The types segment classifies Modified Epoxy Resin for CCLs into several chemical families, each engineered to meet specific performance targets. The largest group, bisphenol‑A (BPA) based resins, captures roughly 40 % of the market owing to their balanced viscosity, cure speed, and cost efficiency, making them suitable for high‑volume flexible and rigid CCL production. Bisphenol‑F (BPF) derivatives, accounting for about 25 %, provide lower water absorption and improved thermal stability, which is valuable for high‑frequency substrates. Cycloaliphatic epoxy resins, representing 20 %, deliver superior moisture resistance and low dielectric constant, positioning them in premium aerospace and defense applications. Novolac‑based epoxies, with a 10 % share, are chosen for their high glass transition temperature and chemical resistance, supporting harsh‑environment PCBs. Emerging specialty grades, such as fluorinated and silicone‑modified epoxies, occupy the remaining 5 % and target niche markets requiring extreme dielectric performance. Collectively, these resin types shape the market taxonomy by aligning material attributes with the functional demands of each application segment.