CN219738658U - Metal plate resistor substrate and finished product thereof - Google Patents
Metal plate resistor substrate and finished product thereof Download PDFInfo
- Publication number
- CN219738658U CN219738658U CN202320912431.XU CN202320912431U CN219738658U CN 219738658 U CN219738658 U CN 219738658U CN 202320912431 U CN202320912431 U CN 202320912431U CN 219738658 U CN219738658 U CN 219738658U
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- substrate
- resistor
- groove
- metal plate
- metal
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- 239000000758 substrate Substances 0.000 title claims abstract description 69
- 239000002184 metal Substances 0.000 title claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 63
- 238000004806 packaging method and process Methods 0.000 claims abstract description 24
- 238000005538 encapsulation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000009713 electroplating Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 27
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000011241 protective layer Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Abstract
The utility model discloses a metal plate resistor substrate and a finished product thereof, which comprises a groove processed on the surface of a substrate, wherein the groove extends along the length direction of the substrate, two sides of the groove are respectively provided with a convex strip, and the convex strips are used as electrodes at two ends when the substrate is cut into Cheng Dianzu devices. And a plurality of cutting holes are arranged in a row in the groove, and the plurality of cutting holes are strip-shaped holes which extend vertically to the length direction of the substrate, so that the substrate is provided with a plurality of resistors connected between the two raised strips. The substrate can be provided with a metal plate resistor which is firstly packaged, the packaging layer is enclosed on the top surface, the bottom surface and the two side surfaces of the resistor body, then cut from the convex strip parts at the two ends of the cutting hole and separated into a sheet shape, thereby achieving the purposes of avoiding the exposure of the two sides of the resistor, avoiding the electroplating heightening electrode process and the like.
Description
Technical Field
The present utility model relates to the technical field of resistors, and more particularly to a metal plate resistor substrate for surface mounting and a finished product structure improvement thereof.
Background
The present resistor is divided into various types according to functions, shapes, resistor materials and uses, there are fixed resistors for mounting in a circuit, semi-fixed resistors for trimming a circuit, and variable resistors capable of changing resistance values. A number of fixed resistors used in circuit boards are also classified into lead type resistors and surface mount type resistors, one of which is commonly known as a metal plate resistor. The construction of a metal plate resistor generally has a sheet of metal alloy plate, electrodes for Surface Mounting (SMT) on a circuit board are provided at both ends thereof, portions between the electrodes at both ends have different resistance values according to the size of the metal plate thereof, and are encapsulated with a ceramic layer and a protective layer.
There are various methods for manufacturing a metal plate resistor according to the structure thereof, as shown in fig. 1, in which a groove 101 is cut on an alloy substrate 100 in the shape of a long sheet, and the depth of the groove 101 is related to the resistance of the rest. Then, the protective layer 200 is encapsulated on the upper and lower surfaces of the groove 101, and the protective layer 200 is cut after printing a standard number on the surface thereof, wherein the cutting direction is perpendicular to the extending direction of the groove 101, so that the long sheet-shaped alloy substrate 100 can be cut into the sheet-shaped metal sheet resistor 300. However, since the protection layer 200 is previously applied in the manufacturing method of the metal plate resistor, after the metal plate resistor 300 is cut, both sides of the metal plate resistor 300 are exposed by losing the protection layer 200, and thus the resistance value is easily unstable or short-circuited due to the influence of external factors in the circuit.
As shown in fig. 2, another metal plate resistor structure and manufacturing method, a fishbone-shaped outline is punched on a conductive alloy sheet 400, two ends of the outline are used as electrodes 401, a resistor 402 and a packaging part are arranged in the middle, when a protective layer 200 is packaged on the upper, lower and two sides of the resistor 402, the electrodes 401 at two ends cannot contact with circuit contacts when Surface Mount (SMT) because the protective layer 200 has a certain thickness, and an electroplated layer 403 or a conductor is applied on the bottom surfaces of the electrodes 401 at two ends after packaging, so that the electrodes 401 at two ends are higher than the surface of the protective layer 200, thereby obviously increasing the manufacturing cost of the metal plate resistor structure and manufacturing method by at least one electroplating or conductor applying process.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the inventors have felt that they are not perfect, and have focused their attention to study and overcome the shortcomings of the prior art by developing another metal sheet resistor substrate based on their accumulated experiences in the industry for many years.
The utility model mainly aims to provide a metal plate resistor substrate and a finished product thereof, which achieve the effects that the two sides of the metal plate resistor are not exposed when the metal plate resistor is cut into a metal plate resistor, and the electrodes at the two ends are not plated or lifted by a patch.
In order to achieve the above object, the present utility model provides a metal sheet resistor substrate for manufacturing a plurality of metal sheet resistors, comprising:
a groove is concavely arranged on the surface of a substrate, the groove linearly extends along the length direction of the substrate, a convex strip is respectively arranged on two sides of the groove, and the convex strip is used as electrodes at two ends of a metal plate resistor when the substrate cuts the metal plate resistor;
the groove is internally provided with a plurality of cutting holes which are arranged in a row, each cutting hole is a strip-shaped hole which extends vertically to the length direction of the substrate, and the cutting holes penetrate from the bottom surface of the groove to the bottom surface of the substrate, so that the substrate is provided with a plurality of resistors connected between two raised strips;
and the substrate can be used for implementing a packaging layer on the resistor body, wherein the packaging layer surrounds the top surface, the bottom surface and the two side surfaces of the resistor body, and then the resistor body is cut from the parts extending from the two ends of the cutting hole to the convex strips and separated into a sheet-shaped metal plate resistor.
In the metal plate resistor substrate, the groove is a right-angle groove with a ㄩ -shaped section.
In the above metal plate resistor substrate, both ends of the cut hole extend to the inner walls of both sides of the groove.
In the above metal plate resistor substrate, the substrate is a straight strip-shaped metal substrate.
In order to achieve the above objective, the present utility model further provides a finished product of the metal plate resistor substrate, which comprises the metal plate resistor substrate and a packaging layer, wherein the packaging layer surrounds the top surface, the bottom surface and the two side surfaces of the resistor body, and the thickness of the bottom surface of the packaging layer does not exceed the depth dimension from the surface of the substrate to the bottom surface of the groove.
According to the metal plate resistor substrate and the finished product thereof, through the structural design of the substrate with the grooves and the cutting holes, a plurality of resistors which are arranged and connected between the convex strips on two sides of the substrate are formed, and the resistance value of the resistor depends on the depth of the grooves and the size of the cutting holes (namely the width of the resistor). Therefore, when the encapsulation layer is implemented, the insulating encapsulation material can be enclosed on the top surface, the bottom surface and the two side surfaces of the resistor body, and then even if the metal plate resistor finished product is cut from the convex strip part connected with each resistor body, the encapsulation layer which is enclosed on the two side surfaces of the resistor body can not be cut, so that the effect of preventing the side edges of the resistor body from being exposed can be achieved.
Furthermore, the groove processed in advance has a certain depth, even if the top surface, the bottom surface and the two side surfaces of the resistor body are provided with the packaging layer, the depth of the groove is larger than the thickness of the packaging layer, and the thickness of the packaging layer is prevented from exceeding the electrode (convex strip) at the two ends, so that the conventional electroplating or electrode heightening process of the patch is not required to be carried out before or after packaging is finished and cutting into a finished product of the metal plate resistor, and the manufacturing cost is prevented from being increased.
Drawings
Fig. 1 is a schematic diagram of a conventional first metal plate resistor structure and a manufacturing method thereof.
Fig. 2 is a schematic diagram of a conventional second metal plate resistor structure and a manufacturing method.
Fig. 3 is a perspective view of a preferred embodiment of a metal plate resistor substrate according to the present utility model.
FIG. 4 is a schematic diagram of a finished metal sheet resistor substrate and a cut metal sheet resistor according to the present utility model.
Symbol description:
10 substrate
11 groove
12 raised strips
13 cutting hole
14 resistor body
20 packaging layer
21 gap(s)
30 Metal sheet resistor
31 electrode
Detailed Description
The embodiment of the attached drawings is used for describing the technical characteristics, functions and purposes of the utility model in detail as follows:
as shown in fig. 3, a metal plate resistor substrate according to the present utility model is used to form a plurality of metal plate resistors, and the preferred embodiment of the present utility model comprises a substrate 10, wherein the substrate 10 is a metal substrate (e.g. copper alloy plate) having a straight strip shape, and a groove 11 is milled down on the upper surface of the substrate, and the groove 11 is a right-angle groove having a ㄩ cross section, such that the groove 11 extends linearly to two ends along the length direction of the substrate 10, and a structure is formed in which a protrusion 12 is provided on each of two sides of the groove 11, and the protrusion 12 can be used as an electrode 31 at two ends of the metal plate resistor 30 when the substrate 10 is cut into a metal plate resistor 30 (as shown in fig. 4).
As shown in fig. 3, a plurality of cutting holes 13 are punched or cut in advance in the groove 11, each cutting hole 13 is a bar-shaped hole extending perpendicular to the longitudinal direction of the substrate 10, each cutting hole 13 extends from the bottom surface of the groove 11 to the bottom surface of the substrate 10, and both ends of the cutting hole 13 extend to the inner walls of both sides of the groove 11, so that the substrate 10 is formed with a plurality of resistors 14 connected between the two protruding strips 12. The resistance value (Ohm) of the resistor 14 depends on the thickness of the substrate 10 and the depth of the recess 14 and the size of the cut hole 13, i.e. the width of the resistor 14, so that after the metal plate resistor substrate is prefabricated, other packaging processes can be performed later.
As shown in fig. 4, the substrate 10 can be used to continuously apply a packaging layer 20 on each resistor 14 before the finished product is cut, however, one surface of the resistor 14 can also be applied with other structures according to requirements, and finally, the packaging process of the packaging layer 20 is performed, so that each packaging layer 20 surrounds the top surface, the bottom surface and the two side surfaces of each resistor 14, and a gap 21 is formed between every two adjacent packaging layers 20. After the resistor 14 is encapsulated by the encapsulation layer 20, the resistor may be cut from the portions extending from the two ends of the cutting hole 13 to the convex strips 12, and the encapsulation layer 20 may not be cut due to the gaps 21, so that the resistor is separated into a sheet-shaped metal sheet resistor 30.
The utility model further provides a finished product of the metal plate resistor substrate, which comprises the metal plate resistor substrate manufactured by the structure and the manufacturing method and a packaging layer 20, wherein the packaging layer 20 is made of insulating materials, so that the packaging layer 20 surrounds the top surface, the bottom surface and the two side surfaces of the resistor body 14, and the thickness of the packaging layer 20 does not exceed the depth dimension from the surface of the substrate 10 to the bottom surface of the groove 11, therefore, the conventional electroplating or the surface mount electrode heightening process is not needed before or after the packaging is finished and the cutting into the finished product of the metal plate resistor 30 is carried out, and the manufacturing cost is avoided.
As shown in fig. 4, when the encapsulation layer 20 is applied, the metal plate resistor substrate of the present utility model can make the top surface, the bottom surface and the two side surfaces of the resistor 14 surrounded by the insulating encapsulation material, and then even if the metal plate resistor 30 is cut from the portion of the convex strip 12 connected with each resistor 14, the encapsulation layer 20 covering the two side surfaces of the resistor 14 will not be cut, so that the effect of preventing the side edges of the resistor from being exposed can be achieved.
The present utility model has been disclosed in the foregoing in terms of preferred embodiments, however, it will be understood by those skilled in the art that the embodiments are merely illustrative of the present utility model and should not be construed as limiting the scope of the present utility model. It should be noted that all changes and substitutions equivalent to the embodiment are intended to be included in the scope of the present utility model. Accordingly, the scope of the utility model is defined by the appended claims.
Claims (5)
1. A sheet metal resistor substrate for making a plurality of sheet metal resistors comprising:
a groove is concavely arranged on the surface of a substrate, the groove linearly extends along the length direction of the substrate, two sides of the groove are respectively provided with a convex strip, and the convex strips are used as electrodes at two ends of a metal plate resistor when the substrate is cut into the metal plate resistor;
a plurality of cutting holes are arranged in the groove in a row, each cutting hole is a strip-shaped hole which extends vertically to the length direction of the substrate, and penetrates from the bottom surface of the groove to the bottom surface of the substrate, so that the substrate is provided with a plurality of resistors connected between two raised strips;
and the substrate can be used for implementing a packaging layer on the resistor body, wherein the packaging layer surrounds the top surface, the bottom surface and the two side surfaces of the resistor body, and then is cut from the parts extending from the two ends of the cutting hole to the convex strips and separated into a sheet-shaped metal plate resistor.
2. The sheet metal resistor substrate of claim 1, wherein the grooves are right angle grooves having a cross section of ㄩ.
3. The sheet metal resistor substrate of claim 2, wherein both ends of the cutout hole extend to inner walls of both sides of the recess.
4. A sheet metal resistor substrate of claim 3, wherein the substrate is a straight strip-like metal substrate.
5. A finished metal sheet resistor substrate comprising the metal sheet resistor substrate of any one of claims 1 to 4, and an encapsulation layer surrounding the top, bottom and both sides of the resistor body, the thickness of the bottom of the encapsulation layer not exceeding the depth dimension from the surface of the substrate to the bottom of the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320912431.XU CN219738658U (en) | 2023-04-21 | 2023-04-21 | Metal plate resistor substrate and finished product thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320912431.XU CN219738658U (en) | 2023-04-21 | 2023-04-21 | Metal plate resistor substrate and finished product thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219738658U true CN219738658U (en) | 2023-09-22 |
Family
ID=88029107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320912431.XU Active CN219738658U (en) | 2023-04-21 | 2023-04-21 | Metal plate resistor substrate and finished product thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219738658U (en) |
-
2023
- 2023-04-21 CN CN202320912431.XU patent/CN219738658U/en active Active
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