PCB PCB manufacturer proofing process_Shenzhen StarLight Industrial Development Co., Ltd.

PCB PCB manufacturer proofing process

source:Other information release time:2022-11-11 Hits: Popular:PCB Assembly company: Share:

　　 PCB Assembly

　　Step 1: Check data

　　Before production, the circuit board manufacturer will check the board making data provided by the customer, including the size of the board, process requirements, product quantity and other relevant data. The next step of production can only be carried out after reaching an agreement with the customer.

　　Step 2: Material opening

　　According to the plate making data provided by the customer, cut small pieces of production plates on the plates that meet the requirements. Specific operation: large plate → plate cutting according to MI requirements → curium plate → fillet/edge grinding → plate discharging.

　　Step 3: Drilling

　　Drill the required hole diameter at the corresponding position of the PCB. Large plate → cut plate according to MI requirements → curium plate → fillet/edge grinding → plate out.

　　Step 4: Copper sinking

　　A thin layer of copper is chemically deposited on the insulating hole. Specific operation: rough grinding → hanging plate → copper automatic line → lower plate → dipping 1% dilute H2SO4 → thickening copper.

　　Step 5: Graphic transfer

　　Transfer the image on the production film to the board. Specific operation: hemp board → film pressing → standing → alignment → exposure → standing → shadow developing → inspection.

　　Step 6: Pattern electroplating

　　Electroplate a copper layer with the required thickness and a gold nickel or tin layer with the required thickness on the exposed copper sheet or hole wall of the circuit diagram. Specific operation: upper plate → degreasing → secondary water washing → micro etching → water washing → pickling → copper plating → water washing → pickling → tin plating → water washing → lower plate.

　　Step 7: Film stripping

　　Remove the anti electroplating coating with NaOH solution to expose the non line copper layer.

　　Step 8: Etching

　　Remove the non line parts with chemical reagent copper.

　　Step 9: Green oil

　　The graphic of the green film is transferred to the board, mainly to protect the circuit and prevent the tin on the circuit when welding parts.

　　Step 10: Characters

　　Print recognizable characters on PCB. Specific operation: after green oil final curium → cooling and standing → screen adjustment → character printing → back curium.

　　Step 11: Gilded fingers

　　A nickel/gold layer of required thickness shall be plated on the plug finger to make it more hard and wear-resistant.

　　Step 12: Forming

　　The shape required by the customer is stamped with a die or produced by a numerical control gongs machine.

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