Segmentation by types of PCB e‑scrap differentiates material composition and recovery complexity, influencing overall market size. Single‑sided boards, typically low‑cost and thin, form the baseline scrap stream, contributing modestly to total volume but offering high recovery efficiency for copper traces. Double‑sided boards increase material density, raising both weight and metal yield, thus representing a larger economic share. Multilayer PCBs—common in high‑performance computing and telecommunications—constitute the most valuable scrap tier, as they embed multiple copper layers, epoxy resin, and often precious‑metal finishes, driving higher processing costs and profitability. Flexible circuits, used in wearable and medical applications, add a distinct polymer‑rich fraction that requires specialized separation techniques, limiting their share but enhancing niche recycling revenue. Rigid‑flex hybrids combine attributes of rigid and flexible boards, creating a mixed‑material stream that challenges conventional processes yet offers diversified metal recovery. Understanding these type‑based nuances is essential for accurate market sizing and technology selection within the PCB E‑Scrap ecosystem.