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What is Rogers ULTRALAM 3850 PCB

Rogers Corporation is known for producing high-grade laminates that feature exceptional mechanical and electrical properties. Rogers ULTRALAM 3850 is another type of laminate from Rogers Corporation.  ULTRALAM 3850 is a high-frequency laminate that uses liquid crystalline polymer as its dielectric film.

These materials were specifically designed for both multilayer and single-layer substrate constructions. These laminates are suitable for high frequency and high-speed applications in computer data links, telecommunication networks, automotive radar systems, and other high-grade applications.

These adhesiveless materials are known for their low dielectric constant and dielectric loss. These properties are required for designing high-speed and high-frequency products. ULTRALAM 3850 is a double-clad laminate utilized for multilayer constructions.

These laminates feature great electrical, mechanical, environmental, and thermal properties that meet the requirements of several applications. ULTRALAM 3850 can be used for multilayer constructions that feature ULTRALAM 3908 bonding film.

These laminates offer high-performance solutions that allow the production of internet connectivity, clean energy, and other technologies. The high temperature of this laminate helps it to increase the processing temperature window of the multilayer board and as well as withstand multiple solder reflow processes.

Rogers ULTRALAM 3850 is a high-frequency material available in double copper-clad. These laminates make the construction of high-speed and high-frequency multilayer circuit boards easy. They are designed to provide lasting solutions to designer’s needs.

Properties of Rogers ULTRALAM 3850

ULTRALAM 3850 has unique properties that make it an ideal option for high-performance applications like automotive radar systems, telecommunication network equipment, etc.

Stable and low dielectric constant (Dk) 

ULTRALAM 3850 features a low dielectric constant of 2.9 at 10 GHz, which means it is ideal for insulating purposes. This material doesn’t break down easily when exposed to intense electric fields. Due to its low and stable Dk, it is used in several applications.

Low dissipation factor

The dissipation factor of this laminate is measured at 0.0025 at 10GHz. The dissipation factor of a laminate reveals how it performs in different environments and applications. This laminate features a low dissipation factor which makes it a good insulating material, it remains the same when exposed to any kind of temperature.

Coefficient of thermal expansion

The coefficient of thermal expansion measures how the size of a material changes when exposed to a different temperature. The CTE of ULTRALAM 3850 is 17 ppm/°C between 30.0 – 150 °C.

Dimensional stability

The dimensional stability is between -0.03% and -0.06%. This indicates that this laminate will maintain its original dimensions when exposed to various environmental conditions.

Low moisture absorption

Rogers ULTRALAM 3850 laminates can withstand a humid environment. This material has moisture absorption of 0.004 at 23°C.

Benefits of Rogers ULTRALAM 3850

Due to the mechanical and electrical properties of ULTRALAM 3850, these materials are used in high-frequency applications.

Excellent thickness uniformity: This liquid crystalline polymeric material offers exceptional thickness uniformity that ensures maximum signal integrity.

Stable electrical properties: These laminates feature stable and reliable electrical properties. Rogers ULTRALAM 3850 can conduct electrical current which makes them well suited for applications such as telecommunication networks, radar systems, etc.

Flame resistant: These laminates offer fire resistance in severe conditions. ULTRALAM 3850 doesn’t melt when exposed to severe heat. These laminates feature flame-resistant properties.

High chemical resistance: ULTRALAM 3850 materials are resistant to chemical reagents. These polymeric materials have high chemical resistance, hence, can resist chemical attack. Due to their high chemical resistance, they are corrosion-resistant. ULTRALAM 3850 chemical resistance is measured at 98.7%.

Other benefits include:

  • Easily bends for flexible and conformal applications
  • Provides design flexibility and optimizes circuit density needs
  • Enables utilization of thinner dielectric layer with low signal distortion
  • Maintains stable dimensional, mechanical, and electrical properties in a moist environment
  • Suitable for high frequency and high-speed applications

Applications of Rogers ULTRALAM 3850

ULTRALAM 3850 laminates are recommended for high-frequency applications. These laminates are used in RF devices, telecommunication network tools, etc.

Base station antennas: Base station antennas offer cellular connectivity to users. These antennas are utilized in covering multiple frequency bands or single frequency bands. Rogers ULTRALAM 3850 laminate is one of the major components of base station antennas.

Military satellites and radar sensors: ULTRALAM 3850 is a polymeric material essential for designing devices like military satellites and radar sensors. Radar sensors change microwave echo signals to electrical signals.

While military satellites can see things that are larger on the ground, radar sensors can determine the speed of an object along with its direction.  Due to Rogers ULTRALAM 3850 properties, this laminate is a go-to option for automotive radar sensor designers.

Chip packaging: Chip packaging, also known as Integrated Circuit (IC) packaging requires the use of high speed and high-frequency materials like Rogers ULTRALAM 3850. These laminates can withstand a high temperature, which makes them well suited for any environmental condition. Chip packaging plays a vital role in the electronics industry.

Micro-electromechanical systems (MEMs): The micro-electromechanical systems feature both electronic and mechanical components. MEMs are regarded as the framework of new electronics and ULTRALAM 3850 are a core part of these systems.  This material features properties that meet the increasing demands of MEMs designers.

Handheld and RF devices: Rogers ULTRALAM 3850 circuit materials are required in designing handheld and radio frequency devices. Laminates with stable electrical, dimensional, and mechanical properties meet the needs of radio frequency devices.

RF helps to send and receive radio signals between two devices.  RF is needed in radar systems, remote control, television broadcasting, etc. ULTRALAM 3850 laminates have thickness uniformity that helps to achieve optimal signal integrity.


Rogers ULTRALAM 3850 circuit material utilizes LCP as its dielectric film which makes it unique. This material can be combined with ULTRALAM 3908 films to design adhesiveless multi-layer circuit constructions. Due to its low dielectric constant and low dielectric loss, this laminate is suitable in applications that require high frequency.

This laminate also features other exceptional properties which are required for high-temperature and high-speed products. These materials also feature copper-clad and offer high-frequency solutions to designers’ needs. ULTRALAM 3850 is a widely used and recommended laminate for several high-frequency applications.




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