What Is Megtron 7 PCB?
A Megtron 7 PCB is a high-performance printed circuit board fabricated using Panasonic Megtron 7 laminate, an ultra-low loss material developed for high-speed digital and high-frequency signal transmission. Megtron 7 PCB are widely used in data centers, AI servers, networking equipment, and advanced computing systems where signal integrity is critical.
Compared with conventional FR-4 and standard high-Tg materials, Megtron 7 PCB offers significantly lower dielectric loss, better impedance stability, and superior signal integrity at very high data rates.
Key Material Properties of Megtron 7 PCB
Panasonic Megtron 7 laminate delivers outstanding electrical performance:
-
Dielectric constant (Dk ≈ 3.3–3.4)
Stable Dk supports precise impedance control. -
Ultra-low dissipation factor (Df ≈ 0.001 @ 10 GHz)
Minimizes insertion loss for high-speed signals. -
Excellent thermal reliability
Supports lead-free and high-temperature assembly. -
Low coefficient of thermal expansion (CTE)
Enhances plated through-hole reliability in multilayer designs. -
High glass transition temperature (Tg)
Ensures mechanical stability during fabrication and operation.
These properties make Megtron 7 PCB ideal for advanced digital systems.
Transmission loss performance Ranking in MEGTRON series
Frequency dependence by Transmission loss
Heat resistance of High Multi-layered
Buried Resistor Copper Foil specification
General properties
| Item | Test method | Condition | Unit | MEGTRON7 R-578Y(N) R-5785(N) Low Dk glass cloth |
MEGTRON7 R-578Y(GN) R-5785(GN) Low Dk glass cloth |
MEGTRON7 R-578Y(GE) R-5785(GE) Normal glass cloth |
|
| Glass transition temp.(Tg) | DSC | A | °C | 200 | 200 | 200 | |
| CTE z-axis | α1 | IPC-TM-650 2.4.24 |
A | ppm/°C | 42 | 42 | 42 |
| α2 | 280 | 280 | 280 | ||||
| T288(with copper) | IPC-TM-650 2.4.24.1 |
A | 分 | >120 | >120 | >120 | |
| Dielectric constant(Dk) | 13GHz 14GHz |
Balanced-type circular disk resonator |
C-24/23/50 | － | 3.31 [14GHz] | 3.31 [14GHz] | 3.60 [13GHz] |
| Dissipation factor(Df) | 0.0023 [14GHz] | 0.0023 [14GHz] | 0.0034 [13GHz] | ||||
| Peel strength* | 1oz(35μm) | IPC-TM-650 2.4.8 |
A | kN/m | 0.8 | 0.8 | 0.8 |
The sample thickness is 0.75mm.
* R-578Y(GN), R-5785(GN), R-578Y(GE), R-5785(GE): H-VLP2 Copper, R-578Y(N), R-5785(N): H-VLP Copper The above data are typical values and not guaranteed values.
Conclusion
A Megtron 7 PCB is an advanced solution for high-speed and high-frequency applications where ultra-low loss and signal integrity are critical. With outstanding electrical performance and reliability, Megtron 7 PCBs enable next-generation servers, AI systems, and networking equipment.
Choosing an experienced Megtron 7 PCB manufacturer ensures optimized stack-up design, accurate impedance control, and consistent production quality.
