What is Immersion Gold PCB?

Do you know the definition of the Immersion Gold PCB Surface Finish?
Today Jim will introduce several parts of it.

-What is Immersion Gold PCB?
-The Strengths of Immersion Gold PCB
-The Advantage of the Immersion Gold PCB Surface Finish
-Compare with Flash Gold Immersion PCB Surface Finish

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What is Immersion Gold PCB?

Immersion Gold,also called ENIG, has been growing as one of the best finishing methods for printed circuit boards.
ENIG is a costlier finish, but offers the best characteristics for pcbs.

The Strengths of Immersion Gold PCB

Immersion gold chemistries offer many strengths like excellent surface planarity (particularly helpful for PCB’s with large BGA packages) coplanarity, excellent wettability, long shelf-life and surface oxidation.

The Advantage of the Immersion Gold PCB Surface Finish

ENIG doesn’t require frequent dummy plating, excellent re-flow cycles, and gives level plating around the shoulders of pads and circuits. Immersion gold finish also provides both good adhesion as well as providing outstanding electrical testability

Compare with Flash Gold Immersion PCB Surface Finish

Compared with flash gold Immersion gold finish is cheaper because the thickness of gold. However, with good solderability.

4 Layer Printed Circuit Board
FR4 2.00mm board thickness
2OZ copper thickness
Immersion Gold surface finish
Min hole size: 0.25mm
Min track/space: 4mil
BGA

2 Layer PCB
FR4 1.60MM Thickness
2OZ base copper
Immersion Gold Surface Treatment
Min line/width: 5mil
Min Hole: 0.22mm BGA

If you want to place HTD Immersion Gold PCB,please mail to jim@htdcircuit.com