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What are the functional differences and roles of Rogers 3003 and 3003G2?

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Rogers RO3003 and RO3003G2 are both high-frequency circuit board materials that are ceramic-filled polytetrafluoroethylene (PTFE)-based circuit materials, but there are some functional differences between them:

Rogers RO3003 Functional Characteristics:

Dielectric Constant: 

Dk is 3.00 +/- 0.04, which ensures the stability of the material at different frequencies.

Dielectric Loss: 

Df of 0.0010@10GHz, indicating that the material has very low loss.

Stability: 

Stable dielectric constant at different temperatures and frequencies, eliminating the step change in dielectric constant at room temperature of common PTFE materials.

Mechanical Properties: 

Superior stability of mechanical properties facilitates designers to use materials with different dielectric constants when designing multi-layer circuits.

Dimensional Stability: 

Exhibits excellent dimensional stability due to a coefficient of thermal expansion comparable to copper, with typical values of etch shrinkage below 0.5 mils/inch.

Coefficient of Thermal Expansion: 

Low coefficients of thermal expansion (CTE) of 17, 16, and 25 ppm/°C for the X, Y, and Z axes, respectively, help maintain board dimensional stability.

Application Areas: 

Widely used in 77 GHz radar applications, automotive radar, adaptive cruise control, forward collision warning, active brake assist, lane change assist, and more.

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Rogers RO3003G2 Functional Features:

Next-generation High Frequency PCB Material: 

Designed as an enhanced version of RO3003 for next-generation millimeter-wave automotive radar applications.

Optimized Resins and Fillers: 

Based on industry feedback, the resin and filler content has been further optimized to provide lower insertion loss.

Very Low Profile Electrolytic Copper: 

Very Low Profile Electrolytic Copper (VLP ED Copper) has been introduced to help reduce insertion loss.

Dielectric Constant: 

Dielectric constants of 3.00 and 3.07 at 10 GHz and 77 GHz, respectively, maintain material consistency and stability.

Insertion Loss: 

The 5 mil laminate exhibits very low insertion loss of 1.3 dB/inch at 77 GHz.

Optimized Resin and Filler System: 

The resin and filler have been further optimized to provide lower insertion loss, suitable for various applications in ADAS systems.

VLP Copper Foil: 

The use of VLP (Very Low Profile) copper foil helps to reduce dielectric porosity and improve circuit performance.

Homogeneous Material and Structure: 

More homogeneous material and structure further minimize the Dk variation of the finished board.

Advanced Filler System: 

A more advanced filler system is utilized to support higher density/smaller diameter microvia designs.

Multi-location Global Production and Supply: 

Support multi-location global production and supply.

Application Areas: 

For adaptive cruise control, forward collision warning, active brake assist, lane change assist, traffic jam navigation, automatic parking, blind spot detection, etc.

Function Difference:

RO3003G2 is an enhanced version of RO3003, especially optimized for millimeter wave automotive radar applications.

The main advantages of the RO3003 are its stability and mechanical characteristics, which make it suitable for high-frequency applications that require high reliability and consistency.

The RO3003G2 builds on the RO3003 by providing lower insertion loss and better high-frequency performance through material and process optimization, making it particularly suitable for use in next-generation millimeter-wave automotive radar and other Advanced Driver Assistance Systems (ADAS) applications that require higher performance.

RO3003G2 utilizes more advanced materials and technologies, such as an electrolytic copper foil with very low roughness and advanced specialty fillers with smaller particles, to achieve lower insertion loss and higher circuit design density.

The dielectric constant of RO3003G2 changes slightly to 3.07 at 77 GHz, while RO3003 is 3.00 at 10 GHz.

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