Humidity-induced common circuit board failures, resulting in circuit boards in the circuit parameters change caused by circuit board failure, circuit boards in the circuit board in a short-circuit state, resulting in circuit board failure, signal processing or transmission line breakage, resulting in circuit board failure.

Humidity caused by common circuit board failure problems

The definition of humidity that contains more water than the normal state, so the use of circuit boards in humid environments, due to the air contains a relatively large amount of moisture, when the moisture is too large it will be turned into water droplets fall to the circuit board, fall to the circuit board on the water droplets on the circuit board after the board to spread out, it will be dependent on the electronic components of the pins or printed lines.

Due to the current application of electronic components in the circuit board are SOP or SSOP chip components, pins and pins between the distance is very small, especially the SSOP package of integrated circuits and its pins and pins between the distance is very small, when the moisture is converted into water droplets in the SSOP package integrated circuit pins, if the board is in operation at this time, it will be for the integrated circuit between the pins to increase an Invisible resistance (because the water is conductive), or even trigger a short circuit, resulting in a failure of the circuit board in the working state.

If the moisture converted into water droplets on the circuit board between the pins of the electronic components, and at this time the circuit board just did not work or power outage, will not immediately cause harm to the circuit board, but the pins of the electronic components or printed line by the water droplets after the infiltration of the pins of the components will be rusted, and for a long time will be due to the corrosion of the broken foot triggered by the failure of the circuit board, the printed line was infiltrated by the water droplets, especially after the signal After the printed line is infiltrated by water droplets, especially the signal transmission line is relatively small, after being infiltrated for a period of time, there will be moldy breaks in the printed line, resulting in the circuit board in the next put into operation, there can not run the situation.

For the reasons that humidity causes circuit board failure, the outline of three:

1. Resulting in circuit parameters in the circuit board to change the circuit board failure;
2. Triggered by the circuit board in the short circuit state, resulting in circuit board failure;
3. Resulting in circuit board signal processing or transmission lines appear broken, resulting in circuit board failure. Friends can be based on these three major measures to reduce or avoid your jurisdiction over the equipment in the circuit board due to moisture caused by circuit board failure.