Rogers 4350b Has Great Advantages in High Frequency Applications
When circuits operate at frequencies above 500MHz, the range of materials a design engineer can choose from is significantly reduced.
Rogers RO4350b material enables RF engineers to easily design circuits for network matching and transmission line impedance control applications.
Due to its low dielectric loss characteristics, RO4350b material has advantages compared with ordinary circuit raw materials in high frequency applications. In addition, its dielectric constant fluctuating with temperature is almost the lowest in its class.
Key Tips Before Manufacturing Rogers 4350b PCB
●Drilling.Ned to keep the drilling speed below 500 Surface Feet Per Minute.In addition, you must use standard inlet and outlet materials.
●Processing outer and inner layers.The outer layer should be treated with lead plating, copper plating, electrolytic tin and other processes. The inner layer should use a thicker core for mechanical processing and a thinner core for chemical processing. This will help with copper etching.
●Follow the adhesive system guidelinesRogers 4350b PCB can be used in thermoplastic and thermoset systems. Therefore, you should follow the guidelines for adhesive systems.
How to Choose Your Best Rogers 4350b PCB Supplier?
Dielectric constant, material, dissipation factor, glass transition temperature (Tg), coefficient of thermal expansion, shear strength, etc. are the properties you need to know to choose the best Rogers 4350b laminate.
RO4350b material is compatible with high frequency signals. It has a low dielectric constant (3.66) and dielectric thickness (0.066).
Therefore, the CTE of the Rogers 4350b PCB is lower. Rogers 4350b laminates do not require through-hole processing. You can also use these laminates for high power RF.
Unlike other Roger PCV laminates or PTFE-based laminates, Roger 4350b PCB laminates are easy to handle.
Last but important, an affordable price with great flexibility is very important in making the Roger 4350b PCB laminate.
Venture Rogers 4350b is a high-frequency circuit material. It is reinforced with hydrocarbon ceramic laminates. Our Rogers 4350b is designed for performance with high-volume and sensitive applications. Lots of advanced features are equipped into our Rogers 4350b. That is why it is perfect for the following applications:
- Power amplifiers and cellular base station antennas
- LNBs for direct broadcast satellites
- RF identification tags
- Automotive sensors and radars
Your Leading Rogers 4350b Supplier in China
Venture Rogers 4350b is a hydrocarbon ceramic laminate. This is designed to provide excellent high-frequency performance as well as low-cost circuit fabrication.
Our Rogers 4350b is equipped with low loss and dielectric tolerance. It can provide you exceptional electrical performance and allows applications with higher operating frequencies.
Other than that, we manufacture Rogers 4350b that has controlled impedance and repeatable design for transmission lines. This makes our Rogers 4350b ideal for any broadband applications.
Additionally, our Rogers 4350b is designed with a low thermal coefficient of dielectric constant. Because of that, our Rogers 4350b can provide outstanding dimensional stability.
We also produce Rogers 4350b with low Z-axis expansion. Thus, our Rogers 4350b can provide a reliable plated through-hole quality.
Moreover, Venture Rogers 4350b is equipped with a low in-plane expansion coefficient. It will still be stable even in an entire range of circuit processing temperatures.
Because of its advanced features, our Rogers 4350b can best applicable for cellular base station antennas, power amplifiers, RF identification tags, automotive radar, sensor, and LNBs for direct broadcast satellites.
Are you looking for a trusted manufacturer of premium-quality Rogers 4350b? No need to worry! Venture has more than 10 years of experience in Rogers 4350b manufacturing. More customers from around the world have relied on Venture as their supplier. You can also trust Venture!
Whether you are a product designer, maker, system integrator, electrical engineer, or retailer, we can always support you through providing budget-friendly Rogers 4350b.
We also offer flexible payment terms along with excellent delivery options without minimum order required. More great deals are available if you purchase your Rogers 4350b at Venture!
Venture has a supportive customer service team to assist you. We can guarantee you a hassle-free transaction and excellent after-sales service!
For your orders, contact us directly!
Rogers 4350B: The Ultimate FAQs Guide
This guide focuses on all the critical aspects of Rogers 4350B.
So, whether you want to learn about the specifications, uses, benefits or features, you will find all information right here.
Keep reading to learn more about Rogers 4350B.
- What is Rogers 4350B Laminate Material?
- Which are the Features of Rogers 4350B Material?
- What are the Benefits of High-frequency Rogers 4350B Material?
- Which are the Losses that Makeup Insertion Loss of High-Frequency Rogers 4350B Laminate?
- How does Rogers 4350B differ from PTFE-based Materials?
- What is the Difference Between Rogers RO4350 and Rogers 4350B?
- What are the Applications of Rogers 4350B Laminate?
- Which are the Recommended Copper Foil Type for Rogers 4350B?
- What is the Difference Between Rogers 4350B vs. FR-4 laminate?
- How should you Store Rogers 4350B?
- Which are some of the Key Rogers 4350B Circuit Processing Guidelines?
- How do you Specify Rogers 4350B Laminate Impedance Control?
- Does extended Exposure in Oxidative Condition Affect Performance of High-frequency Rogers 4350B Laminate?
- What is the Shelf Life of Rogers 4350B Laminate?
- How do you Determine Controlled Impedance in Rogers 4350B material?
- Which are the Quality Standards for Rogers 4350B Material?
- Is Rogers 4350B Flame Retardant?
- How do ED Copper Foil and Rolled Copper Foil Compare In Terms of Thermal Shock Resistance in Rogers 4350B laminate?
What is Rogers 4350B Laminate Material?
Rogers 4350B Laminates refer to proprietary woven glass strengthened ceramics/ hydrocarbon PCB materials.
They feature manufacturability of glass/epoxy and electrical performance almost that of woven glass/PTFE.
The materials maintain the low loss and offer tight dielectric constant (Dk) control while using a similar processing technique as conventional epoxy/glass.
The High-frequency Rogers PCB laminates do not need the special handling procedures or through-hole treatments necessary in PTFE based materials.
Therefore, Rogers 4350B price is lower than that of standard microwave laminates.
Moreover, being UL94 V-0 rated, applications of the Rogers substrates are in high power RF PCB designs and active devices.
Which are the Features of Rogers 4350B Material?
Here are the main properties of Rogers 4350B Laminate that distinguish it from types of Rogers materials:
- Consist of woven glass reinforced ceramics or hydrocarbon
- Dielectric constant of 3.48±0.05 at 10 GHz
- Dissipation factor (Df) of 0.0037 at 10 GHz
- Low Z-axis CTE at 32 ppm/°C
- Non-PTFE laminate material
What are the Benefits of High-frequency Rogers 4350B Material?
Let’s look at the main advantages of Rogers 4350B laminates, which include:
1) Low Dielectric Loss and Insertion Loss
Low dielectric loss permits the use of 4350B PCB core in various applications where higher working frequencies restrict standard PCB laminates use.
They have the lowest thermal coefficient of Dk amongst any type of PCB laminate material.
Moreover, the dielectric constant of Rogers 4350B is steady over a wide frequency range.
The use of Rogers LoPro copper foil in 4350B laminate significantly reduces insertion loss.
This qualifies it as an ideal Rogers substrate for broadband PCB applications.
2) Steady Electrical Properties against Frequency
The stability facilitates transmission lines with controlled impedance and repeatable filter design.
3) Excellent Dimensional Stability
The coefficient of thermal expansion (CTE) of Rogers 4350B laminate offers a number of advantages to your PCB designer.
This Rogers laminate type features similar CTE as that of copper, enabling it to display excellent dimensional stability.
Dimension stability is a crucial property in the construction of mixed dielectric multiple layer Rogers PCB.
4) Low Z-axis CTE
This feature of Rogers 4350B material reliable quality of plated thru-holes, even in extreme thermal shock PCB applications.
Having a glass transition greater than 280 degrees Celsius, the laminate’s expansion attributes remain steady throughout the circuit processing temperatures range.
5) Compatible with Standard Methods of FR-4 Processing
You can easily fabricate Rogers 4350B laminate into PCB applying traditional FR-4 processing methods.
This Rogers RO4350B price the most competitive among RO4000 series laminates.
6) CAF Resistant
Conductive anodic filament refers to failure mode in circuit boards that happens under high voltage gradients and high humidity.
Which are the Losses that Makeup Insertion Loss of High-Frequency Rogers 4350B Laminate?
The insertion loss of Rogers 4350B material refers to a total loss of its transmission line and is a total of various other losses.
It increases with increasing signal frequency.
Also known as a total loss, the following PCB substrate losses make up insertion loss:
· Leakage Loss
Leakage losses generally depend on the semiconductor grade laminates and are usually not a concern in high-frequency Rogers 4350B substrates.
These materials typically feature high volume resistance, an attribute that makes leakages losses less concern.
· Radiation Loss
Radiation loss represents the energy amount the Rogers material radiates off its transmission line or losses to the surrounding environment.
Radiation loss relies on the laminate design and certain designs are less or highly prone to this kind of PCB loss.
These losses are worse at signal launch regions as well as impedance transitions.
Thickness, dielectric constant (DK), and frequency dictate the degree of radiation losses in high-speed Rogers 4350B.
For a specific transmission line circuitry having radiation loss problems, high frequencies will elevate the loss much higher.
Similar circuitry but with a thinner 4350B substrate will have reduced radiation loss.
Moreover, the Dk of the laminate may alter radiation loss and materials featuring higher Dk will experience less loss.
Note that, the microstrip transmission line has high susceptibility to radiation loss.
· Dielectric Loss
Dielectric loss refers to the reduction (attenuation) of signal energy because of the Rogers substrate.
It is typically dependent on the dissipation factor (Df) of 4350B material.
In some instances, the addition of a solder mask or any supplementary dielectric additive may increase dielectric loss.
Generally, most high-frequency Rogers materials are low loss, having Df values lower than 0.005.
· Conductor Loss
Conductor loss has several variables and might be challenging to correctly consider.
For instance, skin depth is one of the contributing factor to conductor loss.
Skin depth describes the conductor amount utilized by electrical current.
The electrical current will utilize the whole wire cross-sectional area at DC, 0 Hz.
With increasing frequency, current will only utilize the wire outer skin.
Skin depth at high frequencies is normally much lower than 2 microns.
For instance, at 1 GHz, copper conductor skin depth is 2.08 microns and 0.66 microns at 10 GHz.
Here is the mathematical formula for calculating skin depth of Rogers laminate material:
Where the following symbols represent:
- Skin depth (d)
- Frequency (f)
- Permeability (μ)
- Conductivity (σ)
Permeability refers to property of Rogers laminate to modify magnetic fields, with most PCB dielectrics having permeability of open space.
There exist certain metals employed as Rogers 4350B substrate plated finish which feature higher permeability, thus reducing the skin depth.
Furthermore, you can observe from the above formula that the metal conductivity can affect skin depth.
When the metal has lower conductivity there will be an increase in the skin depth.
Another issue associated with conductor loss of Rogers RO4350B is conductor surface roughness.
There will be more losses if you have a rough conductor surface due to the longer propagation of the wave.
The losses occur due to parasitic inductance because of the surface inductance of electrical current flowing in partial loops within the metal profile.
Basically, if skin depth has almost similar dimension as a roughness profile of the copper surface, the roughness will substantially influence conductor losses.
High frequency 4350B
How does Rogers 4350B differ from PTFE-based Materials?
Different from PTFE-based high-frequency PCB materials, Rogers 4350B core do not need specialized via preparation procedures like sodium etch.
It is a hard, thermoset laminate capable of undergoing processing by automatic handling mechanisms and scrubbing apparatus utilized surface preparation of copper.
Being ceramics/hydrocarbon-based, 4350B laminates are more rigid than those formed using PTFE.
Most PTFE-based Rogers materials incorporate ceramic or glass filler to offer rigidity and strength to the plastic substrate material.
In comparison to thermoset resin Rogers 4350B, PTFE/glass fabric laminate can attain tighter thickness tolerances throughout a material sheet.
ensures exceptional dissipation factor and dielectric constant consistency across the PCB laminate.
Tight control of material thickness helps in attaining controlled-impedance transmission lines, a crucial aspect in high-frequency circuits.
What is the Difference Between Rogers RO4350 and Rogers 4350B?
Rogers 4350B design makes it a drop-in substitute to Rogers RO4350.
The primary difference between RO4350 vs. RO4350B is that Rogers 4350B has flame retardant features.
What are the Applications of Rogers 4350B Laminate?
The common uses of Rogers 4350B include integration in the following systems and equipment:
- Test and Measurement Equipment
- Small Cells/DAS
- Power Amplifiers
- IP Infrastructure
- Communications Systems
- Backhaul Radios
- Computing Devices
Which are the Recommended Copper Foil Type for Rogers 4350B?
Copper foils designs for high frequency Rogers substrates enable them to offer optimal performance in extreme reliability PCB applications.
There exist different copper foil types in various thicknesses/weights.
The characteristic of the copper foils differ.
Therefore, it is important to understand these differences to guarantee the right choice for every use or environmental condition.
Here are the two main types of copper foil used in Rogers 4350B laminates:
Rogers PCB material
· Electrodeposited Copper
Manufacturing of ED copper foil involves the deposition of copper ions through electrolysis onto spinning metallic mandrel to create a thin foil layer.
The process manufactures thin foils of high purity suitable to use in high-frequency applications.
ED copper undergoes several treatments that improve adhesion between dielectric interlayers and copper during the process of copper-clad lamination.
Moreover, the treatments act as anti-tarnish agents hence slowing down copper oxidation.
· LoPro Foil
In this type of copper foil for Rogers 4350B materials, you apply a thin adhesive layer on the reverse treated surface of the copper.
It also integrates a physical layer of adhesion enhancement material.
Similar to reverse treated ED copper, there is the bonding between the dielectric layer and adhesive treated surface for superior adhesion.
What is the Difference Between Rogers 4350B vs. FR-4 laminate?
Let’s look at the key difference between Rogers 4350B substrates and FR-4 substrates:
FR 4 Laminate
· Better Performance
Rogers 4350B laminates have better performance compared to ordinary FR-4 PCB materials.
Yet, the two substrate materials keep similar costs of processing and assembling.
There is a significant difference in terms of the cost of Rogers 4350B and FR-4 laminate.
The price of FR-4 material is relatively lower in comparison to 4350B laminate.
· High Frequencies
Though favored for their low cost and reliable mechanical and electrical properties, FR-4 is not suitable for high-frequency laminate applications.
Rogers materials are the most popular high-frequency PCB laminates.
They exhibit an approximately 20 percent reduction in Dk in comparison to circuit boards fabricated using FR-4 materials.
· Dissipation Factor (Df)
FR-4 materials feature a high dissipation factor in comparison to Rogers 4350B, specifically at high frequencies.
There Df increases with rising frequency, while high frequency 4350B laminates exhibit stable Df with frequency.
The low dissipation factor of Rogers laminates is instrumental in minimizing signal losses.
Further, their automated processing and assembly compatibility makes construction very easy to fabricate.
· Impedance Stability
Stable impedance is crucial for most high-frequency applications and is an aspect where Rogers laminates and FR-4 types differ largely.
FR-4 substrates are prone to wide dielectric constant variations across their length and width with changes in temperature.
On the other hand, Rogers substrates have a more extensive dielectric constant range.
Generally, Rogers 4350B laminate has higher dimensional stability compared to FR-4 laminates.
Therefore, the ideal choice is high-frequency laminate if you need a PCB with minimal variations throughout wide temperature changes.
You should choose a high-frequency Rogers 4350B substrate when most of your applications involve operating in high-temperature conditions.
· Thermal Management
Thermoset-based PCB materials like 4350B laminates are greatly robust than FR-4 laminates and are popular for their exceptional high temperatures handling.
With respect to thermal management, this type of Rogers material functions better due to its less variations than FR-4 laminates.
How should you Store Rogers 4350B?
You should store fully clad 4350B laminates at room temperature, between 10 to 32 degrees Celsius.
It is advisable to apply first-in-first-out inventory approach and a technique of material lot numbers tracking throughout processing and finished PCBs delivery.
Which are some of the Key Rogers 4350B Circuit Processing Guidelines?
These guidelines offer basic information on processing of dual-sided or multi-layered PCB using 4350B laminates:
1) Inner Layer Preparation
Rogers 4350B laminates are adaptable with most pinless and pinned tooling systems.
Your preferences and final registration specifications and capabilities of PCB manufacturer will determine whether to apply:
- Slotted or round pins
- Multiline or standard tooling
- Internal or external pinning
- Pre-etch or post-etch punching
Typically, post-etch punching, multiline tooling, and slotted pins will satisfy most requirements.
· Preparation of Surface for Photo Imaging and Copper Etching
Based on Rogers 4350B core thickness, you can prepare the copper surface for photoresist processing employing mechanical or chemical procedures.
You should prepare thinner cores utilizing a chemical procedure, including washing, micro-etching, rinsing of water, and drying operations.
Thicker 4350B materials are consistent with mechanical scouring systems.
Moreover, Rogers 4350B laminates are feasible with the majority of dry and liquid film photo-resists.
After patterning, you can process them applying to develop, etch and strip (DES) procedures used in FR-4 materials processing.
· Oxide Treatment
It is possible to process Rogers 4350B cores using whichever copper oxide or oxide optional process in multilayer bonding preparation.
However, the best treatment option is usually the one suggested in guidelines backing the selected adhesive or prepreg system.
· Multi-Layer Bonding
Rogers 4350B substrates are compatible with a number of thermoplastic and thermosetting adhesive systems.
However, you should check the adhesive system guidelines for bond cycle specifications.
You can use standard entry (thin pressed phenolic or aluminum) and exit (fiberboard or pressed phenolic) materials when drilling 4350B cores.
This type of Rogers laminate is compatible with a wide variety of drilling parameters.
Nevertheless, it is necessary to avoid drilling speeds above 500 surface feet/minute (SFM).
For large and mid-range diameter tools, chip loads should be above 0.002”.
Conversely, it is advisable to apply lower shiploads for small diameter (<0.0135”) drills.
Generally, it is preferable to apply conventional geometry drills over undercut styles, since they more efficiently eliminate debris from holes when drilling.
You should base hit counts on plated thru-hole inspection and not the tool’s appearance.
Drilling of Rogers 4350B materials will lead to the accelerated rate of drills wear.
However, you determine the quality of the hole wall by ceramic powder size distribution and not through the drill bit cutting edge.
Expect hole wall roughness spanning from 8-25 mm and needs to remain constant from the first hit to several thousand hits.
Here is a summary of suggested drill parameters:
1) PTH Processing
· Surface Preparation
You can process thick two-sided and multilayer constructions using conveyorized debur systems that employ oscillating nylon brushes for abrading copper surfaces.
However, thinner layers might need pumice scouring by hand, chemical preparation, conveyorized processing using an abrasive spray.
Generally, consider the thickness of Rogers 4350B laminate and registration requirements when selecting the best deburring and surface preparation method.
Desmearing of drilled holes is often not necessary in double-sided Rogers PCB, since high Tg of resin system reduces smear occurrence.
Multiple layer Rogers 4350B circuit boards might need desmear based on the requirements of prepreg or bond ply layers.
When desmear is necessary, you can use CF4/O2 plasma process or one or double pass via alkaline permanganate.
It is not advisable to etchback 4350B laminate layers.
This might lead to vigorous etchback of resin close to copper layers and unbinding of hole wall filler particles.
· Metal Deposition
Rogers 4350B laminates do not need special treatments before metallization.
In addition, they are feasible with direct deposition of colloidal and ionic conductive layers and electroless copper processing.
For circuit boards featuring PTHs with a high aspect ratio, you can consider copper flash plate (0.00025”).
2) Copper Plating and Outer-layer Processing
Rogers 4350B substrates are compatible with pattern and panel processing utilizing standard electrolytic tin, tin/lead or acid copper plating.
After plating, you can process the laminate applying any conventional strip/etch/strip (SES) procedure.
Ensure to preserve the post-etch surface of the Rogers PCB material.
This will guarantee perfect bonding with photo-imageable and directly screened solder masks.
Final Metal Finishes
Rogers 4350B laminates are consistent with hot air solder levelling (HASL), organic solderability preservatives (OSPs) and most electrodeposited or chemically deposited finishes.
3) Final Circuitization
“Individualization” of PCB manufactured using high-frequency Rogers 4350B laminates can be through punching, shearing, dicing, routing or sawing.
You can use breakaway tabs and V-scoring to enable circuit board individualization after automated assembly.
Here are some suggestions for routing:
Use carbide tools and settings typical to conventional epoxy/glass PCB materials processing.
To avoid burring, make sure you etch away copper from the routing path.
· Maximum Stack Height
Base the maximal stack height on 70 percent of real flute length to facilitate debris removal.
· Tool Type
Use diamond cut router bits or carbide multi-fluted chip breakers in routing of Rogers 4350B laminate.
· Routing Conditions
Whenever practical, you should apply surface speeds under 500 SFM to extend tool life.
The tool life is typically above 30 linear feet if routing the maximal acceptable stack height.
How do you Specify Rogers 4350B Laminate Impedance Control?
During specification of high frequency Rogers laminate impedance, typically you should state values for the following parameters:
- Trace width
- Target impedance
- Layer of Rogers 4350B substrate the impedance trace are locate
- Trace height
- Space separating copper elements on controlled traces (helps in differential or coplanar calculations)
You might include a chart laying out trace widths, impedance targets, layer thicknesses, and copper weights if you have extremely specific requirements.
Including the chart can assist in clearing up uncertainty by offering a visual presentation of provided specifications.
These are just a couple of variables, and some of the information might already be in the Rogers 4350B documentation.
Therefore, in certain instances, there is minimal work when specifying impedance control.
Does extended Exposure in Oxidative Condition Affect Performance of High-frequency Rogers 4350B Laminate?
Prolonged exposure within an oxidative condition might lead to alterations in dielectric features of hydrocarbon-based Rogers laminates.
The rate of alteration increases elevated temperatures and relies greatly on the design of 4350B PCB.
However, performance issues due to oxidation are exceedingly rare with high-frequency Rogers laminates.
Still, it is advisable to analyze Rogers 4350B laminate and design composition to establish suitability for use throughout the finished product’s entire life.
What is the Shelf Life of Rogers 4350B Laminate?
You can store high-frequency Rogers 4350B laminates for prolonged periods under room humidity levels and temperature (13-32 degrees Celsius).
The dielectric materials remain inactive to high humidity at room temperature.
Nevertheless, high humidity exposure can oxidize metal claddings like copper.
But, you can eliminate the oxidation on copper using a traditional micro-etch process.
Moreover, the unmasked dielectric along Rogers 4350B panel might experience recognizable oxidation levels over a prolonged duration (greater than 5 years).
Making up for ordinary tooling trim and hole loss, such oxidation levels of the trace cannot stretch into a used section of laminate.
However, you should remember that every application differs.
Therefore, it is not a given that Rogers 4350B materials are suitable for any specific end-use.
For that matter, it is advisable to test the performance and properties of the Rogers laminate in each intended application.
This is instrumental in establishing its suitability for use throughout the entire life of 4350B material.
How do you Determine Controlled Impedance in Rogers 4350B material?
The parameter that determines the characteristic impedance of high-frequency Rogers 4350B trace is its capacitive and inductive resistance, conductance, and reactance.
These variables depend on the trace physical dimensions, the dielectric constant of 4350B substrate, and dielectric thickness.
Generally, trace impedance of Rogers 4350B laminate span from 25-125 Ohms.
The following factors will dictate the impedance figure generated by the PCB material.
- Thickness and width of copper signal trace (bottom and top)
- Thickness of prepreg or core material on both surfaces of copper trace
- Dielectric constant of Rogers 4350B core and prepreg laminate
- Distance from additional copper features
Which are the Quality Standards for Rogers 4350B Material?
Here are the essential safety and quality standards that the Rogers 4350B laminate should comply with;
- REACH Standard
- CE Standard
- IPC Standard
- ISO Standard
- UL Standard
Is Rogers 4350B Flame Retardant?
Yes, 4350B laminates employ flame retardant technology which complies with RoHS specifications.
This makes them fit for Rogers PCB applications that need UL 94V-0 certification.
How do ED Copper Foil and Rolled Copper Foil Compare In Terms of Thermal Shock Resistance in Rogers 4350B laminate?
Rogers PCB material
Under certain severe conditions of quick thermal cycling, ED copper might display thermal stress cracks within narrow conductors.
On the other hand, under the same settings, rolled copper exhibits enhanced resistance to cracking.
Furthermore, electrodeposited copper features greater tensile elongation and strength prior to breaking.
But, rolled copper has superior tensile elongation prior to reaching irreversible deformation.
With the information in this guide, you can certainly choose high-performance Rogers 4350B material.
In case you have any questions or inquiries about Rogers 4350B material, contact the Venture Electronics team now.