Fluidic device, testing device, and method for fabricating fluidic device

• US 9,500,647 B2
• Filed: 09/19/2014
• Issued: 11/22/2016
• Est. Priority Date: 09/19/2013
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Kobayashi, Rie
• Primary Examiner(s): Wecker, Jennifer
• Application Number:
  US14/491,415
• Publication Number:
  US 20150079668A1
• Time in Patent Office: 795 Days
• US Class Current: 1/1
• CPC Class Codes: B01D 15/3804 Affinity chromatography
• CPC Class Codes: B01L 2200/12 Specific details about manufacturing devices
• CPC Class Codes: B01L 2300/0654 Lenses; Optical fibres
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2300/126 Paper
• CPC Class Codes: B01L 2300/16 Surface properties and coatings
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: G01N 30/02 Column chromatography
• CPC Class Codes: G01N 30/6047 with supporting means; Holders
• CPC Class Codes: G01N 30/92 Construction of the plate
• CPC Class Codes: G01N 33/558 using diffusion or migration of antigen or antibody immunochromatographic test strips G01N33/54387
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

Provided is a fluidic device including: a support member; a porous layer; and an adhesive layer bonding the support member and the porous layer with each other. A partition wall made of a thermoplastic material is formed in the porous layer. The support member has a heatproof temperature that is higher than a melting start temperature of the thermoplastic material.

Claims

1. A fluidic device, comprising:

a support member;

a porous layer; and

an adhesive layer bonding the support member and the porous layer with each other,

wherein a partition wall made of a thermoplastic material is formed in the porous layer so that a part of the porous layer includes pores filled with the thermoplastic material, and

wherein the support member has a heatproof temperature that is higher than a melting start temperature of the thermoplastic material.

2. The fluidic device according to claim 1,

wherein the heatproof temperature of the support member is 180°

C. or higher.

3. The fluidic device according to claim 1,

wherein the adhesive layer is a hydrophobic thermoplastic material.

4. The fluidic device according to claim 1,

wherein the support member is a sheet of paper covered with a hydrophobic film.

5. The fluidic device according to claim 1,

wherein a viscous layer is provided over a side of the support member opposite to a side thereof contacting the adhesive layer.

6. The fluidic device according to claim 5,

wherein the viscous layer has a viscosity of from 2 N/20 mm to 10 N/20 mm.

7. The fluidic device according to claim 1,

wherein the support member has a basis weight of 170 g/m² or greater.

8. A testing device, comprising:

the fluidic device according to claim 1,

wherein a reagent reactive with an analyte is placed over the porous layer.

9. The fluidic device according to claim 1, wherein the part of the porous layer that includes the pores filled with the thermoplastic material is hydrophobized, and another part of the porous layer is not hydrophobized.