The gold thickness needs to meet certain tolerances to ensure that the nickel maintains its solderability .
During the immersion gold step , the gold adheres to the nickel - plated areas through molecular exchange , which will protect the nickel until the soldering process .
The gold thickness needs to meet certain tolerances to ensure that the nickel maintains nickel 's solderability .
During the immersion gold step , the gold adheres to the nickel - plated areas through molecular exchange , which will protect the nickel until the soldering process .