JP4681964B2 - Method of trimming metal plate resistor for current detection and metal plate resistor for current detection manufactured by this method - Google Patents

Method of trimming metal plate resistor for current detection and metal plate resistor for current detection manufactured by this method Download PDF

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JP4681964B2
JP4681964B2 JP2005206895A JP2005206895A JP4681964B2 JP 4681964 B2 JP4681964 B2 JP 4681964B2 JP 2005206895 A JP2005206895 A JP 2005206895A JP 2005206895 A JP2005206895 A JP 2005206895A JP 4681964 B2 JP4681964 B2 JP 4681964B2
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JP2007027383A (en
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守男 多田
悟 高崎
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Hokuriku Electric Industry Co Ltd
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本発明は、電流検出用金属板抵抗器のトリミング方法及びこの方法により製造された電流検出用金属板抵抗器に関する。   The present invention relates to a current detection metal plate resistor trimming method and a current detection metal plate resistor manufactured by this method.

従来の電流検出用金属板抵抗器は、銅−ニッケル、マンガニン、ゼラニン、ニクロム等の各種合金からなる金属板抵抗体と銅や真鍮等からなる電極、および、絶縁や保護のための樹脂からなっていた。金属板抵抗体と電極は、電気溶接、圧着、レーザー溶接等によってなされているのが一般的である。   Conventional metal plate resistors for current detection are made of metal plate resistors made of various alloys such as copper-nickel, manganin, geranin, nichrome, etc., electrodes made of copper, brass, etc., and resins for insulation and protection. It was. The metal plate resistor and the electrode are generally made by electric welding, pressure bonding, laser welding, or the like.

このような電流検出用金属板抵抗器は精度が要求されるため、一般的に金属板抵抗器には抵抗調整のためにトリミングが施されている(例えば、特許文献1参照。)。   Since such a metal plate resistor for current detection requires accuracy, the metal plate resistor is generally trimmed for resistance adjustment (see, for example, Patent Document 1).

次に、このような電流検出用金属板抵抗器の製造方法は、エッチング加工または金型によるプレス打ち抜き加工により所定形状に金属板抵抗体を形成し、この金属板抵抗体に電極端子を取り付けた後、ダイヤモンドカッター、レーザー、サンドブラスト等の方法で抵抗値調整のトリミングが行われる。
特開平11−162720号公報 図5
Next, in the method of manufacturing such a metal plate resistor for current detection, a metal plate resistor is formed into a predetermined shape by etching or press punching using a mold, and an electrode terminal is attached to the metal plate resistor. Thereafter, trimming for adjusting the resistance value is performed by a method such as diamond cutter, laser, sand blasting or the like.
Japanese Patent Laid-Open No. 11-162720 FIG.

これらの製造方法で製造された製品には、次のような問題点がある。   The products manufactured by these manufacturing methods have the following problems.

まず、レーザーやサンドブラストによるトリミングでは、切削量が少なく、大幅な抵抗値調整を期待できない問題点がある。そのため、所定の抵抗値を得るためには、予め所定の抵抗値に近い初期抵抗値に金属板抵抗体をつくり込んでおく必要がある。よって、広範な抵抗値に対応するためには、多くの初期抵抗材料を保有する必要があり、多大なコストを必要とする問題点がある。さらに、初期抵抗を形成する段階で、打ち抜きや切削等の工数も必要となり、コスト高となる問題点がある。また、多くの初期抵抗をもたない材料の金属板抵抗体を用いて、トリミング方法のみで抵抗値調整をしようとした場合には、レーザーやサンドブラストでは切削量が少ないことから、時間をかける必要があり、製造コストが高くなる問題点がある。   First, in the trimming by laser or sand blasting, there is a problem that the cutting amount is small and a large resistance value adjustment cannot be expected. Therefore, in order to obtain a predetermined resistance value, it is necessary to make a metal plate resistor in advance to an initial resistance value close to the predetermined resistance value. Therefore, in order to cope with a wide range of resistance values, it is necessary to have many initial resistance materials, and there is a problem that requires a great deal of cost. Furthermore, at the stage of forming the initial resistance, man-hours such as punching and cutting are required, which increases the cost. In addition, when trying to adjust the resistance value only with the trimming method using a metal plate resistor that does not have many initial resistances, it is necessary to take time because the amount of cutting is small with laser and sandblasting. There is a problem that the manufacturing cost becomes high.

次に、ダイヤモンドカッターによるスリット形成トリミングを行うと、調整量を大きくとれるため、多くの初期抵抗をもつ金属材料の用意が必要でなく、その分の製造コストは押さえられるが、スリット形成トリミングでは電流経路が大きく変化するため高周波回路では自己インダクタンスが大きくなり、正確な電流検出ができなくなる問題点がある。   Next, slit trimming with a diamond cutter increases the amount of adjustment, so it is not necessary to prepare a metal material with many initial resistances. Since the path changes greatly, the high-frequency circuit has a problem that self-inductance increases and accurate current detection cannot be performed.

さらに、これらのトリミング方法では、比較的製品サイズが大きい製品では可能であっても、製品サイズが小さくなるにつれてトリミングが困難になる問題点がある。   Further, these trimming methods have a problem that trimming becomes difficult as the product size is reduced even if it is possible for a product having a relatively large product size.

本発明の目的は、抵抗値調整が容易な電流検出用金属板抵抗器のトリミング方法を得ることにある。   An object of the present invention is to obtain a method for trimming a metal plate resistor for current detection which can easily adjust a resistance value.

本発明の他の目的は、製品サイズが小さくても、抵抗値調整が容易な電流検出用金属板抵抗器のトリミング方法を得ることにある。   Another object of the present invention is to obtain a trimming method for a metal plate resistor for current detection which can easily adjust a resistance value even if the product size is small.

本発明の他の目的は、コストが安く、且つ自己インダクタンスが小さい、優れた特性の電流検出用金属板抵抗器を得ることにある。   Another object of the present invention is to obtain a metal plate resistor for current detection having excellent characteristics and low cost and low self-inductance.

上記の目的を達成する本発明の構成を説明すると、次のとおりである。   The configuration of the present invention that achieves the above object will be described as follows.

本発明に係る電流検出用金属板抵抗器のトリミング方法は、金属板抵抗体と、その少なくとも一方の面に、金属板抵抗体とは異なる材質で一体に設けられた金属薄膜層と、該金属板抵抗体にその板面方向に間隔をあけて一体に接続された複数の接続端子とを備えた電流検出用金属板抵抗器を用い、該電流検出用金属板抵抗器の金属薄膜層にトリミングを行うことにより所望の抵抗値を得る。   A trimming method for a metal plate resistor for current detection according to the present invention includes a metal plate resistor, a metal thin film layer integrally provided with a material different from the metal plate resistor on at least one surface thereof, and the metal Trimming a metal thin film layer of the current detecting metal plate resistor using a current detecting metal plate resistor having a plurality of connection terminals integrally connected to the plate resistor at intervals in the plate surface direction. To obtain a desired resistance value.

このような電流検出用金属板抵抗器のトリミング方法では、金属板抵抗体の少なくとも一方の面に、金属板抵抗体とは異なる材質で一体に設けた金属薄膜層に対してトリミングを行うので、金属薄膜層は膜厚が薄く、抵抗値が安定しており、この金属薄膜層に対するトリミングにより抵抗値調整を容易に短時間に行うことができる。   In such a current detection metal plate resistor trimming method, trimming is performed on a metal thin film layer integrally provided with a material different from the metal plate resistor on at least one surface of the metal plate resistor. The metal thin film layer is thin and has a stable resistance value, and the resistance value can be easily adjusted in a short time by trimming the metal thin film layer.

また本発明に係る電流検出用金属板抵抗器のトリミング方法は、金属板抵抗体と、その少なくとも一方の面に、金属板抵抗体とは異なる材質で該金属板抵抗体の板面方向に間隔をあけ該金属板抵抗体の板面の一部を露出させて一体に設けられた複数の金属薄膜層と、該金属板抵抗体にその板面方向に間隔をあけて各金属薄膜層に対応させて一体に接続された複数の接続端子とを備えた電流検出用金属板抵抗器を用い、該電流検出用金属板抵抗器の各金属薄膜層にトリミングを行うことにより所望の抵抗値を得る。   Further, the current detection metal plate resistor trimming method according to the present invention includes a metal plate resistor and at least one surface thereof made of a material different from the metal plate resistor and spaced in the plate surface direction of the metal plate resistor. A plurality of metal thin film layers that are integrally provided by exposing a part of the plate surface of the metal plate resistor, and corresponding to each metal thin film layer with a space in the plate surface direction in the metal plate resistor Using a current detecting metal plate resistor having a plurality of connection terminals integrally connected to each other, trimming each metal thin film layer of the current detecting metal plate resistor to obtain a desired resistance value .

このような電流検出用金属板抵抗器のトリミング方法では、金属板抵抗体と金属薄膜層の2層構造の部分と、金属板抵抗体のみの1層構造の部分と、金属板抵抗体と金属薄膜層の2層構造の部分とからなり、それぞれの2層構造の部分は断面積が大きくなって抵抗値が減り、1層構造の部分は金属板抵抗体のみで両側の部分より抵抗値が大きくなって、これらの和により全体的に金属板抵抗体のみのものに比べて抵抗値を小さくすることができる。抵抗値の大きさは、各トリミング部により調整できる。   In such a current detection metal plate resistor trimming method, the metal plate resistor and the metal thin film layer have a two-layer structure portion, a metal plate resistor only one-layer structure portion, a metal plate resistor and a metal plate. It consists of two layers of thin film layers, and each two-layer structure has a larger cross-sectional area and a lower resistance value. By increasing the sum of these, the resistance value can be reduced as a whole as compared to the metal plate resistor alone. The magnitude of the resistance value can be adjusted by each trimming unit.

このトリミングをレーザーまたはサンドブラストにより行うと、金属薄膜層の膜厚が薄いためこれらの手段で容易に金属薄膜層を取り除けて、容易にトリミングを行うことができる。また、レーザーやサンドブラストによるトリミングによれば、製品サイズが小さくても、抵抗値調整を容易に行うことができる。さらに、金属薄膜層のレーザーやサンドブラストによるトリミングによれば、抵抗値調整にかかる時間が短くてすみ、製造コストを低減することができる。   When this trimming is performed by laser or sand blasting, since the metal thin film layer is thin, the metal thin film layer can be easily removed by these means, and the trimming can be easily performed. Further, according to trimming by laser or sandblasting, the resistance value can be easily adjusted even if the product size is small. Furthermore, the trimming of the metal thin film layer by laser or sand blasting can shorten the time required for adjusting the resistance value, thereby reducing the manufacturing cost.

次に、本発明に係る電流検出用金属板抵抗器は、金属板抵抗体と、その少なくとも一方の面に、金属板抵抗体とは異なる材質で一体に設けられた金属薄膜層と、該金属板抵抗体にその板面方向に間隔をあけて一体に接続された複数の接続端子と、金属薄膜層に設けられたトリミング部とを備えてなる。   Next, a metal plate resistor for current detection according to the present invention includes a metal plate resistor, a metal thin film layer integrally provided on at least one surface thereof with a material different from that of the metal plate resistor, and the metal A plurality of connection terminals integrally connected to the plate resistor at intervals in the plate surface direction, and a trimming portion provided on the metal thin film layer are provided.

このような電流検出用金属板抵抗器によれば、金属薄膜層にトリミング部が設けられているので、コストが安く、また電流経路が大きく変化することがないため自己インダクタンスが小さく、優れた特性の電流検出用金属板抵抗器を得ることができる。   According to such a metal plate resistor for current detection, since the trimming part is provided in the metal thin film layer, the cost is low and the current path does not change greatly, so the self-inductance is small, and the excellent characteristics. The metal plate resistor for current detection can be obtained.

また、本発明に係る電流検出用金属板抵抗器は、金属板抵抗体と、その少なくとも一方の面に、金属板抵抗体とは異なる材質で該金属板抵抗体の板面方向に間隔をあけ該金属板抵抗体の板面の一部を露出させて一体に設けられた複数の金属薄膜層と、該金属板抵抗体にその板面方向に間隔をあけて各金属薄膜層に対応させて一体に接続された複数の接続端子と、各金属薄膜層に設けられたトリミング部とを備えてなる。   The metal plate resistor for current detection according to the present invention has a metal plate resistor and at least one surface thereof spaced apart in the plate surface direction of the metal plate resistor by using a material different from that of the metal plate resistor. A plurality of metal thin film layers that are integrally provided by exposing a part of the plate surface of the metal plate resistor, and corresponding to each metal thin film layer at intervals in the plate surface direction of the metal plate resistor A plurality of connection terminals connected together and a trimming portion provided in each metal thin film layer are provided.

このような電流検出用金属板抵抗器でも、各金属薄膜層にトリミング部が設けられているので、コストが安く、また電流経路が大きく変化することがないため自己インダクタンスが小さく、優れた特性の電流検出用金属板抵抗器を得ることができる。特にこの構造では、金属板抵抗体の板面方向に間隔をあけ該金属板抵抗体の板面の一部を露出させて複数の金属薄膜層を設けているので、これら複数の金属薄膜層の面積の設定により抵抗値の調整をより一層容易に行うことができる。   Even in such a metal plate resistor for current detection, each metal thin film layer is provided with a trimming portion, so that the cost is low and the current path does not change greatly, so that the self-inductance is small, and it has excellent characteristics. A metal plate resistor for current detection can be obtained. In particular, in this structure, a plurality of metal thin film layers are provided by exposing a part of the plate surface of the metal plate resistor with an interval in the plate surface direction of the metal plate resistor. The resistance value can be adjusted more easily by setting the area.

このような電流検出用金属板抵抗器でも、各金属薄膜層にトリミング部が設けられているので、コストが安く、また電流経路が大きく変化することがないため自己インダクタンスが小さく、優れた特性の電流検出用金属板抵抗器を得ることができる。   Even in such a metal plate resistor for current detection, each metal thin film layer is provided with a trimming portion, so that the cost is low and the current path does not change greatly, so that the self-inductance is small, and it has excellent characteristics. A metal plate resistor for current detection can be obtained.

この際に、金属薄膜層が金属板抵抗体の接続端子が設けられていない面に設けられていると、各接続端子の金属板抵抗体に対する接続状態を安定化させることができる。   At this time, if the metal thin film layer is provided on the surface where the connection terminal of the metal plate resistor is not provided, the connection state of each connection terminal to the metal plate resistor can be stabilized.

また、金属板抵抗体と金属薄膜層とトリミング部との表面を覆って絶縁被覆層を設けると、これらが他のものに直接触れることがなくなり、電流検出用金属板抵抗器を安定させて安全に使用することができる。   In addition, if an insulating coating layer is provided to cover the surfaces of the metal plate resistor, metal thin film layer, and trimming part, they will not be in direct contact with other objects, making the current detection metal plate resistor stable and safe. Can be used for

本発明に係る電流検出用金属板抵抗器のトリミング方法は、金属板抵抗体の少なくとも一方の面に、金属板抵抗体とは異なる材質で一体に設けた金属薄膜層に対してトリミングを行うので、金属薄膜層は膜厚が薄く、抵抗値が安定しており、この金属薄膜層に対してトリミングを行うため、抵抗値調整を容易に短時間に行うことができる。   The trimming method of the current detecting metal plate resistor according to the present invention performs trimming on a metal thin film layer integrally provided with a material different from that of the metal plate resistor on at least one surface of the metal plate resistor. The metal thin film layer is thin and has a stable resistance value, and the metal thin film layer is trimmed, so that the resistance value can be easily adjusted in a short time.

次に、本発明に係る電流検出用金属板抵抗器は、金属板抵抗体の少なくとも一方の面に設けられた金属薄膜層にトリミング部が設けられているので、コストが安く、また電流経路が大きく変化することがないため自己インダクタンスが小さく、優れた特性の電流検出用金属板抵抗器を得ることができる。   Next, in the metal plate resistor for current detection according to the present invention, since the trimming portion is provided in the metal thin film layer provided on at least one surface of the metal plate resistor, the cost is low and the current path is Since it does not change greatly, a self-inductance is small, and a metal plate resistor for current detection with excellent characteristics can be obtained.

以下、本発明に係る電流検出用金属板抵抗器のトリミング方法及びこの方法により製造された電流検出用金属板抵抗器を実施するための最良の形態について、図面を参照して詳細に説明する。   Hereinafter, a trimming method of a metal plate resistor for current detection according to the present invention and a best mode for carrying out the metal plate resistor for current detection manufactured by this method will be described in detail with reference to the drawings.

図1は本発明に係る電流検出用金属板抵抗器のトリミング方法により製造された電流検出用金属板抵抗器の実施の形態の第1例を示した斜視図である。   FIG. 1 is a perspective view showing a first example of an embodiment of a current detecting metal plate resistor manufactured by a current detecting metal plate resistor trimming method according to the present invention.

この電流検出用金属板抵抗器の構造を、そのトリミング方法と共に説明する。この電流検出用金属板抵抗器は、金属板抵抗体1と、その一方の面に、金属板抵抗体1とは異なる材質で一体に設けられた金属薄膜層3と、金属板抵抗体1にその板面方向に間隔をあけて対向する2辺に隣接させて一体に接続された2つの接続端子5a,5bと、金属薄膜層3に他の対向辺の一方から設けられた溝よりなるトリミング部7とを備えてなっている。   The structure of the current detecting metal plate resistor will be described together with its trimming method. The metal plate resistor for current detection includes a metal plate resistor 1, a metal thin film layer 3 integrally formed on one surface of the metal plate resistor 1 with a material different from the metal plate resistor 1, and the metal plate resistor 1. Trimming composed of two connection terminals 5a and 5b integrally connected adjacent to two sides facing each other with an interval in the plate surface direction, and a groove provided in one of the other opposing sides in the metal thin film layer 3 Part 7.

金属板抵抗体1は、銅−ニッケル、マンガニン、ゼラニン、ニクロム等の各種合金により板状に形成され、且つ所要の大きさの長方形または正方形になっている。   The metal plate resistor 1 is formed into a plate shape from various alloys such as copper-nickel, manganin, geranin, and nichrome, and has a rectangular or square shape with a required size.

金属薄膜層3は、2つの接続端子5a,5bが設けられていない金属板抵抗体1の面に、銅、ニッケル、アルミニュウム等の金属板抵抗体1とは異なる材質のものを、メッキ、スパツタ、蒸着、熱間圧延、または鍛接等により数μm〜数百μm程度に施して設ける。   The metal thin film layer 3 is formed by plating a surface of the metal plate resistor 1 on which the two connection terminals 5a and 5b are not provided with a material different from that of the metal plate resistor 1 such as copper, nickel, and aluminum. , Vapor deposition, hot rolling, or forging, etc. to provide a thickness of several μm to several hundred μm.

2つの接続端子5a,5bは、銅、真鍮、銀、スズ等により形成したものを、熱間圧接、鍛接または半田付け等により接続する。これら接続端子5a,5bは、金属板抵抗体1の幅方向の一端から他端を横切って設ける。   The two connection terminals 5a and 5b are made of copper, brass, silver, tin or the like and are connected by hot welding, forging or soldering. These connection terminals 5 a and 5 b are provided across from the one end in the width direction of the metal plate resistor 1 to the other end.

トリミング部7は、金属薄膜層3に線状にレーザーやサンドブラストにより設ける。レーザーによるトリミングは、金属薄膜層3の表面に例えばガラス層を設けて、このガラス層と金属薄膜層3とを一緒にトリミングすることにより行うことにより、熱の拡散を押さえて良好に行うことができる。サンドブラストによるトリミングは、金属薄膜層3の表面に、スリット溝を設けたマスク板を当てて行う。トリミング部7の幅や長さは、設定する抵抗値に応じて適宜設定される。   The trimming portion 7 is provided in a linear form on the metal thin film layer 3 by laser or sandblasting. Trimming with a laser can be performed satisfactorily by suppressing diffusion of heat by providing, for example, a glass layer on the surface of the metal thin film layer 3 and trimming the glass layer and the metal thin film layer 3 together. it can. Trimming by sandblasting is performed by applying a mask plate provided with slit grooves to the surface of the metal thin film layer 3. The width and length of the trimming unit 7 are appropriately set according to the resistance value to be set.

このような電流検出用金属板抵抗器のトリミング方法では、金属板抵抗体1の一方の面に、金属板抵抗体1とは異なる材質で一体に設けた金属薄膜層3に対してトリミングを行うので、金属薄膜層3は膜厚が薄く、抵抗値が安定しており、この金属薄膜層3に対するトリミングにより抵抗値調整を容易に短時間に行うことができる。   In such a current detecting metal plate resistor trimming method, trimming is performed on the metal thin film layer 3 integrally provided on one surface of the metal plate resistor 1 with a material different from that of the metal plate resistor 1. Therefore, the metal thin film layer 3 is thin and has a stable resistance value, and the resistance value can be easily adjusted in a short time by trimming the metal thin film layer 3.

このトリミングをレーザーまたはサンドブラストにより行うと、金属薄膜層3の膜厚が薄いためこれらの手段で容易に金属薄膜層3を取り除けて、容易にトリミングを行うことができる。また、レーザーやサンドブラストによるトリミングによれば、製品サイズが小さくても、抵抗値調整を容易に行うことができる。さらに、金属薄膜層3のレーザーやサンドブラストによるトリミングによれば、抵抗値調整にかかる時間が短くてすみ、製造コストを低減することができる。   When this trimming is performed by laser or sand blasting, the metal thin film layer 3 is thin, so that the metal thin film layer 3 can be easily removed by these means and the trimming can be easily performed. Further, according to trimming by laser or sandblasting, the resistance value can be easily adjusted even if the product size is small. Furthermore, the trimming of the metal thin film layer 3 by laser or sand blasting can shorten the time required for adjusting the resistance value, thereby reducing the manufacturing cost.

次に、本発明に係る電流検出用金属板抵抗器は、金属板抵抗体1の一方の面に、該金属板抵抗体1とは異なる材質で一体に設けた金属薄膜層3にトリミング部7を設けているので、コストが安く、また電流経路が大きく変化することがないため自己インダクタンスが小さく、優れた特性の電流検出用金属板抵抗器を得ることができる。   Next, the current detecting metal plate resistor according to the present invention has a trimming portion 7 formed on a metal thin film layer 3 integrally formed of a material different from that of the metal plate resistor 1 on one surface of the metal plate resistor 1. Is provided at a low cost, and the current path does not change greatly, so that the self-inductance is small and a metal plate resistor for current detection with excellent characteristics can be obtained.

また、このように金属薄膜層3が、金属板抵抗体1の接続端子5a,5bが設けられていない面に設けられていると、各接続端子5a,5bの金属板抵抗体1に対する接続状態を安定化させることができる。   Further, when the metal thin film layer 3 is provided on the surface of the metal plate resistor 1 where the connection terminals 5a and 5b are not provided, the connection state of the connection terminals 5a and 5b to the metal plate resistor 1 is as follows. Can be stabilized.

図2は本発明に係る電流検出用金属板抵抗器の実施の形態の第2例を示した斜視図である。この図では、図1との対応部分に、図1の符号に100を加えた番号を付けて示している。   FIG. 2 is a perspective view showing a second example of the embodiment of the metal plate resistor for current detection according to the present invention. In this figure, the parts corresponding to those in FIG. 1 are indicated by the numbers obtained by adding 100 to the reference numerals in FIG.

この例の電流検出用金属板抵抗器では、接続端子105a,105bを設けていない金属板抵抗体101の一方の面で、接続端子105a,105bの裏面に相当する部分に、2つの金属薄膜層103,103が金属板抵抗体101の板面方向に間隔をあけて相互に平行に設けられている。これら金属薄膜層103,103の間では、金属板抵抗体101が露出されている。トリミング部107,107は、金属板抵抗体101が露出されている側で、金属薄膜層103,103の縁部に沿って接続端子105a,105bに平行に設けられている。   In the current detecting metal plate resistor of this example, two metal thin film layers are formed on one surface of the metal plate resistor 101 where the connection terminals 105a and 105b are not provided, on a portion corresponding to the back surface of the connection terminals 105a and 105b. 103 and 103 are provided in parallel to each other at an interval in the plate surface direction of the metal plate resistor 101. Between these metal thin film layers 103, 103, the metal plate resistor 101 is exposed. The trimming portions 107 and 107 are provided in parallel with the connection terminals 105a and 105b along the edges of the metal thin film layers 103 and 103 on the side where the metal plate resistor 101 is exposed.

このような電流検出用金属板抵抗器のトリミングも第1例と同様にして行う。   Trimming of such a metal plate resistor for current detection is performed in the same manner as in the first example.

この場合、電流検出用金属板抵抗器の板状抵抗部は、金属板抵抗体101と金属薄膜層103の2層構造の部分と、金属板抵抗体101のみの1層構造の部分と、金属板抵抗体101と金属薄膜層103の2層構造の部分との3つの部分からなり、それぞれの2層構造の部分は断面積が大きくなって抵抗値が減り、1層構造の部分は金属板抵抗体101のみで両側の部分より抵抗値が大きくなって、これらの和により全体的に金属板抵抗体101のみのものに比べて抵抗値を小さくすることができる。抵抗値の大きさは、トリミング部107,107により調整できる。   In this case, the plate-like resistor portion of the metal plate resistor for current detection includes a two-layer structure portion of the metal plate resistor 101 and the metal thin film layer 103, a one-layer structure portion of the metal plate resistor 101 only, It consists of three parts, the plate resistor 101 and the two-layer structure part of the metal thin film layer 103. Each of the two-layer structure parts has a larger cross-sectional area and the resistance value is reduced, and the one-layer structure part is a metal plate. The resistance value is larger than the portions on both sides only by the resistor 101, and the sum of these can make the resistance value smaller as a whole than the one having only the metal plate resistor 101. The magnitude of the resistance value can be adjusted by the trimming units 107 and 107.

かかる電流検出用金属板抵抗器のトリミング方法及びこの方法により製造された電流検出用金属板抵抗器でも、第1例と同様な効果を得ることができる。特にこの構造では、金属板抵抗体101の板面方向に間隔をあけ該金属板抵抗体101の板面の一部を露出させて複数の金属薄膜層103,103を設けているので、これら複数の金属薄膜層103,103の面積の設定により抵抗値の調整をより一層容易に行うことができる。   The trimming method of the current detecting metal plate resistor and the current detecting metal plate resistor manufactured by this method can provide the same effects as in the first example. In particular, in this structure, a plurality of metal thin film layers 103 and 103 are provided with a gap in the plate surface direction of the metal plate resistor 101 to expose a part of the plate surface of the metal plate resistor 101. The resistance value can be adjusted more easily by setting the areas of the metal thin film layers 103 and 103.

図3は本発明に係る電流検出用金属板抵抗器の実施の形態の第3例を示した斜視図である。この図では、図1との対応部分に、図1の符号に200を加えた番号を付けて示している。   FIG. 3 is a perspective view showing a third example of the embodiment of the metal plate resistor for current detection according to the present invention. In this figure, the parts corresponding to those in FIG. 1 are indicated by the numbers obtained by adding 200 to the reference numerals in FIG.

この例の電流検出用金属板抵抗器では、図2と同様に金属薄膜層203,203を分断して設けた一方の面に、接続端子205a,205bも金属板抵抗体201と一体に設けている。   In the metal plate resistor for current detection of this example, the connection terminals 205a and 205b are also provided integrally with the metal plate resistor 201 on one surface provided by dividing the metal thin film layers 203 and 203 as in FIG. Yes.

このような電流検出用金属板抵抗器のトリミングも第1例と同様にして行う。   Trimming of such a metal plate resistor for current detection is performed in the same manner as in the first example.

かかる電流検出用金属板抵抗器のトリミング方法及びこの方法により製造された電流検出用金属板抵抗器でも、第1例と同様な効果を得ることができる。   The trimming method of the current detecting metal plate resistor and the current detecting metal plate resistor manufactured by this method can provide the same effects as in the first example.

図4は本発明に係る電流検出用金属板抵抗器の実施の形態の第4例を示した斜視図である。この図では、図1との対応部分に、図1の符号に300を加えた番号を付けて示している。   FIG. 4 is a perspective view showing a fourth example of the embodiment of the metal plate resistor for current detection according to the present invention. In this figure, the parts corresponding to those in FIG. 1 are indicated by the numbers obtained by adding 300 to the reference numerals in FIG.

この例の電流検出用金属板抵抗器では、例えば第1例、第2例、第3例の電流検出用金属板抵抗器の金属板抵抗体1,101,201と金属薄膜層3,103,203とトリミング部7,107,207との表面を覆って絶縁被覆層309が設けられている。   In the metal plate resistor for current detection of this example, for example, the metal plate resistors 1, 101, 201 and the metal thin film layers 3, 103 of the metal plate resistors for current detection of the first example, the second example, the third example, An insulating coating layer 309 is provided so as to cover the surfaces of 203 and the trimming portions 7, 107, and 207.

このようにすると、金属板抵抗体1,101,201と金属薄膜層3,103,203とトリミング部7,107,207とが他のものに直接触れることがなくなり、電流検出用金属板抵抗器を安定させて安全に使用することができる。   In this way, the metal plate resistors 1, 101, 201, the metal thin film layers 3, 103, 203, and the trimming portions 7, 107, 207 are not directly in contact with each other, and the current detection metal plate resistors. Can be used safely.

なお、金属薄膜層3に対するトリミング部7の形成は、1本に限らず複数本でもよい。   The number of trimming portions 7 formed on the metal thin film layer 3 is not limited to one, and a plurality of trimming portions 7 may be formed.

また、金属薄膜層は金属板抵抗体の両面に設けることもできる。これら金属板抵抗体に対するトリミング部の形成は、片面でも、両面でもよい。   Moreover, a metal thin film layer can also be provided on both surfaces of a metal plate resistor. The trimming portion for these metal plate resistors may be formed on one side or both sides.

本発明に係る電流検出用金属板抵抗器のトリミング方法により製造された電流検出用金属板抵抗器の実施の形態の第1例を示した斜視図である。It is the perspective view which showed the 1st example of embodiment of the metal plate resistor for electric current detection manufactured by the trimming method of the metal plate resistor for electric current detection which concerns on this invention. 本発明に係る電流検出用金属板抵抗器のトリミング方法により製造された電流検出用金属板抵抗器の実施の形態の第2例を示した斜視図である。It is the perspective view which showed the 2nd example of embodiment of the metal plate resistor for electric current detection manufactured by the trimming method of the metal plate resistor for electric current detection which concerns on this invention. 本発明に係る電流検出用金属板抵抗器のトリミング方法により製造された電流検出用金属板抵抗器の実施の形態の第3例を示した斜視図である。It is the perspective view which showed the 3rd example of embodiment of the metal plate resistor for electric current detection manufactured by the trimming method of the metal plate resistor for electric current detection which concerns on this invention. 本発明に係る電流検出用金属板抵抗器のトリミング方法により製造された電流検出用金属板抵抗器の実施の形態の第4例を示した斜視図である。It is the perspective view which showed the 4th example of embodiment of the metal plate resistor for electric current detection manufactured by the trimming method of the metal plate resistor for electric current detection which concerns on this invention.

符号の説明Explanation of symbols

1,101,201 金属板抵抗体
3,103,203 金属薄膜層
5a,5b,205a,205b,305a,305b 接続端子
7,107,207 トリミング部
309 絶縁被覆層
1, 101, 201 Metal plate resistor 3, 103, 203 Metal thin film layer 5a, 5b, 205a, 205b, 305a, 305b Connection terminal 7, 107, 207 Trimming part 309 Insulation coating layer

Claims (7)

金属板抵抗体と、その少なくとも一方の面に、前記金属板抵抗体とは異なる材質で一体に設けられた金属薄膜層と、前記金属板抵抗体にその板面方向に間隔をあけて一体に接続された複数の接続端子とを備えた電流検出用金属板抵抗器を用い、該電流検出用金属板抵抗器の前記金属薄膜層にトリミングを行うことにより所望の抵抗値を得る電流検出用金属板抵抗器のトリミング方法。   A metal thin film layer integrally formed of a material different from the metal plate resistor on at least one surface of the metal plate resistor, and the metal plate resistor integrally with a space in the plate surface direction A current detecting metal having a desired resistance value by trimming the metal thin film layer of the current detecting metal plate resistor using a current detecting metal plate resistor having a plurality of connected connection terminals Trimming method for plate resistors. 金属板抵抗体と、その少なくとも一方の面に、前記金属板抵抗体とは異なる材質で該金属板抵抗体の板面方向に間隔をあけ該金属板抵抗体の板面の一部を露出させて一体に設けられた複数の金属薄膜層と、前記金属板抵抗体にその板面方向に間隔をあけて前記各金属薄膜層に対応させて一体に接続された複数の接続端子とを備えた電流検出用金属板抵抗器を用い、該電流検出用金属板抵抗器の前記各金属薄膜層にトリミングを行うことにより所望の抵抗値を得る電流検出用金属板抵抗器のトリミング方法。   A part of the plate surface of the metal plate resistor is exposed on at least one surface of the metal plate resistor with a material different from that of the metal plate resistor in the direction of the plate surface of the metal plate resistor. A plurality of metal thin film layers provided integrally with each other, and a plurality of connection terminals integrally connected to the metal plate resistor in correspondence with each metal thin film layer with a space in the plate surface direction. A trimming method for a metal plate resistor for current detection, which uses a metal plate resistor for current detection and obtains a desired resistance value by trimming each metal thin film layer of the metal plate resistor for current detection. 前記トリミングはレーザーまたはサンドブラストにより行う請求項1に記載の電流検出用金属板抵抗器のトリミング方法。   The method of trimming a metal plate resistor for current detection according to claim 1, wherein the trimming is performed by laser or sandblasting. 金属板抵抗体と、その少なくとも一方の面に、前記金属板抵抗体とは異なる材質で一体に設けられた金属薄膜層と、前記金属板抵抗体にその板面方向に間隔をあけて一体に接続された複数の接続端子と、前記金属薄膜層に設けられたトリミング部とを備えてなる電流検出用金属板抵抗器。   A metal thin film layer integrally formed of a material different from the metal plate resistor on at least one surface of the metal plate resistor, and the metal plate resistor integrally with a space in the plate surface direction A metal plate resistor for current detection comprising a plurality of connected connection terminals and a trimming portion provided in the metal thin film layer. 金属板抵抗体と、その少なくとも一方の面に、前記金属板抵抗体とは異なる材質で該金属板抵抗体の板面方向に間隔をあけ該金属板抵抗体の板面の一部を露出させて一体に設けられた複数の金属薄膜層と、前記金属板抵抗体にその板面方向に間隔をあけて前記各金属薄膜層に対応させて一体に接続された複数の接続端子と、前記各金属薄膜層に設けられたトリミング部とを備えてなる電流検出用金属板抵抗器。   A part of the plate surface of the metal plate resistor is exposed on at least one surface of the metal plate resistor with a material different from that of the metal plate resistor in the direction of the plate surface of the metal plate resistor. A plurality of metal thin film layers integrally provided, a plurality of connection terminals integrally connected to the metal plate resistor so as to correspond to the metal thin film layers at intervals in the plate surface direction, A metal plate resistor for current detection comprising a trimming portion provided in a metal thin film layer. 前記金属薄膜層は前記金属板抵抗体の前記接続端子が設けられていない面に設けられている請求項4または5に記載の電流検出用金属板抵抗器。   6. The metal plate resistor for current detection according to claim 4, wherein the metal thin film layer is provided on a surface of the metal plate resistor on which the connection terminal is not provided. 前記金属板抵抗体と前記金属薄膜層と前記トリミング部との表面を覆って絶縁被覆層が設けられている請求項4乃至6のいずれか1項に記載の電流検出用金属板抵抗器。   The metal plate resistor for current detection according to any one of claims 4 to 6, wherein an insulating coating layer is provided so as to cover surfaces of the metal plate resistor, the metal thin film layer, and the trimming portion.
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Publication number Priority date Publication date Assignee Title
JPS5693304A (en) * 1979-12-27 1981-07-28 Fujitsu Denso Method of manufacturing resistor
JPH0582301A (en) * 1990-12-25 1993-04-02 Tamura Seisakusho Co Ltd Surface mounting fixed resistor
JP2004022658A (en) * 2002-06-13 2004-01-22 Rohm Co Ltd Chip resistor having low resistance and its manufacturing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5693304A (en) * 1979-12-27 1981-07-28 Fujitsu Denso Method of manufacturing resistor
JPH0582301A (en) * 1990-12-25 1993-04-02 Tamura Seisakusho Co Ltd Surface mounting fixed resistor
JP2004022658A (en) * 2002-06-13 2004-01-22 Rohm Co Ltd Chip resistor having low resistance and its manufacturing method

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