6-layer ENIG Blue Mobile Phone Module
This advanced 6-layer mobile phone module features ENIG surface finish and blue solder mask, specifically designed for mobile communication applications with high-frequency performance requirements.
Key Specifications
| Specification |
Value |
| Layer Count |
6 Layers |
| Material |
FR4 |
| Board Thickness |
1.2mm |
| Copper Thickness |
1/1/1/1 oz |
| Minimum Hole Size |
0.2mm |
| Minimum Line Width |
0.1mm |
| Minimum Line Spacing |
0.1mm |
| Solder Mask Color |
Blue |
| Surface Finish |
ENIG |
| Application Field |
Mobile Communication |
Critical Production Processes
- Inner layer core board undergoes browning treatment for uniform film density
- CCD automatic alignment exposure with ±25μm interlayer accuracy
- 100% AOI inspection and line width measurement after inner layer etching
- Hot oil press lamination with ±2°C temperature uniformity and vacuum assist
- X-Ray measurement with ≤75μm interlayer misalignment control
- Scanning acoustic microscopy for delamination and void detection
- High-precision CNC drilling with backup board structures
- Desmearing and potassium permanganate treatment before electroless copper
- Vacuum screen printer for solder mask application
- Plasma roughening before ENIG for enhanced adhesion
- Comprehensive testing including tape pull, bend testing, and TDR impedance
Technical Specifications
| Item |
Mass Production Capability |
Extreme Capability |
| Board Thickness Range |
0.3~6.0mm |
0.3~6.0mm |
| Exposure Alignment Accuracy |
±0.015mm |
±0.005mm |
| Minimum Annular Ring |
Single side ≥0.05mm |
Single side ≥0.05mm |
| Min Line Width/Space (1/3oz base copper) |
0.05mm / 0.05mm |
0.045mm / 0.045mm |
| Min Line Width/Space (1/2oz base copper) |
0.05mm / 0.05mm |
0.05mm / 0.05mm |
| Min Line Width/Space (1oz base copper) |
0.075mm / 0.075mm |
0.075mm / 0.075mm |
| Etching Tolerance (1/3oz base copper) |
±0.005mm |
±0.005mm |
| Etching Tolerance (1/2oz base copper) |
±0.005mm |
±0.005mm |
| Etching Tolerance (1oz base copper) |
±0.0075mm |
±0.0075mm |
| Gold Finger Total Pitch Tolerance |
<30mm: ±0.05mm
30~60mm: ±0.075mm |
<30mm: ±0.03mm
30~60mm: ±0.05mm |