Step 1 CAM Processing
According to the customer’s information, the GERBER data is reviewed, and the impedance design is carried out if there is an impedance requirement, to ensure that the data meets the production requirements.
step 2: cutting
According to the engineering information provided by the customer, cut out small pieces of production panels on the panels that meet the requirements. Specific process: large sheet→cutting according to MI requirements→curling sheet→beer fillet/edging→out of sheet.
Step 3: Drilling
Drill holes on the plates that meet the requirements, and drill the required hole diameters at the corresponding positions. Specific process: Lamination pins→upper board→drilling→lower board→inspection/repair.
Step 4: Immersion Copper
A thin layer of copper is chemically deposited over the insulating holes. Specific process: coarse grinding→hanging plate→copper sinking automatic line→lowering plate→immersing in 1% dilute H2SO4→thickening copper.
Step 5: Graphic Transfer
Transfer the image on the production film to the board. Specific process: hemp board → lamination → static → alignment → exposure → static → developing → inspection.
Step 6: Graphic Plating
Electroplate a layer of copper with the required thickness and a gold-nickel or tin layer with the required thickness on the exposed copper skin of the circuit pattern or on the wall of the hole. Specific process: upper plate → degreasing → secondary washing → micro-etching → water washing → pickling → copper plating → water washing → pickling → tin plating → water washing → lower plate.
Step 7: Remove the film
Use NaOH solution to remove the anti-plating coating layer to expose the non-circuit copper layer.
Step 8: Etching
Remove the non-line parts with chemical reagent copper.
Step 9: Green Oil
Transfer the graphics of the green film to the board, mainly to protect the circuit and prevent tin on the circuit when soldering parts.
Step 10: Characters
Print some characters on the circuit board for easy identification. Specific process: after finishing the green oil → cooling and standing → adjusting the screen → printing characters → finishing the curium.
Step 11: Gilded Fingers
A nickel/gold layer of the required thickness is plated on the plug fingers to make it more rigid and wear-resistant.
Step 12: Shaping
The shape required by the customer is produced by die stamping or CNC machine.
Step 13: Test
Test with a flying probe tester to detect defects that affect functionality such as open circuits and short circuits that are not easy to be found visually.