CN111863365B - Resistance trimming machine and resistance trimming method thereof - Google Patents
Resistance trimming machine and resistance trimming method thereof Download PDFInfo
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- CN111863365B CN111863365B CN201910347776.3A CN201910347776A CN111863365B CN 111863365 B CN111863365 B CN 111863365B CN 201910347776 A CN201910347776 A CN 201910347776A CN 111863365 B CN111863365 B CN 111863365B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
- H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
- H01C17/245—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material by mechanical means, e.g. sand blasting, cutting, ultrasonic treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
- H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
- H01C17/242—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material by laser
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Abstract
The application relates to a resistance trimming machine and a resistance trimming method thereof. The resistance adjusting method comprises the step of obtaining the resistance value deviation rate of the resistor to be repaired. And inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired. And acquiring a resistance adjusting proportion corresponding to the inquired deviation rate interval. And cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion. The deviation rate interval is set corresponding to the resistance value deviation rate of the resistor to be repaired, the resistance adjusting proportion is set corresponding to the deviation rate interval, and the resistance adjusting method performs differential resistance adjustment on the resistor to be repaired according to the difference of the resistance value deviation rates of the resistor to be repaired, so that the resistance adjusting precision is improved.
Description
Technical Field
The application relates to the technical field of resistance trimming, in particular to a resistance trimming machine and a resistance trimming method thereof.
Background
The production process flow of the ceramic sheet resistor comprises the following steps: CAD plate making, screen printing, drying, sintering, resistance adjusting (resistance adjusting), protective layer printing, sintering, resistance deviation rate code printing, sintering, strip folding, grain folding, electroplating, testing and screening, and braid packaging.
At present, the thick film chip resistor with higher resistance deviation rate (more than or equal to 1M omega or less than or equal to 10 omega) can cause the whole distribution of the resistance deviation rate to be uneven due to the unevenness during the screen printing, for example, a batch of resistors with the resistance deviation rate of 2M omega are produced in advance, and the resistance deviation rate of partial resistors is less than 2M omega after the sintering process. Resistance trimming processing needs to be performed on the resistance smaller than 2M omega. In the prior art, a batch of resistors are commonly subjected to resistance adjustment by adopting a resistance adjustment proportion, and the resistance adjustment precision is low.
Disclosure of Invention
Therefore, it is necessary to provide a resistance trimming machine and a resistance trimming method thereof for solving the problems in the prior art that a batch of resistors are generally trimmed by one resistance trimming ratio and the trimming precision is low.
A resistance adjusting method of a resistor comprises the following steps:
and acquiring the resistance value deviation rate of the resistor to be repaired. And inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired. And acquiring a resistance adjusting proportion corresponding to the inquired deviation rate interval. And cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion.
In an embodiment, before the step of obtaining the resistance deviation ratio of the resistor to be repaired, the resistance trimming method further includes obtaining a resistance deviation ratio repair range of the resistor to be repaired. And dividing the repair range into a plurality of deviation rate intervals. And setting a plurality of resistance adjusting proportions which correspond to the deviation rate intervals one by one.
In one embodiment, the step of setting a plurality of the trimming resistance ratios in one-to-one correspondence with the plurality of deviation rate sections includes setting a plurality of first trimming resistance ratios in one-to-one correspondence with the plurality of deviation rate sections. And setting a plurality of second knife resistance adjusting proportions which correspond to the deviation rate intervals one by one.
In one embodiment, in the step of setting a plurality of second knife resistance adjusting ratios corresponding to the plurality of deviation rate sections one to one, the second knife resistance adjusting ratio is 100%.
In one embodiment, the step of obtaining the trimming resistance proportion corresponding to the queried deviation rate interval comprises obtaining the first trimming resistance proportion corresponding to the queried deviation rate interval. And acquiring the second knife resistance adjusting proportion corresponding to the inquired deviation rate interval.
In one embodiment, the step of cutting the resistor to be repaired to a target resistance value according to the resistance trimming ratio includes performing first resistance trimming on the resistor to be repaired according to the first resistance trimming ratio. And performing second resistance trimming on the resistor to be repaired according to the second resistance trimming proportion, so that the resistor to be repaired is trimmed to the target resistance value.
In one embodiment, the step of performing first knife trimming on the resistor to be repaired according to the first knife trimming ratio includes performing first knife cutting on the resistor to be repaired. And detecting the resistance value of the resistor to be repaired, and judging whether the resistance value of the resistor to be repaired is equal to the resistance value corresponding to the first knife resistance trimming proportion. And if the resistance value of the resistor to be repaired is less than the resistance value of the first knife resistance trimming ratio, continuing cutting.
In one embodiment, the step of performing first resistance trimming on the resistor to be repaired according to the first resistance trimming ratio further includes performing second cutting if the resistance value of the resistor to be repaired is equal to the resistance value of the first resistance trimming ratio.
In one embodiment, in the step of dividing the repair range into a plurality of deviation ratio sections, the repair range is divided into a plurality of deviation ratio sections in an equal difference mode.
A resistance trimming machine comprises a first acquisition device, an inquiry device, a second acquisition device and an operation device. The first obtaining device is used for obtaining the resistance value deviation rate of the resistor to be repaired. The inquiring device is electrically connected with the first acquiring device and used for receiving the resistance value deviation rate of the resistor to be repaired and inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired. And the second acquisition device is electrically connected with the query device and is used for acquiring the resistance adjusting proportion corresponding to the queried deviation rate interval. The operating device is electrically connected with the second obtaining device and used for obtaining the resistance adjusting proportion and cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion.
The resistance trimming machine and the resistance trimming method thereof comprise the step of obtaining the resistance value deviation rate of a resistor to be repaired. And inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired. And acquiring a resistance adjusting proportion corresponding to the inquired deviation rate interval. And cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion. The deviation rate interval is set corresponding to the resistance value deviation rate of the resistor to be repaired, the resistance adjusting proportion is set corresponding to the deviation rate interval, and the resistance adjusting method performs differential resistance adjustment on the resistor to be repaired according to the difference of the resistance value deviation rates of the resistor to be repaired, so that the resistance adjusting precision is improved.
Drawings
Fig. 1 is a schematic flow chart of the resistance trimming method provided in an embodiment of the present application;
fig. 2 is a schematic flow chart of the resistance trimming method provided in another embodiment of the present application;
fig. 3 is a schematic flow chart of the resistance trimming method provided in another embodiment of the present application;
fig. 4 is a schematic flow chart of the resistance trimming method provided in another embodiment of the present application;
fig. 5 is a schematic flow chart of the resistance trimming method provided in another embodiment of the present application;
fig. 6 is a schematic structural diagram of the resistance trimming machine provided in another embodiment of the present application.
Reference numerals:
First acquiring means 20
Second acquiring means 40
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, an embodiment of the present application provides a resistance trimming machine 10 and a resistance trimming method thereof, where the resistance trimming method includes:
s100, obtaining the resistance value deviation rate of the resistor to be repaired.
And S200, inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired.
And S300, acquiring a resistance adjusting proportion corresponding to the inquired deviation rate interval.
And S400, cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion.
The resistance adjusting method comprises the step of obtaining the resistance value deviation rate of the resistor to be repaired. And inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired. And acquiring a resistance adjusting proportion corresponding to the inquired deviation rate interval. And cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion. The deviation rate interval is set corresponding to the resistance value deviation rate of the resistor to be repaired, the resistance adjusting proportion is set corresponding to the deviation rate interval, and the resistance adjusting method performs differential resistance adjustment on the resistor to be repaired according to the difference of the resistance value deviation rates of the resistor to be repaired, so that the resistance adjusting precision is improved. The resistance value of the resistor to be repaired is adjusted in the deviation rate interval mode, the same resistor to be repaired is subjected to resistance adjusting processing with the same resistance adjusting proportion, and the working efficiency is improved.
Positive and negative errors often occur in thick film resistors. In order to improve the precision of the thick film circuit, the resistance value of the thick film resistor must be adjusted after the sintering process. If the resistance value exceeds the nominal value, the correction cannot be carried out, but the resistance value is lower than the target value after printing and firing in general, so that the target resistance value is achieved through laser adjustment.
In one embodiment, the resistor is a ceramic chip resistor. The resistance deviation ratio is (true resistance-target resistance)/target resistance × 100%. For example, the actual resistance value of a ceramic chip resistor after sintering is 1.5M Ω, the target resistance value is 2M Ω, and the resistance deviation rate of the ceramic chip resistor is-25% if the ceramic chip resistor is a resistor to be repaired.
In one embodiment, the deviation ratio interval includes a plurality of resistance deviation ratio values. In the last embodiment, the deviation rate intervals are multiple, and the deviation rate interval matching the resistance deviation rate of the resistor to be repaired is queried, that is, the deviation rate interval in which the resistance deviation rate value of the resistor to be repaired is within is determined.
Referring to fig. 2, in an embodiment, before the step S100, the method further includes:
and S010, acquiring the resistance deviation rate repair range of the resistor to be repaired.
And S020, dividing the repair range into a plurality of deviation rate intervals.
And S030, setting a plurality of resistance adjusting proportions in one-to-one correspondence with the deviation rate intervals. In the step S010, the resistance deviation ratio repair range of the resistor to be repaired may be different, and the resistance deviation ratio repair range of the resistor to be repaired may be (-45%) to 0, (-30%) to 0, or other ranges.
And setting a multi-blade repairing resistor according to the resistance deviation rate repairing range of the resistor to be repaired and the structural characteristics of the resistor to be repaired, such as a two-blade repairing resistor, a three-blade repairing resistor or a four-blade repairing resistor. The resistance trimming mode can be laser resistance trimming or other cutting modes.
In one embodiment, the repairing process of the resistor to be repaired is a two-blade repairing resistor, wherein the types of the repairing resistor include "II", "L", "IL", "LI", or "U". The resistance trimming can be laser resistance trimming or other cutting modes. The resistance adjusting method has the advantages that the resistance is repaired by multiple cutters, the repair range of the resistance is expanded, the loss is reduced, and the cost is reduced.
In the step S020, the repair range is divided into a plurality of deviation ratio sections, and the deviation ratio sections may be obtained by equal-difference division, equal-ratio division, irregular numerical division or other division methods.
Referring to fig. 3, in an embodiment, the step S030 includes:
and S031, setting a plurality of first knife resistance adjusting proportions which are in one-to-one correspondence with the plurality of deviation rate intervals.
And S032, setting a plurality of second blade resistance adjusting proportions in one-to-one correspondence with the deviation rate intervals.
The resistance repairing method adopts two-blade resistance repairing, and a plurality of first blade resistance adjusting proportions which are in one-to-one correspondence with the deviation rate intervals are arranged, so that the transverse risk of the resistance to be repaired can be reduced, and the resistance repairing precision is improved.
In an embodiment, in the step S032, the resistance adjusting ratio of the second blade is 100%, that is, after the second blade is used for repairing the resistance, the resistance value of the resistor to be repaired is the target resistance value.
Referring to fig. 3, in an embodiment, the step S300 includes:
s301, acquiring the first knife resistance adjusting proportion corresponding to the inquired deviation rate interval.
S302, obtaining the second knife resistance adjusting proportion corresponding to the inquired deviation rate interval.
Referring to fig. 4, in an embodiment, the step S400 includes:
s410, performing first knife resistance trimming on the resistor to be repaired according to the first knife resistance trimming proportion.
And S420, performing second-blade resistance adjustment on the resistor to be repaired according to the second-blade resistance adjustment proportion, so that the resistor to be repaired is repaired to the target resistance value.
When the number of the resistance trimming knives is different, the resistance trimming proportion of each knife is mainly and respectively obtained. And respectively repairing the resistors according to different resistance adjusting proportions.
Referring to fig. 5, in an embodiment, the step S410 includes:
s411, performing first knife cutting on the resistor to be repaired.
S412, detecting the resistance value of the resistor to be repaired, and judging whether the resistance value of the resistor to be repaired is equal to the resistance value corresponding to the first knife trimming resistance ratio.
And S413, if the resistance value of the resistor to be repaired is less than the resistance value of the first knife resistance trimming ratio, continuing cutting.
In one embodiment, the step S410 further includes:
and S414, if the resistance value of the resistor to be repaired is equal to the resistance value of the first knife resistance adjusting ratio, performing second knife cutting.
In one embodiment, in the step S020, the repair range is divided into a plurality of deviation rate sections.
In one embodiment, the resistance value deviation rate repair range of the resistor to be repaired is obtained to be (-45%) to 0. And dividing the equal difference of the repair range into 5 deviation rate intervals. And setting 5 first knife resistance adjusting proportions which are in one-to-one correspondence with the 5 deviation rate intervals. And setting 5 second knife resistance adjusting proportions which are in one-to-one correspondence with the 5 deviation rate intervals. As shown in the following table:
from the above table, it can be known that the larger the value of the deviation rate interval is, the smaller the first knife resistance trimming ratio is, and the accuracy of resistance trimming is improved. The first knife resistance ratio in the table allows the resistance trimming length to be controlled to 1/3 of the total resistance width, avoiding resistance breakage.
In one embodiment, the resistance to be repaired of the segmented node adopts a repair resistance proportion smaller than the deviation rate interval. For example, the resistance deviation rate of the resistor to be repaired is-36%, and the first-stage resistance repairing proportion is adopted.
In the above embodiment, for example, the resistance deviation ratio of one of the resistors to be repaired is-40%, and the deviation ratio interval matching with the resistance deviation ratio of the resistor to be repaired of-40% is a first interval: -45% to-36%. And obtaining the resistance adjusting proportion corresponding to the inquired deviation rate interval, wherein the first cutter resistance trimming proportion is 75%, and the second cutter resistance trimming proportion is 100%. Namely, the resistance deviation rate after the first knife resistance trimming is-10%. The resistance value of the first knife after resistance trimming is 0.9R0(R0Is a target resistance value), the resistance value of the resistor to be repaired after the second cutter is repaired is the target resistance value. The resistance repairing process of the resistor to be repaired comprises the following steps: and cutting the resistor to be repaired by a first knife. Detecting the resistance value of the resistor to be repaired, and judging whether the resistance value of the resistor to be repaired is equal to the resistance value 0.9R corresponding to the first knife resistance trimming ratio0. If the resistance value of the resistor to be repaired is less than 0.9R of the resistance value of the first knife resistance trimming ratio0Then, the cutting is continued. If the resistance value of the resistor to be repaired is equal to the resistance value of the first knife resistance trimming proportion of 0.9R0And then, performing second knife cutting. The resistance value after the second knife cuts is the target resistance value R0。
Referring to fig. 6, an embodiment of the present application further provides a resistance trimming machine 10, which includes a first obtaining device 20, an inquiring device 30, a second obtaining device 40, and an operating device 50. The first obtaining device 20 is used for obtaining the resistance value deviation ratio of the resistor to be repaired. The query device 30 is electrically connected to the first obtaining device 20, and is configured to receive the resistance value deviation ratio of the resistor to be repaired, and query a deviation ratio interval matched with the resistance value deviation ratio of the resistor to be repaired. The second obtaining device 40 is electrically connected to the querying device 30, and is configured to obtain a resistance trimming ratio corresponding to the queried deviation ratio interval. The operating device 50 is electrically connected to the second obtaining device 40, and is configured to obtain the resistance trimming ratio, and cut the resistance to be repaired to a target resistance value according to the resistance trimming ratio.
The resistance trimming machine 10 provided by the application performs differential resistance trimming according to the resistance value deviation rate of the resistor to be repaired, so that the resistance trimming precision is improved. The resistance value of the resistor to be repaired is adjusted in a mode of a deviation rate interval, the working efficiency is improved, and the production cost is reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A resistance adjusting method of a resistor is characterized by comprising the following steps:
acquiring the resistance value deviation rate of the resistor to be repaired;
inquiring a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired;
acquiring a resistance adjusting proportion corresponding to the inquired deviation rate interval;
cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion;
before the step of obtaining the resistance deviation ratio of the resistor to be repaired, the resistance adjusting method further comprises the following steps:
acquiring a resistance value deviation rate repair range of the resistor to be repaired;
dividing the repair range into a plurality of deviation rate intervals;
setting a plurality of first knife resistance adjusting proportions which are in one-to-one correspondence with the deviation rate intervals;
and setting a plurality of second knife resistance adjusting proportions which correspond to the deviation rate intervals one by one.
2. The resistance trimming method according to claim 1, wherein the second resistance trimming ratio in the step of providing a plurality of second resistance trimming ratios corresponding one-to-one to a plurality of the deviation ratio sections is 100%.
3. The resistance trimming method according to claim 2, wherein the step of obtaining the trimming ratio corresponding to the queried deviation rate interval comprises:
acquiring the first knife resistance trimming proportion corresponding to the inquired deviation rate interval;
and acquiring the second knife resistance adjusting proportion corresponding to the inquired deviation rate interval.
4. The resistance trimming method of the resistor according to claim 3, wherein the step of cutting the resistor to be repaired to a target resistance value according to the resistance trimming ratio comprises:
performing first knife resistance trimming on the resistor to be repaired according to the first knife resistance trimming proportion;
and performing second resistance trimming on the resistor to be repaired according to the second resistance trimming proportion, so that the resistor to be repaired is trimmed to the target resistance value.
5. The method for trimming resistors according to claim 4, wherein the step of trimming resistors to be repaired by a first trimming resistor according to the first trimming resistor ratio comprises:
carrying out first knife cutting on the resistor to be repaired;
detecting the resistance value of the resistor to be repaired, and judging whether the resistance value of the resistor to be repaired is equal to the resistance value corresponding to the first knife resistance trimming proportion or not;
and if the resistance value of the resistor to be repaired is less than the resistance value of the first knife resistance trimming ratio, continuing cutting.
6. The method for trimming resistors according to claim 5, wherein the step of performing the first trimming on the resistor to be repaired according to the first trimming ratio further comprises:
and if the resistance value of the resistor to be repaired is equal to the resistance value of the first knife resistance adjusting ratio, cutting by the second knife.
7. The resistance trimming method according to claim 1, wherein in the step of dividing the repair range into a plurality of the deviation ratio sections, the repair range is divided into a plurality of the deviation ratio sections with equal difference.
8. A resistance trimming machine applied to the resistance trimming method of the resistor according to any one of claims 1 to 7, comprising:
the first acquisition device (20) is used for acquiring the resistance value deviation rate of the resistor to be repaired;
the query device (30) is electrically connected with the first acquisition device (20) and is used for receiving the resistance value deviation rate of the resistor to be repaired and querying a deviation rate interval matched with the resistance value deviation rate of the resistor to be repaired;
the second acquisition device (40) is electrically connected with the inquiry device (30) and is used for acquiring the resistance regulating proportion corresponding to the inquired deviation rate interval;
and the operating device (50) is electrically connected with the second acquiring device (40) and is used for acquiring the resistance adjusting proportion and cutting the resistor to be repaired to a target resistance value according to the resistance adjusting proportion.
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| CN103646739A (en) * | 2013-12-06 | 2014-03-19 | 桂林电子科技大学 | Thin film thermistor and resistance adjusting method thereof |
| CN107134331B (en) * | 2017-04-27 | 2019-08-16 | 广东风华高新科技股份有限公司 | Thermistor resistance trimming method |
| CN109494037A (en) * | 2018-11-19 | 2019-03-19 | 深圳市业展电子有限公司 | A kind of efficient resistance trimming technique of high-precision low resistance alloy Chip-R |
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| GB1363528A (en) * | 1970-11-06 | 1974-08-14 | Western Electric Co | Thin film devices |
| US4469044A (en) * | 1980-09-10 | 1984-09-04 | Cts Corporation | Apparatus and method for producing uniform fired resistors |
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