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20 mil RO4003C PCB
20 mil RO4003C PCB

RO4835 PCB 10mil - What Is the Difference Between RO4350B and RO4835?

  • June 25. 2024

The RO4835 PCB 10mil is a high-performance laminate designed by Rogers, offering enhanced stability at high temperatures and superior resistance to oxidation compared to other hydrocarbon materials. This PCB is specifically engineered for high-frequency applications and cost-effective circuit fabrication. By utilizing standard epoxy/glass (FR-4) processes, it provides an affordable solution without compromising on quality.

The difference between RO4350B and RO4835

RO4350B typically has a lower dielectric constant (Dk) of around 3.48, making it suitable for applications where maintaining consistent impedance is crucial. RO4835, on the other hand, has a slightly higher Dk, generally around 3.5, which can be advantageous for specific design requirements.


The RO4835 PCB 10mil boasts several notable features that make it an excellent choice for various applications. Firstly, it is RoHS compliant, ensuring it meets the necessary environmental standards. Additionally, it adheres to the IPC-4103 compliance, guaranteeing its reliability and adherence to industry standards.

The dielectric constant (Dk) of the RO4835 PCB 10mil is 3.48 +/- .05, offering consistent electrical performance. Its low dissipation factor of 0.0037 at 10 GHz ensures minimal signal loss, making it ideal for high-frequency applications. Moreover, with a glass transition temperature (Tg) exceeding 280 °C TMA, this PCB can withstand elevated temperatures without compromising its integrity.

The coefficient of thermal expansion is carefully controlled, with 10 ppm/°C on the X-axis, 12 ppm/°C on the Y-axis, and 31 ppm/°C on the Z-axis. This ensures dimensional stability and reliability under varying operating conditions.

RO4835 PCB 10mil


The RO4835 high frequency circuit board provides several significant benefits for its users:

1)Significantly Improved Oxidation Resistance:

Compared to typical thermoset microwave materials, the RO4835 laminate demonstrates superior resistance to oxidation. This characteristic enhances the longevity and reliability of the PCB, even in demanding environments.

2)Designed for Performance-Sensitive Applications:

The RO4835 PCB 10mil is specifically designed for high-volume applications that require superior performance. It excels in applications where high operating frequencies and precision are crucial.

3)Low Loss:

The RO4835 laminate offers exceptional electrical performance, allowing for applications with higher operating frequencies. It reduces signal loss, ensuring optimal signal integrity and performance. This low loss pcb material makes it an ideal choice for automotive applications where reliable and efficient signal transmission is paramount.

4)Tight Dielectric Constant Tolerance:

The RO4835 PCB 10mil exhibits a tightly controlled dielectric constant, enabling the creation of controlled impedance transmission lines. This ensures consistent signal propagation and minimizes impedance mismatch issues.

5)Lead-Free Process Compatible:

The PCB is compatible with lead-free processes, eliminating concerns regarding blistering or delamination during fabrication. This makes it a reliable and safe option for various manufacturing processes.

6)Low Z-Axis Expansion:

With low Z-axis expansion, the RO4835 PCB 10mil ensures the reliability of plated through holes. This characteristic minimizes the risk of failures in critical interconnects, improving the overall durability of the PCB.

7)Low In-Plane Expansion Coefficient:

The PCB maintains stability over a wide range of circuit processing temperatures due to its low in-plane expansion coefficient. This enables consistent performance and dimensional stability during the PCB manufacturing process.

PCB Stackup and Construction Details

The RO4835 PCB 10mil is a double layer circuit with a finished copper weight of 35um on both the top and bottom layers. The core of the PCB is composed of RO4835 dielectric material, measuring 10 mils (0.254mm) in thickness. This stackup configuration ensures excellent signal integrity and reliable performance.

The board dimensions of the RO4835 PCB 10mil are precisely measured at 55.46mm x 41.5mm, with a tolerance of +/- 0.15mm. It supports a minimum trace/space of 5/5 mils, enabling the creation of intricate circuitry. The minimum hole size supported is 0.4mm, accommodating various component packages and interconnections.

The finished board thickness is 0.3mm, providing a slim profile without compromising on structural integrity. The finished copper weight is 1 oz (1.4 mils) on all layers, ensuring sufficient conductivity and thermal management. The via plating thickness is 1 mil, guaranteeing reliable electrical connections throughout the PCB.

To protect the PCB and facilitate soldering, the surface finish of the RO4835 PCB 10mil is immersion gold. This finish provides excellent solderability and protects against oxidation, ensuring long-term reliability.

The PCB features a top silkscreen in white and a top solder mask in blue. The absence of a bottom silkscreen and bottom solder mask reduces complexity and cost while maintaining functionality. Additionally, there is no silkscreen on the solder pads, ensuring precise component placement and soldering accuracy.

Quality Assurance and Statistics

The RO4835 PCB 10mil Rogers substrate undergoes rigorous quality testing to meet industry standards. A 100% electrical test is performed to verify the integrity and functionality of the PCB. This ensures that each unit delivered to customers meets the requiredstandards for performance and reliability.

In terms of statistics, the RO4835 PCB 10mil consists of 27 components and a total of 56 pads. Among the pads, there are 34 thru-hole pads and 21 top surface mount technology (SMT) pads. The bottom surface mount technology (SMT) pads are not present in this particular PCB design. There are a total of 41 vias, which facilitate electrical connections between different layers of the PCB. The PCB design comprises two nets, ensuring proper signal routing and connectivity.

Accepted Standards and Worldwide Service

The Rogers RO4835 PCB adheres to the IPC-Class-2 standard, which is widely recognized and respected in the electronics industry. This standard ensures the highest level of quality and reliability in PCB manufacturing.

Our services are not limited to a specific region; we provide worldwide service. We understand the importance of catering to customers globally, and our team is well-equipped to handle international orders and deliver exceptional customer service regardless of location.

Typical Applications

The Rogers 4835 PCB 10mil finds applications in various industries due to its high-performance characteristics. Some typical applications include:

1.Automotive Radar and Sensors:

The PCB's low loss and high-frequency performance make it an ideal choice for automotive radar and sensor applications. It enables precise signal transmission and reception, contributing to the safety and efficiency of automotive systems.

2.Point-to-Point Microwave:

With its excellent electrical performance and low loss characteristics, the RO4835 PCB 10mil is suitable for point-to-point microwave applications. It ensures reliable and efficient signal transmission for long-distance communication systems.

3.Power Amplifiers:

Power amplifiers require stable and efficient signal transmission. The RO4835 PCB 10mil offers low loss and controlled impedance, making it a reliable choice for power amplifier applications. It enables high-power signal amplification with minimal distortion.

4.Phased-Array Radar:

Phased-array radar systems rely on precise signal control and transmission. The RO4835 PCB 10mil's tight dielectric constant tolerance and low loss properties ensure consistent performance in phased-array radar applications.

5.RF Components:

RF components demand high-frequency performance and low loss characteristics. The RO4835 PCB delivers on these requirements, making it an excellent choice for RF component applications such as filters, antennas, and transceivers.


In conclusion, the RO4835 PCB 10mil offers enhanced stability at high temperatures, improved oxidation resistance, and high-frequency performance. Its low loss characteristics, controlled impedance, and tight dielectric constant tolerance make it suitable for a wide range of applications. With worldwide service and adherence to industry standards, our high frequency PCB is a reliable and high-quality solution for your electronic circuit fabrication needs.

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