JPH10321984A - Circuit pattern forming method and sheet-type electric resistance body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of forming a circuit pattern which can easily form a circuit pattern, having a predetermined resistance value at the surface of a sheet-type insulated base material. SOLUTION: At the surface of a seal base material 2 formed of a sheet type insulated base material such as a paper material, etc., a narrow belt type conductive lead pattern 5 which has localized cut-out portions 7, 11 for cutting electric continuity between one end and the other end is formed using conductive ink. Next, resistance layers 15, 16 are formed by resistance ink at the cut-out portion of the conductive pattern to assure electrical continuity between one end and the other end of the conductive pattern 5. Thereafter, a circuit pattern 3 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a circuit pattern by printing a circuit pattern on the surface of a sheet-like insulating substrate, and a sheet-like resistor having a predetermined resistance value in the circuit pattern. Particularly, it is suitable for printing a circuit pattern having a predetermined resistance value on a base material such as paper.

[0002]

2. Description of the Related Art Conventionally, when a circuit pattern is formed on the surface of an insulating substrate, a fine powder such as carbon or copper is kneaded with an adhesive and has conductivity and conductivity. Using ink, this ink was printed on the surface of the insulating base material.

As the above-mentioned insulating substrate, a hard type obtained by using a paper or glass cloth as a base material, impregnating the base material with a synthetic resin such as phenol or epoxy, heating and pressing, and then performing a curing treatment. Or a flexible type substrate using a sheet-like synthetic resin having flexibility.

Recently, there has been a demand to directly print a circuit pattern on a base material such as paper in order to impart various functions to an electric circuit or to reduce manufacturing costs. For example, break the paper such as paper for the purpose of adding a function to detect the seal opening action to a sealing seal (sheet-shaped electric resistor) attached to the opening and closing part of the sealing object so that it is easy to find out that it has been opened. Attempts have been made to form a circuit pattern adjusted to a predetermined resistance value on the surface of an insulating sheet material (insulating base material) that is easy to operate.

[0005]

By the way, the electric resistance value is greatly affected by the width of the printed conductor, and also varies depending on the thickness of the conductor. The circuit pattern is much longer in length than the width of the printed line. For this reason,
When printing with an ink containing an electric resistor over the entire length of a circuit pattern, it has been difficult to keep the thickness and width of the ink constant with accuracy that does not affect the electric resistance value. In particular, the above-mentioned paper has permeability because it is an aggregate of fibers and is porous, so that the printed conductive ink penetrates in the thickness direction of the paper and the width direction of the surface. I will. As a result, the resistance value of the printed circuit pattern varies, and the resistance value often falls outside the allowable range (error range) of the set resistance value. Therefore, the yield of the products has deteriorated and the quality has become unstable.
It was also difficult to fine-tune the resistance value after printing. And even if it prints on the synthetic resin sheet which has little permeability, if it prints with the ink including the electric resistor over the entire length of the circuit pattern, the thickness and width of the ink can be adjusted with the precision which does not affect the resistance value. It is difficult to make it constant. Therefore, the resistance value of the printed circuit pattern varies.

Accordingly, an object of the present invention is to provide a circuit pattern forming method capable of printing a circuit pattern having a predetermined resistance value on the surface of a sheet-like insulating substrate such as paper.

[0007]

Means for Solving the Problems The present invention has been proposed in order to achieve the above object. According to the present invention, a circuit pattern having a predetermined resistance value is formed on a surface of a sheet-like insulating substrate. A method of forming a circuit pattern, comprising: forming a conductive portion (resistive pattern 5) having a locally defective portion in the middle thereof and cutting off electrical continuity between one end and the other end, by using an electrically good conductor. A step of forming a conductive wire portion to be printed on the surface of the insulating base material with the first conductive ink;
Forming a resistance applying portion (resistance layer 6) on the defective portion with conductive ink and electrically connecting one end and the other end of the conductive wire portion through the resistance applying portion. This is a method for forming a circuit pattern.

Here, the electrically good conductor is a conductive substance having a resistance value of 0 ohm or a resistance value close to 0 ohm.
For example, gold, silver, copper, etc. correspond. Specifically, the first conductive ink corresponds to a copper paste or a silver paste obtained by kneading copper powder or silver powder or the like with an adhesive substance, or a conductive ink containing copper powder or silver powder or the like. . In addition, an electric resistor is a substance that imparts electric resistance, for example, carbon or the like. The second conductive ink corresponds to a resistance paste obtained by kneading carbon powder together with an adhesive substance, a resistance ink containing carbon powder, and the like.

According to a second aspect of the present invention, there is provided a circuit pattern forming method for forming a circuit pattern having a predetermined resistance value on a surface of a sheet-like insulating substrate, wherein one end and the other end are connected in parallel. A plurality of connecting portions are provided, and a local defective portion is provided in the middle of each connecting portion, and a conductive wire portion in which electrical conduction between one end and the other end is cut by each defective portion is formed of an electrically good conductor. A conductive wire portion forming step of printing on the surface of the insulating base material with the first conductive ink, and a resistance applying portion printed on each defective portion with the second conductive ink including an electric resistor;
A resistance applying portion forming step of electrically connecting one end and the other end of the conducting wire portion through the resistance applying portion, and an electric resistance between the one end and the other end of the conducting wire portion after the resistance applying portion forming step A method for forming a circuit pattern, comprising: a resistance value measuring step of actually measuring a value; and a trimming step of cutting electrical conduction of a resistance applying section selected based on the measured electric resistance value.

According to a third aspect of the present invention, there is provided a circuit pattern forming method, wherein the plurality of resistance applying sections are printed with different resistance values.

According to a fourth aspect of the present invention, the plurality of resistance applying sections include a main resistance applying section for defining a resistance value of a circuit pattern, and an adjusting section for adjusting an actually measured resistance value to a specified value. 3. The electrical connection of an adjusting resistance applying unit selected based on an actually measured resistance value in the trimming step.
Or a circuit pattern forming method according to claim 3.

Here, the main resistance applying section (main resistance layer 15)
Is a portion for defining the resistance value of the circuit pattern, and the adjustment resistance applying portion (adjustment resistance layer 16) is a portion provided for adjusting the resistance value of the circuit pattern to the specified value.

According to a fifth aspect of the present invention, there is provided an electric resistor having a circuit pattern having a predetermined resistance value formed on a surface of a sheet-shaped insulating base material, the conductive wire portion having a locally defective portion in the middle. Is printed on the surface of the insulating base material with a first conductive ink made of a good electrical conductor, and a resistance applying portion is printed on the defective portion with a second conductive ink containing an electric resistor to form a circuit pattern. It is a sheet-shaped electric resistor characterized by doing.

According to a sixth aspect of the present invention, there is provided an electric resistor in which a circuit pattern having a predetermined resistance value is formed on the surface of a sheet-shaped insulating base material, and one end and the other end are connected in parallel. A plurality of connection portions and a local wire portion provided in the middle of each connection portion, and a wire portion in which electrical continuity between one end and the other end is cut by each of the loss portions is formed of a good electrical conductor. (1) printing the surface of the insulating base material with the conductive ink, and printing the resistance applying portion on each defective portion with the second conductive ink including the electric resistor to form a circuit pattern; Is a sheet-shaped electric resistor characterized by comprising a main resistance applying portion for defining a resistance value of a circuit pattern and an adjusting resistance applying portion for adjusting an actually measured resistance value to a specified value. .

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, a method of manufacturing a sealing seal, which is a kind of a sealing sensor, will be described as an example. This sealing seal is a sheet-shaped electric resistor as a whole. For example, when a problem occurs when the seal is opened after being closed once, as in a control device of a pachinko machine,
It is attached to the opening / closing part to make it easy to determine that the door has been opened.

First, the configuration of the seal will be described. As shown in FIG. 1, the sealing seal 1
And a circuit pattern 3 formed on the surface of the seal base material 2;
Coating layer 4 that covers and protects the surface of the sealing base material 2 and the circuit pattern 3 (the area indicated by hatching in the figure)
It is schematically composed of

In the present embodiment, the sealing base material 2 is made of a relatively thin and low-strength paper material, and the surface of the sealing base material 2 is printed with a "sealing" character indicating that it is a sealing. .
Note that the seal base material 2 may be any insulating sheet-like member that breaks relatively easily. However, when a paper material is used as in the present embodiment, there is an advantage that raw material costs can be reduced and products can be supplied at low cost. Then, an adhesive layer (not shown) exhibiting a strong adhesive force is provided on the back surface of the seal base material 2 or an adhesive is applied. Further, the back surface of the seal base material 2 may be an adhesive surface that adheres to the adhesive applied to the surface to be adhered (that is, the opening / closing portion of the object to be sealed).

The circuit pattern 3 includes a strip-shaped wire pattern 5 functioning as a wire portion, and a resistance layer 6 provided in the middle of the wire pattern 5 and functioning as a resistance applying portion. The conductive wire pattern 5 is made of a paste (liquid having a relatively high viscosity) of a conductive paste kneaded with an adhesive such as an adhesive, or a liquid conductive ink containing the conductive material. The first conductive ink is formed by printing on the surface of the sealing base material 2). The conductive material here is a good electrical conductor having a resistance value of 0 ohm or a value close to 0 ohm, such as gold, silver, or copper.

In the middle of the above-described conductor pattern 5, FIG.
As shown in FIG. 5, a first defective portion 7 in which the conductive wire pattern 5 is locally lost is provided. A plurality of thin strip-shaped wire connecting portions 10 are provided between the first conducting portion 8 and the second conducting portion 9 in a state of being electrically connected with the first defective portion 7 as a boundary. It is. In the middle of the connecting portion 10, a second missing portion 11 which is locally lost is provided.
Due to the first and second deficient portions 7 and 11, an electrical connection between the first conducting portion 8 at one end of the conductive wire pattern 5 and the second conducting portion 9 at the other end is provided. The conduction is in a disconnected state. Note that the end portion of the conductive wire pattern 5 located near the first defective portion 7 also functions as the connection portion 10.

The first energizing section 8 and the second energizing section 9 are arranged intensively at the connector connecting section 12 provided at the right end in FIG. 1, and a connector (not shown) provided with a lead wire is provided. And electrically connected to the outside.

The resistance layer 6 is composed of a main resistance layer 15 (main resistance application section) provided in the first defect portion 7 and an adjustment resistance layer 16 (adjustment resistance application section) provided in the second defect portion 11. The main resistance layer 15 and the adjustment resistance layer 16
The first conducting portion 8 side and the second conducting portion 9 side of the conductive wire pattern 5 are electrically connected. Here, the main resistance layer 15 and the adjustment resistance layer 16 define the resistance value of the circuit pattern 3. Such a resistive layer 6 is provided by printing, for example, a resistive ink or a resistive paste that contains carbon and is conductive but has a resistance value (that is, a second conductive ink).

When the main resistance layer 15 and the adjustment resistance layer 16 are provided, the plurality of adjustment resistance layers 16 are connected in parallel to the main resistance layer 15, and the appropriate adjustment resistance layer is provided. By cutting off the conduction of 16, the resistance value of the circuit pattern 3 (corresponding to the resistance value between the first conducting section 8 and the second conducting section 9) can be changed. That is, the main resistance layer 15 functions as a resistance serving as a reference for the resistance value of the circuit pattern 3. The adjustment resistance layer 16 adjusts the resistance value of the circuit pattern 3 to a predetermined value, or creates a circuit pattern 3 having a plurality of resistance values from one circuit pattern 3 (that is, a circuit pattern 3 having different specifications). It functions as an adjusting resistor when adjusting.

In this embodiment, the effective length of the main resistance layer 15 (that is, the length corresponding to the first defect portion), the cross-sectional area and the effective length of the adjustment resistance layer 16 (that is, the second defect portion) are used. Length) and the same cross-sectional area.
The same resistance ink is used to form the main resistance layer 15 or the adjustment resistance layer 16.
By changing the effective length and the sectional area of the resistance layer, the resistance value of the main resistance layer 15 and the resistance value of the adjustment resistance layer 16 can be made different, or the resistance value of each adjustment resistance layer 16 can be made different. it can. Thus, each of the resistance layers 15, 16
By making the resistance values different, the adjustable range of the resistance value of the circuit pattern 3 can be widened, and the circuit pattern 3 with more specifications can be manufactured.

Further, when the resistance value of the adjustment resistance layer 16 is set to a resistance value higher than the resistance value of the main resistance layer 15 (for example, about 100 times), the resistance value of the circuit pattern 3 becomes equal to the resistance value of the main resistance layer 15. Since the resistance value is a combined resistance value of the resistance value of the adjustment resistance layer 16 and the resistance value of the adjustment resistance layer 16, the resistance value can be close to the resistance value of the main resistance layer 15. Further, with respect to the adjustment resistance layer 16, even when the electrical conduction of the adjustment resistance layer 16 is cut off, the amount of change in the resistance value of the circuit pattern 3 becomes small. That is, the main resistance layer 1
The resistance value of the circuit pattern 3 can be set to a resistance value (that is, a reference) close to the resistance value of No. 5 and the resistance value of the circuit pattern 3 can be finely adjusted by cutting off the conduction of the adjustment resistance layer 16. it can.

Incidentally, in order to make the resistance values of the resistance layers 15 and 16 different, different resistance inks having different resistance values may be used.

The coating layer 4 is a synthetic resin layer such as a thermosetting resin or an ultraviolet curable resin. The coating layer 4 is provided using a coating device called a coater or the like, and covers the entire surface excluding the connector connection portion 12 described above. In addition, regarding this coating layer 4,
In order to use it as the sealing seal 1, it is required that it can be easily broken. In view of this, the coating layer 4 is made of a synthetic resin having relatively low mechanical strength,
It is desirable to form in a thin layer.

Cut portions 17 extending from the outer peripheral edge to just before the conductor pattern 5 are formed at a plurality of locations on the side edges of the seal base material 2, and breaks from the cut portions 17 intersect the conductor pattern 5. I have to do it. The notch 17 in the present embodiment is a substantially T-shaped slit formed with its head facing the conductor pattern 5 side. The conductive wire pattern 5 is bent, for example, in a U-shape and is arranged close to the cut portion 17 so that the break from the slit immediately crosses the conductive wire pattern 5.

Next, an outline of a method of using the sealing seal 1 will be described. The sealing seal 1 is used by attaching it to an opening / closing portion (not shown) of an object to be sealed. In this stuck state, electrical signals from the first energizing unit 8 and the second energizing unit 9 are input to, for example, a security device (not shown).

At this time, the sealing seal 1 and the object to be sealed are adhered with a strong adhesive force so as not to be easily peeled off. Then, when the wrongdoer applies a pulling force to the sealing seal 1 to peel off the sealing seal 1, the sealing seal 1
Of the notch 1
Stress concentration occurs on the head of No. 7. Due to this stress concentration, the sealing seal 1 (the seal base material 2 or the like) is broken, and the broken portion intersects the conductive wire pattern 5 to cut the conductive wire pattern 5.

When the conductive pattern 5 is cut, the electrical continuity of the circuit pattern 3 is cut or the conductive pattern 5 is cut.
Since the resistance value of the circuit pattern 3 changes depending on the shape of the electronic device, the security device detects such a change in the electrical state and determines whether or not there is an illegal act.

Similarly, when a wrongdoer tries to perform an illegal work and peels off the coating layer 4, the peeling action breaks the electrical continuity of the circuit pattern 3 or changes the resistance value. I do. In addition, the first and second
When the current-carrying portions 8 and 9 are short-circuited, the entire resistance value is monitored, so that a fraud can be detected.

Next, a method for manufacturing the sealing seal 1 will be described. In this manufacturing method, as shown in FIG.
A sheet or roll paper (hereinafter, referred to as a base paper 20) having electrical insulating properties and serving as the seal base material 2 is used.
0 is divided into a number of rectangular areas 21 arranged in the vertical and horizontal directions for use. That is, one sealing seal 1 is manufactured by one rectangular area 21 and a large number of sealing seals 1 are manufactured by one operation.

The sealing seal 1 includes a conductor part printing (forming) step of printing a conductor pattern 5 (conductor part) on the surface of the base paper 20 (the surface of the seal base material 2), and a resistance layer 6 (resistance applying part). To form a circuit pattern 3 by printing a resist pattern, a coating step of coating the surface of the seal base material 2 on which the circuit pattern 3 is formed, and forming the cutout 17 in the coated base paper 20. Notch forming step, cutting step for cutting the base paper 20, resistance value measuring step for actually measuring the electric resistance value of the circuit pattern 3, cutting section selecting step for selecting the adjustment resistance layer 16 for cutting off the electrical continuity, It is manufactured through a trimming step or the like for cutting electrical conduction of the selected adjustment resistance layer 16.

In the conductor printing step, as shown in FIG.
The conductive pattern 5 of a strip-shaped line in which the first deficient portion 7 and the second deficient portion 11 are locally provided is formed using a conductive ink (a kind of the first conductive ink). In the conductive part printing step, for example, a mask member from which the conductive pattern 5 has been cut is placed on the surface of the base paper 20. After the mask member is placed, the conductive ink is applied to the surface of the mask member and dried to form a conductive wire pattern 5 on the surface of the base paper 20 (seal substrate 2). In the conductive part printing step, conductive ink or the like may be applied to the relief plate on which the conductive pattern 5 is formed, and the conductive ink may be transferred to the surface of the base paper 20 to form the conductive pattern 5.

In the resistance applying portion printing step, as shown in FIG. 4A, the main resistance layer 15 (main resistance applying portion) is provided in the first defective portion 7 and the adjustment resistance layer 16 is provided in the second defective portion 11. (Adjustment resistance applying section) is provided. As described above, the main resistance layer 15 and the adjustment resistance layer 16 are formed by printing a resistance ink (a kind of the second conductive ink) or the like. That is, similarly to the conductor part printing step, the conductive member is provided using a mask member or a relief plate. As shown in FIG. 4B, each of the resistance layers 15 and 16 is provided such that its end overlaps with the end of the connection portion 10 (a part of the conductor pattern 5).

Each of the resistance layers 15 and 16 thus provided is
Is localized, even if the resistance ink or the like (the second conductive ink) permeates into the base paper 20 (the seal base material 2) or bleeds in the width direction, the change in the resistance value due to the influence is ignored. As little as possible. Further, even if the width and thickness of each of the resistance layers 15 and 16 after printing deviate from the design values, the deviation amount is negligibly small. Therefore, the obtained resistance value of the circuit pattern 3 falls within a predetermined resistance value.

In the coating step, as described above,
Using a coating device, the entire surface of the base paper 20 excluding the connector connection portion 12 is covered with a synthetic resin layer. That is, the entire surface is covered except the region A indicated by oblique lines in FIG. In the notch 17 forming step, the notch 17 (see FIG. 1) is formed in the base paper 20 using a cutter or the like.

In the cutting step, the base paper 2 shown by a dotted line in FIG.
The U-shaped portion B as a surplus portion of 0 is cut out, and the vertical and horizontal line portions C shown by solid lines are cut out, and the base paper 20 is cut into a rectangular area 21.
Disconnect each time. Thereby, as shown in FIG. 1, it is possible to obtain a horizontally long convex sealing seal 1 (sheet-shaped electric resistor) in which the width of the connector connection portion 12 is reduced by one step.

In the resistance value measuring step, a tester or the like is used.
The resistance value between the first energizing part 8 and the second energizing part 9, that is, the resistance value of the circuit pattern 3 is actually measured for each of the obtained seals 1. In the cutting portion selection step, the adjustment resistance layer 16 to be disconnected is selected based on the actually measured resistance value. Here, since the adjustment resistance layer 16 is provided locally, it has a specified resistance value. Therefore, based on the difference between the resistance value defined by the circuit pattern 3 and the actually measured resistance value, it is possible to determine which of the adjustment resistance layers 16 should be disconnected.

In the trimming step, the connection portion 10 connected to the selected adjustment resistance layer 16 is disconnected and the connection is cut. As means for disconnecting, for example, as shown in FIG. 1, a punch hole 22 may be formed on the connecting portion 10 to cut off conduction, or a hot pen having a high-temperature tip such as a soldering iron. The connection portion 10 may be burned off. That is, the means for disconnecting can take any configuration. Note that the adjustment resistance layer 16 itself may be cut.

When the trimming process is completed, a final inspection is performed. In this final inspection, the resistance value of the circuit pattern 3 is actually measured again, and the presence or absence of other abnormalities is inspected to determine whether the circuit pattern 3 can be shipped.

It should be noted that the above-described resistance value measuring step, cut section selecting step, and trimming step may be performed as steps prior to the cutting step. That is, the rectangular area 21
Before disconnecting each time, actual measurement of the resistance value of the circuit pattern 3, selection of the adjustment resistance layer 16 to be disconnected, disconnection of the selected adjustment resistance layer 16, etc. may be performed. In addition, even when an adhesive layer is provided on the back surface of the seal base material 2, the adhesive layer forming step of forming the adhesive layer is performed in a step before the cutting step, that is, in a state before cutting into the rectangular region 21. This is convenient because the forming operation of applying and attaching the adhesive layer can be performed only once. The circuit pattern 3 may be printed on the base paper 20 on which the adhesive layer has been formed in advance.

In the illustrated seal 1, the surface of the seal substrate 2 (base paper 20) is covered with the coating layer 4, but the surface may be covered by a lamination process. In any case, it is desirable to form a protective layer that covers the circuit pattern 5.

In the above-described manufacturing method, the steps for manufacturing the sealing seal 1 having the circuit pattern 3 of a single specification (that is, one kind of resistance value) have been described.
The same process may be applied to the case of manufacturing the sealing seal 1 (sheet-like electric resistor) having the circuit patterns 3 having different specifications (that is, different resistance values). That is, in the above-described cutting portion selection step, so that the resistance value conforms to the specifications,
What is necessary is just to select the adjustment resistance layer 16 to be disconnected based on the actually measured resistance value. In addition, it is preferable that the resistance value measuring step in the present invention is performed every time for every sheet-shaped electric resistor (sealing seal 1), but the present invention is not limited to this. If the resistance value measured in the resistance value measuring step is within a predetermined error range, it goes without saying that the trimming step is passed.

The seal 1 described above is configured to protect the surface of the seal base 2 such as the circuit pattern 3 by the coating layer 4 or the laminate layer. As shown in FIG. After separately providing the seal base 2 on which the pattern 3 and the like are formed and the protective sheet 25 formed of a film larger than the seal base 2, the seal base 2 is attached to the opening / closing portion of the object to be sealed. The protection sheet 25 may be attached so as to cover the surface of the base material 2.

The size, shape, and the like of the sealing seal 1 can be arbitrarily determined, such as length and width.
For example, the shape may be a horizontally long rectangular shape or a circular shape. In the above, the manufacturing method of the sealing seal has been described as an example. However, the present invention can be applied to a general manufacturing method of an electric circuit pattern.

[0047]

According to the present invention as described above, the following effects can be obtained. According to the invention described in claim 1 and the invention described in claim 5, the conductive wire portion having a local defective portion in the middle and the electrical continuity between one end and the other end being cut off is replaced with an electrically good conductor. A step of forming a lead portion for printing on the surface of the insulating base material with a first conductive ink comprising: and a resistance applying portion printed on the deficient portion with a second conductive ink containing an electric resistor; And a resistance imparting portion forming step of electrically connecting one end and the other end of the conducting wire portion through the portion, so that the manufacturing process is performed. Does not affect the resistance value of the circuit pattern. Then, the resistance imparting portion disposed in the defective portion of the conductor affects the resistance value of the circuit pattern. However, since the resistance applying portion is local like the defective portion, the thickness and width of the printed resistance applying portion have some variation,
Even if the insulating base material has the permeability of the liquid substance,
It is possible to reduce a change in resistance value due to a variation in the thickness and width of the second conductive ink, and a change in resistance value due to permeation or bleeding into the insulating base material. Therefore, the resistance value of the circuit pattern can be easily kept within the specified range, and the yield can be improved and the quality can be stabilized.

According to the second and sixth aspects of the present invention, a plurality of connecting portions for connecting one end and the other end in parallel are provided, and a local defective portion is provided in the middle of each connecting portion. Forming a conductive wire portion, in which electrical continuity between one end and the other end is cut by each defective portion, on the surface of the insulating base material using the first conductive ink made of an electrically good conductor A resistance applying section for printing a resistance applying section on each defective portion with a second conductive ink including an electric resistor, and electrically connecting one end and the other end of the conducting wire section via the resistance applying section; Forming step, a resistance value measuring step of actually measuring an electric resistance value between one end and the other end of the conducting wire portion after the resistance applying section forming step, and a resistance applying section selected based on the actually measured electric resistance value. And a trimming process to cut off electrical continuity. By cutting the electrical conduction part, it is possible to change the resistance value of the circuit pattern. Thereby, even if the resistance value of the formed circuit pattern deviates from the specified resistance value, it can be adjusted to the specified resistance value by post-processing. Further, a circuit pattern having a plurality of specifications having different resistance values can be manufactured from one circuit pattern. Therefore, the yield at the time of manufacturing is improved, and circuit patterns having different specifications can be manufactured in the same process, so that manufacturing costs can be reduced.

According to the third aspect of the present invention, since the plurality of resistance applying sections are printed with different resistance values, the circuit in the case where the electrical conduction of the resistance applying section is cut off. The change range of the resistance value of the pattern can be widened. This makes it possible to adjust a larger deviation of the resistance value. In addition, a circuit pattern having more specifications can be manufactured from one circuit pattern.

According to the fourth aspect of the present invention, the plurality of resistance applying sections include a main resistance applying section for defining a resistance value of a circuit pattern, and an adjusting section for adjusting an actually measured resistance value to a specified value. The trimming step, wherein the trimming step cuts off the electrical continuity of the adjustment resistance applying section selected based on the actually measured resistance value, so that the measured resistance value of the formed circuit pattern is Can be adjusted to the specified resistance value by cutting off the conduction of the connection portion corresponding to the adjustment resistance applying portion even if the distance is different from the specified resistance value. Therefore, the resistance value of the circuit pattern can be adjusted more accurately.

[Brief description of the drawings]

FIG. 1 is a front view of a sealing seal.

FIG. 2 is a diagram illustrating a base paper used when manufacturing a sealing seal.

FIG. 3 is a diagram illustrating a state in which a conductive wire pattern is formed on a base paper (seal base material) as an insulating base material.

FIGS. 4A and 4B are diagrams illustrating a state in which a resistance layer is formed on a base paper (seal base material) on which a conductive wire pattern is formed, where FIG. 4A is a front view and FIG. It is an expanded sectional view.

FIG. 5 is a diagram illustrating an example in which a sealing seal is configured by a seal base material and a protective sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealing seal 2 Seal base material 3 Circuit pattern 4 Coating layer 5 Conductive pattern 6 Resistive layer 7 First deficient part 8 First conducting part 9 Second conducting part 10 Connecting part 11 Second deficient part 12 Connector connecting part 15 Main Resistance layer 16 Adjustment resistance layer 17 Notch 20 Base paper 21 Rectangular area 22 Punch hole 25 Protective sheet

Claims (6)

[Claims] 1. A circuit pattern forming method for forming a circuit pattern having a predetermined resistance value on a surface of a sheet-shaped insulating base material, comprising: A conductive wire portion forming step of printing the electrically disconnected conductive wire portion on the surface of the insulating base material using a first conductive ink made of an electrically good conductor, and a second conductive ink containing an electrical resistor. Forming a resistance applying portion on the defective portion and electrically connecting one end and the other end of the conducting wire portion through the resistance applying portion. . 2. A circuit pattern forming method for forming a circuit pattern having a predetermined resistance value on a surface of a sheet-shaped insulating base material, comprising a plurality of connecting portions for connecting one end and the other end in parallel. A locally defective portion is provided in the middle of each connection portion, and the conducting wire portion in which the electrical continuity between one end and the other end is cut by each defective portion is insulated by the first conductive ink made of an electrically good conductor. A conductor portion forming step of printing on the surface of the conductive base material, printing a resistance applying portion on each defective portion with a second conductive ink including an electric resistor, and connecting one end of the conductor portion to the other through the resistance applying portion. A resistance applying portion forming step of electrically connecting the ends to each other; a resistance value measuring step of measuring an electric resistance value between one end and the other end of the conducting wire portion after the resistance applying portion forming step; Cuts off the electrical continuity of the resistance application section selected based on the resistance value Circuit pattern forming method of the trimming process, characterized in that through the that. 3. The circuit pattern forming method according to claim 2, wherein the plurality of resistance applying sections are printed with different resistance values. 4. The plurality of resistance applying sections include a main resistance applying section for defining a resistance value of a circuit pattern, and an adjustment resistance applying section for adjusting an actually measured resistance value to a specified value. 4. The circuit pattern forming method according to claim 2, wherein in the trimming step, the electrical conduction of the adjustment resistance applying section selected based on the actually measured resistance value is cut off. 5. An electric resistor having a circuit pattern of a predetermined resistance value formed on a surface of a sheet-shaped insulating base material, wherein a conductive wire portion having a locally defective portion in the middle is made of an electrically good conductor. A circuit pattern formed by printing on the surface of an insulating base material with a conductive ink and printing a resistance applying portion on the defective portion with a second conductive ink containing an electric resistor. Electric resistor. 6. An electric resistor having a circuit pattern having a predetermined resistance value formed on a surface of a sheet-shaped insulating base material, comprising: a plurality of connecting portions for connecting one end and the other end in parallel; A locally defective portion is provided in the middle of the connecting portion, and the conductive portion, in which the electrical continuity between one end and the other end is cut by each defective portion, is insulated by the first conductive ink made of an electrically good conductor. While printing on the surface of the base material, a resistance applying portion is printed on each defective portion with a second conductive ink including an electric resistor to form a circuit pattern, and the resistance applying portion sets a resistance value of the circuit pattern. A sheet-shaped electric resistor, comprising: a main resistance applying section for specifying the resistance value; and an adjustment resistance applying section for adjusting an actually measured resistance value to a specified value.