HDI
FS & FST Series High-Density Interconnection (HDI) 4-Up Multilayer PCB Panel
1. Product Overview
The FS & FST Series PCB is a high-density, multi-layer printed circuit board supplied in a 4-up panel format. It is engineered for high-performance electronic applications requiring reliable signal integrity, compact layout, and robust thermal management. The panel design supports efficient mass production and assembly, making it ideal for industrial, automotive, and consumer electronics systems.
2. General Specifications
| Parameter | Value |
|---|---|
| PCB Type | Multilayer HDI PCB Panel |
| Panel Format | 4-Up (4 identical circuits per panel) |
| Base Material | FR-4 (High TG 170°C) |
| Number of Layers | 4–8 Layers (customizable) |
| Copper Thickness | 1 oz (35 μm) Outer Layers; 0.5 oz (17.5 μm) Inner Layers |
| Solder Mask | Green (Lead-Free, RoHS Compliant) |
| Silkscreen | White Legend Ink |
| Surface Finish | ENIG (Electroless Nickel Immersion Gold) / HASL Lead-Free |
3. Electrical Characteristics
| Parameter | Specification |
|---|---|
| Impedance Control | 50Ω / 75Ω (±10% tolerance, customizable) |
| Minimum Line Width | 3 mil (75 μm) |
| Minimum Line Spacing | 3 mil (75 μm) |
| Minimum Via Size | 6 mil (150 μm) (Drill Diameter) |
| Maximum Current Rating | 3 A/oz per trace (typical) |
| Insulation Resistance | ≥10^10 Ω at 500 VDC |
| Dielectric Strength | ≥15 kV/mm |
4. Mechanical Specifications
| Parameter | Value |
|---|---|
| Panel Dimensions | Customizable (per customer drawing) |
| Thickness Tolerance | ±0.05 mm |
| Hole Position Tolerance | ±0.075 mm |
| Warpage & Twist | ≤0.5% of panel diagonal |
| Edge Finish | De-burred, Rounded Edges |
5. Environmental Performance
| Test Item | Condition | Result |
|---|---|---|
| Temperature Cycling | -40°C to +125°C, 1000 cycles | No delamination, open/short defects |
| Moisture Sensitivity Level (MSL) | MSL 3 (168 hours @ 30°C/60% RH) | Compliant |
| RoHS Compliance | Restricted Substances | Meets RoHS 2 Directive (2011/65/EU) |
| UL Certification | Flammability Rating | UL 94 V-0 |
6. Typical Applications
- Industrial control systems
- Automotive electronics (ADAS, infotainment)
- High-speed communication devices
- Medical diagnostic equipment
- Consumer IoT devices
7. Compliance & Certifications
- RoHS 2
- UL 94 V-0
- IPC-A-600 Class 2/3 (Acceptability of Printed Boards)
- ISO 9001:2015
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