COG classify causes of corrosion oled module

1, COM electrode corrosion: is electrochemical corrosion and stress corrosion, electrochemical etching is due to the different metals have different electrochemical potentials, or the same material but the potential presence of a potential difference, and deposit each COM potential difference between the electrodes. Because the COM electrode in the LCD manufacturing process required for cutting operations, the cutting process marks if they cause damage to the COM electrode crack, stress, corrosive environment in the event of the COM electrode corrosion occurs. Low Temperature Display
2, ACF corrosion under: Electrochemical corrosion and crevice corrosion, in addition to electrochemical corrosion, crevice corrosion occurred at the gap and there is stagnation at the surface of the solution of the shelter local electrochemical corrosion. To generate a crevice corrosion, must have a gap wide enough to allow the liquid to enter it, but it also allows stagnant liquid flow, ACF position in contact with the ITO to form a gap, there are ions contaminated liquid, corrosive power.
3, crevice corrosion: Caught not clean the glass, leaving the water, crevice corrosion, electrochemical corrosion.
4, ITO electrode surface corrosion: pitting, ITO surface caused by the presence of contaminants present during power electrochemical corrosion.
Based on the above analysis, according to the theory corrosion, COG corrosion by corrosive only different aspects of the classification made, but the basic belong to electrochemical corrosion, which occurs when the corrosion basic conditions: Solution, power, contamination, stress. For the COG process control, if no dirt on the clean ITO, or some kind of solution exists in the electrodes, or the LCD manufacturing process causing damage COG electrodes will cause the LCD to power after a period of COG display or electrode corrosion. custom lcd module