A method for preparing low-dielectric polyimide film by electrodepositing polyimide
A technology of polyimide film and polyimide, applied in the direction of coating, etc., can solve the problems of disordered arrangement of internal pores, difficulty in controlling porosity, low film strength, etc., and achieve easy control of pore size and good mechanical properties Performance, the effect of reducing the heat treatment temperature of imidization
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Embodiment 1
[0049] The invention provides a method for preparing low-dielectric polyimide film by electrodepositing polyimide, comprising the following steps:
[0050] 1. Preparation of template
[0051] Disperse SiO2 microspheres with a particle diameter of 200nm in a dispersant to prepare a uniform dispersion of microspheres. Put the clean ITO into the culture bottle, inject an appropriate amount of dispersion liquid into the bottle, put the culture bottle into the incubator, and wait for the solvent to evaporate to prepare the template for electrodeposition. The temperature range of the incubator is 30°C.
[0052] 2. Preparation of Polyimide Electrodeposition Solution
[0053] (2.1) Add dianhydride and diamine monomer into a flask filled with an appropriate amount of dimethylformamide at a ratio of 1:1, then add a certain amount of triethylamine and benzene, and feed an inert gas into the reaction device. Heating and stirring at ℃ for 90min. Then heat up to 150°C and stir for 5h to...
Embodiment 2
[0062] 1. Preparation of template
[0063] Disperse PS microspheres with a particle size of 1500nm in a dispersant to prepare a uniform dispersion of microspheres. Put a clean copper plate into a culture bottle, inject an appropriate amount of dispersion liquid into the bottle, put the culture bottle into an incubator, and wait for the solvent to evaporate to prepare a template for electrodeposition. The optional temperature range in the incubator is 60°C.
[0064] 2. Preparation of Polyimide Electrodeposition Solution
[0065] (2.1) Add dianhydride and diamine monomer into a flask filled with an appropriate amount of dimethyl sulfoxide at a ratio of 1.1:1, then add a certain amount of dimethyldodecylamine and ether, and pass inert gas into the reaction device , heated and stirred at 50°C for 15min. Then heat up to 200°C and stir for 1 h to react. After the reaction, the azeotrope of water and ether is removed to obtain a polyimide solution, and the mass fraction of the po...
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