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Water-drop test system for electrochemical migration experiment

A test system and electrochemical technology, applied in measuring devices, scientific instruments, measuring electrical variables, etc., can solve the problems of uncontrollable water droplet weight, inability to ensure the consistency of water droplet weight and position, and inability to eliminate electromagnetic interference, etc., to reduce electromagnetic interference. the effect of interference

Inactive Publication Date: 2015-06-10
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The dripping action is done manually, and the weight of the water drop is uncontrollable, so the consistency of the weight and position of the water drop during multiple tests cannot be guaranteed
[0009] 2. Unable to eliminate electromagnetic interference during the test

Method used

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  • Water-drop test system for electrochemical migration experiment
  • Water-drop test system for electrochemical migration experiment
  • Water-drop test system for electrochemical migration experiment

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Embodiment Construction

[0031] The water drop type electrochemical migration experimental test system proposed by the present invention improves the controllability of the experimental system through the automatic detection and control of the dripping action and the weight of the water drop, and can conduct comparative experiments on various slices, and effectively reduces the test noise. Improved measurement accuracy. The operation process of the water drop test is: place the tested sample on the stage, open the test program window on the computer, at this time the computer receives the weight of the tested sample sent by the pressure sensing device, and displays it in the window, and then set After confirming the water drop weight and various test parameters, click the "Start" button to start the water drop test, and then the dripping operation device will drop water drops between the two wires of the sample, and the stepping motor will immediately drive the stage to move the dripping part of the sa...

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Abstract

The invention discloses a water-drop test system for an electrochemical migration experiment. The water-drop test system comprises a computer unit, a motor drive device, a stepper motor, a water-dropping device, a video capture device, an insulation resistance measuring device and a sample stage. After a sample wafer is loaded well, test parameter information is set in the computer and sent to the water-dropping device, the video capture device and the insulation resistance measuring device; a test order is started; the water-dropping device drops a water drop with specified weight on the sample wafer; the sample wafer is controlled to move toward below the video capture device fast; electrochemical migration phenomenon between wires on the sample wafer is shot and sent back to the computer for storage and real-time display; at the same time; a surface resistance value between wires on the sample wafer is measured by the insulation resistance measuring device and sent back to the computer for storing and displaying a resistance curve. With the water-drop test system, water-dropping operations and water-dropping amount required by the electrochemical migration experiment between the between wires on the surface of the sample wafer can be controlled automatically; measurement error brought by manual operations is prevented effectively; interference and test noise are reduced by adopting triaxial cables and shielded twisted-pair cables; and accuracy of high resistance measurement between the wires on the surface of the sample wafer can be increased.

Description

technical field [0001] The design of the present invention relates to an electrochemical migration testing technology, in particular to a water drop type electrochemical migration experimental testing system. Background technique [0002] With the improvement of functions and performance, electronic equipment is also rapidly developing towards miniaturization and light weight. The lines of the printed circuit board are getting thinner and the spacing is getting smaller and smaller. In addition to problems such as thermal fatigue caused by poor heat dissipation of electrical contacts on printed circuit boards, electrochemical migration between contacts has attracted more and more attention, and has become a major issue in the field of electronic packaging. [0003] Electrochemical migration is an electrochemical phenomenon. It is under certain temperature and humidity conditions, the metal on the printed circuit board is ionized and migrates to the adjacent other metal thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G01R27/02
Inventor 周怡琳霍雨佳杨盼
Owner BEIJING UNIV OF POSTS & TELECOMM
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