Hydrophobic Barriers

• US 20070059216A1
• Filed: 11/02/2006
• Published: 03/15/2007
• Est. Priority Date: 05/12/2000
• Status: Abandoned Application

• Current Assignee: Gyros Patent AB (Mesa Laboratories Inc.)
• Original Assignee: Gyros Patent AB (Mesa Laboratories Inc.)
• Inventors: Larsson, Olle, Tiensuu, Anna-Lisa
• Application Number:
  US11/555,690
• Publication Number:
  US 20070059216A1
• Time in Patent Office: Days
• US Class Current: 422/100
• CPC Class Codes: B01L 2200/12 Specific details about manufacturing devices
• CPC Class Codes: B01L 2300/161 Control and use of surface tension forces, e.g. hydrophobic, hydrophilic
• CPC Class Codes: B01L 2400/0688 surface tension valves, capillary stop, capillary break
• CPC Class Codes: B01L 3/502746 characterised by the means for controlling flow resistance, e.g. flow controllers, baffles B01L3/502738 takes precedence

Abstract

The present invention relates to microchannels (1) in a substrate (5) wherein said microchannels has an internal surface (7, 9, 11) that in a region (15), adapted for distributing fluid, has one or more grooves (17, 27,37, 47, 57, 77) and/or one or more abutting projections (59, 69, 79) which extend at least partly from the bottom of the microchannel to the top of the microchannel.

Claims

1-14. -14. (canceled)

15. A method for locally modifying internal surfaces of a microchannel comprising the step of using a technique selected from printing and stamping techniques for carrying out the modifying.

16. The method of claim 15, wherein said technique is selected from ink-jet techniques.

17. The method of claim 15, wherein the local modification is hydrophobic.

18. The method of claim 16, wherein the local modification is hydrophobic.

19. The method of claim 15, wherein the surfaces to be modified comprises irregularities in the form of grooves or projections.

20. The method of claim 16, wherein the surfaces to be modified comprises irregularities in the form of grooves and projections.

21. The method of claim 17, wherein the surfaces to be modified comprises irregularities in the form of grooves or projections.

22. The method of claim 18, wherein the surfaces to be modified comprises irregularities in the form of grooves or projections.

23. The method of claim 18, wherein the surfaces to be modified comprises irregularities in the form of grooves and projections.