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Printed circuit board Manufacturer, Photoplotting Established 1964  All types of Pcb, surface mount sm, PTH, SS single     single sided, PTH, IMS, ML multi layer printed circuit board  prototypes. Cheap high quality PCBs Printed circuit boards. 

Printed circuit boards tooled up from Gerber,JPG,DXF,and most common file types, or camera ready artworks either 2:1 or 1:1 std scale.

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Sulphuric-Peroxide Etches:-

Cheap, easily recoverable etch used for etching PTH circuit boards, also used as a micro etch (chemical sandpaper) before plating processes. A straight mixture of Sulphuric and Peroxide makes a very fast etchent, but sadly is unstable and not safe to use. Additives are added such as Aryl Sulfonic acids to stabilize the peroxide in solution, and even Phosphoric acid which helps to retain a cleaner tin lead over the copper. Std Reaction is :-

Cu + H2O2 + H2SO4 >> Cu2SO4 + 2H2O

Copper can be recovered as copper sulphate by cooling and crystallization, or as metallic copper by electroplating. This is often done by plating onto stainless steel plates using lead or graphite anodes. After which the copper can be easily peeled off the stainless steel plates. 




The PCB Process



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