JP2002246205A - Adjustable resistor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjustable resistor unit which is adjustable in a wide range of resistance without carrying out a kerfing operation twice or more. SOLUTION: An adjustable resistor unit is equipped with electrodes 1 and 2 and resistor elements 3 to 5 which are different in resistance value, and connected in parallel between the electrodes 1 and 2 by the ends. A resistor element is machined at least to one of the resistor elements 3 to 5 so as to adjust the resistance value of the adjustable resistor element. Concretely, the resister elements 3 to 5 are made to have a low resistance, a middle resistance, and a high resistance, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting resistor whose resistance value is adjusted by processing and molding.

[0002]

2. Description of the Related Art Conventionally, when a resistor for adjusting a desired resistance value is manufactured, first, as a first step, a resistance element having a first resistance value lower than a target resistance value is manufactured, and the following step is performed. In the two steps, the resistance value of the resistance element is made higher than the first resistance value by processing the resistance element having the first resistance value so as to form a kerf. As a result, an adjustment resistor having a second resistance value equal to the target resistance value higher than the first resistance value has been manufactured.

[0003]

However, according to the conventional method of manufacturing the adjusting resistor, when the length L and the width W of the resistance element 101 are substantially the same as shown in FIG. There is a limit to the amount of change in resistance obtained when one cut groove 102 is formed in the second step.
Furthermore, if the limit of the remaining dimension in the width direction of the resistance element 101 after performing the second step is about 10%, it can be changed only to about several times the first resistance value.

In order to increase the amount of resistance change in the second step, after forming one first kerf 111 as shown in FIG. 5, the second kerf 112 should not cross the first kerf 111. There is also a method of forming the same. However, in this method, the current path width of the current passing between the electrodes 121 provided at both ends in the length direction becomes narrow, and the allowable current (power) of the adjusting resistor may be reduced. .

Accordingly, the present invention has been proposed in view of the above-mentioned circumstances, and has as its object to provide an adjusting resistor capable of obtaining a wide range of resistance values without performing kerf machining a plurality of times. And

[0006]

In order to solve the above-mentioned problems, an adjusting resistor according to claim 1 comprises a plurality of electrodes,
A plurality of resistance elements each having both ends connected to the respective electrodes, each having a different resistance value, and arranged in parallel with each other, wherein at least one resistance element is subjected to kerf processing to adjust the resistance value Is done.

In the adjusting resistor according to the first aspect, the resistance value of the plurality of resistance elements connected in parallel becomes the entire resistance value before the kerf processing, and the resistance value is obtained by performing the kerf processing. Is adjusted.

In the adjusting resistor according to the present invention, the plurality of resistive elements include a first adjusting resistive element and a first adjusting resistive element having a size different from the first adjusting resistive element. It may be.

In the adjusting resistor according to the second aspect, each resistance element has a different size and the resistance value of each resistance element is different.

According to a third aspect of the invention, the plurality of resistance elements include a low resistance adjustment resistance element, a medium resistance adjustment resistance element having a larger resistance than the low resistance adjustment resistance element, The high resistance adjusting resistance element having a larger resistance value than the medium resistance adjusting resistance element may be used.

In the adjusting resistor according to the third aspect, the plurality of resistance elements are of low resistance, medium resistance, and high resistance.

In the adjusting resistor according to the fourth aspect, each of the electrodes may be at least partially connected to another electrode, and the resistance may be adjusted by forming a kerf.

In the adjusting resistor according to the fourth aspect, the electrode is also configured as a resistance element, and the electrode is cut.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention is applied, for example, to an adjusting resistor configured as shown in FIG.

This adjusting resistor is made of a metal material having a high electrical conductivity and has electrodes 1 and 2 having a predetermined resistance value, and a first adjusting resistor element 3 having electrodes 1 and 2 connected to both ends thereof. A second adjustment resistance element and a third adjustment resistance element;

These adjustment resistance elements 3 to 5 are connected to the electrode 1,
Each is disposed in parallel with being sandwiched between the electrodes 2.
In this adjusting resistor, the first adjusting resistor 3 has the lowest resistance value, and the third adjusting resistor 5 has the highest resistance value.

In this embodiment, these adjustment resistance elements 3 to 5
Are formed of, for example, materials having the same properties, and are formed into different width dimensions W and length dimensions L, respectively. The first adjustment resistance element 3 is formed with a predetermined first dimension, and the second adjustment resistance element 4
Is formed with a second size larger than the first adjustment resistance element 3, and the third adjustment resistance element 5 is formed with a third size larger than the second adjustment resistance element 4.

In the adjusting resistor configured as described above,
The dimensions of the adjustment resistance elements 3 to 5 are determined and manufactured such that the resistance values are lower than a predetermined resistance value desired by a manufacturer determined in advance. The adjustment resistor is subjected to kerf processing on at least one adjustment resistance element, so that the overall resistance value is increased and adjusted to the target resistance value.

At this time, the working length of the adjusting resistor in the width direction shown in FIG. 2 is determined based on the resistance value of each adjusting resistor element and the target resistance value, and the first adjusting resistor element 3 The kerf processing is performed by laser trimming in the order of the two adjustment resistance elements 4 to form the kerf 3a of the first adjustment resistance element 3 and the kerf 4a of the second adjustment resistance element 4. As a result, the adjustment resistor becomes the target resistance value from the resistance value immediately after manufacturing.

According to such an adjusting resistor, kerf processing is sequentially performed on a plurality of adjusting resistor elements arranged in parallel, so that kerf processing is performed while maintaining the allowable current value as a whole. The resistance value can be obtained in a wide range without performing the above multiple times.

Next, another adjusting resistor to which the present invention is applied is shown in FIG. This adjusting resistor differs from the adjusting resistor shown in FIG. 1 in that the electrode 1 and the electrode 2 are connected at one end in the width direction. The electrodes 1 and 2 have a lower resistivity than the adjusting resistance elements 3 to 5, and the adjustment resistance elements 3 to 5
It functions as an adjustment resistor similar to. That is, in this adjusting resistor, the connecting portion 11 between the electrode 1 and the electrode 2 is an adjusting resistor arranged in parallel with the adjusting resistors 3 to 5. Then, when setting the resistance value of the adjusting resistor to the target resistance value, laser trimming is performed from the connection portion 11 side to form a kerf.

According to the adjusting resistor shown in FIG. 3, since the connection portion 11 which is a metal conductor having a much lower resistance value than the adjusting resistor elements 3 to 5 is regarded as the adjusting resistor element, the resistance value is adjusted. A wide range of resistance values can be adjusted from a low resistance value of about 0Ω to the maximum resistance value of the adjusting resistor shown in FIG.

The above embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and other than the present embodiment, various modifications may be made according to the design and the like within a range not departing from the technical idea according to the present invention. Can be changed.

In the examples shown in FIGS. 1 and 3, the adjustment resistance elements 3 to 5 have been described as being made of the same material.

Further, in the examples shown in FIGS. 1 and 3, the case where three adjusting resistance elements are arranged in parallel has been described. However, the present invention is not limited to this. Of course, the effect can be exerted.

[0027]

According to the adjusting resistor according to the first aspect,
Since the kerf processing can be sequentially performed on a plurality of adjustment resistance elements arranged in parallel, a wide range of resistance values can be obtained without performing the kerf processing a plurality of times while maintaining the overall allowable current value. be able to.

According to the adjusting resistor according to the second aspect, each of the resistance elements is made to have a different size and the resistance value of each of the resistance elements is made different. The value can be adjusted.

According to the third aspect of the present invention, since the plurality of resistance elements are of low resistance, medium resistance, and high resistance, the resistance value can be adjusted over a wider range than in the case of the first aspect. Becomes possible.

According to the adjusting resistor according to the fourth aspect, since the electrode is also configured as a resistance element and a kerf is formed in the electrode, the resistance can be adjusted from an extremely low resistance value.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an adjusting resistor to which the present invention is applied.

FIG. 2 is a plan view showing an adjusting resistor on which kerf processing has been performed.

FIG. 3 is a plan view showing a configuration of another adjusting resistor to which the present invention is applied.

FIG. 4 is a plan view showing a conventional adjusting resistor subjected to kerf processing.

FIG. 5 is a plan view showing another example of a conventional adjusting resistor subjected to kerf processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 electrode 2 electrode 3 1st adjustment resistance element 4 2nd adjustment resistance element 5 3rd adjustment resistance element 11 Connection part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shunsuke Nagakura 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture F-term in Yazaki Parts Co., Ltd. 5E033 BC01 BD12 BF05

Claims (4)

[Claims] 1. A semiconductor device comprising: a plurality of electrodes; and a plurality of resistance elements, both ends of which are connected to the respective electrodes, each of which has a different resistance value and are arranged in parallel. An adjusting resistor characterized in that a kerf is formed and a resistance value is adjusted. 2. The device according to claim 1, wherein the plurality of resistance elements include a first adjustment resistance element and a first adjustment resistance element having a size different from the first adjustment resistance element. The adjustment resistor described. 3. The resistance element for low resistance adjustment, a resistance element for medium resistance adjustment having a resistance larger than the resistance element for low resistance adjustment, and a resistance element for resistance adjustment for medium resistance. 2. The adjustment resistor according to claim 1, comprising a high resistance adjustment resistance element having a large resistance value. 4. The adjusting resistor according to claim 1, wherein each of the electrodes is at least partially connected to another electrode, and a kerf is formed to adjust a resistance value.