A semiconductor substrate for a micro-fluid ejecting device. The patients may access the system using cards or CD-ROMS that are inserted into the patient’s computer. The first server is at a first address and the second server is at a second address. The optically isolating structure may, in some cases, extend between a contact surface of the monitoring device to a base portion of the sensor components or a surface of a circuit board to which the sensor components are mounted. In one embodiment, the insulating layer formed on both sides of the gate extends toward the channel region but not beyond the LDD regions. Thus, the present invention provides for a method and a HSS to allow the implicit registration of more than one IMPI, or the implicit registration of more than one contact address, or both, upon explicit registration of a subscriber with a given IMPIIMPU pair and a given contact address.