PCB hybrid on 4 mil High frequency 6 layer rigid PCBs are made by Isolar (370HR) and Rogers

RO4835 PCB

1. Introduction:
Rogers' RO4835 laminate offers enhanced stability at high temperatures and is more resistant to oxidation

than other hydrocarbon materials. RO4835 laminates share similar electrical and mechanical properties with

RO4350B laminates and are designed for high-frequency performance and cost-effective circuit fabrication.

They utilize standard epoxy/glass (FR-4) processes and are competitively priced. RO4835 laminates are

low-loss materials suitable for low-cost circuit fabrication and are available with Rogers' proprietary LoPro

Reverse treated copper foil, ideal for applications requiring low insertion loss.

Isola's 370HR laminates are made using a patented high-performance 180°C Tg FR-4 multifunctional epoxy

resin system designed for multilayer Printed Wiring Board (PWB) applications requiring maximum thermal

performance and reliability. Manufactured with high-quality E-glass glass fabric for superior Conductive Anodic

Filament (CAF) resistance, 370HR provides excellent thermal performance with a low Coefficient of Thermal

Expansion (CTE) and mechanical, chemical, and moisture resistance properties that meet or exceed traditional

FR-4 materials.

2. Features of RO4835:

• RoHS compliant for applications requiring UL 94 V-0
• IPC-4103 compliant
• Dielectric constant (Dk) of 3.48 +/- 0.05
• Dissipation factor of 0.0037 at 10 GHz
• Glass Transition Temperature (Tg) >280 °C TMA
• Coefficient of Thermal Expansion of 10 ppm/°C (X-axis), 12 ppm/°C (Y-axis), 31 ppm/°C (Z-axis)

3. Features of 370HR:

• RoHS Compliant and UL 94-V0 flammability
• CAF resistant
• Dielectric constant (Dk) of 3.92 at 10 GHz
• Dissipation factor of 0.025 at 10 GHz
• Glass Transition Temperature (Tg) by DSC of 180 °C
• X/Y-Axis CTE (Pre-Tg) of 13/14 ppm/°C, 45 ppm/°C on Z-axis, HDI technology compatible

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4. PCB Stackup: 6-layer Rigid PCB:

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6. PCB Statistics:

• Components: 26
• Total Pads: 77
• Thru-Hole Pads: 45
• Top SMT Pads: 32
• Bottom SMT Pads: 0
• Vias: 33
• Nets: 8

7. Artwork Standard: Gerber RS-274-X

8. Accepted Standard: IPC-Class-2

9. Service Area: Worldwide

10. Typical Applications:

• Automotive Radar and Sensors
• Point-to-Point Microwave
• Power Amplifiers
• Phased-Array Radar
• RF Components

Experience the exceptional thermal and electrical performance of RO4835 and 370HR laminates in your high-frequency applications, ensuring robust circuit functionality and reliability for critical electronic systems.