Its film is tight and firm, good bonding force with the substrate
Good extinction effect, no color bias
Low stress of thin film
Excellent thickness uniformity and operation stability
Good adhesion on polymer substrate directly
Film properties Environmental stability Good The type of stress Up to the deposition rate parameter
Black film BB have strong hiding power, high K value, material can be evenly melted, good process performance.The type and magnitude of stress on materials vary with the process parameters.Traditional deposition methods can obtain films with compressive stress close to zero.BB films adhere well to a variety of substrate types (especially certain types of plastics) and exhibit good environmental stability. Being used for all kinds of extinction film or with other materials to prepare black film with special reflection effect.
Evaporation technique Material can be coating by Mo/W boats or electron guns without oxygen injection during evaporation. The typical deposition rate is 0.5-1.0 nm/s.The desired blackness/reflection effect can be obtained by changingthe film thickness, substrate temperature, oxygen pressure or flow rate, deposition rate, and ion-assisted parameters. Reproducible and uniform films can be obtained under suitable process conditions.