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RO4830 High Frequency PCB
Introduction
Rogers' RO4830 high frequency laminates are thermoset materials that provide a dependable and cost-effective substitute for traditional PTFE based laminates.
RO4830 thermoset laminates are particularly suitable for millimeter wave applications that require cost-efficiency, such as automotive radar sensors operating in the 76-81 GHz frequency range. These laminates can be manufactured using standard FR-4 processes and are specifically designed for use as cap layers in FR-4 multi-layer board designs commonly employed in PCB applications for 76-81 GHz automotive radar sensors.
Features
RO4830 has a dielectric constant of 3.24, making it an excellent choice for high-frequency applications.
It exhibits an impressive insertion loss of just 2.2 dB/in for 5mil thickness and reduced to 1.8 dB/in for 9.4mil thickness at 77 GHz. This low insertion loss helps to maintain signal integrity even at high frequencies, resulting in reliable and accurate data transmission.
The laminates hold a UL 94 V-0 flame retardant rating and feature an optimized filler, resin, and glass composite system.
The laminates utilize reverse treated smooth LoPro® copper foil to improves signal quality and contributes to more efficient and consistent electrical performance.
PCB Capability
We offer a wide range of capabilities to meet your specific needs. The PCBs can be designed as single-sided, double-sided, multi-layer, or hybrid configurations.
When it comes to copper weight, we provide options for 1oz (35µm) and 2oz (70µm).
There’re two dielectric thickness for RO4830 PCBs, i.e. 5mil (0.127mm) and 9.4mil (0.239mm).
We can accommodate dimensions up to 400mm x 500mm and you have the freedom to select from a variety of solder mask colors, including green, black, blue, yellow, red, and more.
We also offer a diverse range of surface finish options to meet your specific requirements, including immersion gold, HASL, immersion silver, immersion tin, ENEPIG, OSP, bare copper, pure gold etc.
| Property | Typical Values
RO4830 | Units | Condition | Test Method |
| Dielectric Thickness |
| 0.005” | 0.0095” |
| Dielectric Constant, εr Design | 3.24 | 3.24 | - | 77 GHz | microstrip differential phase length |
| Transmission Line Loss | 2.2 | 1.8 | dB/in | 77 GHz | microstrip differential phase length |
| Dissipation Factor, tan δ | 0.0033 | 0.0032 | - | 10 GHz | split-post dielctric resonator |
| Thermal Coefficient of εr (z direction) | -30 | -30 | ppm/°C | -50°C to 150°C | IPC-TM-650 2.5.5.5 |
| Dielectric Strength | 78.7 | 59.1 | kV/mm | 48 hrs @ 50°C | IPC-TM-650, 2.5.6.2 |
| 2000 | 1500 | V/mil |
| Water Absorption | 0.15 | 0.13 | % | D-48/50 | ASTM D570 |
| Peel Strength after Thermal Stress | 0.67 | 0.67 | N/mm | 18 micron reverse
treated EDfoil | IPC-TM-650 2.4.8 |
| 3.8 | 3.8 | lbs/in |
| Flammability Rating | V-0 | V-0 | - | C-48/23/50 | UL94 |
| Decomposition Temperature | 408 | 412 | °C | - | ASTM D3850 |
| Time to Delamination (T288) | >30 | >30 | minutes | with Cu | IPC-TM-650, 2.4.24.1 |
| Lead-Free Process Capable | YES | YES | - | - | - |
| Thermal Conductivity (calculated) | 0.45 | 0.47 | W/mK | 50°C | Through-plane calculation with series
mixing rule |
| CTE | x,y | 23 | 21 | ppm/°C | 0 to 150°C | IPC-TM-650 2.4.41 |
| z | 110 | 83 |
Typical Applications
RO4830 PCBs are intended used for 76-81 GHz automotive radar sensors as well as automotive radar antennas etc.
Thank you and see you next time.
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Rogers' RO4830 high frequency substrates design for Single Sided, Double Sided, Multi-layer PCB, Hybrid PCB Images
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