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Nondestructive testing device and testing method for multilayer ceramic capacitors

A technology of non-destructive testing and capacitors, which is applied in the direction of measuring devices, testing dielectric strength, instruments, etc., can solve the problems of non-destructive testing, low detection efficiency, and error of test results, etc., to improve partial discharge detection efficiency, large insulation and Corrosion resistance and large deformation range

Active Publication Date: 2018-05-08
BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, it is found that the detection efficiency of the existing technology is low, which is more suitable for the detection of a single component, but not suitable for mass inspection, and it is difficult to meet the requirements of improving product reliability.
Moreover, this method is not suitable for direct detection of leadless samples, because the samples need to be welded with lead wires before detection, and MLCC is prone to thermal shock during the welding process and destroys the integrity of the ceramic medium, resulting in errors in the test results. At the same time, it cannot meet the requirements of non-destructive testing

Method used

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  • Nondestructive testing device and testing method for multilayer ceramic capacitors
  • Nondestructive testing device and testing method for multilayer ceramic capacitors
  • Nondestructive testing device and testing method for multilayer ceramic capacitors

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Embodiment 1

[0030] Embodiment 1: as Figure 1-2 As shown, the present invention provides a non-destructive testing device for multilayer ceramic capacitors, including a partial discharge detector 1, a test power supply 2 and a test device 3, and the test power supply 2 is connected to the partial discharge detector 1 and the test device 3 respectively;

[0031] The test power supply 2 is provided with an adjustment knob for adjusting the test voltage;

[0032] The partial discharge detector 1 is composed of a high-voltage power supply, an amplifier, an elliptical scanning generator, a detection impedance and an oscilloscope. The partial discharge detector 1 is provided with a high-voltage terminal and a grounding terminal;

[0033] The test device 3 includes an insulating liquid container 5 filled with insulating liquid, a row selection switch 6 and a column selection switch 7; the insulating liquid container 5 is provided with an electrode support plate 10, and a plurality of clamping el...

Embodiment 2

[0036] Embodiment 2: as image 3 As shown, the present invention also provides a non-destructive testing method for multilayer ceramic capacitors, including:

[0037] S101. Connect the test power supply, the partial discharge detector and the test device, and respectively install a plurality of components to be tested on the detection electrodes of the test device;

[0038] S102. Apply the test voltage provided by the test power supply to the test device, and perform non-destructive testing on multiple components under test at the same time;

[0039] S103. Adjust the test voltage, and use the partial discharge detector to detect whether there is a partial discharge phenomenon. If there is a partial discharge phenomenon, proceed to S104. If there is no partial discharge phenomenon, it proves that all the components to be tested are normal, and then replace the next set of components to be tested. detection.

[0040]S104. Perform a positioning test on all the components to be ...

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Abstract

The invention discloses a nondestructive test apparatus for a multilayer ceramic capacitor and a detection method thereof. A testing power source is connected with a partial discharge detector and a testing device. The testing device includes an insulating liquid container with insulating liquid, a row selection switch, and a column selection switch; an electrode support plate is arranged in the insulating liquid container; a plurality of detection electrodes for clamping to-be-detected elements are fixed on the electrode support plate; and one end of each detection electrode is connected with the row selection switch and the other end is connected with the column selection switch. The row selection switch is connected with a high-voltage terminal of the partial discharge detector; and the column selection switch is connected with a ground terminal of the partial discharge detector. According to the invention, with the testing device, a plurality of to-be-detected elements can be detected simultaneously; and if any unqualified element occurs, the row selection switch and the column selection switch are used for localizing and rejecting the element with any defect. Therefore, the partial discharging detection efficiency of the sheet type multilayer ceramic capacitor is improved.

Description

technical field [0001] The invention relates to the technical field of electronic information materials and components, in particular to a multilayer ceramic capacitor non-destructive testing device and testing method. Background technique [0002] Multilayer Ceramic Capacitor (Multlilayer Ceramic Capacitor, referred to as MLCC) is composed of internal electrodes made of metal and ceramic dielectric layers alternately covered. The exposed part of the component is encapsulated by ceramic dielectric materials. Internal electrode connection. Since it is difficult to achieve very pure and dense ceramic media during the manufacturing process, the interior of ceramic media tends to contain small pores, delamination and other defects. Since the dielectric constant of pores (air or vacuum inside) is smaller than that of solid ceramic media, the electric field strength in them is relatively large, so the discharge inside defects such as pores is the main cause of partial discharge i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 王家昌戴颖孔泽
Owner BEIJING YUANLIU HONGYUAN ELECTRONICS TECH