The Difference Between Immersion Gold(ENIG) and Gold Plating in PCBs
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Sep 09.2022, 15:23:58
connecting finger( gold finger ) boards need gold plating or immersion goldI. Immersion Gold VS Gold PlatingImmersion gold adopts the method of chemical deposition. A layer of coating is formed by a chemical redox reaction. Generally, the thickness is thicker. Gold plating uses the principle of electrolysis, also known as electroplating. Most other metal surface treatments are also electroplated. In actual product applications, 90% of gold plates are immersion gold boards, because the poor weldability of gold-plated boards is a fatal shortcoming, and it is also the direct reason why many companies give up the gold-plating process! The immersion gold process deposits a nickel-gold coating with stable color, good brightness, smooth coating, and good solderability on the surface of the printed circuit. Basically, it can be divided into four stages: pre-treatment (oil removal, micro-etching, activation, post-dipping), nick...