Back to results
US 6,620,478 B1Granted
Circular disk containing microchannel/microcavity structures
AssigneeGyros AB
InventorOve Öhman
Life of this patent
Estimating the term…
Abstract
The present invention relates to a circular disk, comprising two material layers that are joined together, wherein said disk contains microfluidic structures formed of a channel and/or cavity system defined between the two material layers, the recesses which correspond to the channels and/or cavities, respectively, being formed in one or both of opposed layer surfaces.
Claims7
A circular disk, comprising:
- two material layers that are joined together, wherein said disk contains microfluidic structures formed of a channel and/or cavity system defined between the two material layers, the recesses which correspond to the channels and/or cavities, respectively, being formed in one or both of opposed layer surfaces, wherein said material layers are joined together to form said disk substantially without obstructing the channel and/or cavity system, wherein at least one of said material layers is thermoplastic, and wherein said two material layers are joined together by an intermediate thermoplastic layer.
A circular disk, comprising:
- a first circular element;
- a second circular element;
- and
- an intermediate thermoplastic layer between said first circular element and said second circular element, wherein
- (a) said first and second elements are planar;
- (b) said first and second circular elements are joined together to form said disk,
- (c) said disk contains microfluidic structures formed of a channel and/or cavity system defined between the first and second circular elements,
- (d) recesses which correspond to the channels and/or cavities, respectively, are formed in one or both of opposed layer surfaces of said first and second circular elements,
- (e) said first and second elements are joined together by said intermediate thermoplastic layer, and
- (f) said first and second elements are joined together by the method comprising:
- (i) applying to the surface of one or both of said first and second circular elements a thin layer of a solution of dissolved thermoplastic material capable of fusing with, and having a lower melting point than that of the material or materials of the two element surfaces in a solvent which substantially does not dissolve the element surface material or materials;
- (ii) removing the solvent;
- (iii)bringing said surfaces of said first and second elements together to define a closed microchannel and/or microcavity system between them;
- and
- (iv) heating to a temperature where the dissolved thermoplastic material is caused to melt but not the element surface material or materials to bond said first and second elements together, whereby the first and second elements are bonded together substantially without obstructing the microchannel and/or microcavity system.
12 more elements
A circular disk, comprising:
- two material layers that are joined together, wherein said disk contains microfluidic structures formed of a channel and/or cavity system defined between the two material layers, the recesses which correspond to the channels and/or cavities, respectively, being formed in one or both of opposed layer surfaces, wherein said material layers are joined together to form said disk substantially without obstructing the channel and/or cavity system, and wherein said two material layers are joined together by an intermediate thermoplastic layer.
Dependencies are inferred from the claim text.