Table 3.

Mean impedance of 30 μm TiN microelectrodes at 1 kHz before and after cell experiments performed in different cell culture media.

			Before cell experiments		After cell experiments
MEA manufacturer	TiN type	Medium	AVG [kΩ]	Stdev [kΩ]	AVG [kΩ]	Stdev [kΩ]	Count of MEAs	Count of cell experiments**
BMT	IBAD	NDM	83	5	143	38	5	1
BMT	IBAD	BPH	87	5	35*	26*	5	1
BMT	IBAD	none	94	21	137	16	2	0
MCS	Sputtered	NDM	46	32	114	86	5	2
MCS	Sputtered	BPH	43	30	101	97	4	2

^*Unreliable result as the Si₃N₄ insulator layer was almost completely corroded.

^**Between impedance measurements.