cause:

1. Production: Due to the coating process, some needle-like film falling, also called pinhole, may occur in the production process, which is unavoidable by the sputtering coating process itself. In addition, it may cause film loss due to the original film itself or equipment cleaning.

2, transport off the film: after the glass is unpacked or after cutting, there is no padding or padding between the glass piece and the piece as required, resulting in direct contact between the glass, during handling or transportation The direct friction between the glass and the glass film surface causes the film to fall off. Such a film is generally a punctiform or agglomerated film which can be felt or checked by hand or inspection equipment.

3, corrosive film: because the glass film surface in the cutting stack, construction or cleaning, due to cross-construction or the use of an incorrect method, the glass film surface is exposed to acid or alkali or oxidizing substances, resulting in glass film surface It is contaminated by corrosion and falls off the membrane. This film can generally find traces of corrosive substances on the film surface or in the field.