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PAA film formation difficulty in PI processing
Fenómeno do problema
PAA solution cannot be cast into a uniform film
Análise das causas
Solution viscosity does not match the coating process; improper substrate surface treatment; ambient humidity influence
Solução
Adjust the solution concentration to a suitable viscosity (according to the coating method); surface-treat the substrate; control the coating environment humidity <30%RH
Conclusão principal
PI film making requires precise coating process control
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