Biosensor chip and biosensor cartridges having the same

A biosensor cartridge comprising:

• a circuit board comprising a connection terminal configured to be electrically connected to an external diagnostic device;
• a biosensor chip configured to detect a target material from an analysis specimen, and transmit an electrical signal to the connection terminal of the circuit board based on the target material being present in the analysis specimen, the biosensor chip including a reactant configured to react specifically with the target material;
• and
• a housing enclosing the circuit board and the biosensor chip, and the connection terminal being exposed outside of the housing,
• wherein the biosensor chip comprises:
• a source electrode;
• a drain electrode;
• a plurality of channels separated from each other and disposed between the source electrode and the drain electrode, and
• a passivation layer covering the source electrode and the drain electrode, and exposing the plurality of channels,
• wherein a first electrode among the source electrode or the drain electrode is disposed corresponding to a center of an open area where the plurality of channels are exposed,
• wherein a second electrode among the source electrode or the drain electrode surrounds at least partially the first electrode,
• wherein one end of each of the plurality of channels overlaps with the source electrode and another end of each of the plurality of channels overlaps with the drain electrode, and
• wherein the reactant is attached to a plurality of channel areas, which are exposed portions of each of the plurality of channels.