WO2021077792A1

WO2021077792A1 - Alloy resistor

Info

Publication number: WO2021077792A1
Application number: PCT/CN2020/099146
Authority: WO
Inventors: 杨漫雪; 南式荣; 桑玲玲
Original assignee: 南京萨特科技发展有限公司
Priority date: 2019-10-24
Filing date: 2020-06-30
Publication date: 2021-04-29
Also published as: CN110676006A

Abstract

An alloy resistor. The alloy resistor comprises a resistive layer (1), current electrodes (2) connected to two ends of the resistive layer (1), and voltage electrodes (3) connected to the resistive layer (1), wherein the voltage electrodes (3) are not connected to the current electrodes (2). In addition, the current electrodes (2) connected to the resistive layer (1) are larger than the voltage electrodes (3) connected to the resistive layer, that is, the space utilization rate of the current electrodes (2) is improved to facilitate heat dissipation of the current electrodes (2).

Description

An alloy resistor

Technical field

The present invention relates to the technical field of resistors.

Background technique

With the rapid development of the electronics industry, electronic products tend to be highly reliable and multifunctional, and have the characteristics of stable operation, low loss and adaptability to different working environments. This also proposes more for the performance of electronic products related components. Claim.

Resistors, as the most common passive components with the most diversified functions in electronic products, are usually required to have more performance and features. Current electronic products put forward the following requirements for resistors: high power, high precision, low loss, high reliability and strong adaptability. For resistor manufacturers, simple production processes and short process cycles can greatly improve product competitiveness.

The resistance element part of the traditional resistor is a two-electrode part. Two voltage lines are drawn from the wiring of the PCB board and fed back to the IC terminal, thereby using the voltage difference to calculate the current value, but in the past, the electrode size was enlarged due to heat dissipation requirements. Indirectly compresses the wiring position of the voltage line, causing inconvenience in design and use. In addition, in the production process, the resistance value is controlled by the probe for point measurement, which is measured due to the different positions of the probes. The resistance value will have variability. In addition, there are some 4-electrode designs, which divide the electrodes at both ends of the resistor into current electrodes (conductive electrodes) and voltage electrodes (test electrodes). Although the passing current (AC or DC) can be controlled very small, the current electrode will still be polarized, which will affect the accuracy of the test. For this purpose, two test electrodes are used for measurement (such as the Wheatstone bridge method), because there is no current through the output terminal. After knowing the distance between the two poles and the cross-sectional area of the object, the resistivity or conductivity of the object can be calculated. However, the problem in this four-electrode design is that the current electrode and the voltage electrode are separated, thereby compressing the space of the current electrode, resulting in poor heat dissipation of the product.

Therefore, a new technical solution is needed to solve the above-mentioned problems.

Summary of the invention

Objective of the invention: The present invention provides an alloy resistor with a 4-electrode design, and achieves the effect of high space utilization of the current electrode, so as to improve the heat dissipation of the current electrode.

Technical solution: In order to achieve the above-mentioned purpose, the alloy resistor of the present invention can adopt the following technical solutions:

An alloy resistor, comprising a resistance layer, current electrodes connected to both ends of the resistance layer, and voltage electrodes connected to the resistance layer; characterized in that the voltage electrodes are not connected to the current electrodes, and the volume of each current electrode is larger than that of each current electrode. The volume of the voltage electrode.

Beneficial effects: In the present invention, the current electrode connected to the resistance layer is larger than the voltage electrode, that is, the space utilization rate of the current electrode is improved to facilitate the heat dissipation of the current electrode.

Description of the drawings

Fig. 1 is a schematic side view of the alloy resistor in the first embodiment.

Fig. 2 is a schematic bottom view of the alloy resistor in the first embodiment.

Fig. 3 is a schematic side view of the alloy resistor in the second embodiment.

Fig. 4 is a schematic bottom view of the alloy resistor in the second embodiment.

Fig. 5 is a schematic bottom view of the alloy resistor in the third embodiment.

Fig. 6 is a schematic bottom view of the alloy resistor in the fourth embodiment.

Fig. 7 is a schematic bottom view of the alloy resistor in the fifth embodiment.

Detailed ways

Example one

Please refer to Figure 1 and Figure 2, the alloy resistor provided in this embodiment includes a resistance layer 1, a current electrode connected to both ends of the resistance layer 1, a voltage electrode 3 connected to the resistance layer 1; the voltage electrode 3 Not connected to current electrode 2. The current electrode 2 is larger than the voltage electrode 3. Wherein, the current electrode 2 and the voltage electrode 3 located at the same end of the resistance layer 1 are both connected to the bottom surface of the resistance layer 1. Moreover, the width of the current electrode 2 is the same as the width 1 of the resistance layer, and the voltage electrode 3 does not exceed the width of the resistance layer. The end surface of the current electrode 2 and the end surface of the resistance layer 1 are coplanar. In this way, the top view of the overall resistor product is a regular square, and the overall structure is compact and regular, which is conducive to the coordination with the PCB board wiring or other components on the PCB board. Among them, in order to reasonably improve the space utilization rate on the bottom surface of the resistance layer 1, the bottom surface of the current electrode 2 is L-shaped, and the bottom surface of the voltage electrode 3 is square and is located in the L-shaped notch of the current electrode 2. In this way, the current electrode 2 can be extended in the space not involved by the voltage electrode 3, which is beneficial to increase the volume of the current electrode 2 and stand up for heat dissipation. In the present invention, the volume of each current electrode 2 is greater than the volume of each voltage electrode 3. The current electrode requires a larger volume to increase the heat dissipation area. The voltage electrode mainly measures the voltage signal after the current passes through the resistor body. The voltage electrode does not need to withstand a large current like the current electrode, and the voltage electrode does not need a higher heat dissipation function. Therefore, when the space of the electrode position is limited, the volume of the current electrode 2 at the same end of the resistive layer is larger than the volume of the voltage electrode 3.

Example two

As shown in FIG. 3, in this embodiment, the current electrode 2 and the voltage electrode 3 located at the same end of the resistance layer 1 are both connected to the end surface of the resistance layer 1. And the width of the current electrode 2 is the same as the width of the resistance layer 1, and similarly, the volume of each current electrode 2 is greater than the volume of each voltage electrode 3. In order to increase the volume of the current electrode 2, the bottom surface of the current electrode 2 is L-shaped, and the bottom surface of the voltage electrode 3 is square and located in the L-shaped notch of the current electrode 2. Although the volume of the current electrode 2 is increased, the length of the overall product is not increased. Instead, the current electrode 2 is bent on the outside of the current electrode 2 and extends in the width direction to form an L-shape.

In this embodiment, as shown in FIG. 4, the voltage electrodes 3 provided at both ends of the resistance layer 1 may be located at positions where the two ends of the resistance layer 1 are connected to the same side surface of the resistance layer 1.

Example three

In this embodiment, the current electrode 2 and the voltage electrode 3 located at the same end of the resistance layer 1 are both connected to the end surface of the resistance layer 1. And the width of the current electrode 2 is the same as the width of the resistance layer 1, and similarly, the volume of each current electrode 2 is greater than the volume of each voltage electrode 3. In order to increase the volume of the current electrode 2, the bottom surface of the current electrode 2 is L-shaped, and the bottom surface of the voltage electrode 3 is square and located in the L-shaped notch of the current electrode 2. Although the volume of the current electrode 2 is increased, the length of the overall product is not increased, but is bent on the outside of the current electrode 2 to extend in the width direction to form an L-shape. The difference from the second embodiment is that, as shown in FIG. 5, among the voltage electrodes 3 at both ends of the resistance layer 1, one voltage electrode 3 is located at a position where one end of the resistance layer 1 is in contact with one side of the resistance layer 1; the other voltage electrode 3'is located at the position where the other end of the resistance layer 1 and the other side of the resistance layer 1 are connected. To deal with different PCB routing requirements.

Example four

As shown in FIG. 6, in this embodiment, among the current electrode 2 and the voltage electrode 3 located at the same end of the resistance layer 1, the current electrode 2 is connected to the bottom surface of the resistance layer 1, or the current electrode 2 is connected to the end surface of the resistance layer 1. on. The voltage electrode 3 is connected to the side surface of the resistance layer 1, and the two voltage electrodes 3 are connected to the same side surface of the resistance layer 1. The volume of each current electrode 2 is greater than the volume of each voltage electrode 3. In this embodiment, because the voltage electrode 3 is connected to the side surface of the resistance layer 1, it does not affect the space where the current electrode 2 is connected at the end of the resistance layer 1. The current electrode 2 can be made as large as possible under the requirement of compact structure. Improve the heat dissipation effect.

Example five

This embodiment is roughly the same as the fourth embodiment. The difference is that, as shown in FIG. 7, the two voltage electrodes 3 are connected to the two sides of the resistance layer 2, that is, the two voltage electrodes 3 are separated from the resistance layer 1. To meet different PCB routing requirements.

The present invention has many methods and ways to specifically realize the technical solution, and the above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. All the components that are not clear in this embodiment can be implemented using existing technology.

Claims

An alloy resistor, comprising a resistance layer, current electrodes connected to both ends of the resistance layer, and voltage electrodes connected to the resistance layer; characterized in that the voltage electrodes are not connected to the current electrodes, and the volume of each current electrode is larger than that of each current electrode. The volume of the voltage electrode.
The alloy resistor according to claim 1, wherein the current electrode and the voltage electrode at the same end of the resistance layer are both connected to the bottom surface of the resistance layer, and the width of the current electrode is the same as the width of the resistance layer, and the width of the current electrode is the same as that of the resistance layer. The end surface is coplanar with the end surface of the resistance layer, the bottom surface of the current electrode is L-shaped, and the bottom surface of the voltage electrode is square and is located in the L-shaped notch of the current electrode.
The alloy resistor according to claim 1, wherein the current electrode and voltage electrode at the same end of the resistance layer are both connected to the end face of the resistance layer, and the width of the current electrode is the same as the width of the resistance layer, and the width of the current electrode is the same as that of the resistance layer. The bottom surface is L-shaped, and the bottom surface of the voltage electrode is square and is located in the L-shaped notch of the current electrode.
The alloy resistor according to claim 1, wherein among the current electrode and the voltage electrode at the same end of the resistance layer, the current electrode is connected to the bottom surface or end surface of the resistance layer, and the voltage electrode is connected to the side surface of the resistance layer And the two voltage electrodes are connected to the same side surface of the resistance layer.
The alloy resistor according to claim 1, wherein among the current electrode and the voltage electrode at the same end of the resistance layer, the current electrode is connected to the bottom surface or end surface of the resistance layer, and the voltage electrode is connected to the side surface of the resistance layer And the two voltage electrodes are respectively connected to the two sides of the resistance layer.
3. The alloy resistor according to claim 3, wherein the voltage electrodes at both ends of the resistance layer are located at positions where both ends of the resistance layer are connected to the same side surface of the resistance layer.
The alloy resistor according to claim 3, wherein among the voltage electrodes at both ends of the resistance layer, one voltage electrode is located at a position where one end of the resistance layer is in contact with one side of the resistance layer; the other voltage electrode is located at the other end of the resistance layer The position where it meets the other side of the resistive layer.
The alloy resistor according to claim 7, wherein the outer side of the current electrode is bent and extends in the width direction to form an L-shape.
The alloy resistor according to any one of claims 1 to 8, wherein the width of the current electrode is the same as the width of the resistance layer, and the voltage electrode does not exceed the width of the resistance layer.
9. The alloy resistor of claim 9, wherein the end face of the current electrode and the end face of the resistance layer are coplanar up and down.