Detailed Introduction to Rogers High-Frequency Multilayer PCBs

Material features, a four-material parameter table and the process disciplines for lamination, drilling and soldering that keep Rogers multilayer builds stable.

Rogers high-frequency multilayer PCBs have earned their reputation in RF and microwave applications through low loss, stable dielectric behavior and low thermal expansion. The company’s material families — RT, TMM and RO — each map onto different points of the performance spectrum, and multilayer designs built on them demand careful balancing of electrical, thermal and mechanical performance.

Key Features of Rogers Multilayer Builds

Four properties recur across the material families and drive most selection decisions.

Electrical Performance

Extremely low dielectric loss yields low insertion loss at high frequency. Dk stays stable across a wide frequency band, keeping signal transmission predictable, and passive intermodulation (PIM) stays low — which reduces interference in wireless systems, a property antenna and infrastructure designers care about as much as raw loss.

Thermal Management

High thermal conductivity suits high-power circuits, and low CTE keeps the stack dimensionally stable through thermal cycling — the pairing that protects plated through-holes in boards that see reflow after reflow.

Mechanical Strength and Dimensional Stability

Excellent flatness and strength make complex multilayer stacks practical, and long-term environmental stability keeps those stacks behaving the same after years in the field as they did on day one.

Hybrid Stack-Up Compatibility

Rogers layers combine with FR-4 in hybrid stack-ups that balance cost against performance — putting the expensive low-loss material only where the RF lives. The bonding and registration considerations for such multilayer work are analyzed in the multilayer lamination considerations guide, and the various plating and etching processes the materials support carry over from standard practice.

Typical Applications

The material families show up wherever high-frequency signals and hard environments meet:

5G base stations: antennas, power amplifiers and filters carrying high-frequency signals efficiently.
Radar systems: automotive millimeter-wave radar, aviation radar and defense radar.
Satellite and aerospace: high-frequency satellite systems plus high-temperature, high-radiation environments.
Medical equipment: MRI machines and RF therapy devices where signal accuracy is non-negotiable.
Filters and power modules: complex high-frequency circuits and RF power stages.

Common Materials at a Glance

Four materials cover the majority of multilayer projects. Their parameters, and where each earns its place, are compared below — RO4350B’s own application and fabrication profile is detailed separately in the RO4350B applications and fabrication guide.

Material	Dk	Df	Strength	Typical use
RO4350B	3.48	0.0037	Cost-effective, FR-4 process compatible	5G antennas, filters, power amplifiers
RO3003	3.0	0.0013	Low dielectric loss, high power capability	Radar, high-frequency microwave communication
RT/duroid 5880	2.2	0.0009	Ultra-low loss, low PIM	Satellite communication, millimeter-wave
TMM10	9.8	0.0022	High Dk for compact designs	Miniaturized antennas and filters

Processing Considerations

Rogers materials reward careful process control — the disciplines differ from FR-4, and the general high-frequency PCB processing considerations apply on top of the material-specific points below.

Lamination and Drilling

Precise press pressure avoids delamination and warping, and the right prepreg gives strong layer bonding. For drilling, coated bits minimize friction and damage, with feed and speed controlled to prevent tearing or excessive burrs — the parameters are less forgiving than FR-4 and should come from the laminate supplier’s guidance, such as the RT/duroid 5880 production guidelines.

Cutting, Surface and Soldering

Laser cutting is preferred for its precision and low mechanical stress, with post-cut edge polishing to remove burrs. Mild cleaning solutions protect the chemical-sensitive surfaces, plating parameters need tight control for uniformity, and soldering calls for preheat at 100–120 °C with low-temperature alloys to limit thermal stress.

Plating and Etching

Etch time and acid concentration need careful control to avoid over-etching — the thin, precise traces typical of high-frequency designs have little margin. Done within these disciplines, a Rogers multilayer board delivers stable electrical performance through its service life rather than just at first article.

Frequently Asked Questions

Why choose a hybrid Rogers/FR-4 stack-up instead of all-Rogers?

Cost. RF traces only occupy part of most boards; putting low-loss Rogers layers only where signals are critical and using FR-4 for the rest keeps performance where it matters and cuts material cost substantially.

What does low PIM mean in practice?

Passive intermodulation distortion creates unwanted mixing products when strong signals meet nonlinear materials or junctions. In antennas and infrastructure, low-PIM materials keep those spurious signals out of receive bands.

When is TMM10 the right choice?

When board area is the binding constraint. Its Dk of 9.8 shrinks antennas and filters dramatically, at the cost of tighter processing discipline compared with mid-Dk materials.

Do Rogers materials need special drilling?

Coated drill bits and controlled feed/speed are recommended to avoid tearing and burrs. Pure PTFE grades additionally need special hole preparation, but the RO4000 family runs standard FR-4 hole processes.

Designing a Rogers multilayer stack-up?

Send your layer count, materials and RF bands and we will confirm the stack-up, bonding materials and process controls your board needs.

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Detailed Introduction to Rogers High-Frequency Multilayer PCBs

Table of Contents

Key Features of Rogers Multilayer Builds

Electrical Performance

Thermal Management

Mechanical Strength and Dimensional Stability

Hybrid Stack-Up Compatibility

Typical Applications

Common Materials at a Glance

Processing Considerations

Lamination and Drilling

Cutting, Surface and Soldering

Plating and Etching

Frequently Asked Questions

Designing a Rogers multilayer stack-up?

Table of Contents

Detailed Introduction to Rogers High-Frequency Multilayer PCBs

Table of Contents

Key Features of Rogers Multilayer Builds

Electrical Performance

Thermal Management

Mechanical Strength and Dimensional Stability

Hybrid Stack-Up Compatibility

Typical Applications

Common Materials at a Glance

Processing Considerations

Lamination and Drilling

Cutting, Surface and Soldering

Plating and Etching

Frequently Asked Questions

Designing a Rogers multilayer stack-up?

Table of Contents

PCB Assembly

PCBA Services

Quality

Application

Resources

Printed Circuit Board

RF PCB

Quality

PCB Surface Finish

Printed Circuit Board

Drills & Throughplating

Profiles

PCB Stackup

Resources