High frequency circuit boards

High frequency PCB with Rogers material

The increasing complexity of electronic components and switches continually requires faster signal flow rates, and thus higher transmission frequencies. Because of short pulse rise times in electronic components, it has also become necessary for high frequency (HF) technology to view conductor widths as an electronic component.

Depending on various parameters, HF signals are reflected on circuit board, meaning that the impedance (dynamic resistance) varies with respect to the sending component. To prevent such capacitive effects, all parameters must be exactly specified, and implemented with the highest level of process control.

Critical for the impedances in high frequency circuit boards are principally the conductor trace geometry, the layer buildup, and the dielectric constant (εr) of the materials used.

Multi-CB provides you with know-how, all popular materials and qualified manufacturing processes - reliably even for complex requirements.

Rogers 4350B: Quote & Order
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Design of HF circuit boards

Multi CB supports you starting immediately in the design phase. We help you to find appropriate substrates, dimensioning the conductor width and spacing, as well as with calculating the impedances.

Our offer for HF circuit boards:

  • HF-material (low-loss), e.g. PTFE substrate
  • Impedance controlled multilayers
  • Sandwich buildup / hybrid layer buildup for material combinations
  • Microvias strating from 75µm
  • Controlled production line / with comprehensive test certificate, as needed
  • Backdrill

Materials used for HF circuit boards

High-frequency boards, e.g. for wireless applications and data rates in the upper GHz range have  special demands on the material used:

  • Adapted permittivity
  • Low attenuation for efficient signal transmission
  • Homogeneous construction with low tolerances in insulation thickness and dielectric constant

For many applications, it is sufficient to use FR4 material with an appropriate layer buildup. In addition, we process high-frequency materials with improved dielectric properties. These have a very low loss factor, a low dielectric constant, and are primarily temperature and frequency independent.

Additional favourable properties are high glass transition temperature, an excellent thermal durability, and very low hydrophilic rate.

We use (among others) Rogers or PTFE materials (for example, Teflon from DuPont) for impedance controlled high frequency circuit boards. Sandwich buildups for material combinations are also possible.

Material for high frequency boardsPCB order shareOrder sharePCB dielectric constant?rPCB Dk Loss TangentDk Loss TangentPCB TgTgPCB Td valueTd valuePCB Thermal conductivityThermal conductivityPCB CTE-zCTE-zPCB electric strenghtElectric strenghtPCB surface resistivitySurface resistivityPCB peel strengthPeel strength
Material for high frequency boards PCB order shareOrder share PCB dielectric constant?r@10GHzPCB Dk Loss TangentDk Loss Tangent@10GHzPCB TgTg°CPCB Td valueTd value°CPCB Thermal conductivityThermal conductivityW/m*KPCB CTE-zCTE-zppm/°CPCB electric strenghtElectric strenghtkV/mmPCB surface resistivitySurface resistivityMOPCB peel strengthPeel strengthN/mm
Material for high frequency boardsRogers 4350B
HF material		PCB order shareOrder share+++PCB dielectric constant?r3,5PCB Dk Loss TangentDk Loss Tangent0,0037PCB TgTg280°PCB Td valueTd value390°PCB Thermal conductivityThermal conductivity0,69PCB CTE-zCTE-z32PCB electric strenghtElectric strenght31PCB surface resistivitySurface resistivity5,7 x 10^9PCB peel strengthPeel strength0,9
Material for high frequency boardsRogers 4003C
HF material		PCB order shareOrder share++PCB dielectric constant?r3,4PCB Dk Loss TangentDk Loss Tangent0,0027PCB TgTg280°PCB Td valueTd value425°PCB Thermal conductivityThermal conductivity0,71PCB CTE-zCTE-z46PCB electric strenghtElectric strenght31PCB surface resistivitySurface resistivity4,2 x 10^9PCB peel strengthPeel strength1,1
Material for high frequency boardsPanasonic Megtron6
HF material		PCB order shareOrder share+PCB dielectric constant?r3,6PCB Dk Loss TangentDk Loss Tangent0,004PCB TgTg185°PCB Td valueTd value410°PCB Thermal conductivityThermal conductivity-PCB CTE-zCTE-z45PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1 x 10^8PCB peel strengthPeel strength0,8
Material for high frequency boardsRogers RO3003
PTFE ceramic-filled		PCB order shareOrder share+PCB dielectric constant?r3PCB Dk Loss TangentDk Loss Tangent0,0013PCB TgTg-PCB Td valueTd value500°PCB Thermal conductivityThermal conductivity0,5PCB CTE-zCTE-z25PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1 x 10^7PCB peel strengthPeel strength2,2
Material for high frequency boardsRogers RO3006
PTFE ceramic-filled		PCB order shareOrder shareoPCB dielectric constant?r6,2PCB Dk Loss TangentDk Loss Tangent0,002PCB TgTg-PCB Td valueTd value500°PCB Thermal conductivityThermal conductivity0,79PCB CTE-zCTE-z24PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1 x 10^5PCB peel strengthPeel strength1,2
Material for high frequency boardsRogers RO3010
PTFE ceramic-filled		PCB order shareOrder shareoPCB dielectric constant?r10PCB Dk Loss TangentDk Loss Tangent0,0022PCB TgTg-PCB Td valueTd value500°PCB Thermal conductivityThermal conductivity0,95PCB CTE-zCTE-z16PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1 x 10^5PCB peel strengthPeel strength1,6
Material for high frequency boardsTaconic RF-35
Ceramic		PCB order shareOrder shareoPCB dielectric constant?r3,5*PCB Dk Loss TangentDk Loss Tangent0,0018*PCB TgTg315°PCB Td valueTd value-PCB Thermal conductivityThermal conductivity0,24PCB CTE-zCTE-z64PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1,5 x 10^8PCB peel strengthPeel strength1,8
Material for high frequency boardsTaconic TLX
PTFE		PCB order shareOrder shareoPCB dielectric constant?r2,5PCB Dk Loss TangentDk Loss Tangent0,0019PCB TgTg-PCB Td valueTd value-PCB Thermal conductivityThermal conductivity0,19PCB CTE-zCTE-z135PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1 x 10^7PCB peel strengthPeel strength2,1
Material for high frequency boardsRogers RO3001
Bonding Film for PTFE		PCB order shareOrder share-PCB dielectric constant?r2,3PCB Dk Loss TangentDk Loss Tangent0,003PCB TgTg160°PCB Td valueTd value-PCB Thermal conductivityThermal conductivity0,22PCB CTE-zCTE-z-PCB electric strenghtElectric strenght98PCB surface resistivitySurface resistivity1 x 10^9PCB peel strengthPeel strength2,1
Material for high frequency boardsTaconic TLC
PTFE		PCB order shareOrder share-PCB dielectric constant?r3,2PCB Dk Loss TangentDk Loss Tangent-PCB TgTg-PCB Td valueTd value-PCB Thermal conductivityThermal conductivity0,24PCB CTE-zCTE-z70PCB electric strenghtElectric strenght-PCB surface resistivitySurface resistivity1 x 10^7PCB peel strengthPeel strength2,1

Complete overview of available circuit board materials

Depending on the stock on hand, the materials listed may be replaced by technically equivalent or similar products. For critical tolerances, please discuss your requirements with our engineers.

Impedance Check

The impedance defined by the customer is tested by our CAM station engineers on manufacturability. Depending on the layer buildup, the PCB layout and the customer's requested impedances a calculation model is chosen. The result is any required modification of the layer builduo and the necessary adjustments to the relevant conductor geometries.

Please also refer to our pages for impedance control of printed circuit boards.

After the manufacture of high frequency circuit boards, the impedances are checked (with a precision of up to 5%), and the detailed results are recorded exactly in a test protocol.

Additional information