Shengyi S1141 PCB material is widely used in cost-sensitive electronics manufacturing due to its stable performance and reliable processing characteristics. As a standard FR-4 laminate, it offers balanced thermal, electrical, and mechanical properties, making it suitable for a wide range of PCB applications.
What Is Shengyi S1141 PCB Material?
Shengyi S1141 is a mid-Tg FR-4 epoxy glass laminate, designed for general-purpose PCB fabrication. It belongs to the Shengyi standard FR4 material series and is commonly used in multilayer PCB production.
Key characteristics include:
- Tg around 140°C
- Good mechanical stability
- Compatible with standard SMT processes
- Cost-effective compared to high-Tg materials
Unlike high-end laminates, S1141 focuses on manufacturing efficiency and affordability, which is why it remains popular in high-volume production.
Shengyi S1141 FR4 Datasheet
Below is a detailed datasheet-style specification table for Shengyi S1141 material. These values are typical and may vary slightly depending on resin content and laminate thickness.
Electrical Properties
| Parameter | Typical Value | Test Condition |
| Dielectric Constant (Dk) | 4.3 ± 0.1 | @1MHz |
| Dielectric Constant (Dk) | 4.1 – 4.2 | @1GHz |
| Dissipation Factor (Df) | 0.018 | @1MHz |
| Dissipation Factor (Df) | 0.015 – 0.017 | @1GHz |
| Volume Resistivity | ≥ 1×10⁶ MΩ·cm | C-96/35/90 |
| Surface Resistivity | ≥ 1×10⁵ MΩ | C-96/35/90 |
| Dielectric Breakdown Voltage | ≥ 40 kV | ASTM D149 |
Thermal Properties
| Parameter | Typical Value | Test Method |
| Glass Transition Temperature (Tg) | ~170°C | DSC |
| Thermal Decomposition (Td) | >300°C | TGA (5%) |
| T260 | ≥ 60 min | IPC-TM-650 |
| T288 | ≥ 20 min | IPC-TM-650 |
| Z-axis CTE (Below Tg) | ~50 ppm/°C | TMA |
| Z-axis CTE (Above Tg) | ~260 ppm/°C | TMA |
Mechanical Properties
| Parameter | Typical Value | Test Method |
| Flexural Strength | ≥ 450 MPa | IPC-TM-650 |
| Peel Strength (1 oz Cu) | ≥ 1.0 N/mm | IPC-TM-650 |
| Density | ~1.85 g/cm³ | ASTM D792 |
Physical & Reliability Properties
| Parameter | Typical Value | Condition |
| Moisture Absorption | ≤ 0.15% | D-24/23 |
| Flammability Rating | UL94 V-0 | UL Standard |
| CAF Resistance | High | IPC standard |
| Thermal Conductivity | ~0.3 W/m·K | Typical |
When designing impedance-controlled PCBs using S1141, it is recommended to:
- Use field solver tools for stack-up calculation
- Consider frequency-dependent Dk/Df variation
- Validate with impedance coupons during fabrication
Why Choose Shengyi S1141 Over Standard FR-4?
Compared with conventional FR-4 materials, S1141 provides noticeable improvements in electrical stability and signal transmission quality.
| Feature | Standard FR-4 | Shengyi S1141 |
| Signal Loss | Higher | Lower |
| Impedance Stability | Moderate | More stable |
| High-Speed Support | Limited | Suitable for GHz-level |
| Thermal Reliability | Standard | Enhanced |
| Cost | Low | Moderate |
When signal frequency exceeds ~1GHz or edge rates become fast, standard FR-4 begins to show higher insertion loss. S1141 mitigates this issue without moving to expensive RF materials.
What Applications Use Shengyi S1141 PCB Material?
Shengyi S1141 is widely adopted in applications where signal integrity, reliability, and cost balance are required.
Typical Applications
- Networking equipment (routers, switches)
- Industrial control systems
- Automotive electronics (ADAS, control modules)
- Power supply and inverter boards
- Communication infrastructure
- Consumer electronics with high-speed interfaces
How Does Shengyi S1141 Compare to Rogers Materials?
S1141 is often considered a cost-effective alternative to high-frequency laminates like Rogers.
| Parameter | S1141 | Rogers (e.g., RO4350B) |
| Cost | Medium | High |
| Df | Moderate | Very Low |
| RF Performance | Good | Excellent |
| Processing | FR-4 compatible | Special handling |
| Application | Digital + mid RF | High-frequency RF |
Conclusion:
- Choose S1141 for high-speed digital and cost-sensitive designs
- Choose Rogers for pure RF and microwave applications
Get a Quote for Shengyi S1141 PCB Today
If your project requires stable signal performance, controlled impedance, and cost efficiency, Shengyi S1141 is a strong candidate.
At EBest Circuit (Best Technology), we provide:
- Free DFM analysis
- Material selection guidance
- Fast prototyping and mass production
📩 Contact us:
sales@bestpcbs.com
sales@bestpcb.vn
FAQs
1. What is the dielectric constant of Shengyi S1141?
The dielectric constant typically ranges from 4.1 to 4.3 at 1GHz, offering stable impedance control for high-speed designs.
2. Is S1141 better than standard FR-4?
Yes, it provides lower loss and better signal integrity, making it more suitable for high-speed applications.
3. Can S1141 replace Rogers materials?
Partially. It can replace Rogers in mid-frequency applications, but not in high-frequency RF designs above several GHz.
4. Is Shengyi S1141 suitable for automotive electronics?
Yes, due to its thermal stability and reliability, it is widely used in automotive control systems.
5. What layer count is suitable for S1141?
It is commonly used in 4-layer to 16-layer PCBs, and can support higher layer counts depending on design.