PCB Etching
Currently used for print circuit board etching of solvents are iron (Ferric Chloride), cupric chloride (Cupric Chloride), alkaline ammonia (Alkaline Ammonia), sulfuric acid hydrogen peroxide (Sulfuric Acid + Hydrogen Peroxide) etching fluid, ammonium persulfate, sulfuric acid – chromic acid etching solution. Like the PCB manufacturing in Fusion PCB of Seeed. Etching liquid are mainly copper chloride solution, ferric chloride liquid, alkaline etching, acid/hydrogen peroxide (hydrogen peroxide)
Chloride copper etched liquid by chloride copper (CuCl2 Castle, 2H2O) + hydrochloride (HCl) + hydrogen peroxide (H2O2) + water (H2O) composition; three ferric chloride etched liquid is by three ferric chloride (FeCl3) + hydrochloride (HCl) + water (H2O) composition of; alkaline etched liquid of main components has copper ammonia complex ion; sulfuric acid/hydrogen peroxide (hydrogen peroxide) etched liquid to sulfuric acid and hydrogen peroxide (hydrogen peroxide) mainly components.
PCB etching process and copper chloride and ferric chloride market, PCB manufacturers some 95% using copper chloride (CuCl2), IC substrate maker about 80% using ferric chloride (FeCl3), 20% using copper chloride (CuCl2).
You can try etching PCB at home.
Material required.
- PCB board
- Laser Printer
- Drill machine
- Ferric Chloride (Etching solution)
- Cloth Iron
- Photo paper / Glossy paper
- Sand paper or Steel wool
- Black permanent Marker
- Soldering Iron