Patent ID: 9452431
Filing Date: 2016-09-27
CPC Classification: B01L

Claim Text:
1. A chemical assay device comprising: a first hydrophilic substrate, the first hydrophilic substrate having a first side and a second side, a predetermined length and width, and a thickness of not more than 1 millimeter; a first hydrophobic structure formed in the first hydrophilic substrate from a hydrophobic material, the hydrophobic material being selected from a group consisting of a wax and a phase change ink, and the first hydrophobic structure penetrating through substantially the thickness of the first hydrophilic substrate from the first side to the second side, the first hydrophobic structure forming a fluid barrier wall in the first hydrophilic substrate with a surface of the fluid barrier wall extending through the thickness of the first hydrophilic substrate with a deviation from perpendicular of less than 20° from the first side and second side of the first hydrophilic substrate; a second hydrophilic substrate having a first side and a second side, the first side of the second hydrophilic substrate engaging the second side of the first hydrophilic substrate, and the second hydrophilic substrate having another predetermined length, width, and thickness of not more than 1 millimeter; and a second hydrophobic structure formed in the second hydrophilic substrate and the first hydrophilic substrate to bond the first hydrophilic substrate and the second hydrophilic substrate together, the hydrophobic material in the second hydrophobic structure extending from a second arrangement of the hydrophobic material formed on only the first side of the second hydrophilic substrate and penetrating both the first hydrophilic substrate and the second hydrophilic substrate.