CN203055580U - High-precision surface mounting resistor - Google Patents
High-precision surface mounting resistor Download PDFInfo
- Publication number
- CN203055580U CN203055580U CN 201320019349 CN201320019349U CN203055580U CN 203055580 U CN203055580 U CN 203055580U CN 201320019349 CN201320019349 CN 201320019349 CN 201320019349 U CN201320019349 U CN 201320019349U CN 203055580 U CN203055580 U CN 203055580U
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- China
- Prior art keywords
- surface mounting
- precision
- resistor
- base body
- resistive film
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a high-precision surface mounting resistor comprising a ceramic base body, wherein a resistive film covers the periphery of the ceramic base body; electrode covers are arranged at the two ends of the ceramic base body; a protective film covers the surface of the resistive film between the electrode covers at the two ends; the ceramic base body is cylindrical; and an Ni and Cr alloy film is used as the resistive film. The high-precision surface mounting resistor disclosed by the utility model has the advantages of small size, low cost, good heat radiation performance, wide resistance value range and high resistance value precision; the precision can be +/-0.02%; the temperature coefficient is small and can be +/-3*10<-6>/K; the work is stable and reliable; the stability can be +/-0.5% under environmental conditions that the temperature is 125 DEG C and the work is lasted for 1,000 hours; the high-precision surface mounting resistor can be conveniently and rapidly mounted in a circuit board by utilizing surface mounting technology equipment and can be adapted to the development of a current surface mounting technology.
Description
Technical field
The utility model relates to electronic equipment and uses the metal film resistor field, particularly a kind of high-accuracy surface mount electrical resistor.
Background technology
Along with the fast development of electronics industry and popularizing of surface mount (SMT) technology, more and more to the surface adhered with electronic component demand, resistor also is like this, existing resistor goes between based on band, comprise that ceramic matrix and ceramic matrix circumferentially are covered with resistive film, the two ends extraction electrode lead-in wire of ceramic matrix, the resistor volume of this band lead-in wire is big, precision is low, inapplicable in, high-end electronic devices mount requirement, at present domestic have kind of a surface-pasted chip resistor, do not go between, silver-plated as termination electrode at two ends, the cost height is because the resistive layer area of slice structure is less, the power of resistor is just little, Standard resistance range is also narrow, and precision is low, job insecurity can not adapt to the needs that high-end electronic product develops.
The utility model content
The purpose of this utility model provide that a kind of adaptation surface mount (SMT) technology installs high-accuracy surface mount electrical resistor, Standard resistance range is wide, power is big and precision is high, widened application, adapted to the requirement of surface mount automation, not only improve efficiency of assembling, and reduce production costs.
The purpose of this utility model is achieved by the following technical programs; a kind of high-accuracy surface mount electrical resistor; comprise ceramic matrix; ceramic matrix circumferentially is covered with resistive film; it is characterized in that: the two ends of described ceramic matrix are provided with electrode cap, and the resistive film surface between the two end electrodes lid is covered with diaphragm.
Described ceramic matrix is cylinder, and described resistive film is the Ni-Cr alloy film.
Beneficial effect: the utility model product is compared with traditional leaded type conventional, electric-resistance device, has that volume is little, a perfect heat-dissipating, resistance accuracy height, can accomplish ± 0.02%; Temperature coefficient is little, can accomplish ± 3 * 10
-6/ K; Working stability is reliable, and stability can accomplish ± 0.5%(is 125 ℃ of temperature, under the 1000 hours environmental conditions of working); Be convenient to characteristics such as surface mount, adapted to the development of current surface mounting technology.Be mainly used in various middle and high end electronic device field such as hybrid integrated circuit, precise electronic measurement and control instrument instrument, Aeronautics and Astronautics, automotive electronics, utilize surface mounting technology equipment to be mounted in the circuit board quickly and easily.Compare with existing chip surface mount electrical resistor; adopt electrode cap to replace silver-plated termination electrode; reduce production costs; adopt the cylinder ceramic matrix; increase the resistive layer area, improve heat dispersion and widen Standard resistance range, the setting of diaphragm prevents that the electric resistance alloy rete is difficult for oxidation and mechanical damage; solve general surface and mounted that chip resistor power is little, precision is not high, the problem of job insecurity, thereby improved high accuracy, high stable and the high reliability of electronic equipment.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1; high-accuracy surface mount electrical resistor provided by the utility model comprises cylindrical ceramic matrix 1; the material of used ceramic matrix is high alumina content (2%CaO-96%Al2O3-2%SiO2); have high temperature resistant; unit volume coefficient of heat transfer height; the little premium properties of linear expansion coefficient; be used for from the teeth outwards vacuum plating Ni-Cr resistance alloys film 2; resistive film is the key position of resistor; Standard resistance range according to resistor; resistance accuracy; temperature coefficient selects for use rare-earth element modified Ni-Cr alloy material to form the resistance blank by high vacuum coating; contain the Al-Si-Fe trace element in the Ni-Cr alloy material; the two ends of resistance blank install electrode cap 3 additional; electrode cap 3 is squeezed in the two ends of ceramic matrix 1 by tight fit; electrode cap 3 is that the conducting position of resistor also is to mount the position; its material is to make of thick 0.3～0.4 millimeter sheet metal or copper strip; electroplating surface one deck tin; solderability will be got well; can bear 350 ℃ high temperature; resistive film surface between the two end electrodes lid is covered with diaphragm 4; diaphragm 4 is used for the protective resistance film; to prevent that the electric resistance alloy metallic diaphragm is difficult for oxidation and mechanical damage; its coating material adopts high temperature resistant; the organosilicon coating of anti-the high humidity is sealed; can be in temperature 〉=150 ℃, long-term work under relative humidity 〉=85% environmental condition.
The utility model product important technological parameters: overall dimension: Φ 1.5 * 3.5mm; Φ 1.8 * 5.8mm; Φ 2.0 * 8.0mm; Rated power (70 ℃): 1/6W, 1/4W, three kinds of different capacities of 1/2W; Standard resistance range: 10 Ω～10M Ω; Full accuracy: ± 0.02%; Minimum temperature coefficient: ± 3 * 10
-6/ K; Maximum working voltage: 200V～250V; Temperature range :-65 ℃～150 ℃.
Above-described embodiment is as preferred embodiments of the present utility model; describe technical conceive of the present utility model and essential implementation in detail; be not to be that protection range of the present utility model is limited; all any simple modification and equivalent structure transformation or modifications of doing according to the utility model spirit essence all should be encompassed within the protection range of the present utility model.
Claims (2)
1. a high-accuracy surface mount electrical resistor comprises ceramic matrix, and ceramic matrix circumferentially is covered with resistive film, it is characterized in that: the two ends of described ceramic matrix are provided with electrode cap, and the resistive film surface between the two end electrodes lid is covered with diaphragm.
2. a kind of high-accuracy surface mount electrical resistor according to claim 1, it is characterized in that: described ceramic matrix is cylinder, described resistive film is the Ni-Cr alloy film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320019349 CN203055580U (en) | 2013-01-15 | 2013-01-15 | High-precision surface mounting resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320019349 CN203055580U (en) | 2013-01-15 | 2013-01-15 | High-precision surface mounting resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055580U true CN203055580U (en) | 2013-07-10 |
Family
ID=48738508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320019349 Expired - Lifetime CN203055580U (en) | 2013-01-15 | 2013-01-15 | High-precision surface mounting resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203055580U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051099A (en) * | 2014-06-27 | 2014-09-17 | 深圳市业展电子有限公司 | Production method of high-power precision alloy SMD (surface mount device) resistor |
| CN108899143A (en) * | 2018-07-16 | 2018-11-27 | 湖南龙建达电子科技股份有限公司 | Epithelium patch resistor and preparation method thereof |
-
2013
- 2013-01-15 CN CN 201320019349 patent/CN203055580U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051099A (en) * | 2014-06-27 | 2014-09-17 | 深圳市业展电子有限公司 | Production method of high-power precision alloy SMD (surface mount device) resistor |
| CN108899143A (en) * | 2018-07-16 | 2018-11-27 | 湖南龙建达电子科技股份有限公司 | Epithelium patch resistor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 233010 Bengbu high tech Industrial Development Zone, Anhui, Xing Zhong Road, No. 818 Patentee after: BDS ELECTRONICS Inc. Patentee after: BENGBU SHUANGHUAN ELECTRONICS GROUP CO.,LTD. Address before: 233010 Bengbu high tech Industrial Development Zone, Anhui, Xing Zhong Road, No. 818 Patentee before: BDS ELECTRONICS INC. Patentee before: BENGBU DOUBLE CIRCLE ELECTRONICS GROUP Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |