Today, we're delving into the world of Taconic's ORCER family and
exploring an exceptional organic-ceramic laminate known as RF-35.
RF-35 laminates belong to the PTFE-based family and are reinforced
with woven glass. This remarkable creation is the culmination of
Taconic's expertise in coated PTFE fiberglass and ceramic fill
technologies. RF-35 boasts a dielectric constant of 3.50 at 1.9
GHz, accompanied by a dissipation factor of 0.0018 at the same
frequency.
With a moisture absorption rate of a mere 0.02% at a thickness of
.060 inch, RF-35 showcases its impressive resistance to moisture.
Additionally, it exhibits a peel strength exceeding 8.0 lbs./linear
inch for 1/2 oz. copper and surpassing 10.0 lbs./linear inch for 1
oz. copper, as per the stringent IPC-TM 650 2.4.8 standard.
Moreover, this material demonstrates a dielectric breakdown of 41
kV, a volume resistivity measuring 1.26 x 10^9 Mohm/cm, and a
surface resistivity measuring 1.46 x 10^8 Mohm, as determined by
the exacting IPC-TM 650 2.5.6 and IPC-TM 650 2.5.17.1 measurements,
respectively.
RF-35 boasts an impressive arc resistance, exceeding 180 seconds
based on the IPC TM 650 2.5.1 standard. Its flexural strength
lengthwise is greater than 22,000 psi, while crosswise it surpasses
18,000 psi, as per ASTM D 790 testing. Tensile strength
measurements reveal 27,000 psi (or 187 N/mm^2) lengthwise and
21,000 psi (or 145 N/mm^2) crosswise, according to ASTM D 638
standards.
RF-35 exhibits exceptional dimensional stability, with a lengthwise
dimensional stability of 0.00004 in/in and a crosswise dimensional
stability of -0.00010 in/in, as measured by IPC-TM 650 2.4.39.
| Property | Test Method | Unit | Value | Unit | Value |
| Dielectric Constant @ 1.9 GHz | IPC-TM 650 2.5.5 | | 3.5 | | 3.5 |
| Dissipation Factor @ 1.9 GHz | IPC-TM 650 2.5.5 | | 0.0018 | | 0.0018 |
| Moisture Absorption (.060") | IPC-TM 650 2.6.2.1 | % | 0.02 | % | 0.02 |
| Peel Strength (1/2 oz. copper) | IPC-TM 650 2.4.8 | lbs./linear inch | >8.0 | N/mm | >1.5 |
| Peel Strength (1 oz. copper) | IPC-TM 650 2.4.8 | lbs./linear inch | >10.0 | N/mm | >1.8 |
| Dielectric Breakdown | IPC-TM 650 2.5.6 | kV | 41 | kV | 41 |
| Volume Resistivity | IPC-TM 650 2.5.17.1 | Mohm/cm | 1.26 x 109 | Mohm/cm | 1.26 x 109 |
| Surface Resistivity | IPC-TM 650 2.5.17.1 | Mohm | 1.46 x 108 | Mohm | 1.46 x 108 |
| Arc Resistance | IPC TM 650 2.5.1 | seconds | >180 | seconds | >180 |
| Flexural Strength Lengthwise | ASTM D 790 | psi | >22,000 | N/mm2 | >152 |
| Flexural Strength Crosswise | ASTM D 790 | psi | >18,000 | N/mm2 | >124 |
| Tensile Strength Lengthwise | ASTM D 638 | psi | 27,000 | N/mm2 | 187 |
| Tensile Strength Crosswise | ASTM D 638 | psi | 21,000 | N/mm2 | 145 |
| Dimensional Stability Lengthwise | IPC-TM 650 2.4.39 | in/in | 0.00004 | mm/mm | 0.00004 |
| Dimensional Stability Crosswise | IPC-TM 650 2.4.39 | in/in | -0.0001 | mm/mm | -0.0001 |
| Tg | TMA | °C | >315 | °F | >600 |
| Thermal Conductivity | ASTM F 433 | W/m/K | 0.24 | W/m/K | 0.24 |
| X-Y CTE | ASTM D 3386 (TMA) | ppm/°C | 19-24 | ppm/°C | 19-24 |
| Z CTE | ASTM D 3386 (TMA) | ppm/°C | 64 | ppm/°C | 64 |
| Flammability | UL-94 | | V-0 | | V-0 |
| Hardness | Rockwell M Scale | | 34 | | 34 |
High Tg materials are a specialty of RF-35, with a remarkable value
exceeding 315°C.
When it comes to thermal conductivity, RF-35 showcases a figure of
0.24 W/m/K, as determined by ASTM F 433. Its X-Y CTE ranges from
19-24 ppm/°C, while its Z CTE measures 64 ppm/°C, based on ASTM D
3386 (TMA) standards. Additionally, RF-35 holds a V-0 rating for
flammability, confirmed by UL-94, and registers a hardness of 34%
on the Rockwell M scale.
We offer various options for PCBs, including single layer, double
layer, multi-layer, and hybrid configurations. Standard dielectric
thicknesses of 10 mils, 20 mils, 30 mils, and 60 mils are readily
available. Finished copper thickness options include 1oz and 2oz.
Our capabilities extend to PCBs with a maximum size of 400 mm by
500 mm. These can be individual boards or panels with multiple
alternative designs.
We provide a range of solder mask colors, such as green, black,
blue, and yellow. We also offer diverse choices for plating pads,
including immersion gold, HASL, immersion silver, immersion tin,
OSP, pure gold, and bare copper, among others.
| PCB material: | PTFE Ceramic Fiberglass |
| Designation: | RF-35 |
| Dielectric constant: | 3.5 |
| Dissipation factor | 0.0018 |
| Layer count: | Single layer, Double layer, Multilayer, Hybrid PCB |
| Copper weight: | 1oz (35µm), 2oz (70µm) |
| Laminate thickness: | 10mil (0.254mm), 20mil (0.508mm), 30mil (0.762mm), 60mil (1.524mm) |
| PCB size: | ≤400mm X 500mm |
| Solder mask: | Green, Black, Blue, Red, Yellow etc. |
| Surface finish: | Immersion gold, HASL, Immersion silver, Immersion tin, OSP, Pure
gold, Bare copper, ENEPIG etc.. |
Machining PTFE-based substrates presents unique challenges due to
the softness of the PTFE resin system. The quality of routing,
including the presence of burrs and fibers, is influenced by the
type of fiberglass used in the substrate. Heavier fiberglass weaves
pose greater difficulties in cutting.
RF-35 employs a robust heavy weight 7628 glass style, which
provides excellent dimensional stability and rigidity. However,
it's important to note that drilling or routing this product may
present more challenges compared to using a medium weight glass
style.
