The RO4000 family brings together hydrocarbon ceramic circuit laminates and associated multilayer materials. Use the family as a starting point when RF performance must be balanced with a manufacturing route closer to familiar thermoset PCB processing.

Separate core, foil and antenna decisions

RO4003C and RO4350B are useful starting candidates for general RF circuitry. Antenna-oriented grades and radar-oriented constructions address different design priorities. A LoPro construction also changes the copper interface; it is not simply a label that can be added after the stackup is finished.

Make the shortlist specific

First identify flame-performance requirements and the exact recognized construction where relevant. Next select a practical dielectric thickness and available foil. Recalculate impedance and phase with the appropriate design Dk, including any thickness-specific notes. For a long antenna feed, study conductor loss and PIM alongside dielectric loss; for an inner RF layer, identify the bonding material that also occupies the electric field.

Before committing a multilayer build

Review the hybrid stackup with the fabricator and document finished dielectric spacing, copper treatment and lamination sequence. An outdoor unit with sustained heat should also consider the RO4350B and RO4835 comparison. Broad process compatibility does not establish the yield or qualification of an unfamiliar factory on your construction.

References in this family

materialRO4003C: Properties, Uses & Design NotesRO4003C is a glass-reinforced thermoset laminate for microwave interconnects, filters and matching networks where low dielectric loss and familiar PCB…materialRO4350B: Properties, Uses & Design NotesRO4350B combines the RO4000 thermoset processing approach with a flame-retardant formulation.materialRO4000 LoPro: Properties, Uses & Design NotesRO4000 LoPro identifies a smooth reverse-treated copper construction used with several RO4000 laminates, rather than one dielectric formulation with a…materialRO4360G2: Properties, Uses & Design NotesRO4360G2 is a higher-permittivity thermoset option for designers who want more compact distributed RF features while retaining the RO4000 processing route.materialRO4533: Properties, Uses & Design NotesRO4533 is an antenna-oriented thermoset laminate with a lower nominal process Dk than RO4534.materialRO4534: Properties, Uses & Design NotesRO4534 occupies a neighboring antenna-design point to RO4533, with a somewhat higher nominal dielectric constant and a distinct thickness offering.materialRO4535: Properties, Uses & Design NotesRO4535 appears in Rogers' selector as the flame-retardant member of the RO4500 antenna family.materialRO4725JXR: Properties, Uses & Design NotesRO4725JXR provides a relatively low dielectric constant within a thermoset antenna-material platform.materialRO4730G3: Properties, Uses & Design NotesRO4730G3 is a flame-retardant antenna laminate in the RO4700 group with a nominal process Dk around three.materialRO4830: Properties, Uses & Design NotesRO4830 is a spread-glass thermoset laminate documented in the selector for millimeter-wave work.materialRO4830 Plus: Properties, Uses & Design NotesRO4830 Plus is a woven-glass-free thermoset laminate intended for thin millimeter-wave RF layers.materialRO4835: Properties, Uses & Design NotesRO4835 is a hydrocarbon thermoset laminate developed with improved resistance to oxidative aging.materialRO4835T: Properties, Uses & Design NotesRO4835T extends the RO4835 concept into thin spread-glass constructions for multilayer RF designs.materialRO4835IND LoPro: Properties, Uses & Design NotesRO4835IND LoPro is a specific thin thermoset construction for short-range industrial radar in the 60–81 GHz region.

Choose the grade, copper and bonding construction together; the family name is not a complete board specification.

Technical sources

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