PCBSky

Electroplating can be divided into hard gold and soft gold. Hard gold electroplating is an alloy, so its hardness is relatively hard. It is suitable for use in places requiring force and friction. It is generally used as the edge contact point of PCB (commonly known as golden finger). Soft gold, On the other hand, is commonly used to connect aluminum wires On the COB (Chip On Board) or On the touch surface of mobile phone keys, and more recently, it is widely used On both sides of BGA boards. The distinction of hard gold and soft gold, it is the component of this layer of gold that goes up finally plating, when gold-plating can choose electroplate pure gold or alloy, because the hardness of pure gold is softer, so also call "soft gold". Function of auxiliary components in   hard gold plating PCB   plating solution: Boric acid ACTS: as a buffer, which can maintain a relatively balanced PH value of hard gold-plated PCB plating solution with a concentration of 35~55g/l; Nicke

The purpose of   hard gold plating PCB   adhesive tape: is to expose only the part of the board to be plated with hard gold, and to cover the rest with adhesive tape to prevent plating. Tape sticking is a delicate work. It is not allowed to stick the golden finger with tape and it is too far away from the golden finger. It is necessary to prevent cutting the board when removing the excess tape and avoid wiping the flower artificially.  Pay attention to the use of tape not degumming phenomenon, in order to avoid the copper surface residual glue stains. This step is the most labor-intensive, automatic tape machine on the market, will bring about another industrial revolution.  The purpose of hard gold plating PCB roll adhesive tape is to stick the adhesive tape to the board surface through the roller machine, so as to avoid cross contamination between the cylinder of medicine caused by the Tibetan medicine water in the belt during the nickel-gold plating because the adhesive tape is