What is the purpose of using Nickel in PCB surface finish ENIG?
First, let's take a look at the characteristics of nickel.
In addition to anti-oxidation, nickel can enhance the following mechanical properties.
What role does nickel play in ENIG?
The main purpose of using nickel in surface finish ENIG is to avoid the migration and diffusion between Cu and Ag, and play role as a barrier layer and protect copper layer from oxidation, furthermore, the nickel can also prevent poor conductivity and poor solderability.
And in order to smooth the PCB assembly process, components are sometimes plated with a layer of nickel as a barrier layer.
In addition to anti-oxidation, nickel can enhance the following mechanical properties.
1. Tensile strength
2. Elongation
3. Hardness
4. Internal
5. Fatigue life
6. Hydrogen embrittlement
What role does nickel play in ENIG?
The main purpose of using nickel in surface finish ENIG is to avoid the migration and diffusion between Cu and Ag, and play role as a barrier layer and protect copper layer from oxidation, furthermore, the nickel can also prevent poor conductivity and poor solderability.
And in order to smooth the PCB assembly process, components are sometimes plated with a layer of nickel as a barrier layer.