An electronic device may include a substrate, a conductive layer on the substrate, and an insulating spacer. The conductive electrode may have an electrode wall extending away from the substrate. The insulating spacer may be provided on the electrode wall with portions of the electrode wall being free...http://www.google.de/patents/US7491601?utm_source=gb-gplus-sharePatent US7491601 - Methods of forming electronic devices including electrodes with insulating spacers thereon