Patent ID: 7432110

Claim:
A microchannel array containing a first substrate, and a second substrate bonded to the first substrate with a particle trap opening edge being formed in an front end surface of the first substrate by a groove formed in a bond surface of the first substrate, comprising: (a) a first through-hole passed through the first substrate, a first recess including the first through-hole, and a plurality of first grooves communicating with the first recess and the front end surface of the first substrate, wherein each of the first grooves are split by a boundary block partition stretching along the first groove; (b) a second through-hole passed through the first substrate, a second recess having the second through-hole, and a second groove communicating with the second recess and the front end surface of the first substrate, wherein the second groove comprises the second recess and the second through-hole at one end with the second end being in the vicinity of the front end surface of the first substrate; and (c) a second partition separating the first recess from the second recess, at the bond surface of the first substrate, wherein the second groove is formed between the plurality of adjacent first grooves with the second partition between the second groove and the first grooves, and wherein the first through-hole is spatially separated from the plurality of the first grooves and the second groove, and is located in the rear end surface of the first substrate and the second through-hole is located between the first through-hole and the front end surface of the first substrate.