RO4350 PCB

  • High-quality RO4350 PCB
  • Full range of RO4350 PCB
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What is the difference between RO4350 and RO4003C?

RO4000 series high frequency PCB materials feature low loss, low tolerance and excellent high frequency performance.

As shown in the picture on the right, the performance and parameters of these two materials are not very different.

The main difference is that RO4003C is a halogen-free material, which is more environmentally friendly than RO4350. Usually the customer decides which material to use based on the performance and suitability of the end product.


RO4350 Material Quality Standard

RO4350 is a type of Rogers imported sheet from the United States, and the material we purchase strictly adheres to the following important quality and safety standards.
1. UL standard
2. ISO standards
3. CE standard
4. REACH the standard
5. The IPC standard

RO4350 for high-performance applications

The continuous introduction of wireless communication, optical fiber communication, high-speed network data products, high-speed information, and wireless analog front-end processing have put forward higher requirements for digital signal technology processing, technology, and circuit PCB design.

The RO4350 PCB is specifically designed for high frequency and high-performance applications.


RO4350 PCB

Venture RO4350 PCB is consists of laminates that provide excellent rigidity when compared to FR4 and PTFE types. Our RO4350 PCB is made from thermoset materials that are filled with reinforced ceramic hydrocarbon/glass.

We manufacture RO4350 PCB with TG>280˚C high glass transition temperature. It is specifically designed to offer superior, cost-effective radio frequency and circuit productions. It is also manufactured for high-performance and high-volume commercial applications.

Your Leading RO4350 PCB Supplier in China

RO4350 PCB

Venture manufactured RO4350 PCB with high-frequency materials. These are also non-PTFE glass fiber reinforced ceramic/hydrocarbon laminates.

Its cost-effective production and excellent radio frequency performance result in a low-loss material. Meaning, our RO4350 PCB can be manufactured using the standard FR4 or standard epoxy/glass processes.

We manufacture RO4350 PCB with different laminate selections. Our RO4350 PCB is greatly reduced while increasing the operating frequencies to above 500MHz.

RO4350 PCB article 1

Our RO4350 PCB features low dielectric loss. It allows our RO4350 PCB in applications with a higher frequency limit. Venture RO4350 PCB also possesses characteristics needed for microwave developers. It is designed for applications including:

  • Filters
  • Coupling networks
  • Impedance-controlled transmission lines

Other than that, our RO4350 PCB low-temperature coefficient of the dielectric constant. Because of that, our RO4350 PCB can provide stable dielectric constant over a wide frequency range. This also makes our RO4350 PCB suitable for broadband applications.

If you are in need of high-quality RO4350 PCB, Venture can be your best manufacturer! In China, Venture becomes the most trusted supplier and manufacturer of RO4350 PCB for over 10 years.

RO4350 PCB article 2

Our 10 years of experience in manufacturing RO4350 PCB means that you can get the best quality products. As a professional, we can offer you a RO4350 PCB at a reasonable cost.

Whether you are a distributor or software integrator, Venture can support your business and projects by providing flexible payment terms.

At Venture, we also don’t have a minimum order required for every RO4350 PCB. Whether you have large or small quantity RO4350 PCB orders, you are always welcome at Venture!

Our happy and approachable customer service personnel will handle your inquiries and orders. They assure you to give you the best services without any hassle!

Send inquiries for your next RO4350 PCB orders!

RO 4350 PCB: The Ultimate FAQ Guide


If you have any question about RO 4350 PCB, you’ll find the answer right here.

This guide covers everything about this Rogers PCB material – from features, benefits, applications, to specifications, just to mention a few.

Keep reading to learn more.

How does RO 4350 PCB Compare to Rogers 4350 B PCB?

You can use both PCBs interchangeably, given that they have similar properties.

However, RO 4350B is an improved version of RO 4350 laminate and is a drop-in replacement for the existing designs without re-testing.

RO 4350B

RO 4350B

Both RO 4350 and RO 4350B follow similar manufacturing processes and maintain identical product specifications.

The long term thermal aging characteristics of RO 4350B is higher compared to RO 4350.

Similarly, RO 4350B also has a higher UL RTI rating but with similar electrical and mechanical properties as RO 4350.

Under What Circumstances Should You Select RO 4350 PCB?

RO 4350 PCB is suitable for use in high frequency, high volume, and high-performance commercial applications.

You should use RO 4350 PCB for applications to balance the cost of production, design requirements, and mass production.

RO 4350 PCB will provide superior RF performance at a profitable production cost.

Specifically, you should consider this PCB when you want to develop coupling networks, repeatable filter designs, and transmission lines with controlled impedance.

Furthermore, RO 4350 PCB is ideal for high-frequency applications with high signal conversion devices and high microprocessor operation speed.

Using standard, general-purpose PCBs in these applications will result in unreliable products that quickly fail under demanding operating conditions.

What Are the Features of RO 4350 PCB?

RO 4350 PCB is constructed using premium Rogers PCB laminates, thus ensuring top-notch and reliable PCB performance.

RO 4350 possess the following key benefits:

  • Very low dielectric constant
  • Low dielectric tolerance and loss of tangent
  • Suitable for high-frequency applications
  • The dielectric constant is stable over a wide frequency range
  • The laminate CTE is close to copper CTE
  • Excellent dimensional stability
  • Higher transitional temperature and decomposition temperature
  • Low electric noise
  • You can easily mass produce it
  • Good impedance control
  • Low water absorption

What Are the Benefits of RO 4350 PCB?

RO 4350 PCB has the following advantages:

 RO 4350

 RO 4350

  • Suitable for high-frequency application
  • Ideal for temperature-sensitive and high-temperature applications
  • Has quality and reliable plated through-hole
  • No requirement for special through-hole treatments
  • Suitable for mixed dielectric and multi-layer constructions
  • Easy to mass-produce
  • Has UL flammability rating of 94-VO

Can you use RO 4350 for High-Performance Applications?

Yes, RO 4350 PCB is specifically designed for high frequency and high-performance applications.

In essence, RO 4350 PCB will deliver higher performance levels, including high-speed signal transmission and low noise levels, that standard PCB cannot achieve

What Fabrication Factors Should You Consider When Working with RO 4350?

You should follow the guidelines provided by Rogers cooperation when fabricating RO 4350 laminates to consolidate a PCB.

Some of these factors include:

· Drilling

Entry/Exit materials: Use flat and rigid entry and exit materials to maintain copper burrs o the minimum.

Aluminum and other rigid composite boards are ideal for entry and exit materials though you can also use other conventional materials.

Maximum stack height: Ensure that you maintain the thickness on the material you are drilling to below 70% of the flue length.

It is inclusive of entry material’s thickness and penetration into backer material.

Drilling conditions: You should avoid using chip loads below 0.002″ and surface speed higher than 500SFM.

Determine the tool life by the quality of the hole and not the rate of tool wear.

The ceramic fillers’ sizes directly relate to the hole roughness, which creates topography conducive for hole-wall adhesion.

Deburring: Use standard nylon brush scrubber to deburr RO 4350 material.

· Copper Plating

You don’t need to apply any special treatment before conducting electroless copper plating.

Use standard epoxy/glass procedures for processing RO 4350 boards.

You don’t need to desmear the drilled holes because the high transitional temperatures of RO 4350 make it tolerant to smearing during drilling.

In case of aggressive drilling practices that can cause smearing, remove the resins by double passing through the alkaline permanganate process.

Alternatively, you can conventional CF4/O2 plasma cycle to remove the resins.

· Etching/Imaging

You can either chemically or mechanically prepare the panel surface for photoresist.

You can use any standard semi-aqueous or aqueous photoresists and any ideal commercially available copper etchants.

· Solder Mask

Use any ideal photo-imageable or screenable solder masks that are compatible with epoxy/glass laminates.

Do not mechanically scrub the exposed dielectric surface before applying the solder mask since you can achieve optimum bonding from ‘as etched’ surface.


You will not need to bake RO 4350 if your facility does not conduct baking for epoxy/glass.

In case you do bake epoxy/glass as a routine process, you should bake RO 4350 for 1 to 2 hours at between 121°C and 149°C.

The board can darken when you bake it in the presence of oxygen.

Though the darkening will not affect the board’s performance, you can avoid the darkening by undertaking baking in a vacuum or under the nitrogen gas supply.

· Shelf Life

You can store RO 4350 laminates indefinitely under ambient humid conditions and a temperature range of 13-30°C because they are inert to high humidity under these conditions.

However, exposure to high humidity can cause oxidation of metal claddings such as copper.

You can easily remove traces of corrosion from well-stored materials using a conventional pre-exposure cleaning procedure for PWBs.

· Routing

You can machine RO 4350 using carbide tools and typical conditions for working epoxy/glass.

You should prevent burring by etching copper foils away from routing channels.

For ease of removing debris, you should maintain a sack height based on 70% of the actual flute length.

Use can use diamond-cut router bits or carbide multi fluted spiral chip breakers tools.

You should maintain the surface speed below 500 SFM to extend the tool life.

Your tool life will generally exceed 50 linear feet when you route accordingly to the maximum allowable stack height.

What Precautions Should You Take When Fabricating RO 4350?

You should always follow sound working principles to ensure safety at the workplace. Some of the vital precautions include:

  • Work in a well-lit station
  • Select appropriate forks and pins to fix the small components of the PCB and avoid possible damage to components.
  • Wear suitable safety gear. Ensure that the goggles and glove you put on are fully operational.
  • Ensure that your power source is compatible with the voltage you select and is functioning correctly to avoid electric shocks and related problems.
  • Ensure that you tighten all the installations and connections to cover all potential leaks for short-circuiting.

What Factors Affect the Performance of RO 4350 PCB?

Performance of RO 4350 PCB primarily depends on construction material though the fabrication method also plays a fundamental role.

 RO 4350

 RO 4350

· Insertion Loss

Insertion loss significantly relies on the RO 4350 laminate thickness for RF/microwave PCBs.

It is specifically critical in applications with limited signal power.

Total insertion loss is a factor of four key parameters, including:

  • The dielectric loss of RO 4350 laminate
  • Circuit traces conductor loss
  • PCB’s leakage loss
  • Circuit traces’ radiation loss
  • The thickness of the PCB
  • Type of solder mask used
  • Properties of the surface finishing used
  • The roughness of the copper surface
  • Electrical, themal, and physical properties of the laminate
  • Product’s operating temperature

Why Should You Use RO 4350 for High-Frequency Applications?

RO 4350 has a very low dielectric constant, which stores relatively lower energy on its electric field.

This same quality, combined with low loss tangent, makes RO 4350 PCB ideal for high-frequency applications.

This is because it supports higher flow rates of electromagnetic energy.

What Type of Applications Use RO 4350 PCB?

You can use RO 4350 PCB in diverse types of applications. Some of them include:

· Active Safety

You can use RO 4350 PCB in vehicles automotive system design to avoid accidents.

You can use Rogers 4350 PCB for radar systems designed for sensor applications that can detect conditions that may result in a collision.

Automotive censorship works through advanced driver assistance systems (ADAS) capable of enabling drivers to sense static or dynamic objects on the road.

· Antenna Systems

The RO 4350 laminates ideal for fabricating PCBs that you can use for demanding and challenging operating conditions.

Such include automatic radar systems and military antenna systems.

The resulting PCB will offer low insertion loss at higher frequencies.

Consequently, you will be able to use RO 4350 PCBs for the construction of patch antennas, phased arrays, conformal antennas, and active electronically scanned arrays.

· Antennas

You can use RO 4350 PCB for mobile network antennas that connect fixed base stations and mobile users.

Selecting RO 4350 laminate for fabricating PCBs with high gains and low loss ant microwave frequencies is essential for manufacturing high-performance antennas.

Such antennas are mandatory if you want to meet the demanding signal requirements of both fixed and mobile wireless systems.

· Backhaul Radios

You should use RO 4350 PCBs when constructing backhaul radio links for 4G and 5G wireless communication networks.

RO 4350 has ultra-low dielectric constant and loss tangent making it suitable for constructing microwave radio links for 4G and 5G networks.

Such PCBs are ideal for use in higher bandwidths that operate at higher frequencies of up to 80 GHz due to reduced-roughness copper.

· LAA Devices and Carrier-Grade Wi-Fi

Demand for Carrier-grade Wi-Fi systems has grown substantially, thus demanding a higher need for mobile network capacity and performance.

RO 4350 PCB will satisfy the telecommunication provider’s requirement, which calls for the faults recovery time of fewer than 50 milliseconds.

Using RO 4350 PCB will help you address challenges arising from the latest trends in Wi-Fi antennas, thus providing better alternatives for less effective FR-4 laminates.

· Communication Systems

Using RO 4350 PCBs will enable you to optimize the performance of your RF and microwave technology and communication systems.

With the lower tangent loss, the material also provides a stable dielectric constant suitable for advanced microwave applications.

· Computing

You will use RO 4350 PCB for cloud computing that requires complex data processing, which provides network infrastructure necessary for intensive high-speed data transmission.

The model PCB is essential for designing superior computing systems that minimize latency and optimize data throughput in demanding applications.

· IP Infrastructure

Your RO 4350 PCB will provide superior mechanical/thermal performance, lower dielectric constant, and insertion loss required for demanding applications.

You will benefit from enhanced network performance due to faster data drives required of infrastructure service providers beyond 25 Gbps.

· Phased Array Radar Systems

RO 4350 PCB laminates possess the critical characteristics required for the fabrication of phased array radar systems.

The materials have a low and stable loss performance and a uniform dielectric constant at high frequencies.

· Power Amplifiers

Higher power amplifiers are fundamental factors in transmission signals to mobile users through remote radio heads and macro base stations.

Consequently, RO 4350 laminates with higher thermal conductivity and low loss dielectric play critical roles in fabricating the power amplifiers.

Furthermore, the laminates possess excellent long-term aging characteristics and stability over a wide range of temperatures.

Other applications include small cells and DAS applications, and applications for testing and conducting measurements.

What Test Can You Use to Determine the Dielectric Constant of RO 4350?

You can use diverse measurement techniques to determine the dielectric constant of RO 4350.

You can use a microwave vector network analyzer (VNA) to determine the reference circuits’ phase and amplitude characteristics.

The reference circuits may include stripline and microstrip transmission lines and other types of resonators.

Consequently, you can fabricate two microstrip transmission lines having different lengths on RO 4350 laminate having a precise thickness.

The set up will allow you to measure phases of the two lines using VNA.

The phase values difference between the two transmission lines will deliver and the Dk value of the RO 4350.

Alternatively, you can also use resonators and resonant cavities to measure the Dk of the laminates, then evaluate the resonators’ performance.

The Dk values vary to the test method and the test frequencies.

What Quality Standards Should Your RO 4350 PCB Meet?

Rogers 4350 PCB

 Rogers 4350 PCB

You should follow the IPC circuit production standards when fabricating your PCB.

Accordingly, these standards cover different PCB production procedures from start to finish.

Before production, you should develop your products’ terms and conditions to the specifications of IPC-T-50 standards.

The other classes of standards which are also vital in the design and fabrication of PCB cover the following production process:

  • Documentation of data transfer and electronic products; Material declaration
  • Design and land patterns; Including high speed/frequency materials
  • Printed board’s base material; Including copper foils
  • Qualification for printed boards; including the application of surface finishing and solder masks
  • Acceptability of printed boards; including The electronic test, test methods, advanced packaging, and repairs
  • Soldered electronic assemblies’ requirements. It includes test methods, storage, and handling, solderability, advanced packaging. Also include stencil design guidelines, assembly materials, repair, and SMT reliability.
  • Electronic assembly’s acceptability; including test methods, repairs
  • Requirements for acceptance for wire harness assemblies and cables
  • Acceptability of manufacturing standards. Also, include testing and inspection of electronic enclosures.

Why is the Dimensional Stability of RO 4350 laminate Material an Important Factor?

Dimensional stability of a PCB refers to its ability to resist dimensional change due to changes in humidity, temperature, stress exposure, or chemical treatment.

Quality PCB laminates must possess superb dimensional stability characteristics if you are to use it for constructing a multi-layer board of mixed dielectric.

Using RO 4350 PCB laminate ensures that you get quality and reliable through-holes even under harsh thermal shock conditions.

The transitional temperature of RO 4350 material is more than 280°C, which stabilizes its expansion properties at nearly all process temperatures in the circuit.

You can use standard FR-4 processing procedures to convert RO 4350 laminates into PCBs.

Furthermore, you will not need to apply any special surface treatment techniques such as sodium etching, that are mandatory for high-performance PTFT materials.

Generally, RO 4350 laminate is a heat-stable and rigid laminate that you can treat using automatic handling techniques.

What Flame Retardant Technology Does RO 4350 PCB Use?

RO 4350 has a UL Flammability rating of 94-0.

The flame retardant technology is compliant with RoHS specifications and will pass for applications requiring UL94V-O certification.

What Types of Wire Bonding Are There for RO 4350 PCB?

You will use wire bonding to maintain everything where it needs to be on the PCB.

You will use them to attach active and passive components and integrated circuits o the substrate.

You can also use wire bonding to connect different integrated circuits.

Some of the standard wire bonding techniques ideal for RO 4350 PCBs include:

· Lead Bonding

Lead bonding offers excellent mechanical integrity and lower resistance to electrical connection in two categories: true fusion welding and diffusion.

· Welded Bonds

There are different types of welded bonds, including:

  • Resistance welding
  • Parallel gap welding
  • Percussive Arc Welding
  • Electron beam welding
  • Laser welding
  • Soldering

· Diffusion Bonding

This technique uses a form of diffusion that makes joints without melting.

Some common types of diffusion wire bonding are:

  • Thermal compression bonding
  • Ultrasonic welding
  • Thermosonic bonding

How Does RO 4350 PCB Compare to FR-4 PCB?

RO 4350 material is a high-frequency material, unlike standard FR-4 PCBs.

Consequently, Rogers 4350 PCB and FR-4 PCB have the following key differences:

Rogers 4350 PCB

 Roger 4350 PCB

· Cost

You will pay more for RO 4350 PCB compared to FR-4 PCB. FR-4 laminates are relatively cheaper and have a lower processing cost compared to Rogers material.

However, RO 4350 PCB delivers higher performance and assures you quality for every bit of money spent.

Unless you are on budget and performance is not a primary concern, you should always consider RO 4350 laminate.

· Higher Frequencies

FR-4 PCBs are common with numerous low-frequency applications.

When you fabricate a PCB for high-frequency application, select RO 4350 PCB because FR-4 PCB will not deliver under such conditions.

Rogers laminates, in general, possess superior qualities for use in a high-frequency application.

You should always select RO 4350 PCBs for frequencies exceeding 500 MHz.

· Dissipation Factor

RO 4350 has a lower dissipation factor compared to FR-4 material, especially at higher frequencies.

For FR-4 PCBs, the dissipation increases with increasing frequency, while RO 4350 will maintain a stable Df over a wide range of frequency.

· Impedance Stability

Impedance is the measure of obstruction to the flow of electric current to that of energy upon applying some voltage.

Rogers 4350 material offers superior performance, especially when the PCB needs to operate with minimal variations over a broad temperature fluctuation.

· Dielectric Constant

RO 4350 PCBs possess some of the lowest Dk values of all time.

The laminate’s dielectric constant is 3.48 ± 0.05, compared to FR-4 Dk, which is about 4.5.

Consequently, PCBs with higher Dk values have accelerated break down rate compared to those with lower Dk.

· Temperature Management

RO 4350 has superior heat management properties compared to FR-4 material.

The better performance is based on the material’s low variation compared to FR-4 material and will excellently handle high temperatures.

Why Should You Understand CTE of RO 4350 laminate?

CTE measures the percentage of expansion of RO 4350 laminate in response to heating or cooling.

The expansion is expressed in parts per million per degree Celsius (ppm/°C).

Different materials have different CTEs. For example, the CTE of RO 4350 laminates on the X, Y, and Z laminates are 14, 16, and 50 ppm/°C, respectively.

On the other hand, copper has a CTE of 18 ppm/°C.

You have to carefully consider the mismatch between the laminate and copper CTE when fabricating your PCB.

The differences can cause problems because both materials will expand on different percentages when subjected to heat.

Specifically, mismatch in expansion during assembling and PCB fabrication process will cause joint failures and delamination as it goes through several thermal cycles.

You can level the mismatch between the laminates and copper by using reinforced woven glass cloth.

The reinforcement will enhance the strength of your substrate, thus limiting expansion along the X-Y plane.

Note that a quality laminate must not expand in the X-Y direction but has to expand in the Z-direction.

The transition temperature also plays a vital role in the material’s CTE.

The laminate’s expansion will remain linear until it reaches the transitional temperature, after which the expansion increases multiple folds.

RO 4350 laminate has a CTE close to that of copper, making it ideal for the fabrication of mixed dielectric multi-layer PCB because of the excellent dimensional stability.

The laminate also has a low CTE expansion along the Z-axis, providing a quality and reliable through-hole.

Since RO 4350 has a transitional temperature greater than 280°C, it offers stable expansion properties over the whole range of processing temperatures.

What are The Specifications of RO 4350 PCB?

RO 4350 PCB possess the following property specifications:

  • A dielectric constant of 3.48 ± 0.05, at 10 GHz
  • Thermal coefficient of +50 ppm/ °C at 0 to 100°C
  • A dissipation factor of 0.0040
  • CTE of 14, 16, and 50 along the X, Y, and Z-axis.
  • The thermal conductivity of 0.62
  • UL flammability rating of 94-VO

What Is the Importance of Applying Surface Treatment to RO 4350 PCB?

Surface finishing is a technology that is necessary for any PCB laminate material to ensure product quality and longevity.

Surface finishing has two significant functions:

  • Protection of exposed copper areas.
  • Provision of smooth surfaces for efficient component placement

What Functionality Test Can You Perform on RO 4350 PCB?

PCB functionality test is an integral part of PCB fabrication and ensures that your PCB operates as described.

You will perform a functionality test on a completely assembled RO 4350 PCB.

Preforming a functionality test will allow you to detect defects in almost all PCBs before shipment to the customers.

It also saves you money since you won’t have to give your electronics contract manufacturer (ECM) testing equipment.

Some necessary functionality testing that you can perform are:

  • Micro-sectioning analysis
  • X-ray inspection
  • PCB solderability test
  • PCB contamination test
  • Time-domain reflectometer testing
  • Solder float test
  • Peel test

Consequently, you will perform your test using computer programs, which subject the PCBs to similar conditions it is to operate under.

This type of test will examine the whole PCB assembly system and not just some components.

As you can see, there are many factors to consider when choosing RO 4350 PCB.

At Venture Electronics, we offer a range of PCB materials such as Isola PCB, Taconic PCB, Arlon PCB, Nelco PCB, Bergquist PCB, Ventec PCB, and Teflon PCB amongst others.

Contact us for all your RO 4350 PCB needs.

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