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I'm confused in the capacitive sensors footprint design

Question asked by Fco. Javier Rodriguez G on Oct 4, 2018
Latest reply on Oct 8, 2018 by Fco. Javier Rodriguez G


In this video it's stated that the interdigitated shapes for buttons must be avoided (18:07):

Best Practices for Capacitive Sensors Designs - YouTube 


but in the other side the NXP boards OM40001 and OM 13081 (LPCXpresso804 development kit and LPC824 touch solution, respectively) use such shapes (please see the attached image).


At first sight the stand alone capacitive sensors are using the same approach of that in such boards, so the question is: Which approach should I use for a new design based upon LPC8xx mcu's? Maybe I'm wrong thinking in that both products are the same (standalone and implementation based on mcus) that's way I ask to the experts.


Thank you!!