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 　　 Hard Gold PCB including Full Body and Selective Hard Gold Plating        https://www.ymspcb.com/hard-gold-plating-pcb/ 　　The Hard Gold surface finish, also known as Hard Electrolytic Gold, is composed of a subcaste of gold with added hardeners for increased continuity, plated over a hedge fleece of nickel using an electrolytic process. Hard gold is extremely durable, so during PCB Fabrication this finish is generally applied to high-wear areas, analogous as edge connector Gold Fingers and keypads, since the hardness of the finish can repel repeated use; still, due to the high cost of hard gold, and its fairly poor solder- capability, it's truly rarely applied to solder-suitable areas. 　　Full Body Hard Gold is generally a rarely- chosen face finish, where the full body of the PCB board is plated with hard gold. In order to apply a Full Body Hard Gold face finish, an electrolytic process using an electric current or an immersion process is demanded, depending...