KR20160042817A - Switch circuit and switch control method using same - Google Patents

Abstract

And provides a switch circuit which reversibly performs switching control. The first usable conductor 14 and the first heating element 14 for melting the first usable conductor 14 are melted by heating the first heating element 15 to melt the first usable conductor 14, And a second heating element (25) for melting the second usable conductor (24), wherein the second heating element (25) is disposed between the second usable conductor (24) An opening 20 for melting the second usable conductor 24 by heating the heating element 25 and opening between the energizing electrodes and a first current control element 13 for controlling the feeding to the first heating element 15 And a second current control element 23 for controlling the power supply to the second heating element 25. The open electrode of the short circuit part 10 and the energizing electrode of the open part 20 are connected in series.

Description

TECHNICAL FIELD [0001] The present invention relates to a switch circuit and a switch control method using the switch circuit.

The present invention relates to a switch circuit having a short circuit for short-circuiting between open electrodes and an open circuit for opening between the energizing electrodes, and switching the entire circuit to the energized state or the disconnected state, and a switch control method using the same. This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2013-171667, filed on August 21, 2013, the entirety of which is incorporated herein by reference.

In the activation of various devices and software, a serial ID attached to a device or a software package, data of a computer unique value such as hardware information or IP address of a computer are combined and transmitted to the maker, This is done by inputting a "protection release key" which can be used only in combination with the serial ID and computer that is transmitted from the software.

By performing the activation, various devices and software can be used, or limited functions become effective. Further, depending on the license conditions, for example, after a certain period of time has passed or after a predetermined number of times of use, the functions of various devices and software are limited.

The switching between on and off of a series of functions accompanying this kind of activation is generally controlled by software.

Japanese Laid-Open Patent Publication No. 2010-003665

However, in function control by software, there is a risk that unauthorized copying, hacking, cracking, and the like cause illegal switching of functions on and off.

It is therefore an object of the present invention to provide a switch circuit capable of performing switching control inevitably and capable of effectively countering illegal use, and a switch control method using the switch circuit.

In order to solve the above-described problems, a switch circuit according to the present invention comprises a first usable conductor and a first heat generating element for melting the first usable conductor, and by heating the first usable conductor, And a second heating element for melting the second usable conductor, wherein the second heating element comprises a shorting part which melts and shorts between the open electrodes by the molten conductor, a second usable conductor disposed between the energizing electrodes, A first current control element for controlling the power supply to the first heating element, and a second current control element for controlling the feeding of the second heating element to the second heating element The second current control element, and the open electrode of the shorting portion and the energizing electrode of the opening portion are connected in series.

The switch circuit according to the present invention comprises a first usable conductor and a first heating element for melting the first usable conductor, wherein the first usable conductor is heated by heating the first usable conductor, And a second heating element for melting the second usable conductor, wherein the second heating element is heated by heating the second heating element, A first current control element for controlling the feeding to the first heating element, and a second current control element for controlling the feeding to the second heating element And the open electrode of the shorting part and the energizing electrode of the opening part are connected in parallel.

The switch control method according to the present invention includes a first usable conductor and a first heating element for melting the first usable conductor, wherein the first usable conductor is heated by heating the first usable conductor, And a second heating element for melting the second usable conductor, wherein the second heating element comprises a short circuit part for shorting between the open electrodes by a conductor, a second usable conductor disposed between the energizing electrodes, and a second heating element for melting the second usable conductor, A first current control element for controlling the feeding to the first heating element, and a second current control element for controlling the feeding to the second heating element, Wherein the open electrode of the shorting portion and the energizing electrode of the opening portion are connected in series, and the first current control element The open circuit is short-circuited, the entire circuit is switched from the cutoff state to the energized state, the second current control element opens the energizing electrode between the openings, and the entire circuit is switched from the energized state to the cutoff state .

The switch control method according to the present invention includes a first usable conductor and a first heating element for melting the first usable conductor, wherein the first usable conductor is heated by heating the first usable conductor, And a second heating element for melting the second usable conductor, wherein the second heating element comprises a short circuit part for shorting between the open electrodes by a conductor, a second usable conductor disposed between the energizing electrodes, and a second heating element for melting the second usable conductor, A first current control element for controlling the feeding to the first heating element, and a second current control element for controlling the feeding to the second heating element, And the open electrode of the shorting part and the energizing electrode of the opening part are connected in parallel, and the second current control element The open circuit between the open electrodes of the short circuit portion is short-circuited by the first current control element, the entire circuit is switched from the cutoff state to the energized state .

According to the present invention, by energizing and blocking the entire circuit by melting the first and second usable conductors, on / off of the circuit function can be physically and irreversibly controlled. Accordingly, unlike the case where the function is controlled to be turned on and off by the software, the vulnerability to illegal use by illegal copying, hacking, cracking, etc. can be improved.

1 is a block diagram showing a configuration of a first switch circuit to which the present invention is applied.
2 is a circuit diagram showing the configuration of the first switch circuit.
Fig. 3 is a circuit diagram showing a first switch circuit that is energized by a short-circuited portion. Fig.
4 is a circuit diagram showing a first switch circuit which is cut off by an opening portion.
5 is a circuit diagram showing another configuration of the first switch circuit.
6 is a block diagram showing a configuration of a second switch circuit to which the present invention is applied.
7 is a circuit diagram showing a configuration of the second switch circuit.
Fig. 8 is a circuit diagram showing a second switch circuit which is cut off by the opening portion. Fig.
Fig. 9 is a circuit diagram showing a second switch circuit turned on by a short-circuited part. Fig.
10 is a circuit diagram showing another configuration of the first switch circuit.
11 is a diagram showing a configuration example of a short-circuit element, wherein (A) is a plan view and (B) is a sectional view.
Fig. 12 is a diagram showing a short-circuit element in which a usable conductor is melted and short-circuited. Fig. 12 (A) is a plan view and Fig. 12 (B) is a cross-sectional view.
Fig. 13 is a diagram showing an example of the configuration of an open element, and Fig. 13 (A) is a plan view and Fig. 13 (B) is a sectional view.
Fig. 14 is a diagram showing an open element in which a usable conductor is melted and short-circuited, and Fig. 14 (A) is a plan view and Fig. 14 (B) is a sectional view.

Hereinafter, a switch circuit to which the present invention is applied and a switch control method using the same will be described in detail with reference to the drawings. It is needless to say that the present invention is not limited to the following embodiments, but may be modified in various ways within the scope not departing from the gist of the present invention. Also, the drawings are schematic, and the ratios of the dimensions and the like may be different from those of the real world. The specific dimensions and the like should be judged based on the following description. Needless to say, the drawings also include portions where the relationship and the ratio of the dimensions are different from each other.

The first switch circuit (1) to which the present invention is applied switches the function of the device from the off state to the on state and then to the off state again. Further, the second switch circuit 2 to which the present invention is applied changes the function of the device from the on state to the off state, and switches the device function to the on state again. The first and second switch circuits 1 and 2 each have a short circuit portion for short-circuiting between the open electrodes and an open portion for opening between the power supply electrodes. The short circuit portion and the open portion are connected in series or in parallel . The short-circuit portion and the open portion of the first and second switch circuits 1 and 2 physically short-circuit the open electrodes or open the openings between the power-supply electrodes by blowing the usable conductors. Therefore, the first and second switch circuits 1 and 2 can irreversibly switch the functions of the application. Hereinafter, this will be described in detail.

[First Switch Circuit]

1, the first switch circuit 1 includes a short circuit portion 10 for short-circuiting between the first and second open electrodes 11 and 12 and a short circuit portion 10 for short-circuiting between the first and second open electrodes 11 and 12, And the short circuit portion 10 and the open portion 20 are connected in series. The first switch circuit 1 is configured such that the open portion 20 is connected to the power source 3 of the device whose function is turned on and off by the first switch circuit 1, And is connected to the functional circuit 4 of the device. The first switch circuit 1 includes a first current control element 13 that receives a short-circuit signal and controls the current so that the short circuit portion 10 is short-circuited between the first and second open electrodes 11 and 12, And a second current control element 23 for receiving the open signal and controlling the open portion 20 to open between the first and second energizing electrodes 21 and 22.

Specifically, as shown in Fig. 2, the first switch circuit 1 includes a short-circuit element 10A constituting the short-circuit part 10 and an open element 20A constituting the open- And the like.

[Shorting device]

The short circuit element 10A includes first and second open electrodes 11 and 12 which are opened at an initial stage, a first usable conductor 14 and a first heating element 14 for melting the first usable conductor 14 15). The short circuit element 10A is formed by melting the first usable conductor 14 by heating the first heat generating element 15 and causing the first and second open electrodes 11 and 12 to short- (16). The shorting element 10A is connected to the first opening electrode 11 and the second opening electrode 22 of the device 20A and the functional circuit 4 of the device, Respectively.

The first usable conductor 14 has one end connected to the first open electrode 11 and the other end connected to the first heating element 15. [ The first heating element 15 is connected to the first current control element 13 via the heating element electrode 17. [ The first current control element 13 controls the power supply to the first heating element 15 and is constituted by, for example, a field effect transistor (hereinafter referred to as FET) It works according to the signal.

The first heating element 14 and the first heating element 15 are connected in series and the first heating element 14 is connected to the first heating element 14 via the first usable conductor 14 when the first current control element 13 is activated. 15). When the first heating element 15 generates heat, the first usable conductor 14 is melted and the first and second open electrodes 11 and 12 are short-circuited by the molten conductor. Thus, the switch 16 is turned on, the power of the power source 3 is supplied to the functional circuit 4, and the function of the device is turned on. Further, by melting the first usable conductor 14, the feed path to the first heating element 15 is cut off, and the heating of the first heating element 15 is stopped.

[Open Device]

The open element 20A includes a second usable conductor 24 disposed between the energizing electrodes 21 and 22 and a second heating element 25 for melting the second usable conductor 24, (25) is heated to melt the second usable conductor (24) and open the space between the first and second energizing electrodes (21, 22). The open element 20A is connected such that the first energizing electrode 21 is connected to the power source 3 of the device and the second energizing electrode 22 is connected to the first open electrode 11 of the short- .

The second usable conductor 24 is disposed between the first energizing electrode 21 and the second energizing electrode 22. The open element 20A is thereby energized between the first and second energizing electrodes 21 and 22. [ The second heating element 25 has one end connected to the power source 3 via the second usable conductor 24 and the other end connected to the second current control element 23 via the heating element electrode 26 . The second current control element 23 controls the power supply to the second heating element 25 and is constituted by, for example, an FET and operates in accordance with a signal from a detection circuit (not shown).

When the second current control element 23 is operated, the power is supplied from the power source 3 to the two heating elements 25 via the second usable conductor 24. As the second heating element 15 generates heat, the second usable conductor 24 is fused and the first and second energizing electrodes 21 and 22 are opened. As a result, the power supply path from the power source 3 to the functional circuit 4 is cut off, and the function of the device is turned off. Further, as the second usable conductor 24 is melted, the feed path to the second heating element 25 is cut off and the heating of the second heating element 25 is stopped.

[First Switch Control Method]

The first switch circuit 1 is initially opened between the first and second open electrodes 11 and 12 of the short circuit part 10 as shown in Fig. 1 and the second energizing electrodes 21, 22 are short-circuited via the second usable conductors 24. The first switch circuit 1 stops supplying power to the first and second heating elements 15 and 25 by the first and second current control elements 13 and 23. [ As a result, the first switch circuit 1 is cut off from the power supply path to the functional circuit 4 from the power supply 3, and some or all of the functions of the device are disabled.

When activating the device, first, a short circuit signal is supplied from the detection circuit to the first current control element 13, and the first current control element 13 operates. Then, the power of the power source 3 is supplied to the first heating element 15, and the first heating element 15 starts to generate heat. The first usable conductor 14 is fused by the heat of the first heating element 15 being transferred.

As a result, as shown in Fig. 3, the first and second open electrodes 11 and 12, in which the molten conductor of the first usable conductor 14 is opened, are short-circuited and the switch 16 is turned on , The feed path to the functional circuit 4 from the power supply 3 is connected, and the function of the device becomes usable. Further, by melting the first usable conductor 14, the feed path to the first heating element 15 is cut off, and the heating of the first heating element 15 is stopped.

When it becomes necessary to limit the functions of the device or the software in accordance with the license conditions, for example, after a predetermined period has elapsed, after a predetermined number of times of use, or when the device is discarded, the second current control device 23 ) Is supplied with an open signal from the detection circuit, and the second current control element 23 is activated. Then, the power of the power source 3 is supplied to the second heating element 25, and the second heating element 25 starts to generate heat. The second usable conductor 24 is fused by transferring the heat of the second heating element 15.

As a result, as shown in Fig. 4, the first and second energizing electrodes 21 and 22 short-circuited by the second usable conductor 24 are cut off, and the functional circuit 4 is disconnected from the power supply 3, So that the function of the device becomes unusable. Further, the second usable conductor 24 is melted, the feed path to the second heating element 25 is cut off, and the heat generation of the second heating element 25 is stopped.

As described above, according to the first switch circuit 1, the first and second usable conductors 14 and 24 are sequentially melted to connect and disconnect the current path between the power source 3 and the functional circuit 4 , The function is switched from the off state to the on state, and the state is switched back to the off state. At this time, according to the first switch circuit 1, since the first and second usable conductors 14 and 24 are melted to connect and disconnect the current paths of the power source 3 and the functional circuit 4, It is possible to control the on / off of the function physically and irreversibly. Accordingly, unlike the case where the function is controlled to be turned on and off by the software, the vulnerability to illegal use by illegal copying, hacking, cracking, etc. can be improved.

In the above-described first switch circuit 1, the number of the second usable conductors 24 of the open element 20A is one in the circuit configuration. However, as shown in Fig. 5, the second usable conductors 24a, 24b may be provided.

[Second Switch Circuit]

Next, the second switch circuit 2 will be described. In the following description, the same components as those of the first switch circuit 1 described above are denoted by the same reference numerals, and the details thereof are omitted. 6, the second switch circuit 2 has a short circuit portion 10 and an open portion 20, and the short circuit portion 10 and the open portion 20 are connected to the power supply 3 and the functional circuit (4) are connected in parallel. The second switch circuit 2 includes a first current control element 13 for receiving a short-circuit signal and controlling the current so that the short circuit portion 10 is short-circuited between the first and second open electrodes 11 and 12, And a second current control element 23 for receiving the open signal and controlling the open portion 20 to open between the first and second energizing electrodes 21 and 22.

Specifically, as shown in Fig. 7, the second switch circuit 2 includes a short-circuit element 10A constituting the short-circuit part 10 and an open element 20A constituting the open- And the like.

[Shorting device]

In the second switch circuit 2, the shorting element 10A is connected to the first open electrode 11 with the power source 3 and the second open electrode 12 with the function circuit 4 of the device Respectively. The other configuration of the shorting element 10A is as described above.

[Open Device]

The open element 20A of the second switch circuit 2 is connected to the power supply 3 of the device and the second energizing electrode 22 is connected to the functional circuit 4 of the device, Respectively. The other configuration of the open element 20A is as described above.

[Second Switch Control Method]

The second switch circuit 2 is initially opened between the first and second open electrodes 11 and 12 of the short circuit part 10 as shown in Fig. 1 and the second energizing electrodes 21, 22 are short-circuited via the second usable conductors 24. In the second switch circuit 2, the first and second current control elements 13 and 23 stop supplying power to the first and second heating elements 15 and 25. As a result, the second switch circuit 2 secures the feed path from the power source 3 to the functional circuit 4 through the open portion 20, and the function of the device can be used.

If it is necessary to restrict the functions of the device or the software in accordance with the license conditions, for example, after the initial free period of use has passed or when the initial free usage frequency is used, the second current control device 23, An open signal is supplied from the detection circuit, and the second current control element 23 operates. Then, the power of the power source 3 is supplied to the second heating element 25, and the second heating element 25 starts to generate heat. The second usable conductor 24 is fused by transferring the heat of the second heating element 15.

8, the first and second energizing electrodes 21, 22 short-circuited by the second usable conductor 24 are cut off, and the functional circuit 4 is disconnected from the power supply 3, So that the function of the device becomes unusable. Further, the second usable conductor 24 is melted, the feed path to the second heating element 25 is cut off, and the heat generation of the second heating element 25 is stopped.

When the user performs the license agreement procedure and performs the activation of the device, first, the short circuit signal is supplied from the detection circuit to the first current control element 13, and the first current control element 13 operates. Then, the power of the power source 3 is supplied to the first heating element 15, and the first heating element 15 starts to generate heat. The first usable conductor 14 is fused by the heat of the first heating element 15 being transferred.

9, the first and second open electrodes 11 and 12, to which the molten conductor of the first usable conductor 14 is opened, are short-circuited, 4) are connected to enable the function of the device. Further, by melting the first usable conductor 14, the feed path to the first heating element 15 is cut off, and the heating of the first heating element 15 is stopped.

As described above, according to the second switch circuit 2, the current paths of the power source 3 and the functional circuit 4 are cut off and reconnected by successively melting the first and second usable conductors 14 and 24 , The function can be switched from the on state to the off state and switched back to the on state. At this time, according to the second switch circuit 2, the current paths of the power supply 3 and the function circuit 4 are disconnected and reconnected by melting the first and second usable conductors 14 and 24, It is possible to control the on / off of the function physically and irreversibly. Accordingly, unlike the case where the function is controlled to be turned on and off by the software, the vulnerability to illegal use by illegal copying, hacking, cracking, etc. can be improved.

In the second switch circuit 2 described above, the number of the second usable conductors 24 of the open element 20A is one in the circuit configuration. However, as shown in Fig. 10, the second usable conductors 24a, 24b may be provided.

[Device Configuration Example]

[Shorting device]

Next, a configuration example of the shorting element 10A will be described. Fig. 11A shows a plan view of the short-circuit element 10A, and Fig. 11B shows a cross-sectional view of the short-circuit element 10A. The short circuit element 10A includes an insulating substrate 30, a first heat generating element 15 formed on the insulating substrate 30, and a first open electrode 11 and a second A third electrode 31 formed adjacent to the first opening electrode 11 and electrically connected to the first heating element 15 and a second electrode 31 adjacent to the second opening electrode 12, The fourth electrode 32 is formed between the first open electrode 11 and the third electrode 31 to form a current path and the first open electrode 11 and the third electrode 31 form a current path. A first usable conductor 14a that fuses a current path between the first and second electrodes 11 and 31 and shorts the first and second open electrodes 11 and 12 and a second usable conductor 14b that short- Which is formed between the first and second electrodes 11 and 12 and the fourth electrode 32 and is melted by the heating from the first heating element 15 and shorts between the first and second open electrodes 11 and 12, And a usable conductor 14b. The shorting element 10A is provided with a cover member 33 for protecting the inside thereof on the insulating substrate 30. [

The insulating substrate 30 is formed in a substantially rectangular shape using an insulating member such as alumina, glass ceramics, mullite, or zirconia, for example. The insulating substrate 30 may be a material used for a printed wiring board such as a glass epoxy substrate or a phenol substrate. It is necessary to pay attention to the temperature at the time of melting the first usable conductors 14a and 14b.

The first heating element 15 is made of, for example, W, Mo, Ru or the like, which is a conductive member having a relatively high resistance and generates heat when energized. The first heating element 15 is formed by mixing the alloy or the composition thereof or the powder of the compound with a resin binder or the like and forming the paste in a paste form on the insulating substrate 30 by using a screen printing technique And then fired.

The first heating element 15 is coated on the insulating layer 35 on the insulating substrate 30. [ The insulating layer 35 efficiently transfers the heat of the first heating element 15 to the first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32, Molten conductors of the conductors 14a and 14b are formed to coagulate on the first and second open electrodes 11 and 12, and are made of, for example, a glass layer.

The first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32 are formed on the insulating layer 35 covering the first heat generating element 15. The first open electrode 11 is formed adjacent to the second open electrode 12 on one side and is insulated. A third electrode 31 is formed on the other side of the first open electrode 11. The first open electrode 11 and the third electrode 31 are conducted by mounting the first usable conductor 14a and constitute a part of the feed path from the power source 3 to the functional circuit 4 And constitutes a current path at the time of melting the first usable conductors 14a and 14b. The first open electrode 11 is connected to an external connection terminal (not shown) formed on the back surface of the insulating substrate 30 via a conductive through hole 36 facing the side surface of the insulating substrate 30 (FIG. 2) of the opening element 20A or the power source 3 (FIG. 7) via the external connection terminal.

The third electrode 31 is connected to the first heating element 15 through a heating element lead-out electrode 37 formed on the insulating substrate 30. [ The first heating element 15 is connected to the heating element electrode 17 facing the side edge of the insulating substrate 30 with the heating element lead-out electrode 37 interposed therebetween. The heating element electrode 17 is connected to an external connection terminal (not shown) formed on the back surface of the insulating substrate 30 via the electrically conductive through hole 36. Through this external connection terminal, (13).

A fourth electrode 32 is formed on the other side of the second open electrode 12 opposite to the one side adjacent to the first open electrode 11. The first usable conductor 14 is connected to the second open electrode 12 and the fourth electrode 32. The second open electrode 12 is connected to an external connection terminal (not shown) formed on the back surface of the insulating substrate 30 via a conductive through hole 36 facing the side surface of the insulating substrate 30 , And is connected to the functional circuit 4 via the external connection terminal (Figs. 2 and 7).

The first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32 can be formed using common electrode materials such as Cu and Ag. It is preferable that a coating such as Ni / Au plating, Ni / Pd plating, Ni / Pd / Au plating or the like is formed on the surfaces of the open electrodes 11 and 12 by a known plating treatment. Thus, oxidation of the first and second open electrodes 11 and 12 can be prevented and the molten conductor can be reliably maintained. Further, when the short-circuit element 10A is reflow-mounted, the solder for connecting the first usable conductor 14 or the low melting point metal forming the outer layer of the first usable conductor 14 is melted, It is possible to prevent the open electrodes 11 and 12 from being cut by dissolving (soldering) the solder.

[Available conductor]

The first usable conductors 14a and 14b can be made of any metal that is rapidly fused by the heat generated by the first heating element 15 and can be made of a low melting point metal such as Pb-free solder containing Sn as a main component Can be used.

The first usable conductors 14a and 14b may contain a low melting point metal and a high melting point metal. As the low-melting-point metal, it is preferable to use a solder such as Pb-free solder. As the high-melting-point metal, Ag, Cu or an alloy mainly composed of them is preferably used. When the short-circuit element 10A is reflow-mounted by containing the refractory metal and the low melting point metal, even if the reflow temperature exceeds the melting point of the low melting point metal and the low melting point metal is melted, Outflow to the outside can be suppressed and the shape of the first usable conductors 14a and 14b can be maintained. Further, even at the time of fusing, melting of the low-melting-point metal enables melting at a temperature not higher than the melting point of the high-melting-point metal by melting (melting the solder) the high-melting-point metal.

The first usable conductors 14a and 14b can be constituted by a low melting point metal layer as an inner layer and a refractory metal layer as an outer layer. The first usable conductors 14a and 14b may be formed by forming a refractory metal layer on the low melting point metal foil by a plating technique or may be formed by using other well known lamination techniques and film forming techniques . The first usable conductors 14a and 14b may be constituted by a refractory metal layer as an inner layer and a refractory metal layer as an outer layer or a multilayer structure of four or more layers in which a refractory metal layer and a refractory metal layer are alternately stacked .

The first usable conductors 14a and 14b are connected to the first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32 by using solder or the like .

In order to prevent the oxidation of the first usable conductors 14a and 14b and to improve the wettability of the first usable conductors 14a and 14b at the time of melting the first usable conductors 14a and 14b, ) Is applied.

The inside of the short-circuit element 10A is protected by covering the insulating substrate 30 with the cover member 33. [ The cover member 33 has a side wall 33a constituting the side surface of the shorting element 10A and a ceiling surface portion 33b constituting the upper surface of the shorting element 10A, So as to cover the inside of the short-circuit element 10A. The cover member 33 is formed by using an insulating member such as a thermoplastic plastic, a ceramics, or a glass epoxy substrate in the same manner as the insulating substrate 30.

The cover member 33 may be formed with the cover electrode 33c on the inner surface side of the ceiling surface portion 33b. The cover electrode 33c is formed at a position overlapping with the first and second open electrodes 11 and 12. [ When the first heating element 15 generates heat and the first usable conductors 14a and 14b are melted, the cover electrode 33c is heated by the molten conductor 15, which is agglomerated on the first and second open electrodes 11 and 12, It is possible to securely hold the molten conductor between the first and second open electrodes 11 and 12 and to increase the allowable amount of holding the molten conductor.

When the device is activated, the short-circuit element 10A is activated by receiving the short-circuit signal from the first current control element 13, Electric power is supplied to the heating-element electrode 17 through the usable conductor 14a, the heating-element lead-out electrode 37 and the first heating-element 15. Therefore, the first heat generating element 15 generates heat by being energized. When the first usable conductors 14a and 14b are melted by this heat, the molten conductor flocculates on the first and second open electrodes 11 and 12 as shown in Figs. 12 (A) and 12 (B). Since the first and second open electrodes 11 and 12 are formed adjacent to each other, the melted conductors agglomerated on the first and second open electrodes 11 and 12 are coupled to each other, The open electrodes 11 and 12 are short-circuited. That is, the short-circuit element 10A is short-circuited between the terminals of the switch 16 (Figs. 3 and 9).

The energization of the first heating element 15 is stopped because the first usable conductor 14a is fused and the first open electrode 11 and the third electrode 31 are cut off.

[Open Device]

Next, a configuration example of the open element 20A will be described. 13A, the opening element 20A includes an insulating substrate 50, a second heating element 25 laminated on the insulating substrate 50 and covered with the insulating member 51, A first energizing electrode 21 and a second energizing electrode 22 formed at both ends of the heating element 50 and a heating element lead-out electrode 52 laminated so as to overlap the second heating element 25 on the insulating member 51, And a second usable conductor 24 whose both ends are connected to the first and second energizing electrodes 21 and 22 and whose center is connected to the heating-element leading electrode 52.

The insulating substrate 50, the second heating element 25 and the second usable conductor 24 are formed on the insulating substrate 30, the first heating element 15 and the first usable conductor 14 ), And therefore, detailed description thereof will be omitted.

The opening element 20A is provided with the insulating member 51 so as to cover the heating element 14 and the heating element lead-out electrode 52 is disposed so as to face the second heating element 25 via the insulating member 15 . The insulating member 51 may be also laminated between the second heating element 25 and the insulating substrate 50 in order to efficiently transfer the heat of the second heating element 25 to the second usable conductor 24. [ As the insulating member 51, for example, glass can be used.

One end of the heating element extraction electrode 52 is connected to the first heating element electrode 26a and is connected to one end of the second heating element 25 via the first heating element electrode 26a. The other end of the second heating element 25 is connected to the second heating element electrode 26b. The second heating element electrode 26b is connected to an external connection terminal (not shown) formed on the back surface of the insulating substrate 50 through a conductive through hole 55 formed in the insulating substrate 50. [ The second heating element 25 is connected to the second current control element 23 via the second heating element electrode 26b and an external connection terminal.

The second usable conductor 24 is connected to the heating element lead-out electrode 52 and the first and second energizing electrodes 21 and 22 by solder or the like. The second usable conductor 24 can be easily connected by reflow soldering.

13, the first energizing electrode 21 and the second energizing electrode 22, which are formed on both side edges of the insulating substrate 50 and are connected by the second usable conductor 24, (Not shown) formed on the back surface of the insulating substrate 50 via the hole 55. [ The first energizing electrode 21 is connected to the power supply 3 via an external connection terminal (Figs. 2 and 7). The second energizing electrode 22 is connected to the first open electrode 11 (Fig. 2) or the functional circuit 4 (Fig. 7) of the shorting element 10A via the external connection terminal.

The first and second energizing electrodes 21 and 22 and the heating element lead-out electrode 52 can also be formed using a common electrode material such as Cu or Ag. The first and second energizing electrodes 21 and 22, Ni / Pd plating, Ni / Pd / Au plating, etc. are preferably formed on the surface of the heating element lead-out electrode 22 and the heating element lead-out electrode 52 by a known plating process. Thus, oxidation of the first and second energizing electrodes 21 and 22 and the heating-element lead-out electrode 52 can be prevented, and the molten conductor can be reliably maintained. Further, when the open element 20A is reflow-mounted, the solder for connecting the second usable conductor 24 or the low melting point metal forming the outer layer of the second usable conductor 24 is melted, (Solder erosion) of the current-carrying electrodes 21, 22 and the heating-element lead-out electrode 52 can be prevented.

In order to prevent the oxidation of the second usable conductor 24 and to improve the wettability when the second usable conductor 24 is melted, the open element 20A is formed so as to cover almost the entire surface of the second usable conductor 24 And a flux 57 is applied to the surface. Also in the open element 20A, a cover member 58 is formed on the insulating substrate 50 to protect the inside.

When the function of the device is cut off, the open element 20A receives power from the power source 3 side by the second current control element 23 receiving the open signal, Thereby generating heat. 14 (A) and (B), when the second usable conductor 24 is melted by this heat, the molten conductor is heated by the heating-element withdrawing electrode 52, the first and second energizing electrodes 21 and 22, Lt; / RTI > As a result, the first and second energizing electrodes 21 and 22 are opened and the current path between the power source 3 and the functional circuit 4 is cut off (Figs. 4 and 8).

The energization of the second heating element 25 is stopped because the second usable conductor 24 is fused and the first energizing electrode 21 and the second heating element electrode 26b are cut off.

1: a first switch circuit,
2: a second switch circuit,
3: Power supply,
4: Functional circuit,
10: short circuit part,
10A: Short-circuit element,
11: a first open electrode,
12: second open electrode,
13: a first current control element,
14: a first usable conductor,
15: a first heating element,
16: switch,
17: heating element electrode,
20: opening,
20A: open element,
21: first energizing electrode,
22: second energizing electrode,
23: second current control element,
24: second usable conductor,
25: second heating element,
26: heating element electrode,
30: insulating substrate,
31: a third electrode,
32: fourth electrode,
33: cover member,
35: insulating layer,
36: Through hole,
37: heating element drawing electrode,
39: flux,
50: insulated substrate,
51: Insulation member,
55: Through hole,
57: flux,
58: cover member

Claims (6)

And a first heating element which melts the first usable conductor and which melts the first usable conductor by heating the first heating element to short-circuit the open electrodes by the molten conductor, Wow,
And a second heating element for melting the second usable conductor, wherein the second usable conductor is heated by heating the second heating element to melt the second usable conductor, and between the energizing electrodes The opening portion,
A first current control element for controlling power supply to the first heating element,
And a second current control element for controlling power supply to the second heating element,
And the open electrode of the shorting portion and the energizing electrode of the opening portion are connected in series. The method according to claim 1,
Shorting between the open electrodes of the short circuit by the first current control element, switching the entire circuit from the cutoff state to the energized state,
And the second current control element opens between the energizing electrodes of the open portion, and switches the entire circuit from the energized state to the cutoff state. And a first heating element which melts the first usable conductor and which melts the first usable conductor by heating the first heating element to short-circuit the open electrodes by the molten conductor, Wow,
And a second heating element for melting the second usable conductor, wherein the second usable conductor is heated by heating the second heating element to melt the second usable conductor, and between the energizing electrodes The opening portion,
A first current control element for controlling power supply to the first heating element,
And a second current control element for controlling power supply to the second heating element,
And the open electrode of the shorting portion and the energizing electrode of the opening portion are connected in parallel. The method of claim 3,
The second current control element opens between the energizing electrodes of the open portion to switch the entire circuit from the energized state to the cutoff state,
Short-circuiting between the open electrodes of the short-circuited portion by the first current control element, and switching the entire circuit from the cutoff state to the energized state again. And a first heating element which melts the first usable conductor and which melts the first usable conductor by heating the first heating element to short-circuit the open electrodes by the molten conductor, Wow,
And a second heating element for melting the second usable conductor, wherein the second usable conductor is heated by heating the second heating element to melt the second usable conductor, and between the energizing electrodes The opening portion,
A first current control element for controlling power supply to the first heating element,
And a second current control element for controlling power supply to the second heating element,
The open electrode of the shorting part and the energizing electrode of the opening part are connected in series,
Shorting between the open electrodes of the short circuit by the first current control element, switching the entire circuit from the cutoff state to the energized state,
And the second current control element opens between the energizing electrodes of the opening portion, and switches the entire circuit from the energized state to the cutoff state. And a first heating element which melts the first usable conductor and which melts the first usable conductor by heating the first heating element to short-circuit the open electrodes by the molten conductor, Wow,
And a second heating element for melting the second usable conductor, wherein the second usable conductor is heated by heating the second heating element to melt the second usable conductor, and between the energizing electrodes The opening portion,
A first current control element for controlling power supply to the first heating element,
And a second current control element for controlling power supply to the second heating element,
The open electrode of the shorting portion and the energizing electrode of the opening portion are connected in parallel,
The second current control element opens between the energizing electrodes of the open portion to switch the entire circuit from the energized state to the cutoff state,
Short-circuiting between the open electrodes of the short-circuited portion by the first current control element, and switching the entire circuit from the cutoff state to the energized state.

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