Traditional Culture Encyclopedia - Photography major - What happens when the positive film is not developed cleanly?
What happens when the positive film is not developed cleanly?
Remnant glue and excessively thin lines are produced.
Proper control of exposure time is an important condition for controlling the development effect.
The influence of temperature and humidity on film application: Different dry films have more suitable film application temperatures. If the laminating temperature is too low, the resist film will not be fully softened and flow properly, resulting in poor bonding force between the dry film and the copper-clad laminate surface; if the temperature is too high, the solvent and other volatile components in the resist will The rapid volatilization of substances produces bubbles, and the dry film becomes brittle and cannot withstand electroplating, causing warping and peeling, resulting in plating and scrapping. Currently used Wuxi DFP type and American DuPont 3000 type dry film generally control the film temperature to be 70-900 degrees.
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