Patent ID: 7846716

Claim:
A microchip for analyzing liquid samples, comprising: a measuring structure comprising a first fluid channel provided on the chip body; a second fluid channel in communication with the first fluid channel at one end of the second fluid channel; a third fluid channel in communication with the other end of the second fluid channel; and further comprising an agitation port at one end of the first fluid channel of the measuring structure and an absorption port at the other end of the first fluid channel of the measuring structure, wherein: the perimeter and the cross-sectional area of the vicinity of an opening of the first fluid channel in communication with the second fluid channel are designated as L 1 and S 1 , respectively, and the perimeter and the cross-sectional area of a first opening of the second fluid channel in communication with the first fluid channel are designated as L 2 and S 2 , respectively, and (L 1 /S 1 )<(L 2 /S 2 ).