Patent ID: 11946847
Assignee: THE UNIVERSITY OF TOKYO
Field: Measurement (Instruments)
Classification: CPC G  C  B | IPC C  G

Claim 3:
4. The extracellular potential measurement device according to claim 3, further comprising multiple second electrode wires each of which is made from an electroconductive material, the second electrode wires being arranged in multiple heights,
each of the second electrode wires being interposed between an upper insulating film and a lower insulating film,
each of the insulating films, except for the lowermost insulating film, having a second opening penetrating the insulating film,
the second opening in a lower insulating film having a size that is less than that of the second opening in an upper insulating film, the second openings in the insulating films being overlapped to form a second recess having a size reducing downward, the second recess being adapted to store a second collection of cells to which the axon is connected, the second recess being connected to the groove,
each of the second electrode wires having an end that is located near a second opening in an insulating film that is immediately below the second electrode wire, the ends of the second electrode wires being exposed in the second recess.