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Method and system for estimating circuit board corrosion risk

A circuit board and risk technology, applied in the direction of printed circuit, printed circuit, circuit device, etc., can solve the problem of high complexity of circuit board pollution test, and achieve easy field application, maintain reliable operation, good testability and accuracy sexual effect

Inactive Publication Date: 2007-09-19
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to propose a method and system for assessing the risk of corrosion on circuit boards to solve the problem of high complexity in testing the degree of contamination on circuit boards

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  • Method and system for estimating circuit board corrosion risk
  • Method and system for estimating circuit board corrosion risk
  • Method and system for estimating circuit board corrosion risk

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The surface insulator resistance of the circuit board is closely related to the pollution degree of the circuit board. Under the same humidity, the higher the pollution, the lower the surface insulation resistance; under the same pollution degree, the higher the humidity, the lower the surface insulation resistance. Therefore, the size of the surface insulation resistance value indirectly reflects the comprehensive influence of corrosive factors such as pollutants and moisture on the circuit board.

[0032] Among them, SIR (Surface Insulation Resistance: Surface Insulation Resistance) refers to the resistance value between two adjacent metal areas on the material surface. The test principle of surface insulation resistance is based on Ohm's law: Rs=U / Is, that is, a voltage U is applied between adjacent conductors, and the current value...

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Abstract

The present invention relates to the testing technology field of electronic equipments, especially to a method and system used for assessing circuit boards corrosion risks. According to the method, the surface insulation resistance values of circuit boards are measured and are compared with the corrosion risks discrimination mapping of the circuit boards to get the corrosion risk levels of circuit boards. The present invention also provides a system used for quickly on-site assessing the circuit boards corrosion risks, which comprises a circuit board, a testing module and a discrimination module, wherein the testing module is used for measuring the surface insulation resistance value of the circuit board and sending the measured value to the discrimination module, the discrimination module is used for comparing the surface insulation resistance value measured with the corrosion risks discrimination mapping to get the corrosion risk level of the circuit board. By using surface insulation resistance values easily got on-site to indicate the circuit boards corrosion risks, the present invention is capable of quickly on-site assessing the corrosion risk of a circuit of a board, and then exhibits excellent effect about adopting some protection measures of the circuit board in time.

Description

technical field [0001] The invention relates to the technical field of testing electronic equipment, in particular to a method and system for evaluating the corrosion risk of a circuit board. Background technique [0002] The surface of the circuit board and its components will be polluted during the manufacturing process, and the surface will also be polluted due to the deposition of dust in the use environment. Under the action of these comprehensive factors such as ion pollution and moisture, the wiring on the surface of the circuit board, the device body, and the solder joints may all be corroded, eventually causing the single board of the circuit board to be corroded and fail. How to predict the corrosion risk of circuit boards in combination with actual environmental factors has always been a difficult problem in the industry. [0003] The degree of ionic contamination can be used to quantify the degree of contamination of the test panel surface by inorganic ions. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N17/00
CPCH05K2201/0761H05K2203/162H05K1/0268H05K1/0256
Inventor 徐焰陈普养
Owner HUAWEI TECH CO LTD
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