Patent ID: 8038860
Filing Date: 2011-10-18
Classification: G01N

Abstract:
1. A biosensor comprising a first insulating substrate and a second insulating substrate bonded together; a sample supply port which opens at one end of the bonded insulating substrates, and to which a sample solution is applied; a capillary communicated with the sample supply port, and into which the applied sample solution is introduced; an air hole which is positioned at an end of the capillary opposite the sample supply port and communicated with air inside the capillary; and a spacer having a groove, the spacer being disposed between the first insulating substrate and the second insulating substrate, wherein said sample supply port and said capillary are formed by bonding the insulating substrates together, wherein an auxiliary sample supply port communicated with said capillary, through which the applied sample solution is introduced into the capillary, is provided in the vicinity of said sample supply port, wherein the groove in the spacer forms the capillary and the sample supply port, wherein the auxiliary sample supply port is disposed at one end of the bonded insulating substrates, wherein said auxiliary sample supply port is a through-hole penetrating said one of the insulating substrates so as to leave a portion of the insulating substrate between the auxiliary sample supply port and the sample supply port, and is in fluid communication with outer air between the auxiliary sample supply port and the sample supply port, and wherein an entirety of the capillary between the auxiliary sample supply port and the air hole is covered by said one of the first insulating substrate and the second insulating substrate.