A computer is used to identify the 3-dimensional location of a probe tip placed within the patient's nose or sinuses.

A smooth plug, fuel good at probe tip within minutes.

The most common design inserts a 9 megohm resistor in series with the probe tip.

Heat can be transferred through the edges of the probe tip to the sample.

These methods require the probe tip to be removed from the substrate in order to stop writing.

After writing, the probe tip can be used to read the indentations.

A bias of 5mV is applied across the probe tips.

Finally, systems based on arrays of probe tips have recently been announced.

To accomplish a read, the probe tip is heated to around 300 C and moved in proximity to the data sled.

RF energy emanates from the probe tip to tissue within about a millimeter.