MEP EP#262: Flex PCB Primers

MEP EP#262: Flex PCB Primers
Parker Robert Feranec Published a video about what to consider when selecting chips for your new board design. Don’t want to steal Robert's content so go check him out. Hardware design and PCB Layout online course Comprehensive Power Supply System Designs for Harsh Automotive Environments Consume Minimal Space, Preserve Battery Charge, Feature Low EMI Analog engineer Bin Wu and previous Linear Tech engineer Zhongming Ye writing an application note with linear tech devices. ‘An Ideal Diode Satisfies Automotive Immunity Norms’ LT8672 Active rectifier controller Why is all this needed? Car power is dirty Load dumps Cold cranking Pulses ISO 7632-2 is a negative spike whose peak voltage exceeds −220 V! Reverse Polarity AC Ripple Stephen Wurth Elektronik on Flex PCBs Basically Polyimide foil with deposited copper 3 ways to create a system (from page 2) Heterogeneous Homogeneous Partial Homogeneous Full flex and Semiflex Much Much easier way to create a 3d system design Added benefit of having a full panelized system Can test a full panel of designs all at once Test points can technically be on the flex Break and make Take the rails off of the PCB Flex-rigid boards Can be bonded to external layers Can be internal Can be rigid on one side or both Can be multiple layers Layout and routing Create a new layer in your EDA tool to define the Flex portion No vias in flex portion Use teardrops for added rigidity Use wider tracks where possible for added strength Do not change width in bend area Distribute conductors evenly Documentation Do it... Do it a lot In addition to the PCB gerber or ODB++ files include drawings A fab drawing that defines the flex pcb is very helpful