RO4350B and S1000-2M High-Performance PCB Design – Ideal for RF, Radar, and Millimeter-Wave Applications

1. Introduction of RO4350B

Rogers RO4350B materials are proprietary woven glass-reinforced hydrocarbon/ceramics that offer electrical performance comparable to PTFE/woven glass while maintaining the manufacturability of epoxy/glass. RO4350B laminates provide precise control over dielectric constant (Dk) and low loss, utilizing standard epoxy/glass processing methods. They are cost-effective compared to conventional microwave laminates and do not require special handling procedures. These materials are UL 94 V-0 rated, suitable for high power RF designs.

The thermal coefficient of expansion (CTE) of RO4350B is similar to copper, ensuring excellent dimensional stability crucial for mixed dielectric multi-layer board constructions. The low Z-axis CTE guarantees reliable plated through-hole quality, even under severe thermal shock. The material has a Tg of >280°C (536°F), ensuring stable expansion characteristics throughout circuit processing temperatures.

2.Key Features:

(1).Features of RO4350B

Dielectric Constant of DK 3.48 ±0.05 at 10GHz/23°C
Dissipation Factor of 0.0037 at 10GHz/23°C
Thermal Conductivity: 0.69 W/m/°KB
X-axis CTE: 10 ppm/°C, Y-axis CTE: 12 ppm/°C, Z-axis CTE: 32 ppm/°C
High Tg value of >280°C
Low water absorption: 0.06%

(2).Features of S1000-2M

Lower Z-axis CTE for improved through-hole reliability
Excellent mechanical processability and thermal resistance
Lead-free compatible
Tg180°C (DSC), UV blocking/AOI compatible
High heat resistance
Excellent anti-CAF performance
Low water absorption

3.PCB Stackup: 4-layer rigid PCB

4.PCB Construction Details

5.PCB Statistics

Components: 33
Total Pads: 242
Thru Hole Pads: 125
Top SMT Pads: 117
Bottom SMT Pads: 0
Vias: 49
Nets: 3

6.Accepted Standards

Artwork Format: Gerber RS-274-X
Quality Standard: IPC-Class-2 compliant
Availability: Worldwide production and shipping

7.Typical Applications

Commercial airline broadband antennas
Microstrip and stripline circuits
Millimeter wave applications
Radar systems
Guidance systems
Point-to-point digital radio antennas