Patent ID: 7175811

Claim:
A biosensor comprising: a top outer layer containing at least one fluid port; a fluidics layer below said top outer layer containing at least one fluidics channel in fluid communication with said fluid port; a waveguide device below said fluidics layer, wherein said waveguide device comprises: a) a first cladding layer below said fluidics layer containing at least one micro-cuvette in fluid communication with said fluidics channel; b) a waveguide core layer below said first cladding layer containing at least one channel waveguide core in contact with said micro-cuvette; c) a second cladding layer below said waveguide core layer in contact with said waveguide core; an excitation light source optically coupled into said waveguide core layer; whereby, fluid containing samples having target molecules and optical tags placed in said fluid port is transferred by said fluidics channel into said micro-cuvette where light from said excitation light source enters said micro-cuvette by means of an evanescent wave in said first cladding layer exciting any of said optical tags binding to said target molecules in said micro-cuvette.