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Isola IS680 AG-348

Jarnistech > Isola PCB > Isola IS680 AG-348
Isola IS680 AG-348 PCB Board

The choice of PCB substrate material plays a critical role in determining the performance and reliability of high-frequency electronic applications. Isola IS680 AG-348 PCB substrates have emerged as a compelling solution, offering a balance of cost-effectiveness, electrical performance, and process compatibility. With their stable dielectric properties, low loss, and wide temperature tolerance, IS680 AG-348 laminates have become a go-to choice for RF/microwave designs. This article provides an overview of the exceptional features and benefits of IS680 AG-348 PCB substrate materials

Isola IS680 AG-348

IS680 AG-348 proves to be highly suitable for a wide array of contemporary commercial RF/microwave printed circuit designs. Notably, it boasts a reliable dielectric constant (Dk) that remains stable across temperatures ranging from -55°C to +125°C, even when operating at W-band frequencies. A remarkable feature of IS680 AG-348 is its remarkably low dissipation factor (Df), which positions it as an exceptionally cost-effective alternative to conventional microwave laminate materials, including PTFE, in applications requiring double-sided functionality.

Features of IS680 AG-348 PCB Materials:

1. Dielectric Constant (Dk) Stability: AG-348 exhibits exceptional stability in its dielectric constant across a wide temperature range. It maintains its Dk stability between -55°C and +125°C, making it suitable for reliable performance in varying environmental conditions.

2. Frequency Compatibility: AG-348 is designed to support microwave and RF applications, including those operating at W-band frequencies. Its dielectric constant remains stable even at higher frequencies, ensuring consistent signal propagation and minimal signal loss.

3. Ultra-Low Dissipation Factor (Df): One of the notable properties of AG-348 is its extremely low dissipation factor. This characteristic contributes to the overall efficiency of the PCB by minimizing energy losses and enhancing signal integrity.

4. Cost-Effectiveness: AG-348 serves as an economical alternative to other commonly used microwave laminate materials, such as PTFE. Its cost-effectiveness makes it an attractive choice for commercial PCB designs, particularly in double-sided applications.

5. Process Compatibility: AG-348 is compatible with standard FR-4 processes, allowing for seamless integration into existing manufacturing workflows. It offers advantages such as reduced drill wear and eliminates the need for plasma desmear, simplifying the production process.

6. Consistent Dielectric Spacing: AG-348 maintains a consistent dielectric spacing, ensuring uniformity and reliability throughout the PCB design. This property contributes to predictable electrical performance and facilitates accurate impedance control.

Overall, AG-348 PCB materials combine stability, low dissipation, cost-effectiveness, and process compatibility, making them an excellent choice for a wide range of commercial RF/microwave printed circuit designs.

Comparison with Other PCB Materials

When comparing Isola IS680 AG-348 PCB laminates with other PCB materials, several factors come into play, including electrical performance, cost, mechanical properties, and manufacturing considerations. Here’s a comparison with some commonly used PCB materials:

1. FR-4: FR-4 is a widely used and cost-effective PCB material. It offers good mechanical strength and is suitable for general-purpose applications. However, compared to AG-348, FR-4 has higher loss tangent (Df) and lower frequency compatibility, making it less suitable for high-frequency RF/microwave applications.

2. PTFE (Polytetrafluoroethylene): PTFE-based laminates, such as Teflon, are known for their excellent electrical properties, including low Dk and Df values. They are highly stable across a wide temperature range and exhibit low signal loss at high frequencies. However, PTFE materials are more expensive than FR-4 and may require specialized manufacturing processes.

3. Rogers PCB Materials: Rogers Corporation offers a range of high-frequency laminates, such as RO4000 series and RO3000 series. These materials provide excellent electrical performance, low Dk, and low loss. They are specifically designed for RF/microwave applications and offer better performance than FR-4. However, they are typically more expensive than FR-4 and may require specialized manufacturing processes.

4. Ceramic PCB Materials: Ceramic materials, such as alumina (Al2O3) and aluminum nitride (AlN), have excellent thermal conductivity and high-frequency performance. They can handle high power levels and offer good thermal management. However, ceramic materials are more expensive than organic laminates like AG-348 and may have limitations in terms of flexibility and ease of manufacturing.

In comparison to the above materials, Isola IS680 AG-348 PCB laminates offer a balance between cost-effectiveness, high-frequency performance, stability, and process compatibility. They are designed to provide stable electrical properties, low loss, and good thermal stability across a wide temperature range. AG-348 laminates are compatible with standard FR-4 manufacturing processes, making them more accessible and cost-effective compared to some other high-frequency materials.

The choice of PCB material depends on the specific application requirements, budget constraints, desired electrical performance, and manufacturing considerations. It is important to evaluate the trade-offs and select the most suitable material that meets the project’s needs.

Applications of AG-348 PCB Materials

AG-348 PCB materials find application in various industries and technologies that require reliable RF/microwave performance and cost-effective solutions. Some of the common applications of AG-348 PCB materials include:

1. Communication Systems: AG-348 is well-suited for communication systems such as wireless base stations, satellite communication systems, radar systems, and telecommunication infrastructure. Its stable dielectric constant and low dissipation factor enable efficient signal transmission and reception at high frequencies.

2. Aerospace and Defense: AG-348 is utilized in aerospace and defense applications where stringent performance requirements and reliability are essential. It can be found in avionics, radar systems, satellite communication systems, electronic warfare equipment, and military-grade RF/microwave devices.

3. Automotive Electronics: AG-348 is increasingly used in automotive electronics, particularly in advanced driver-assistance systems (ADAS), radar systems, and vehicle communication modules. Its stability across temperature ranges and high-frequency compatibility make it suitable for automotive applications.

4. Industrial and Scientific Instruments: AG-348 is employed in various industrial and scientific instruments that utilize RF/microwave technology. This includes test and measurement equipment, scientific research instruments, industrial automation systems, and instrumentation for medical imaging.

5. IoT and Smart Devices: AG-348 is utilized in the manufacturing of IoT devices, smart home systems, wearables, and other wireless communication devices. Its stable performance and cost-effectiveness make it a preferred choice for these compact and connected devices.

6. High-Speed Data Communication: AG-348 is employed in high-speed data communication systems, including high-speed data routers, servers, and data centers. Its low dissipation factor enables efficient data transmission at high frequencies, supporting reliable and high-bandwidth communication.

These applications highlight the versatility and suitability of AG-348 PCB materials in diverse industries where RF/microwave performance, stability, and cost-effectiveness are crucial factors for successful product development.

Performance Evaluation and Testing of Isola IS680 AG-348

The performance evaluation and testing of Isola IS680 AG-348 PCB laminates involve a series of tests and measurements to ensure their adherence to quality standards and desired specifications. Here are some common performance evaluation and testing methods:

1. Dielectric Constant (Dk) and Dissipation Factor (Df) Measurement: The Dk and Df values of IS680 AG-348 laminates are measured using a vector network analyzer (VNA) or impedance test equipment. These measurements verify the material’s electrical properties and its ability to maintain stable signal propagation and minimal energy loss.

2. Thermal Stability Testing: The laminates are subjected to thermal stability testing across a range of temperatures, typically from -55°C to +125°C. This evaluation ensures that the dielectric constant and other electrical properties remain stable within the specified temperature range.

3. Signal Integrity Testing: High-frequency signal integrity tests are performed to assess the laminate’s performance in terms of signal propagation, impedance control, and minimal signal distortion. Time-domain reflectometry (TDR) and eye diagram analysis are commonly used for signal integrity evaluation.

4. Mechanical Testing: Mechanical tests are conducted to evaluate the laminate’s durability and mechanical strength. This includes tests such as tensile strength, flexural strength, and peel strength measurements to assess the material’s resistance to bending, stretching, and delamination.

5. Chemical Resistance Testing: The laminates are exposed to various chemicals commonly encountered in PCB manufacturing processes or specific application environments. This testing ensures that the materials exhibit adequate chemical resistance and do not deteriorate or degrade when exposed to these substances.

6. Electrical Performance Testing: The laminates undergo electrical performance testing to verify their ability to meet specific electrical requirements. This includes tests for insulation resistance, breakdown voltage, and electrical conductivity to ensure proper electrical insulation and conduction.

7. Surface Roughness Measurement: Surface roughness is measured to evaluate the smoothness of the laminate’s surface. This measurement is critical for ensuring proper adhesion of copper traces and components during PCB assembly.

8. Flammability Testing: The laminates are subjected to flammability tests, such as the UL 94 standard, to determine their fire resistance and flammability rating. These tests assess the material’s ability to self-extinguish and limit the spread of flames in case of a fire.

By conducting these performance evaluation and testing procedures, Isola IS680 AG-348 PCB laminates can be thoroughly assessed for their electrical, thermal, mechanical, and chemical properties, ensuring their reliability and suitability for a wide range of RF/microwave printed circuit designs.

IS680 AG-348 PCB Materials: Availability

Standard Material Offering: Laminate

●Thickness: 60 mil (1.5mm)

●Available in full-size sheet or panel form, providing flexibility in application and manufacturing processes.

Copper Foil Type:

●VLP-2 (2 micron) copper foil available, suitable for a range of applications.

●Copper foil options include 1 oz and below, providing versatility based on specific design requirements.

Copper Weight:

Copper weight options include ½ oz and 1 oz (18 and 35 µm), catering to various conductivity needs.

●Heavier copper options are also available for applications requiring increased current handling capabilities.

●Thinner copper foil variants are offered for designs that prioritize space constraints or require finer trace routing.

The availability of IS680 AG-348 PCB materials in different forms, thicknesses, and copper foil options allows PCB manufacturers to select the most suitable configuration based on their specific design considerations and performance requirements.


In the realm of high-frequency electronic applications, the selection of a suitable PCB substrate material is paramount. Isola IS680 AG-348 PCB substrates have proven to be a reliable and cost-effective solution, empowering designers to unlock the full potential of their RF/microwave designs. With their stable dielectric properties, low loss, and wide temperature tolerance, IS680 AG-348 laminates offer the necessary foundation for efficient signal transmission, improved performance, and enhanced reliability. Choosing IS680 AG-348 PCB substrate materials opens up a world of possibilities, allowing engineers to push the boundaries of high-frequency technology.

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