Example image of eyePlorer eyePlorer map for 'Printed circuit board': Electrical conductor Electronic component Industrial etching Laminate Signal trace Point-to-point construction Wire wrap IPC (electronics) 1936 Austria Paul Eisler Radio 1943 World War II 1948 United States Army Turret board Through-hole technology Signal Corps (United States Army) Wave soldering Surface-mount technology Dielectric Epoxy Pre-preg Polytetrafluoroethylene Electroplating Screen-printing Hybrid integrated circuit Photoengraving Computer-aided manufacturing Photoplotter Printed circuit board milling Plotter Gerber File HPGL General Electric Plating Via (electronics) Tungsten carbide Automation Milling machine Excellon file Mohs scale of mineral hardness Laser Etching HASL Solder European Union Lead Restriction of Hazardous Substances Directive