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Introduction
Thermoset laminate materials, including FR-4, are susceptible to oxidation over time and with increased temperatures. This can lead to a slight rise in both the dielectric constant and dissipation factor of the circuit substrate. Rogers' RO4835 laminate offers enhanced stability at elevated temperatures and is more resistant to oxidation than other hydrocarbon materials.
It offers electrical and mechanical properties similar to those of RO4350B laminates, making it suitable for high-frequency applications and cost-effective circuit manufacturing. These laminates are low-loss materials that work well with standard epoxy/glass (FR-4) processes.
Features
RO4835 is RoHS compliant, meeting environmental standards and making it suitable for applications requiring UL 94 V-0 certification for flame retardancy.
They are available with Rogers proprietary LoPro Reverse treated copper foil, which is perfect for applications that required low insertion loss.
RO4835's dielectric constant of 3.48 with tight tolerances ensures consistent electrical performance, critical for signal integrity in RF and microwave circuits.
But that’s not all . RO4835 exhibits low signal loss with a dissipation factor of 0.0037 at 10 GHz, making it a reliable choice for high-frequency applications where minimal loss is essential.
Additionally, it features exceptional CTE values of 10, 12, and 31 ppm/°C in the X, Y, and Z directions, respectively.
| PCB Material | Hydrocarbon Ceramic Laminates |
| Designation | RO4835 |
| Dielectric Constant | 3.48 (10 GHz) |
| Dissipation Factor | 0.0037 (10 GHz) |
| Layer Count | Single Sided PCB, Double Sided PCB, Multilayer PCB, Hybrid PCB |
| Copper Weight: | 1oz (35µm), 2oz (70µm) |
| Dielectric Thickness (ED copper) | 6.6mil (0.168mm), 10mil (0.254mm), 20mil (0.508mm), 30mil (0.762mm), 60mil (1.524mm) |
| Dielectric Thickness (LoPro copper) | 4mil (0.102mm), 7.3mil (0.186mm), 10.7mil (0.272mm), 20.7mil (0.526mm), 30.7mil (0.780mm), 60.7mil (1.542mm) |
| PCB Size | ≤400mm X 500mm |
| Solder Mask | Green, Black, Blue, Yellow, Red etc. |
| Surface Finish | Bare copper, HASL, Immersion gold, Immersion silver, Immersion tin, OSP, Pure gold, ENEPIG etc.. |
PCB Capability
Our PCB manufacturing capabilities encompass a variety of layer configurations, including single-sided, double-sided, multi-layer, and hybrid PCBs.
For copper weight, 1oz (35µm) and 2oz (70µm) are available for RO4835 PCBs to meet diverse conductivity needs.
The dielectric thickness is flexible, ranging from 6.6 mil (0.168 mm) to 60 mil (1.524 mm) for ED copper, and from 4 mil (0.102 mm) to 60.7 mil (1.542 mm) for LoPro copper, allowing for customized design specifications.
For panel dimension, we can accommodate a maximum PCB size of up to 400mm x 500mm.
We provide multiple solder mask colors, including green, black, blue, yellow, and red, enabling customization to suit visual preferences.
Finally, we offer various surface finish options such as bare copper, HASL, immersion gold, immersion silver, immersion tin, OSP, and pure gold plating, ensuring compatibility with different assembly processes.
Applications
The RO4835 PCB is commonly used in various applications, including automotive radar and sensors, point-to-point microwave communication, power amplifiers, phased-array radar, and RF components.