This document contains tags and metadata for various topics related to printed circuit boards (PCBs), including PCB manufacturing technologies, materials, board types (e.g. multilayer, rigid flex), finishing processes (e.g. HASL, ENIG, gold fingers) and PCB equipment. It includes over 30 entries with details on double sided boards, multilayer boards, boards with heavy copper, contact information and more. The tags are meant to help with searching and organizing information about PCBs and related manufacturing processes.