, and the thickness of the etched high melting point metal layer 91 is also formed to be thinner than the first side edge portion 13c. Thereby, the first side edge portion 13c formed thicker by the high-melting-point metal layer 91 can be rapidly melted with less heat.

Therefore, the short-circuiting element 1 generates heat by the heat generating element 14, and the first electrode 11 and the second electrode 12 which are opposed to each other by the second side edge portion 13d are rapidly melted, and the molten conductor is condensed and bonded to the first and second portions. On the electrodes 11, 12. Thereby, in the short-circuiting element 1, the first and second electrodes 11, 12 are short-circuited.

Further, as shown in FIG. 44, the second meltable conductor 72 configured as described above is disposed on the heat generating body pull-out electrode 18 and the heat generating body power supply electrode 71 by the first side edge portion 72c covered with the high melting point metal. Between the time required for the melting, the time required for the first meltable conductor 13 to be melted to short-circuit the first and second electrodes 11 and 12 is prevented, and the power supply path 3 is prevented from being blocked before the short circuit. .

Further, in the short-circuiting elements 1, 40, 50, and 70 which are not provided with the auxiliary fusible conductor 21, the heating element 14 may be connected to the first and second electrodes 11, 12 in the same manner. For example, as shown in FIG. 44, in the short-circuiting element 70, by heating the heating element 14 to the second electrode 12, the first soluble conductor 13 can be wetted with good efficiency, and the molten conductor can be condensed in the first and the first. The two electrodes 11, 12 are short-circuited.

The fusible conductors 13, 72, 21 having such a configuration are produced by covering a low-melting-point metal foil constituting the low-melting-point metal layer 92 with a metal such as Ag constituting the high-melting-point metal layer 91. As a method of covering the low-melting-point metal layer foil with a high-melting-point metal, there is an electroplating method capable of continuously applying a high-melting-point metal plating to the elongated low-melting-point metal foil, which is advantageous in terms of work efficiency and manufacturing cost.

After the high melting point metal plating is applied by electroplating, the electric field strength of the edge portion of the elongated low melting point metal foil, that is, the side edge portion is relatively increased, and the high melting point metal layer 91 is plated thickly (see FIG. 42). Thereby, an elongated strip conductor 96 having a thick side edge portion formed by the high melting point metal layer is formed. Then, the conductor strips 96 are cut into a predetermined length in the width direction (C-C' direction in Fig. 42) orthogonal to the longitudinal direction to manufacture the fusible conductors 13, 72, 21. Thereby, in the fusible conductors 13, 72, 21, the side edge portions of the conductor strips 96 become the first side edge portions 13c, 72c, 21c, and the cut surface of the conductor strip 96 becomes the second side edge portions 13d, 72d, 21d. . Further, the first side edge portions 13c, 72c, and 21c are covered with a high melting point metal, and the second side edge portions 13d, 72d, and 21d are a pair of upper and lower high melting point metal layers in the end surface (the cut surface of the conductor strip 96). The low-melting-point metal layer 92 sandwiched between the 91 and the high-melting-point metal layer 91 is exposed to the outside.

1‧‧‧Short-circuit components

2‧‧‧Switch

11‧‧‧1st electrode

11a‧‧‧External connection terminal

12‧‧‧2nd electrode

12a‧‧‧External connection terminal

13‧‧‧1st fusible conductor

14‧‧‧heating body

15‧‧‧Material

17‧‧‧Insulation

18‧‧‧Feature body pull-out electrode

19‧‧‧Heating body electrode

Claims (27)

A short-circuiting element includes: a first electrode; a second electrode disposed adjacent to the first electrode; and a first meltable conductor supported by the first electrode and fused to the first and second electrodes by melting The first and second electrodes are short-circuited, and the heating element heats the first meltable conductor; the first meltable conductor protrudes toward the second electrode side and is supported. The short-circuiting element according to claim 1, wherein the first meltable conductive system is separated from the second electrode and overlaps the second electrode. The short-circuiting element according to claim 1 or 2, wherein the heat is provided on the opposite side of the second electrode from the first electrode or on the side opposite to the second electrode of the first electrode The heating element of the body is electrically connected to pull out the electrode; and the one end of the first fusible conductor is supported by the heating element drawing electrode to form a feeding path for supplying power to the heating element via the first electrode and the first fusible conductor. The short-circuiting element of claim 3, wherein the first electrode and the heating element are pulled out by short-circuiting between the first and second electrodes by the molten conductor of the first fusible conductor Between the electrodes. The short-circuiting element of claim 4, wherein the heating element drawing electrode is disposed at a position separated from the heating element by the first and second electrodes. The short-circuiting element according to claim 1 or 2, wherein the second electrode is opposite to the first electrode or the first electrode is opposite to the second electrode a heating element drawing electrode electrically connected to the heating element; the heating element drawing electrode, and electrically connecting the first and second electrodes and the first fusible conductor to the heating path of the heating element . A short-circuiting element according to claim 6, comprising: a heating element power supply electrode disposed adjacent to the heating element drawing electrode; and a second span between the heating element drawing electrode and the heating element power supply electrode Fusible conductor. The short-circuiting element according to claim 7, wherein the second fusible element is melted and the first and second electrodes are short-circuited by the molten conductor of the first fusible conductor, and the second fusible The conductor is melted to block the heating element pull-out electrode and the heating element supply electrode. The short-circuiting element of claim 8, wherein the first fusible conductor is disposed closer to the heat generating body than the second meltable conductor. The short-circuiting element of claim 8, wherein the first fusible conductor is formed to have a smaller cross-sectional area than the second fusible conductor. The short-circuiting element of claim 8, wherein the first meltable conductor has a lower melting point than the second meltable conductor. The short-circuiting element according to the third aspect of the invention, wherein the first and second electrodes are provided on the opposite side of the heat-generating body pull-out electrode, and a support electrode that supports the other end of the first meltable conductor is provided. The short-circuiting element according to claim 1 or 2, wherein the heat generating body is continuous with the first electrode or the first electrode and the second electrode through an insulating layer. The short-circuiting component of claim 13, wherein the auxiliary electrode is connected to the second electrode; The heat generating body is also continuous with the second electrode through the insulating layer. The short-circuiting element according to claim 1 or 2, wherein one of the first and/or second electrodes is supported by a support made of an insulating material having a thermal conductivity of 10 W/m‧K or less. The short-circuiting element according to claim 1 or 2, comprising: an insulating substrate provided with the heat generating body; a first insulating layer covering the heat generating body and laminating the first and second electrodes; and a second insulating layer; The first and second electrodes are laminated so that the front end portions of the first and second electrodes face each other; and the heating element pulls out the electrodes adjacent to the first and second electrodes, and The heat generating body is electrically connected; the first meltable conductive system is supported by the second insulating layer, and one end is connected to the heat generating body drawing electrode, and the other end is connected to the first electrode. The short-circuiting element of claim 16, wherein the second insulating layer has an opening that exposes each of the front end portions of the first and second electrodes, and the first soluble conductor is mounted to cover the first 2 The above opening of the insulating layer. A short-circuiting element according to claim 1 or 2, comprising: a covering member; wherein the second electrode is formed on a top surface portion of the covering member opposite to the first electrode. The short-circuiting element according to claim 1 or 2, wherein the first meltable conductive system Sn or an alloy containing Sn as a main component or an alloy containing Pb or Pb as a main component. The short-circuiting element according to claim 1 or 2, wherein the first meltable conductive system is laminated with a composite material of a low melting point metal and a high melting point metal. The short-circuiting element according to claim 7, wherein the second fusible conductive system Sn or an alloy containing Sn as a main component or an alloy containing Pb or Pb as a main component. The short-circuiting element of claim 7, wherein the second fusible guiding system is laminated with a composite material of a low melting point metal and a high melting point metal. The short-circuiting element according to claim 20, wherein the low-melting-point metal Sn or an alloy containing 40% or more of Sn, the high-melting-point metal is Ag, Cu, or an alloy containing Ag or Cu as a main component. The short-circuiting element according to claim 22, wherein the low-melting-point metal Sn or an alloy containing 40% or more of Sn, the high-melting-point metal is Ag, Cu, or an alloy containing Ag or Cu as a main component. The short-circuiting element according to claim 1 or 2, wherein the first fusible conductor is formed in a plate shape and has an area twice or more than a connection area with the first electrode. The short-circuiting element according to claim 1 or 2, wherein the first fusible conductor has a linear shape and has a length twice or more the length of connection with the first electrode. The short-circuiting element according to claim 1 or 2, wherein the interval between the first electrode and the second electrode is equal to or smaller than a width of the first electrode on an extension line of the first and second electrode intervals.