Isola wants to educate visitors on the advantages of halogen-free PCBs  

At next week’s DesignCon 2023, PCB circuit materials specialist, Isola Group, will be exhibiting its halogen-free PCBs and is inviting visitors to discover the “unmatched levels of electrical performance” possible with three halogen-free circuit materials. 

Isola Group will be unveiling its latest TerraGreen low-loss circuit materials, TerraGreen 400G, TerraGreen 400GE and TerraGreen 400G2. The circuit materials incorporate advances to Isola’s existing TerraGreen standard halogen-free circuit materials and TerraGreen (RF/MW) halogen-free circuit materials for RF and microwave circuit applications. 

The new TerraGreen circuit materials are based on selected glass fibres and smooth copper materials to form low loss circuit materials which are suited to high speed digital (HSD) and high frequency analogue circuits typically used to interconnect wired and wireless communications equipment and networks. 

The RoHS-compliant materials are for use with lead-free circuit manufacturing processes and compatible with FR-4 circuit material manufacturing processes. They are also suitable for producing cost-effective hybrid, mixed-signal circuits, said Isola Group. The three new TerraGreen materials feature glass transition temperature (Tg) of +200 degrees C and decomposition temperature (Td) of +380 degrees C. 

Isola Group’s chief sales and marketing officer, Sean Mirshafiei, explained that the  three new products were created with a halogen-free resin system that has “outstanding CAF and bond line resistance”. 

“TerraGreen 400G2 is our most advanced high speed digital product,” he added. “We use ultra smooth copper foil and ultra low Dk glass fabric that are combined with this novel resin system for optimal performance for the next generation of high end network and communication systems.”

The three new TerraGreen circuit materials deliver stability with temperature and frequency, maintaining constant permittivity (Dk) and loss tangent (Df) at temperatures from -55 to +125 degrees C. They are capable of even less loss than the company’s Tachyon 100G circuit materials at 28GHz. For example, TerraGreen 400G exhibits typical Dk of 3.1 at 5.0, 10, and 20GHz with typical loss tangent of 0.0018 at the same three evaluation frequencies. TerraGreen 400GE halogen-free circuit laminates offer higher Dk of 3.4 at 10 and 20GHz with slightly greater loss, with typical Df of 0.0026 at 10 and 20GHz. The lowest loss material, TerraGreen 400G2, features typical Dk of 3.1 at 5.0, 10, and 20GHz with typical Df of 0.0015 at the same three frequencies. 

Visit Isola at Booth 627 at DesignCon 2023 (31 January to 2 February) at the Santa Clara Convention Center, Santa Clara, California, USA. 

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