Additive manufacturing, also called rapid prototyping or 3D printing is a disruptive manufacturing technique with a significant impact in electronics. With 3D printing, bulk objects with circuitry are embedded in the volume of an element or conformally coated on the surface of existing parts, allowing design and manufacturing of smaller and lighter products with fast customisation. The book covers both materials selection and techniques. The scope also covers the research areas of additive manufacturing of passive and active components, sensors, energy storage, bioelectronics and more.