What Makes the Rogers 5880 a Reliable PCB substrate for RF Application

This is a guide covering all you need to know about the Rogers 5880. Rogers 5880 comes with features such as a better chemical performance. Also, it is designed with a low moisture absorption. This ensures that users of the Rogers 5880 get the performance they desire. Due to its great and advanced features, you can use the Rogers 5880 in different applications.

The dissipation factor of the Rogers 5880 is also low. It also comes with a dielectric constant that is uniform over a wide range of frequency. The manufacturing of the Rogers 5880 comes with added features.

Rogers 5880: Features and Product Specifications

The Rogers 5880 is isotropic and absorbs low moisture. Also, when comparing with other PTFE laminates (reinforced), the electrical loss of the material is lowest. Asides from this, it has a uniform dielectric constant. You can also work with it easily and resists solvents and reagents utilized in plating edges and holes excellently.

rt duroid substrate

The Rogers 5880 comes with these specifications.

  • Dielectric constant value of 2.2
  • Dielectric constant’s thermal coefficient at a temperature of -50 degrees Celsius and 150 degrees Celsius stands at -125 ppm per degrees centigrade.
  • Its heat capacity is 0.96 Jg/k
  • The material can only absorb 0.02 percent of moisture
  • Its thermal conductivity is 0.20 W/m/K and at a temperature of 80 degrees Celsius on the Z-axis.
  • Along the X axis, the CTE is 31 ppm/°C. Along the Y axis, it is 48 ppm/°C. On the Z-axis, it is 237 ppm/°C.
  • The temperature decomposition of the material is 500°C
  • It has a density of 2.2 gm/cm3Also, this laminate works with processing techniques that are lead free and possess the flammability rating V-0.

Rogers RT/duroid 5880 Laminate

The Rogers RT/duroid 5880 laminate are high-frequency laminates. You can do the fabrication making use of PTFE, with reinforcements using random fiberglass or ceramics.

You can use these laminates best for aerospace and defense applications. These applications must also require greater performance and high reliability materials.

The Rogers RT/duroid 5880 laminate also possesses very low absorption of moisture, low outgassing, and electrical loss is also low. Also, over a wide frequency range, the dielectric constant of the Rogers RT/duroid 5880 laminate is very stable.

RT Duroid 5880 Fabrication

Rogers Corporation has given some fabrication guidelines to follow when working with the Rogers 5880 material. This holds for both double-sided and single-sided construction of PCB.

Preparation of the Surface

It is important to engage in surface preparation of the Rogers 5880 laminate. This should be done before drilling (for the double-side construction) and then before the end cleaning when dealing with single-side construction.

Cover your hands with nylon gloves and then take out adhesive residues and polythene sheets. To remove any adhesive residue, all you should do is wipe the surface of the laminate using an alcohol-soaked cloth. After that, you rinse it with water.

To get rid of copper oxides, use commercial cleaners or micro etchants. Don’t work with mechanical methods for surface cleaning like abrasive cleaning. This could cause the copper to have micro-scratches.

Also, follow the standard procedures when punching, drilling, and rout tooling holes.

Prevent Smear

For laminates like rt duroid 5880, smearing could become a problem. Therefore, utilize the tool life, and then work with controlled and tight parameters for drilling. This avoids smear that you cannot remove.

However, another technique you can use is vapor honing. This dislodges any debris re-deposited.

Stack Construction

Utilize boards that are phenolic composite, which are already pressed as an exit or entry material whenever you are drilling the rt duroid 5880 laminates, whether you are doing this in stacks or individually.

The greatest stack height to work with must be less than 0.240 inches. The total thickness of both the exit/entry material and core material must be less than three-quarter of the drill’s flute length.

Type of Drilling

To help in reducing cutting edge wear, also make use of carbide drills. Also, you may use the standard style for the drills, which usually have a lip angle of 130 degrees.

To reduce any re-deposited spear, make use of undercut drills, with its flute diameter reduced by 0.025” from your cutting end. To get the best results, ensure you make use of new drills.

Parameters for drilling

The optimal speed for the tool surface should fall within the range of 150 – 250 SFM. Also the optimal rate for infeed should be in the range of 0.0015” – 0.0025” for every revolution.

The retraction rate should fall within 400 and 500 IPM. Also, change the bits of the drill every 12 inches of drilling of the dielectric material.

Deburring

Make use of rigid, flat, exit, and entry materials having conservative parameters for drilling. This will reduce any possible copper deburring risk.

Also, always choose chemical preparations. However, if you decide to utilize hand pumice or mechanical scrubbing, make use of minimal force. This helps in avoiding any distortion coming to the rt duroid 5880 laminate.

Preparation of the Hole

Make use of vapor or hydro honing technique whenever you want to get rid of deposited debris present in the hole. Make sure you give enough support. This is because the rt duroid 5880 material can damage easily due to its softness.

Treat the rt duroid 5880 laminate making use of either sodium or plasma treatment. Do this before you deposit a conductive layer. This is to prevent low metal adhesion and plating voids.

The sodium treatment offers better results for the Rogers 5880. Also, it will wet the surface of the material efficiently before you deposit the metal. If not, only work with plasma treatment that can work with direct metallization rather than using electrodeposited copper.

Once you have completed the surface treatment, use any of the electroless copper processes to deposit your seed layer.

Photoresist Application

Preferably, make use of chemical methods of preparation. This includes cleaners and microtech, then add the photoresists but adhering to standard processes set.

Electroplating

Handle the panels carefully. Consider making use of conventional techniques for electroplating.

Resist the Strip

Make use of standard etchants and strip solutions. Make sure that you offer more than enough support for the thin cores. This should be done through conveyorized processes.

Application of the Soldermask

You can utilize standard solder masks that are photo imageable. This is because they offer enough adhesion. In other words, make use of solder masks (epoxy-based), if you want it to be silver screened.

Final Circuitization

Here, you can punch, score, or rout the rt duroid 5880 laminate using different ways. Thus depends on the edge quality you prefer.

Factors to Consider when Using Rogers duroid 5880 Laminate to Fabricate Multilayer PCB

rt duroid 5880

There are some factors to consider when using Rogers duroid 5880 laminate to fabricate multilayer printed circuit boards.

Inner Layers Preparation

Make use of photoresist procedure and conventional etch. Also, ensure you’re maintaining a dielectric surface that is as-etched. This avoids the need to use sodium treatment to treat the surface.

The adhesive system influences the treatment you should use on a copper surface.

Adhesive Systems

It is advisable to either use thermoplastics or thermoset adhesive systems to bond the Rogers duroid 5880 multilayer circuit board.

Utilize a thermoplastic system anytime the electrical properties of your circuit board are critical. Also, make use of any thermoset system whenever your PCB’s electrical properties are not critical.

Processing the Post-Bond of the Circuit Board

You may utilize the guidelines for processing circuits that are double sided when processing the outer layer.

Rogers 5880 RT Duroid Substrate

RT duroid substrate is the PTFE composite. The dielectric substrates utilized are RO4003, FR-4, Taconic TLC, and RT Duroid

FR-4

This grade designation is given to epoxy laminate rods, tubes, sheets, and PCBs that are glass-reinforced. FR4 is the composite material made up of fiberglass cloth (woven), coupled with a self-extinguishing or flame-resistant binder (epoxy resin).

FR-4 is a versatile and well-known high-pressure laminate grade. Its ratio of its strength to its weight is also great. Its water absorption is close to zero, which makes it a great electrical insulator, and still boasts great mechanical strength.

RO4003

The RO4003 are glass reinforced laminates. This is designed for high volume and performance sensitive commercial applications. These laminates offer better high-frequency performance as well as circuit fabrication of low cost. This results in a low material that can be easily fabricated making use of standard FR4 processes and at low prices.

Taconic TLC

These substrates are designed to serve those with low cost plans. This is for the newly emerging RF/microwave commercial applications. The substrates of the Taconic TLC are manufactured in different thickness. The first has a thickness of 0.37 nm and with an Er of 2.70. The other has a thickness of 0.50 nm and an Er of 3.0 and the last with a thickness of 0.80 nm and an Er of 3.30 and 3.20.

These materials have great thermal and mechanical stability. Also, they are not as expensive as the PTFE substrates.

 RT Duroid

This is a PTFE composite that is glass reinforced. Its loss tangent is low. Their chemical resistance level is excellent. The process involved in fabrication is also easy. This process includes machining, shearing, and cutting. Also, it is environmentally friendly.

Comparing Rogers 5880 to FR 4

The material of Rogers 5880 is a high-frequency and superior laminate. This is useful in applications requiring high frequency, in contrast to FR-4 that offers the most appropriate results at much lower frequencies. Here, we will be discussing the differences and similarities between the material of Rogers 5880 and FR-4.

  • FR-4 possesses a higher Dk than Rogers 5880, with a value of 4.5 to Rogers 5880’s 2.2
  • The temperature for decomposition for both FR-4 and Rogers 5880 is 305 degrees centigrade and 500 degrees centigrade
  • The dielectric constant of the roger 5880 laminate is 5880 and goes across a very wide frequency range and also across different panels in contrast to the dielectric constant of FR-4.
  • The electrical loss of Rogers 5880 material is lower than that of FR-4
  • In terms of price, the FR-4 material is less expensive than the Rogers 5880 material
  • Both materials, FR-4 and rogers 5880 possesses the same UL 94 V-0 flammability rating
  • For moisture absorption, the value for FR-4 could fall between 0.15 and 0.25%.

Rogers 5880 Applications

The loss and dielectric constant of laminates of the Rogers 5880 are very low. This makes it useful in high-frequency or broadband applications.

The Rogers 5880 is also great for demanding stripline and microstrip circuit applications. As regards weight, the material is extremely light. Also, it possesses low density. This is as a result of its exceptional filler systems.

Therefore, they are useful in applications requiring high performance and those that are weight sensitive. These applications include:

  • Antenna systems, which are great for airborne machines, equipment, and devices
  • Missile guidance systems
  • Strip and microstrip circuits
  • Point-to-point antennas for digital radio
  • Radar systems for the military
  • Very lightweight feed networks
  • Telephone circuits with respect to commercial aviation

Rogers Rt Duroid 5880 Vs Rogers 4000 Laminates

The Rogers rt duroid material is glass microfiber reinforced PCB laminate. RO 4000 on the other hand is a ceramic or hydrocarbon material that is also glass reinforced.

Generally, the Rogers 4000 laminates are very easy to fabricate, without any need for any through-hole preparation with special plating like the Rogers 5880.

Considering the thermal and electrical properties of both, that of Rogers rt duroid 5880 is superior. Therefore, the Rogers rt duroid 5880 is quite better for applications that require serious electrical considerations in contrast to the RO4000.

Conclusion

We have done a comprehensive review on the Rogers 5880, as well as other related information. The Rogers rt duroid 5880 is great for applications such as missile guidance, military radar, radio antennas, microstrip circuits and more.

Utilizing advanced processes, RayMing PCB has what it takes to manufacture high-quality Rogers 5880. This will surely meet your projects, PCB needs, and requirements.