Method for manufacturing 'three-proofing' protection system of printed circuit board through nanometer paint
A technology for printed circuit boards and nano-coatings, which is applied to devices for coating liquids on surfaces, coatings, and pretreatment surfaces. Wide and low equipment requirements
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Embodiment 1
[0017] The heat-curing nano-waterproof liquid 9816 (Dongguan Zhancheng Chemical Technology Co., Ltd.) was selected as the PCB protection system. First, soak the PCB in a non-chlorofluorocarbon cleaning agent (KYX-312, Jiangsu Kangyixin Electronic Technology Co., Ltd.) for 5 minutes, and scrub it with a soft wool brush; then, put the cleaned and dried PCB into the plasma excitation frequency Activation for 3 minutes in a plasma cleaning machine with a frequency of 13.56MHz and oxygen as the cleaning gas; then, bake the activated PCB in a vacuum oven at 50°C for 10 minutes, and immediately soak it in nano-waterproof liquid 9816 for 30 seconds after baking ; Finally, place the PCB impregnated with paint upright and cure at room temperature for 24 hours. The hydrophobic angle is greater than 110°, and the waterproof level can reach IP6.
Embodiment 2
[0019] The heat-curing nano-waterproof liquid L4 (Shenzhen Paiqi Nano Technology Co., Ltd.) was selected as the PCB protection system. First, soak the PCB in a non-chlorofluorocarbon cleaning agent (KYX-312, Jiangsu Kangyixin Electronic Technology Co., Ltd.) for 5 minutes, and ultrasonically clean it with a 180W ultrasonic cleaner; then, put the cleaned and dried PCB into the plasma excitation Activate for 3 minutes in a plasma cleaning machine with a frequency of 13.56 MHz and oxygen as the cleaning gas; then, bake the activated PCB in a vacuum oven at 55°C for 8 minutes, and soak it in nano-waterproof liquid L4 immediately after baking 1min; Finally, place the impregnated coated PCB upright, cure at 60°C for 1h, and place at room temperature for 12h. The hydrophobic angle is greater than 110°, and the waterproof level can reach IP6.
Embodiment 3
[0021] The heat-curing nano-waterproof liquid CSS (Ningbo Funa New Material Technology Co., Ltd.) is selected as the PCB protection system. First, put the PCB under the spray equipment with non-chlorofluorocarbon cleaning agent (KYX-312, Jiangsu Kangyixin Electronic Technology Co., Ltd.) as the solvent and spray for 5 minutes; then, put the cleaned and dried PCB into the plasma excitation Activate for 3 minutes in a plasma cleaning machine with a frequency of 13.56MHz and oxygen as the cleaning gas; then, bake the activated PCB in a vacuum oven at 60°C for 5 minutes, and soak it in nano-waterproof CSS immediately after baking 1min; Finally, place the impregnated coated PCB upright, cure at 65°C for 0.5h, and place at room temperature for 12h. The hydrophobic angle is greater than 110°, and the waterproof level can reach IP6.
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