A 2 Layer PCB with 5 microinches (μ”) Thickness of Immersion Gold refers to a specific printed circuit board configuration:
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2 Layer: This PCB has two conductive copper layers, typically one on top and one on bottom, separated by an insulating substrate.
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5μ” Immersion Gold: This indicates a relatively thick gold finish applied through the immersion gold process.
Key characteristics:
- Thicker than standard ENIG (typically 2-5μ”), offering enhanced durability
- Excellent corrosion resistance and oxidation protection
- Superior conductivity and solderability
- Extended shelf life compared to thinner gold finishes
- Suitable for applications requiring multiple soldering cycles
The 5μ” gold thickness is particularly beneficial for:
- High-reliability electronics
- Harsh environment applications
- Devices with extended life cycles
- Products requiring frequent rework or repair
While more expensive than thinner gold finishes, this configuration provides a balance between the durability of hard gold plating and the cost-effectiveness of standard ENIG. It’s often used in industrial, automotive, and high-end consumer electronics where reliability is crucial.
