Patent ID: 8398936

Claim:
A capillary pump unit comprising: an approximately flat-plate-shaped base substrate; an approximately flat-plate-shaped spacer portion formed on the approximately flat-plate-shaped base substrate, the approximately flat-plate-shaped spacer portion comprising a flow channel groove; an approximately flat-plate-shaped base formed on the approximately flat-plate-shaped spacer portion; a capillary pump comprising a plurality of through portions making a first point and a second point of the approximately flat-plate-shaped base communicable with each other, the capillary pump being formed in the approximately flat-plate-shaped base; and an inlet formed in the approximately flat-plate-shaped base, wherein the inlet distributes sample liquid to the plurality of through portions through the flow channel groove, and the sample liquid is transferred from the first point to the second point by capillary force by the plurality of through portions, wherein the base comprises a plurality of stacked sheet-shaped bases, and the plurality of through portions are formed in the respective sheet-shaped bases so that the through portions are communicable with one another among the sheet-shaped bases, and wherein the through portions are a plurality of through grooves provided in parallel with one another in the respective sheet-shaped bases, and the sheet-shaped bases are stacked so that the through grooves of adjacent ones of the sheet-shaped bases overlap in parallel with one another.