Rogers 4350B PCB Engineering Tool | RO4350B Design & Cost Calculator

Material Reference

Rogers RO4350B Material Properties

Complete datasheet reference for Rogers 4350B PCB — electrical, thermal, mechanical, and available thickness specifications.

3.48

Dielectric Constant (Dk) ±0.05 @10GHz

0.0037

Loss Tangent (Df) @10GHz

>280°C

Decomposition Temp (Td)

0.69

Thermal Conductivity (W/m·K)

Electrical Properties

RF/microwave performance data

Dielectric Constant (Dk)	3.48 ±0.05
Loss Tangent (Df) @10GHz	0.0037
Volume Resistivity	1.2×10¹⁰ MΩ·cm
Surface Resistivity	4.2×10⁹ MΩ
Dielectric Breakdown	500 V/mil
Arc Resistance	125 sec

Thermal Properties

High-temperature performance

Glass Transition Temp (Tg)	>280°C
Decomposition Temp (Td)	390°C
Thermal Conductivity	0.69 W/m·K
CTE X-axis	10 ppm/°C
CTE Y-axis	12 ppm/°C
CTE Z-axis	32 ppm/°C

Mechanical Properties

Physical characteristics

Tensile Modulus	12,066 MPa
Tensile Strength	186 MPa
Flexural Strength	241 MPa
Peel Strength (1oz Cu)	1.05 N/mm
Density	1.86 g/cm³

Available Thicknesses

Standard laminate options

4 mil (very thin)	0.102 mm
6.6 mil	0.168 mm
10 mil	0.254 mm
20 mil (popular)	0.508 mm
30 mil	0.762 mm
60 mil (thick)	1.524 mm

Frequently Asked Questions — Rogers RO4350B PCB

What is Rogers 4350B PCB material?

Rogers 4350B (RO4350B) is a high-frequency laminate manufactured by Rogers Corporation. With a dielectric constant of 3.48 ±0.05 at 10GHz and an exceptionally low loss tangent of 0.0037, it is engineered for RF and microwave PCB applications from DC to 77GHz. It is widely used in 5G infrastructure, automotive radar (24/77GHz), satellite communications, and test equipment.

What is the dielectric constant of Rogers RO4350B?

The dielectric constant (Dk) of Rogers RO4350B is 3.48 ±0.05, measured at 10GHz. This value is stable across 1GHz to 40GHz — a critical advantage over FR-4, whose Dk varies significantly with frequency. This stability enables predictable impedance control in precision RF designs.

What thicknesses are available for Rogers 4350B?

Rogers 4350B is available in six standard thicknesses: 4mil (0.102mm), 6.6mil (0.168mm), 10mil (0.254mm), 20mil (0.508mm), 30mil (0.762mm), and 60mil (1.524mm). The 20mil thickness is most common for 5.8GHz designs; 10mil is popular for 77GHz automotive radar.

Can Rogers 4350B be used in hybrid stackups with FR-4?

Yes — one of Rogers 4350B's biggest advantages. It is compatible with standard FR-4 processes and can be combined with FR-4 using RO4450F or RO4450B prepreg. This allows engineers to use Rogers only on critical RF signal layers and FR-4 for digital/power layers, reducing total board cost while maintaining RF performance.

What surface finish is recommended for Rogers 4350B RF PCBs?

ENIG (Electroless Nickel Immersion Gold) is the preferred finish for Rogers 4350B RF PCBs. Flat surface ideal for RF signal integrity, excellent solderability for fine-pitch SMD components. Immersion silver also delivers outstanding high-frequency performance. Avoid HASL above 6GHz.

How much does a Rogers 4350B PCB cost compared to FR-4?

Rogers 4350B PCB fabrication is typically 5–10× more expensive than standard FR-4 due to the specialty laminate material. Exact cost depends on board dimensions, layer count, quantity, surface finish, controlled impedance, and lead time. Use the Cost Estimator tab above, or contact PCBSync at sales@pcbsync.com for an accurate quotation.

Impedance Calculator

Microstrip Impedance Calculator

Calculate characteristic impedance Z₀ for Rogers 4350B PCB using Wheeler's approximation.

Microstrip Line Calculator

Calculate impedance for Rogers 4350B

Trace Width W (mm)

Substrate Height H (mm)

Copper Thickness T (µm)

Dielectric Constant εr

Characteristic Impedance (Z₀)

50.0 Ω

Effective εr

2.82

W/H Ratio

2.17

Phase Vel. (mm/ns)

178

W = 0.55 mm

RO4350B εr=3.48 H=0.254mm

Microstrip Cross-Section

Quick Reference — 50Ω on RO4350B

10mil sub (0.254mm)	W = 0.55mm
20mil sub (0.508mm)	W = 1.12mm
30mil sub (0.762mm)	W = 1.68mm
75Ω on 10mil sub	W = 0.25mm
100Ω on 10mil sub	W = 0.10mm

Stack-up Designer

Layer Stack-up Designer

Visualize and configure Rogers 4350B PCB layer stack-ups for 2-layer and 4-layer hybrid designs.

2-Layer RO4350B

Standard RF single-board design

Substrate Thickness

Solder Mask Top~25μm

L1 — Signal / RF Trace35μm

Rogers RO4350B Core0.508mm

L2 — Ground Plane35μm

Solder Mask Bottom~25μm

Total Board Thickness

0.608 mm

4-Layer Hybrid Rogers + FR-4

Cost-optimized mixed dielectric

Solder Mask Top~25μm

L1 — RF Signal35μm

Rogers RO4350B Core0.254mm

L2 — RF Ground35μm

RO4450F Prepreg0.1mm

L3 — Power35μm

Rogers RO4350B Core0.508mm

L4 — Signal / GND35μm

Solder Mask Bottom~25μm

Total Thickness (approx)

1.14 mm

Compatible Prepreg Options for Rogers 4350B PCB

RO4450F	Dk 3.52 — best for Rogers-to-Rogers bonding
RO4450B	Dk 3.54 — halogen-free variant
Thickness	3–4 mil (0.076–0.102mm)
FR-4 hybrid bonding	Supported with proper CTE matching
Max layer count	20+ layers achievable

DFM Reference

Rogers 4350B PCB Design for Manufacturing Tips

Key PCB design and fabrication rules for Rogers RO4350B, verified by PCBSync RF engineers.

01

Drilling Considerations

Rogers 4350B requires carbide drills with high helix angles. Minimum via: 8mil (0.2mm). Use pecking cycles for aspect ratios >6:1. Reduce drill speed 20% vs. FR-4 to prevent delamination and fiber pull-out.

02

Copper Adhesion

Use micro-etching surface prep before copper plating. Ensure peel strength >1.0 N/mm for 1oz copper. Avoid aggressive alkaline cleaners — they degrade RO4350B surface chemistry and reduce adhesion.

03

Impedance Control

Account for ±0.05 Dk variation in impedance budgets. Always include test coupons in the panel for impedance verification. Use ground pour stitching every λ/20 and maintain the 3H trace-to-edge clearance rule.

04

Via Design for RF

Add via fencing around all RF traces at λ/10 spacing. Back-drill stubs for frequencies >5GHz to eliminate resonance. Use filled-and-capped via-in-pad for fine-pitch components. Add ground via arrays at connector transitions.

05

Thermal Management

Apply thermal relief on high-power component pads. Add thermal vias under QFN/BGA packages. Copper coin insertion helps with heat spreading in PA designs. Operating range: −55°C to +125°C.

06

Hybrid Stackup Design

Rogers 4350B supports hybrid stackups with FR-4 using RO4450F prepreg — use Rogers for RF signal layers and FR-4 for digital/power to reduce cost. Carefully match CTE at material transitions to prevent thermal cycling delamination.

07

Surface Finish Selection

ENIG is preferred for Rogers 4350B RF PCBs — flat, consistent, excellent solderability. Immersion silver offers outstanding HF performance. OSP acceptable below 3GHz. Avoid HASL for fine-pitch components or designs above 6GHz.

08

Panel Utilization

Standard Rogers panel: 18"×24" or 18"×12". Optimize PCB placement for maximum material yield. Include tooling holes (Ø3.2mm), fiducials, and coupon rows. Min board-to-edge clearance: 5mm. Use 3mm breakaway tabs with V-score or mouse bites.

Cost Estimation

Rogers 4350B PCB Cost Estimator

Estimate fabrication cost for your RO4350B PCB project. Contact PCBSync for a precise quote.

Board Dimensions (mm × mm)

Layer Count

Quantity (pcs)

Surface Finish

Min Trace / Space (mil)

Lead Time

Material

—

Fabrication

—

Surface Finish

—

Testing / QC

—

Estimated Total

—

Note: This is a rough estimate only. Rogers 4350B PCB pricing depends on panel yield, copper weight, controlled impedance requirements, and testing. Contact PCBSync for an accurate quotation.

Email Quote Request Order RO4350B PCB

Material Comparison

Rogers 4350B vs Other RF PCB Materials

How does Rogers RO4350B stack up against competing high-frequency laminates?

Material	Dk @10GHz	Loss Tangent	Tg (°C)	Cost	FR-4 Process	Best For
Rogers RO4350B ★	3.48 ±0.05	0.0037	>280	Med–High	Compatible	5G, Radar, SATCOM
Rogers RO4003C	3.55 ±0.05	0.0027	>280	Med–High	Compatible	Lower-loss broadband
Taconic TLY-5	2.17 ±0.02	0.0009	N/A (PTFE)	High	Special	Ultra-low loss mmWave
Isola I-Tera MT40	3.45 ±0.05	0.0031	200	Medium	Compatible	Digital + RF hybrid
Ventec VT-901	3.80 ±0.05	0.0040	250	Medium	Compatible	Cost-sensitive RF
Standard FR-4	4.2–4.8	0.018–0.022	130–180	Low	Standard	Low-freq / digital

Why Rogers 4350B PCB? RO4350B delivers the ideal balance of low loss, stable Dk, FR-4-compatible processing, and wide global availability. It is the PCB industry's most popular RF laminate for designs from 500MHz to 40GHz — and the go-to choice for 5G, automotive radar, and satellite applications.

RF Design Calculator

Wavelength & RF Design Calculator

Compute free-space wavelength, guided wavelength, and key RF trace reference lengths for Rogers 4350B PCB at any frequency.

Input Parameters

Enter frequency and material constant

Operating Frequency (GHz)

Dielectric Constant εr

Free Space λ₀

51.7 mm

Guided λg

27.7 mm

Effective εr

2.85

RF Design Reference Lengths

6.9

λ/4 Stub Length (mm)

13.9

λ/2 Resonator (mm)

2.8

λ/10 Via Pitch (mm)

1.4

λ/20 Ground Stitch (mm)

Tip @5.8GHz: The guided wavelength of ~27.7mm on Rogers 4350B PCB is ideal for compact patch antennas, branch-line couplers, and Wilkinson power dividers.

Ro4350B PCB Engineering Tool