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Panasonic 4SMEGTRON 4/4S: A High-Performance Solution for Low Dk and High Tg Applications
Panasonic 4SMEGTRON 4/4S is designed for Low Dk and High Tg applications, specifically for network equipment, server, routers and measuring instruments. The main attributes of MEGTRON 4/4S are: low dielectric constant and dielectric dissipation factor (Dk = 3.8 and Df = .005 @ 1GHz), Lead-Free soldering RoHS compliant, and High Heat Resistance.
MEGTRON 4S is an improved version of MEGTRON 4 with higher Tg, suitable for multi-lamination cycles and hybrid builds. MEGTRON 4/4S meets IPC specification 4101 /91 /102.
Part Numbers
R-5725 / R-5725S Laminate
R-5620 / R-5620S Prepreg
Features
Low Dk = 3.8, Low Df = 0.005 (@ 1GHz)
Low transmission loss of less than 50% of conventional FR-4
Excellent through hole reliability 10 times better than our conventional high Tg FR-4 (T/C)
Lead-free, ROHS-compliant soldering
High heat resistance
Test Methods for MEGTRON 4S and MEGTRON 4
MEGTRON 4S – Test method used for Tg: DSC; Dk and Df @ 1GHz
MEGTRON 4 – Test method used for Tg: DSC; Dk and Df @ 1GHz
General Properties
| Item | Test method | Condition | Unit | MEGTRON4 | R-5725 | MEGTRON4S | R-5725S |
|---|---|---|---|---|---|---|---|
| Glass transition temp.(Tg) | DSC | A | °C | 176 | 200 | – | – |
| Thermal decomposition temp.(Td) | TGA | A | °C | 360 | 360 | – | – |
| CTE x-axis | α1 | IPC-TM-650 2.4.24 | A | ppm/°C | 12-14 | 12-14 | – |
| CTE y-axis | 13-15 | 13-15 | – | – | – | – | – |
| CTE z-axis | α1 | IPC-TM-650 2.4.24 | A | 35 | 32 | – | – |
| α2 | 265 | 250 | – | – | – | – | |
| T288(with copper) | IPC-TM-650 2.4.24.1 | A | min | 30 | 50 | – | – |
| Dielectric constant(Dk) | 10GHz | IPC-TM-650 2.5.5.5 | C-24/23/50 | – | 3.8 | 3.8 | – |
| Dissipation factor(Df) | 0.007 | 0.007 | – | – | – | – | |
| Water absorption | IPC-TM-650 2.6.2.1 | D-24/23 | % | 0.14 | 0.14 | – | – |
| Flexural modulus | Fill | JIS C 6481 | A | GPa | 23 | 23 | – |
| Peel strength* | 1oz(35μm) | IPC-TM-650 2.4.8 | A | kN/m | 1.1 | 1.3 | – |
