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Professional PCB Manufacturer
Professional PCB Manufacturer
Enig refers to Electroless Nickel Immersion Gold, is a type of surface plating used for printed circuit boards. ENIG PCBs (also named ENIG PC boards or ENIG circuit board Construction) consists of an underlying layer of nickel with a thin layer of gold over the top. Enig Finish PCB provides various advantages such as high strenght, low contact resistance and etc, so it's widely used in many applications.
| Advantages | Disadvantages | |
| Enig PCBs | • Easy process mechanism • Flat surfaceh • Long Shelf Life • Good oxidation resistance • High temperature resistance • Good electric performance • Good for PTH (Plated Through Holes) • No Pb • Good thermal diffusion | • Expensive • Black Pad / Black Nickel • Signal Loss (RF) • Not Re-workable • Damage from ET • Complicated Process |
To achieve an ENIG finish on your PCB, there are several steps that you should follow.
Step 1: the surfaces and vias intended for the finish first have a nickel layer applied to the copper in an electroless process as a diffusion barrier.
Step 2: a thin gold finish is applied. The gold adheres to the nickel-plated areas through a molecular exchange, which will protect the nickel until the soldering process.
| Surface Finish | Content | Technological Capability |
| Hot Air Solder Leveling(Include:Lead-Free) | Min. panel size | 155*255mm |
| Max. panel size | 600*622mm | |
| Board thickness | 0.60 - 3.20mm | |
| Solder thickness | Standard: 1- 40um | |
| Advance: 5 - 40um | ||
| Minimum spacing form SMT pad | 0.2mm (with s/m brigde) | |
| 0.25mm (without s/m bridge) | ||
| Ground to ground or ground to track Spacing | 0.20mm | |
| OSP | Min. panel size | 75*75mm |
| Max. panel size | 610*610mm | |
| Board thickness | 0.40 - 3.20mm | |
| Coating thickness | 0.20 - 0.50um | |
| Immersion gold (According to IPC-4552-WAM1-2) | Board thickness | 0.20 - 3.2mm |
| Nickel thickness | 3.0-6.0μm | |
| Gold thickness | Min. 0.025um | |
| Immersion Ag (According to IPC-4553A) | Max panel size | 406*533mm |
| Board thickness | 0.20 - 3.2mm | |
| Immersion Ag thickness | 0.05 - 0.3um | |
| Immersion Tin (According to IPC-4554) | Max panel size | 406*533mm |
| Board thickness | 0.20 - 3.2mm | |
| Immersion Tin thickness | 0.75 - 1.2um |
VictoryPCB is one of the most professional pcb fabrication manufacturers in China. We specialized not only in quick-turn pcb prototype, but also large volume PCB fabrication. We give 100% quality guarantee on printed circuit boards with Enig surface finish.
Get an instant quote for high quality PCBs with any surface finish such as enig finish, enepig surface, HASL, OSP and etc, pls please feel free to contact us with sales@victorypcb.com, we will be happy to help you.