en.Wedoany.com Reported - Advanced Circuitry and Chip Materials Company (ACCM) has launched the Celeritas SF1600 laminate and prepreg materials, fundamentally eliminating fiber weave skew at the material level. According to information released by ACCM, traditional woven glass reinforcements create a periodic dielectric environment in space, causing differential pair signals to alternately pass through resin-rich and glass-rich regions, generating timing skew. At 224 Gbps PAM4 and higher data rates, this skew cannot be resolved by panel rotation, serpentine routing, or sawtooth compensation. Celeritas SF1600 completely eliminates the root cause of skew through proprietary resin and reinforcement technology, providing verified zero-skew performance.

Celeritas SF1600 offers dielectric properties of Dk 2.80 and Df 0.0007, maintaining stability across the full frequency range and under varying temperature and humidity conditions. According to ACCM technical specifications, the material's measured insertion loss on a 56 GHz, 7-mil differential pair with HVLP4 copper foil is 1.05 dB/inch; loss is reduced to 0.95 dB/inch when using HVLP5 copper foil. The glass transition temperature is 215°C, the thermal decomposition temperature exceeds 400°C, and it has passed 50 simulated reflow cycles at 260°C. The thickness range is 25 to 150 microns, compatible with standard FR-4 lamination equipment, and requires no special storage, handling, or chemical formulations.

This material significantly outperforms quartz-based products in key performance metrics. According to ACCM comparison data, Grade 9 quartz-based systems have a peel strength of approximately 2 lbs/inch on HVLP4 copper foil and cannot be compatible with copper foils above HVLP5; Celeritas SF1600 has a peel strength exceeding 5 lbs/inch on HVLP4 while also being compatible with HVLP5. Regarding laser drilling, quartz-based materials have a softening point around 1,665°C, making it difficult for standard CO2 lasers to process them cleanly, with residual fibers on the microvia walls affecting plating quality and via reliability; Celeritas SF1600 can be cleanly drilled using standard CO2 and UV laser tools, and mechanical drilling shows no fiber pull-out or tool wear.

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