Routing Neck Up Down - SOLIDWORKS PCB 2018. SOLIDWORKS PCB 2018 Routing Neck Up Down is a powerful feature that allows us this flexibility when we route traces and for when the trace needs to be decreased. This tool is useful for the PCB layout which allows us to complete design faster. Subscribe to our channel: http://goo.gl/z3rQfT Visit our website: http://www.solidworks.com/ Follow us!