ROGERS PCB introduction

ROGERS PCB introduction

1.ROGERS PCB APPLICATIONS

Rogers is mostly used in RF microwaves, high-speed designs, military, automotive industries, and mobile apps. Rogers PCB uses dielectric material, which insulates the regular FR-4 based printed circuit boards.

2.Rogers PCB Thermal Expansion Coefficient

It is common knowledge that things expand when they heat up. In the same way, PCB materials also develop when you subject them to high temperatures. In general, there is a threshold temperature, also called a glass transition temperature, which determines when the expansion starts. The PCB materials will expand when they exceed the set threshold.So, the coefficient of thermal expansion (CTE) determines how the PCB materials expand after this temperature. Its unit is parts per million (ppm). Rogers 4000 material’s CTE provides circuit designers with many benefits. It is almost equal to copper (in the X and Y direction), allowing the content to show remarkable dimensional stability. This property is critical for the construction of dielectric multilayer circuit boards and temperature-sensitive applications.

Rogers’s material reduces stresses that can cause the warpage of the PCB. They have a glass transition temperature of more than 280°C. Therefore, if you are looking for such CTE characteristics, you may go for Rogers 4000 material series.

3.Rogers PCB Dielectric Constant

Electronic projects with high-frequency components require a stable dielectric constant. By definition, the dielectric constant is the charge quantity that is stored in a material. The PCB material with a high dielectric constant has more voltage and higher capacitance. Rogers’s articles have a stable dielectric constant for a wide frequency range. Thus, it is perfect for broadband applications.

Rogers’s PCB dielectric constant also has a very low temperature coefficient, making it supreme for temperature-sensitive projects. To be specific, Rogers 4350b exhibits a dielectric constant of 3.66. What does this mean? It makes it perfect for point-to-point links in microwave-based projects.

4.Rogers PCB is Hygroscopic

A PCB material should not adsorb moisture from water or air under ideal conditions. But this is not at all practical. Every element is hygroscopic, and so is Rogers PCB.

Many modern PCB materials have a moisture absorption rate lying between 0.01% and 0.2%. Therefore, Rogers PCB must absorb minimum moisture.

Fortunately, Rogers PCB already has minimum moisture absorption. This allows them to have better electrical and thermal characteristics. Thus, you can use them for almost every kind of condition and environment. Moreover, Rogers PCBs have lower chances of malfunctioning. The typical value of Rogers 4350b is 0.06.

5. Rogers PCB Temperature Problem

Your project domain decides the max and min bearing temperature of a PCB material. If your electronics project is sensitive to high temperatures, you should go for designs with appropriate Rogers PCB. It should have a reversal mechanism if in case the temperature surpasses the safe limit.

If Rogers PCB temperature problem is ignored, the PCB would likely decay and lose a fraction of its mass. Many applications have an ideal safe temperature limit of up to 350 degrees Celsius. Therefore, you should choose rogers material, which has a decomposition temperature of more than this.

6. Driver Circuit Design Requires Stable Impedance

Driver circuit designs mostly need stable impedance. It is well known that Rogers's material offers a wide range of dielectric constant than the standard FR-4 equipment. Thus, it doesn’t compromise on the performance of such circuit designs by keeping their impedance stable.

Many high-frequency circuits usually work with a characteristic impedance of 50 Ω, and they must match it with other circuit components. This ensures that power transfer is maximum between source and load. Also, the circuits will not get many standing waves and suffer from fewer reflections.

Many contemporary computer-aided-engineering (CAE) software tools allow you to select many parameters of Rogers PCB material. You can define a dielectric constant, using such tools, which ensures impedance matching and stability.

7. Some Practical Applications of Rogers PCB

• Large batch, lower cost

Roger PCB high-frequency laminates have lower cost and allow large batches of PCB materials. It is widespread in automotive radar sensors. Its hybrid PCB uses materials mixture with many layers of flame-retardant FR-4 material. It is also with a high glass transition temperature (Tg). Further, there is even one layer of PCB material that has all the properties required for high-frequency use.

This mixture of PCB materials helps in maintaining reliability, controlling costs, and meeting high electrical performance. The automotive radar sensors have specific performance requirements at 77 GHz frequency. Thus, Rogers material is widely used as the outer layer of high-frequency circuit material. It has all the properties for high performance at millimeter-wave and microwave frequencies.

• Small size and high performance

In electronics, power amplifier design is crucial. The PCB material for an amplifier design must have all the characteristics that would guarantee high amplifier performance. The Rogers PCB is widely in use for high-power amplifiers. They have the right coefficient of thermal expansion, as already discussed, and thermal conductivity.

In the high-power amplifier, you must direct the heat away from the transistors to ensure high performance. Moreover, it would also ensure a long life of such speakers. By definition, the thermal conductivity is “the watts of power per meter of laminate material per degree Kelvin.” Therefore, Rogers PCB would be an ideal PCB material. Rogers 4360b laminate material has a thermal conductivity of 0.62 W/m/K, and Rogers 4360 laminate has a thermal conductivity of 0.8 W/m/K. The laminate with higher thermal conductivity would be able to handle the power better.

8. Understand the Physical Parameters of Rogers PCB

Apart from the parameters discussed above, the hole quality is very crucial when selecting a PCB material. The Roger 4350 material will provide you with good hole quality. But it would help if you made sure that the drills are made according to the glass/epoxy standards. In comparison to glass/epoxy, the irregularity of holes will not increase with usage. It offers a wide range of drilling parameters. Still, you should not exceed the drilling speed of 500 surface feet per minute (SFM).

Metal deposition is another important physical parameter of Rogers PCB. Rogers 4835 and 4835b support the electroless copper processing in addition to no specific preparations before metallization. You would also be able to deposit the colloidal and ionic conductive layers directly.

Summary:

So, these are the eight technical tips that you should take before start designing the Rogers PCB. Rogers PCB is capable of providing you with better thermal management, improved impedance control, low-cost circuit fabrication, low moisture absorption, low outgassing.All you need to do is to keep in mind the above-discussed technical tips. If you need to make Rogers PCB, you can contact us; OurPCB can provide technology, materials, and quality services. Hurry up and order now. What are you waiting for?

• Rogers 4350B

The Rogers 4350B has a low loss capability and stable control on its dielectric constant (DK), makes its materials ideal for high power RF designs and super-active appliances.

• Rogers 3003

This Rogers PCB model is suitable for automotive radar applications with 77 GHz, and it also supports 5G wireless applications and ADAS.

• Rogers 3006

The 3006 model offers excellent mechanical and electrical stabilitywith a reliable dielectric constant across various temperatures. And it removes the step change in the Dk.

• Rogers 3010

The 3010 is one of the most affordable models with advanced ceramic-filled PTFE materials. Hence, its stability streamlines the broadband components.

• Rogers 0588

Reinforced with glass microfibers, the Rogers 5880 has a low DK and loss feature. Hence, it makes the model highly suitable for broadband and high-frequency applications.

• Rogers 6002

The 6002 model comes with low DK materials that are ideal for sophisticated microwave structures. Hence, its ideal for multi-layer board designs.

• Rogers 6010

This RO6010 is ideal for microwave and electronic board applications that require a high DK. Also, the model is idealif you plan on dealing with circuit size reduction.

• Rogers 4003

The Rogers 4003 model uses 1674 and 1080 glass fabric styles. All its configurations have the same specifications; they dont support bromination.

• Rogers 4835

This 4835 laminate is a low-loss material that provides high stability at significant oxidation resistance and increased temperatures. With it, youll get a standard glass or epoxy FR-4 processes and cheap circuit production.

• Rogers 4360G2

This laminate offers a perfect balance of processing capability and performance. Plus, the low-loss laminate consists of hydrocarbon ceramic-filled thermostat materials.

9.A general recommendations about the Rogers material based on the application.

Cunsumer Electronics

RF Material recommend:RO3006,RO3010,RO4835
Bonding Materials recommend:RO3000 series bondply,2929 Bondply
Attributes:Cost effective with dependable electrical and thermal characteristics

Military/Space

RF Material recommend:RT/Duroid series,RO4000 series.
Bonding Materials recommend:RO4450B,RO4450F
Attributes:The best in electrical and thermal performance and environmental durability

High Power Applicaitons

RF Material recommend:6035HTC,XT/Duroid series
Bonding Materials recommend:
Attributes:Superior thermal management

Medical

RF Material recommend:RO4350B
Bonding Materials recommend:RO4400 Bondply,2929 Bondply
Attributes:Versatile high performance properties to suit a range of device types

Automotive

RF Material recommend:RO3003,RO4000,RO4350B
Bonding Materials recommend:RO4400 Bondply
Attributes:Excellent electrical performance compatible with standard manufacturing processeses

Industrial

RF Material recommend:RO4835,RO4350B,XT/Duroid
Bonding Materials recommend:2929 Bondply,RO4400 Bondply
Attributes:Excellent durability and environmental resistances,including oxidation