Patent ID: 8303908

Claim:
An analyzing tool comprising: a substrate; a cover joined to the substrate; a liquid inlet formed in the cover and provided at a central portion; a plurality of individual channels formed in the substrate and communicating with the liquid inlet for moving a sample liquid introduced through the liquid inlet by capillary action from the central portion toward a peripheral portion of the tool; a common channel formed in the substrate, provided at the peripheral portion of the tool and communicating with the plurality of individual channels; a plurality of first gas exhaust holes formed in the cover; a plurality of first seals provided on the cover for closing the first gas exhaust holes, respectively, the first seals being breakable; a second gas exhaust hole formed in the cover; and a second seal provided on the cover for closing the second gas exhaust hole, the second seal being breakable; wherein each individual channel includes a reaction site and a branch offset from the reaction site toward the liquid inlet, the branch communicating with a corresponding one of the plurality of first gas exhaust holes, and wherein the common channel communicates with the second gas exhaust hole.