JP2001135507A - Network resistor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network resistor which has a structure capable of simplifying manufacturing processes by avoiding a process for forming an insulating layer, and can be more miniaturized. SOLUTION: In this network resistor, two kinds of common potential terminals 1, 2 are installed, a plurality of pairs 3 of resistance elements which are connected in series for dividing potential difference between the two kinds of common potential terminals 1, 2 are installed, and junctions of the respective pairs 3 of the resistance elements are installed as intermediate potential terminals 4. The respective common potential patterns 5, 6 which are connected with the two kinds of common potential terminals 1, 2 constitute different conducting layers interposing an insulating board 9, and two resistance element patterns 7, 8 constitute different conducting layers interposing the insulating board 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a network resistor in which a plurality of resistors are integrated.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, two types of common potential terminals are provided, and resistors are connected in series to divide a potential difference | V1-V2 | between the two types of common potential terminals.
In manufacturing a network resistor having a circuit configuration for extracting the intermediate potential Vo from these connection portions, when the conductive pattern is extracted to the intermediate potential terminal, it must intersect with the conductive pattern connected to the common potential terminal.
For this purpose, an insulating layer is formed at the intersection,
A complicated process of forming a conductive pattern must be performed, and it has been difficult to reduce the size of the network resistor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a structure capable of simplifying a manufacturing process by avoiding a process of forming an insulating layer. It is an object of the present invention to provide a network resistor that can be easily formed.

[0004]

A network resistor according to the present invention, which has been made to solve the above-mentioned problems, has two types of common potential terminals using an insulating substrate as a base and has two types of common potential terminals. A network resistor comprising a plurality of resistor element pairs connected in series to divide a potential difference between the resistor elements, and comprising a plurality of connection portions of the respective resistor element pairs on a side edge portion of the insulating substrate as intermediate potential terminals. ,
Each common potential pattern connected to the two types of common potential terminals constitutes a different conductive layer with the insulating substrate interposed therebetween, and two resistive element patterns constituting each resistive element pair form the insulating substrate. It is characterized in that different conductive layers are configured to be sandwiched therebetween.

[0005] The common potential terminal is an external terminal for obtaining a potential commonly supplied to an element or a pair of elements included in the network resistor, and the potential supplied to the terminal is a constant potential. Or a changing potential. Further, the connection part of each resistance element pair may be a connection point of the resistance element pair, or may be a part drawn from the connection point. One of the common potential patterns connected to the common potential terminal and all of the resistive element patterns directly connected to the common potential pattern may be formed as separate layers. In this case, it is preferable that one of the common potential patterns and all of the resistive element patterns directly connected to one of the common potential patterns form the same conductive layer. still,
To connect directly means to connect to the common potential pattern without intervening an element separately.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the network resistor according to the present invention will be described below with reference to the drawings. The example shown in FIGS. 1 to 3 is a network resistor including eight resistive element pairs 3, and a common potential pattern 5 for drawing a first common potential terminal 1 on a surface of an insulating substrate 9, And a resistance element R1 directly connected to the common potential terminal 1 via a common potential pattern 5, and a common potential pattern 6 for drawing in the second common potential terminal 2 on the back surface of the insulating substrate 9. A resistance element R2 is formed which is directly connected to the second common potential terminal 2 via the common potential pattern 6, and is directly connected to the common potential patterns 5 and 6, respectively, of the terminals of the resistance elements R1 and R2. The terminals on the other side are formed as a set of one resistance element R1 and one resistance element R2, and are electrically connected to each intermediate potential terminal 4.

The insulating substrate 9 of the network resistor is
A groove 10 having a rectangular shape is formed on a side edge of the insulating substrate 9 so as to vertically divide a through hole extending over the front and back surfaces of the insulating substrate 9 into two equal parts. Alternatively, common potential terminals 1 and 2 are formed. In this example, as shown in FIG. 2, a step of forming the common potential patterns 5 and 6 so as to cover the grooves 10 to be the common potential terminals 1 and 2 and a step of forming the intermediate potential terminals 4 and the common potential patterns 5 and 6
Forming the resistive element patterns 7 and 8 so as to cover the groove 11 to be formed, and filling and solidifying a conductive agent in the grooves 10 and 11 to form the common potential terminals 1 and 2 and the intermediate potential terminal 4. As a result, the connection portions of the plurality of resistance element pairs 3 connected in series in order to divide the potential difference between the two types of common potential terminals 1 and 2 are respectively drawn out to the outside as intermediate potential terminals 4. That is, the circuit pattern formed on the network resistor constitutes the electric circuit shown in FIG. 3, and the potential difference | V between the first potential V1 and the second potential V2.
1-V2 | is divided by the resistance element R1 and the resistance element R2, and an intermediate potential Vo is generated at each intermediate potential terminal 4.

As described above, the common potential patterns 5 and 6 and the resistance element patterns 7 and 8 are laminated on one surface of the insulating substrate to form a multilayer structure. Since a kind of broadly conductive layer (a layer not intended for insulation) is formed without separation, the example is directly applied to one of the common potential patterns 5 and 6 and one of the common potential patterns 5 and 6. It can be said that all of the resistive element patterns 7, 8 which are electrically connected are network resistors constituting the same conductive layer. That is, here, the layers separated from each other with the insulating layer interposed therebetween are different conductive layers.

In this example, the intermediate potential terminals 4 are arranged such that the terminals present on the opposite side edges of the insulating substrate 9 face each other, and the constants of the resistance elements are set to the same value. Therefore, the two resistance elements R1 and R1 (or R1) are connected between the intermediate potential terminals 4 and 4 that are opposed to each other.
2, R2) can be formed as a series of patterns, but the constant of the resistance element formed in the network resistor and the voltage division ratio by the resistance element pair 3 are not necessarily required to be constant. A plurality of intermediate potentials Vo can be obtained by forming the resistance element patterns 7 and 8 or performing trimming as appropriate. In the example shown above, the trimming is performed before the step of forming the intermediate potential terminal 4.

A plurality of such network resistors are formed in a grid on a single insulating substrate and are finally divided.
The common potential terminal and the intermediate potential terminal are plated to form individual network resistors. Note that terminal materials such as a common potential terminal and an intermediate potential terminal, a conductive material used for a common potential pattern, and a resistance material used for a resistance element pattern may be selected from conventionally used materials. A method suitable for the material, such as printing and baking, may be used.

[0011]

As described above, the network resistor according to the present invention has two types of common potential terminals, and the resistors are connected in series to divide the potential difference | V1-V2 | between the two types of common potential terminals. Also, when manufacturing a network resistor having a circuit configuration for extracting the intermediate potential Vo from the connection portion thereof, when extracting the conductive pattern up to the intermediate potential terminal, cross the conductive pattern connected to the common potential terminal. It is not necessary to go through the complicated process of forming an insulating layer at the intersection and further forming a conductive pattern, so that the manufacturing process is not only simplified, but also simplified. It becomes relatively easy to reduce the size.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory diagrams exemplifying an outline of a circuit pattern formed on the front and back of an insulating substrate in a network resistor according to the present invention; FIGS.

FIGS. 2A and 2B are schematic views illustrating a part of a manufacturing process of a network resistor according to the present invention; FIGS.

FIG. 3 is an electric circuit diagram drawn in a perspective view from the circuit pattern of the network resistor shown in FIG. 2;

FIG. 4 is an electric circuit diagram illustrating a circuit configuration of a voltage dividing circuit similar to that of FIG. 3 so that disadvantages of the related art become apparent.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 common potential terminal 2 common potential terminal 3 resistance element pair 4 intermediate potential terminal 5 common potential pattern 6 common potential pattern 7 resistance element pattern 8 resistance element pattern 9 insulating substrate 10, 11 groove

Claims (1)

[Claims] 1. An insulated substrate (9) having two types of common potential terminals (1, 2) as a base and connected in series to divide the potential difference between the two types of common potential terminals (1, 2). A network resistor including a plurality of connected resistance element pairs (3), and a plurality of connection portions of the respective resistance element pairs (3) as intermediate potential terminals (4) at side edges of the insulating substrate (9). And the two types of common potential terminals (1,
Each of the common potential patterns (5, 6) connected to 2) forms a different conductive layer with the insulating substrate (9) interposed therebetween, and two resistance element patterns forming each of the resistance element pairs (3). (7, 8) Network resistors each forming a different conductive layer with the insulating substrate (9) interposed therebetween.