RAYPCB / RF MATERIALS & FABRICATION
Taconic RF-35 PCB Incoming Inspection & Acceptance
Commercial RF fabrication with a documented original grade. Prepare an exact material callout, process questions and acceptance requirements before releasing fabrication files.
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What to specify for RF-35
Taconic RF-35 is covered here as a historical or specialty material designation. The historical reference values here are measured at 1.9 GHz. Do not call them a 10 GHz or mmWave design model.
| Field | Specification context |
|---|---|
| Material identity | RF-35 |
| Reference Dk | 3.5 |
| Reference Df | 0.0018 |
| Test context | Archived guide: Dk/Df 1.9 GHz, modified stripline 2.5.5.5.1 |
| Thermal conductivity | 0.32 W/m·K; see specimen/test condition |
| Supply status | Confirm current grade, thickness, foil and order quantity; no stock promise |
Do not miss: The historical reference values here are measured at 1.9 GHz. Do not call them a 10 GHz or mmWave design model.
Historical provenance: the archived Taconic Laminate Material Guide used for this table. The historical values and stated test conditions are retained for identification; they are not current purchase limits. Verify the ordered grade against its original datasheet and certificate. For current product families and supplier document requests, consult the AGC Multi Material official solutions guide. That current guide does not independently verify every historical value above.
A release sequence for RF-35
Material release
Name RF-35, the supplier revision, thickness and foil. Separate approved substitutions from suggestions awaiting approval.
CAM and stackup
Review layer references, panelization, copper balance, minimum features and finished geometry. Distinguish ceramic-filled PTFE from RO4350B thermoset construction.
Process definition
Use the applicable laminate and bonding guides. Agree drilling, hole-wall treatment and lamination details for this construction; do not assume a universal FR-4 recipe.
Patterning and final build
Control conductor geometry, hole quality, mask openings and finish on exposed RF areas. Include special edges, cavities or connectors in the release.
Inspection and acceptance
Define dimensional, netlist and impedance checks. RF loss or phase measurements need a separate coupon/fixture, frequency range and acceptance limit.
Review the manufacturing capability tables for general process limits and quality documentation and acceptance planning for supplier review. A listed material property is not a RAYPCB test report.
Agree what the inspection can prove
| Record | What it establishes | What it does not establish |
|---|---|---|
| Material certificate | Declared laminate identity and lot | Measured loss of your finished circuit |
| Netlist electrical test | Open/short connectivity to the test data | Insertion loss, phase or return loss |
| Impedance coupon | Agreed geometry at the measured coupon | Every RF transition in the product |
| RF test report | Response in the stated fixture and frequency range | Performance in a different enclosure or calibration plane |
Record specimen, fixture, method, frequency, temperature, limits and disposition. Separate a missing document from a nonconforming measured result.
Check geometry before approving the release
A ceramic-filled PTFE material combines an electrical and mechanical construction that must be identified by its full grade. A similar nominal Dk in another resin system is not sufficient for a drop-in change. The drilling, surface preparation, bonding and etching plan should be reviewed against the grade-specific processing guide.
- Distinguish ceramic-filled PTFE from RO4350B thermoset construction
- Carry the source revision with the stackup
- Qualify any alternate material before production
Taconic PCB Design Workbench
The RF tool uses an editable model Dk; the preset is a supplier reference at its stated method and frequency. It is not a universal design Dk. Blank parameters stay blank until you provide a value. Geometry calculations do not approve a fabrication tolerance.
For microstrip, h is the dielectric separation to the reference plane; for symmetric stripline it is the total plane spacing. Propagation follows λg = c/(f√εeff). Thermal screening uses R = h/(kA). Read the selected model’s exclusions beside the result.
For more geometries and fabrication tolerance context, use the PCB impedance calculator and design guide.
RF-35 PCB cost & quotation brief
A quote for RF-35 depends on the approved material construction, purchased sheet utilization, quantity, layer count, drilling/lamination work, finish and inspection scope. There is no defensible fixed “Taconic multiplier” across these products. For older designations, sourcing confirmation may be the first cost decision.
Taconic PCB Cost & Quotation Brief
Use the brief without prices, or enter your own setup and fabrication-area allowances to explore a simple two-layer planning range. The tool does not contain verified current supplier rates. Hybrid, multilayer, bonding-film and RF-qualified builds are routed to engineering quotation.
| Cost question | Information to provide |
|---|---|
| Material | Exact code, thickness, foil, substitutions allowed or prohibited |
| Fabrication | Gerber/ODB++, drill data, stackup, copper, outline and special features |
| Acceptance | Net classes, impedance target/tolerance and any RF test fixture |
| Order | Quantity, requested delivery date, repeat-build needs and assembly scope |
RF-35 questions before ordering
What does the RF-35 material name guarantee?
It identifies a material or family to resolve in the supplier documentation. The exact code, thickness, foil and data-sheet revision still need to be specified. It does not guarantee RAYPCB stock, lead time or an application qualification.
Which Dk should I use in my RF model?
Archived guide: Dk/Df 1.9 GHz, modified stripline 2.5.5.5.1. Use a model Dk appropriate to your geometry and frequency. A process test value is useful reference data but is not automatically the effective permittivity of a microstrip.
Can I replace RF-35 with another Taconic or Rogers grade?
The historical reference values here are measured at 1.9 GHz. Do not call them a 10 GHz or mmWave design model. Compare the complete electrical, mechanical and processing requirements, then approve the alternate explicitly.
What design detail deserves the first review?
Distinguish ceramic-filled PTFE from RO4350B thermoset construction. Keep core and bonding-layer properties separate in the RF model.
Does a netlist test verify RF performance?
No. Netlist testing checks connectivity. RF performance requires defined measurement structures, frequency range, reference planes and limits. State the required measurement in the RFQ.
How do I obtain a usable quotation?
Send the fabrication files, drill data, stackup, exact material code, quantity and acceptance requirements. Include your requested date; the delivery commitment depends on sourcing and process review.
Next useful references: Taconic PCB manufacturing · full Taconic material directory · Fabrication preparation for RF-35 · Material properties and design for RF-35 · RF-35 versus RO4350B comparison.
Send the design with its material context
Preliminary files are welcome. Identify the design revision and open material decisions so the enquiry can address the actual manufacturing scope.
Send RF-35 files for review
