Rogers CuClad 250 2-Layer 10mil Immersion Gold PCB – High Frequency Microwave Applications

1. Introduction to Rogers CuClad 250 PCB

Rogers CuClad 250 laminates are cross plied, woven fiberglass and PTFE composite laminates that offer low dielectric constants ranging from 2.40 to 2.55 at 10GHz. CuClad 250 laminates use a higher fiberglass/PTFE ratio to provide mechanical properties approaching those of conventional substrates. These laminates provide better dimensional stability and lower thermal expansion in all directions.

CuClad 250 laminates feature cross-plied construction (alternating layers of coated fiberglass plies oriented 90° to each other) which provides true electrical and mechanical isotropy in the XY plane. This 2-layer rigid PCB is constructed entirely with CuClad 250 as the core material, making it ideal for radars, microwave components (LNAs, filters, couplers), and electronic countermeasure systems.

2. Key Features of Rogers CuClad 250 PCB

• Dielectric Constant: 2.40 to 2.55 at 10 GHz / 1MHz

• Dissipation Factor: 0.0017 at 10 GHz

• Low Moisture Absorption: 0.03%

• Strong Peel Strength: 14 lbs/in

• Low outgassing: TML 0.01%, CVCM 0.0%, WVR 0.0%

• Cross Plied Woven Fiberglass construction

• High PTFE to Glass Ratio

• Balanced electrical and mechanical properties

• Better Dk uniformity than non-woven fiberglass reinforced laminates

• Low circuit losses at high frequency

3. Benefits of Rogers CuClad 250 PCB

• Cross-plied construction provides balanced electrical and mechanical properties

• Low Dk supports wider line widths for lower insertion loss

• Low circuit losses at high frequency

• Better dielectric constant uniformity than comparable non-woven fiberglass reinforced laminates

• Well suited for Er sensitive circuits

• Excellent dimensional stability and lower thermal expansion in all directions

• True electrical and mechanical isotropy in the XY plane

4. PCB Construction Details

5. PCB Stackup (2-Layer Rigid Structure)

Copper_layer_1 (Top) – 35 μm (1 oz)

Rogers CuClad 250 Core – 0.254 mm (10mil)

Copper_layer_2 (Bottom) – 35 μm (1 oz)

Total thickness: 0.4mm (including copper layers)

6. PCB Statistics

Components: 12

Total Pads: 34

Thru Hole Pads: 18

Top SMT Pads: 16

Bottom SMT Pads: 0

Vias: 9

Nets: 2

7. Rogers CuClad 250 Material – Product Introduction

CuClad® series laminates are woven fiberglass/PTFE composite materials for use as printed circuit board substrates. Using precision control of the fiberglass/PTFE ratio, CuClad laminates offer a range of choices from the lowest dielectric constant and loss tangent to a more highly reinforced laminate with better dimensional stability.

The woven fiberglass reinforcement in CuClad products provides greater dimensional stability than non-woven fiber glass reinforced PTFE based laminates of similar dielectric constants. The consistency and control of the PTFE coated fiberglass cloth allows Rogers to offer a greater variety of dielectric constants and produces a laminate with better dielectric constant uniformity than comparable non-woven fiberglass reinforced laminates. These properties make CuClad an attractive choice for filters, couplers and low noise amplifiers.

CuClad laminates are crossplied (alternating layers of coated fiberglass plies are oriented 90° to each other). This provides true electrical and mechanical isotropy in the XY plane, a feature unique to CuClad laminates. No other woven or nonwoven fiberglass reinforced PTFE based laminates make this claim.

8. Features and Benefits Summary

9. CuClad 250 Typical Properties (Data Sheet)

10. Primary Application Areas

• Radars, Electronic Countermeasures, Electronic Support Measures

• Microwave Components (LNAs, filters, couplers, etc.)

• Phased array antennas

• Low noise amplifiers

• Satellite communication systems

11. Quality Assurance

• Type of artwork supplied: Gerber RS-274-X

• Accepted standard: IPC-Class-2

• Availability: Worldwide

• 100% Electrical test prior to shipment

12. Standard Thicknesses, Panel Sizes & Claddings