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Microchip

  • US 9,238,224 B2
  • Filed: 03/05/2010
  • Issued: 01/19/2016
  • Est. Priority Date: 05/15/2009
  • Status: Active Grant
First Claim
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1. A microchip comprising:

  • a plurality of resin substrates;

    a flow channel groove formed in a surface of at least one resin substrate of the plurality of resin substrates, the plurality of resin substrates being joined with a face facing inward where the flow channel groove is formed, and at least one resin substrate of the plurality of resin substrates having formed therein a through-hole of an almost circularly cross-sectional shape leading to the flow channel groove from a face of an opposite side to the face where the plurality of resin substrates are joined; and

    a protrusion, in the face of the opposite side, protruding in a thickness direction of the at least one resin substrate and integrally formed with the at least one resin substrate so as to surround the through-hole;

    wherein the microchip in which a space having an almost circularly cross-sectional shape concentric with the through-hole and a depth in the same direction as the thickness direction of the at least one resin substrate is formed on a joint face of the at least one resin substrate or another resin substrate of the plurality of resin substrates which is the joint face where the protrusion is projected from an almost perpendicular direction to the joint face;

    wherein, when a base end side edge of the through-hole is projected on the joint face from the almost perpendicular direction, a relationship of φ

    c>

    φ

    a is satisfied and a relationship of φ

    c≧

    φ

    b is satisfied, provided that a diameter of the base end side of the through-hole is designated as φ

    a, a diameter of the based end of the protrusion where the base end of the protrusion is projected on the joint face from the almost perpendicular direction is designated as φ

    b and a diameter of an end edge side of the space making contact with the joint face is designated as φ

    c;

    wherein the space is formed in the joint face of the plurality of resin substrates in which the flow channel groove has been formed in the at least one resin substrate of the plurality of resin substrates;

    wherein the space has a peripheral wall face slanting from the end edge side of the space toward the base end side edge of the through-hole or a tip side edge of the through-hole; and

    wherein the microchip further satisfies the relationship of T≦

    Tc≦

    Td, provided that the depth of the space is designated as Tc, the thickness of the at least one resin substrate is designated as T, and the depth of the through-hole is designated as Td, respectively.

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