CN217361281U - Chip resistor for avoiding weak point of electric stress - Google Patents
Chip resistor for avoiding weak point of electric stress Download PDFInfo
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- CN217361281U CN217361281U CN202220510877.5U CN202220510877U CN217361281U CN 217361281 U CN217361281 U CN 217361281U CN 202220510877 U CN202220510877 U CN 202220510877U CN 217361281 U CN217361281 U CN 217361281U
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- groove
- straight line
- line groove
- chip resistor
- fillet
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Abstract
The utility model provides an avoid chip resistor of electric stress weak point, including the two electrodes of mutual disposition, set up between the two electrodes and with the resistive element of two electrode conductive connection with set up the cut groove that cuts on the resistive element, cut the groove and include first straight line groove, second straight line groove and fillet groove, first, second straight line groove mutually perpendicular arranges, the fillet groove is connected between first, second straight line groove tip, first straight line groove is cut into from a side that the resistive element is not connected with the electrode, first, second straight line groove and fillet groove width are the same. The utility model discloses can avoid appearing the weak point of electric stress, the concentration of dispersion or reduction load realizes the electrical property requirement of high power, high load.
Description
Technical Field
The utility model relates to an avoid chip resistor of electric stress weak point.
Background
With the rapid development of the new-generation electronic information technology, chip resistor components develop very rapidly, and become a new-generation chip component with wide application range and good market prospect, which is a concrete embodiment of the development of electronic components towards miniaturization, light weight and high reliability. The chip resistor is used as the most important component in the thick film circuit, and has the characteristics of small product volume, light weight, high resistance precision, small temperature coefficient, suitability for various SMT installation processes, reduced assembly cost, high reliability, high stability and the like. The key process for manufacturing the chip resistor is laser cutting resistance adjustment, because the resistance value of the chip resistor subjected to screen printing deviates from a specified nominal value, the laser cutting resistance value must be adjusted to reach the resistance nominal value and meet the specified resistance value precision.
In the prior art, the laser cutting method of the chip resistor is L-shaped cutting, a first knife is used for cutting into the resistor body from the side surface of the resistor body to a depth of about 1/2 by laser, and the resistance value of the resistor body is corrected and adjusted for the first time, namely coarse adjustment is carried out; the tail of the second knife connected with the first knife is subjected to 90 ℃ right angle turning for laser cutting, and the resistance value of the resistor body is subjected to secondary trimming for fine adjustment; and (4) adjusting resistance through two-step laser cutting to achieve the target resistance value. However, this method has the biggest problem that a weak point of electrical stress occurs at the right-angled corners of the first blade and the second blade, and when the weak point is subjected to a higher voltage load using environment, overload failure occurs at the weak point, so that the laser-cut resistor body is burnt out, and the whole chip resistor body is failed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an avoid chip resistor of electric stress weak point can avoid appearing the weak point of electric stress, and the electric performance requirement of high power, high load is realized to the concentration of dispersion or reduction load.
The utility model discloses a following technical scheme realizes:
a chip resistor avoiding an electric stress weak point comprises two electrodes which are oppositely arranged, a resistor body which is arranged between the two electrodes and is in conductive connection with the two electrodes, and a cutting groove which is arranged on the resistor body, wherein the cutting groove comprises a first straight line groove, a second straight line groove and a circular groove, the first straight line groove and the second straight line groove are arranged in a mutually perpendicular mode, the circular groove is communicated between the end portions of the first straight line groove and the second straight line groove, the first straight line groove is cut into a side face, which is not connected with the electrodes, of the resistor body, and the width of the first straight line groove, the width of the second straight line groove and the width of the circular groove are the same.
Further, the first linear groove length is smaller than 1/2 of the resistor body width, and the second linear groove length is smaller than 1/2 of the resistor body length.
Further, the first straight line groove is cut into the middle of the side face.
Furthermore, the end part of the second linear groove does not exceed the overlapping position of the electrode and the resistor body
Further, the first straight-line groove, the second straight-line groove and the fillet groove are formed by laser cutting.
Further, the chip resistor further includes a ceramic substrate.
The utility model discloses following beneficial effect has:
1. the utility model discloses a cut groove includes first straight line groove, second straight line groove and fillet groove, it is first, second straight line groove mutually perpendicular arranges, the fillet groove is connected first, between the second straight line groove tip, and it is first, second straight line groove is the same with fillet groove width, it is first, no longer be the right angle between the second straight line groove and connect, but connect through the fillet groove, can make instantaneous voltage and instantaneous power evenly distributed, guarantee current density's uniformity, avoid appearing the weak point of electric stress, guarantee the voltage resistance performance of chip resistor, can disperse or reduce the concentration of load, realize the high power, the electrical property requirement of high load.
2. The first straight line groove is cut in from the middle of the side face, and the resistance adjusting effect can be best.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1, ceramic matrix; 2. an electrode; 3. a resistor body; 4. cutting the groove; 41. a first straight line groove; 42. a second linear groove; 43. a fillet groove.
Detailed Description
As shown in fig. 1, a chip resistor for avoiding weak points of electrical stress includes a ceramic substrate 1, two electrodes 2, a resistor body 3, and a cut groove 4. The ceramic substrate 1 is a rectangular parallelepiped, and the two electrodes 2 are oppositely disposed at the left and right ends of the ceramic substrate 1. The resistor 3 is also a rectangular parallelepiped, and is provided on the ceramic substrate 1 between the electrodes 2, and the resistor 3 is electrically connected to the electrodes 2. The cutting groove 4 is provided on the resistor body 3, and specifically includes a first straight groove 41, a second straight groove 42, and an arc-shaped circular bead groove 43, the first straight groove 41 is cut from a side surface of the resistor body 3 not connected to the electrode 2 and extends in a width direction of the resistor body 3, the second straight groove 42 extends in a length direction of the resistor body 3, the second straight groove 42 and the first straight groove 41 are arranged perpendicular to each other, the circular bead groove 43 communicates between ends of the first straight groove 41 and the second straight groove 42, and widths of the first straight groove 41, the second straight groove 42, and the circular bead groove 43 are all the same.
The length of the first linear groove 41 is less than 1/2 of the width of the resistor body 3, the length of the second linear groove 42 is less than 1/2 of the length of the resistor body 3, and the end of the second linear groove 42 is not beyond the overlapping position of the electrode 2 and the resistor body 3. In the present embodiment, the first straight line groove 41 is cut from the middle of the side surface of the resistor 3 in order to maximize the resistance adjustment effect.
The first straight line groove 41, the second straight line groove 42 and the fillet groove 43 are formed by laser cutting, and the power range of the laser cutting is set between 0.3W and 6W, wherein the laser cutting process is the prior art.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited thereby, and all equivalent changes and modifications made within the scope of the claims and the specification should be considered within the scope of the present invention.
Claims (6)
1. A chip resistor for avoiding weak points of electrical stress, characterized in that: the cutting groove comprises a first straight line groove, a second straight line groove and a fillet groove, wherein the first straight line groove, the second straight line groove and the fillet groove are arranged between the first straight line groove and the second straight line groove, the first straight line groove and the second straight line groove are perpendicular to each other, the fillet groove is communicated between the end parts of the first straight line groove and the second straight line groove, the first straight line groove is cut into the side surface, which is not connected with the electrodes, of the resistor body, and the first straight line groove, the second straight line groove and the fillet groove are the same in width.
2. A chip resistor for avoiding weak points of electrical stress according to claim 1, wherein: the first linear groove length is less than 1/2 of the resistor body width, and the second linear groove length is less than 1/2 of the resistor body length.
3. A chip resistor for avoiding weak points of electrical stress according to claim 1, wherein: the first straight line groove is cut into the middle of the side face.
4. A chip resistor avoiding weak points of electrical stress according to claim 1 or 2, wherein: the end part of the second straight line groove does not exceed the lapping position of the electrode and the resistor body.
5. A chip resistor avoiding weak points of electrical stress according to claim 1, 2 or 3, wherein: the first linear groove, the second linear groove and the fillet groove are formed by laser cutting.
6. A chip resistor avoiding weak points of electrical stress according to claim 1, 2 or 3, wherein: the chip resistor further includes a ceramic substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220510877.5U CN217361281U (en) | 2022-03-10 | 2022-03-10 | Chip resistor for avoiding weak point of electric stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220510877.5U CN217361281U (en) | 2022-03-10 | 2022-03-10 | Chip resistor for avoiding weak point of electric stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217361281U true CN217361281U (en) | 2022-09-02 |
Family
ID=83050594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220510877.5U Active CN217361281U (en) | 2022-03-10 | 2022-03-10 | Chip resistor for avoiding weak point of electric stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217361281U (en) |
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2022
- 2022-03-10 CN CN202220510877.5U patent/CN217361281U/en active Active
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