CN213366297U - Laser resistance adjusting system - Google Patents
Laser resistance adjusting system Download PDFInfo
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- CN213366297U CN213366297U CN202021521136.4U CN202021521136U CN213366297U CN 213366297 U CN213366297 U CN 213366297U CN 202021521136 U CN202021521136 U CN 202021521136U CN 213366297 U CN213366297 U CN 213366297U
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Abstract
The invention provides a laser resistance adjusting system, comprising: the laser source generating unit provides laser required by trimming; the probe and tool unit is used for accommodating an electronic element to be tested and adjusting the focusing position of the probe and the electronic element to be tested; the galvanometer scanning unit is used for setting a scanning range and positioning precision; the measuring unit measures and detects external resistance or voltage, controls the laser source generating unit to switch on and off the laser, and returns the measuring result to the motion control unit; the motion control unit controls the target to be measured according to the measurement result; the coaxial positioning unit positions the focus of the laser beam emitted by the laser source generating unit to a processing position; and the video display unit is used for setting parameters of the visual field range and the visual positioning precision. In the parameter trimming process, the resistance value of the resistor to be measured is monitored in real time, and the laser is turned off when the measured value reaches the target value, so that the measuring precision is high, the labor is saved, the efficiency is improved, and the physical quantities such as the resistor, the voltage, the current, the electric signal and the like can be trimmed.
Description
Technical Field
The invention relates to the field of laser application, in particular to a laser resistance trimming system.
Background
As electronic products continuously pursue higher and higher requirements for intellectualization, multifunction and miniaturization, electronic components are required to be developed towards the direction of intellectualization, multifunction and miniaturization, so that the application of the adjustable resistor in various electronic devices is increasingly wide.
Due to inherent error of screen printing operation, non-uniformity of substrate surface and non-repeatability of sintering conditions, positive and negative errors often occur in thick film resistors, if the resistance value exceeds a nominal value, correction cannot be performed, and the resistance value is lower than about 30% of a target value after printing and firing in general, so that the target value is reached through laser adjustment, and in order to improve the precision of a thick film circuit, resistance value correction is required.
The Chinese patent application number 2017114584717 discloses a chip resistor laser resistance-adjusting system, and the technical scheme adopts 355nm short-wavelength laser to process a chip resistor sensitive to the thermal effect, so as to realize the resistance-adjusting purpose of the chip resistor. The scheme is only suitable for the resistance adjusting process of the chip resistor sensitive to the heat effect, can not be applied to various thin film resistors or thick film resistors, and can not be applied to the adjustment of parameters such as voltage, current, time, frequency, pressure and the like.
Therefore, there is a need to develop a laser trimming system that overcomes the drawbacks of the prior art.
Disclosure of Invention
In order to solve the defect of limited application range in the prior art, the invention provides a laser resistance trimming system, which adopts the following technical scheme:
a laser trimming system comprising:
the laser source generating unit is used for providing laser required by trimming the electronic element;
the probe and tool unit is used for accommodating an electronic element to be tested and adjusting the focusing position of the probe and the electronic element to be tested;
the galvanometer scanning unit is used for setting the scanning range and the positioning precision of a working area;
the measuring unit is used for measuring and detecting external resistance or voltage, controlling the laser source generating unit to switch on and off the laser, and returning the measuring result to the motion control unit;
a coaxial positioning unit for positioning a focal point of the laser beam emitted by the laser source generating unit to a processing position;
the motion control unit is used for controlling the target to be measured according to the measurement result of the measurement unit;
and the video display unit is used for setting parameters of the visual field range and the visual positioning precision.
Further, the laser wavelength is 532nm or 1064 nm.
Further, the scanning range is 102mm × 102 mm.
Further, the visual field range is 8mm 6 mm.
Further, the visual positioning precision is +/-10 um.
Furthermore, the measuring unit measures the resistance in a two-wire or four-wire mode.
Furthermore, the resistance trimming can be any one of voltage, current, time, frequency and pressure.
The laser resistance trimming system can monitor the resistance value of the resistor to be measured in real time in the process of trimming the parameters of the electronic element, and can turn off the laser when the measured value reaches the target value, thereby having higher measurement precision, saving manpower, improving efficiency, and trimming physical quantities such as resistance, voltage, current, electric signals and the like.
Drawings
FIG. 1: the invention discloses a composition schematic diagram of a laser resistance trimming system.
Detailed Description
The laser resistance trimming system of the present invention is described below with reference to examples, and it should be understood that the examples are only for explaining the best mode of the present invention and are not intended to limit the scope of the present invention.
Referring to fig. 1, the schematic diagram of the laser resistance trimming system of the present invention comprises a laser source generating unit 101, a probe and tool unit 102, a galvanometer scanning unit 103, a measuring unit 104, a coaxial positioning unit 105, a motion control unit 106, and a video display unit 107,
a laser source generating unit 101 for providing laser light with a certain wavelength, for example, laser light with a wavelength of 532nm or 1064 nm.
The probe and tooling unit 102 is used for accommodating an electronic component to be tested and adjusting the focusing position of the probe and the electronic component to be tested.
The galvanometer scanning unit 103 is configured to set a scanning range and a positioning accuracy of the working area, for example, the scanning range may be 102mm by 102 mm.
The measuring unit 104 employs a high-speed resistance voltage measurement control unit which measures and detects an external resistance or voltage, controls the laser source generating unit 101 to switch the laser on and off, and returns the measurement result to the motion control unit 106, and the measuring unit 104 employs a Kelvin (Kelvin) measurement method to realize accurate measurement of the resistance, which may be a two-wire or four-wire measurement of the resistance, an application of current, or a measurement of voltage, and the like.
And the coaxial positioning unit 105 is used for positioning the focus of the laser beam to a processing position, so that parameters such as resistance, voltage, current, circuit signals and the like can be accurately adjusted.
The motion control unit 106 has a built-in measurement system for controlling the basic functions, and can be connected to external measurement instruments such as a digital multimeter, a programmable power supply, an electronic load, a pressure controller, an oscilloscope, etc. through an RS232 Interface or a GPIB (General-Purpose Interface Bus, GPIB) Interface.
And the video display unit 107 is used for setting parameters of a visual field range and visual positioning accuracy, for example, the visual field range can be an area of 8mm by 6mm, and the visual positioning accuracy can be +/-10 um.
The laser resistance adjusting system of the invention positions a beam of focused laser on a resistance substrate to be adjusted under the control of a computer, cuts the resistance substrate, leads a resistance slurry layer to be heated and gasified by the laser, and forms a nick with a certain depth, thereby changing the conductive cross section area and the conductive length of a resistor body, further adjusting the resistor body with the resistance value lower than the target resistance value to the resistor within the allowable deviation range of the resistance value, monitoring the resistance value of the adjusted resistor in real time in the adjusting process, when the measured value reaches the target value, the measuring system turns off the laser, and the measured object can be the adjustment of parameters such as the resistor, the voltage, the current, the electric signal and the like.
The embodiments of the present invention have been described with resistors, and it can be understood by those skilled in the art that the laser resistance trimming system of the present invention can also perform precise trimming on parameters such as voltage, current, time, frequency, pressure, etc. after being externally connected to an external measuring instrument, for example, the system can be externally connected to external devices such as a digital multimeter, a programmable power supply, an electronic load, a pressure controller, an oscilloscope, etc. to achieve trimming of different parameters.
Claims (7)
1. A laser trimming system, comprising:
the laser source generating unit is used for providing laser required by trimming the electronic element;
the probe and tool unit is used for accommodating an electronic element to be tested and adjusting the focusing position of the probe and the electronic element to be tested;
the galvanometer scanning unit is used for setting the scanning range and the positioning precision of a working area;
the measuring unit is used for measuring and detecting external resistance or voltage, controlling the laser source generating unit to switch on and off the laser, and returning the measuring result to the motion control unit;
a coaxial positioning unit for positioning a focal point of the laser beam emitted by the laser source generating unit to a processing position;
the motion control unit is used for controlling the target to be measured according to the measurement result of the measurement unit;
and the video display unit is used for setting parameters of the visual field range and the visual positioning precision.
2. The laser resistance trimming system of claim 1, wherein the laser wavelength is 532nm or 1064 nm.
3. The laser trimming system according to claim 1, wherein the scanning range is 102mm x 102 mm.
4. The laser trimming system according to claim 1, wherein the field of view is 8mm by 6 mm.
5. The laser trimming system according to claim 1, wherein the visual positioning accuracy is ± 10 um.
6. The laser trimming system according to claim 1, wherein the measuring unit measures the resistance in a two-wire or four-wire manner.
7. The laser trimming system according to claim 1, wherein the trimming may be any one of adjusting voltage, current, time, frequency and pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021521136.4U CN213366297U (en) | 2020-07-29 | 2020-07-29 | Laser resistance adjusting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021521136.4U CN213366297U (en) | 2020-07-29 | 2020-07-29 | Laser resistance adjusting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213366297U true CN213366297U (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021521136.4U Active CN213366297U (en) | 2020-07-29 | 2020-07-29 | Laser resistance adjusting system |
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| CN (1) | CN213366297U (en) |
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2020
- 2020-07-29 CN CN202021521136.4U patent/CN213366297U/en active Active
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