Patent ID: 7141416

Claim:
An optical bio-disc, comprising: a substantially circular substrate having a center and an outer edge; a metal layer in operable connection with the substrate; a target zone disposed between the center and the outer edge; an active layer formed on the surface of said metal layer; at least one capture agent that binds to said active layer such that the capture agent is immobilized on said active layer within the target zone to thereby form a capture zone, wherein the capture zone is located within the optical bio-disc; a first circumferential reservoir located near the outer edge of said substrate and extending around the periphery of said substrate; and a second circumferential reservoir located adjacent to and extending around an interior edge of the first circumferential reservoir, wherein the second circumferential reservoir is in fluid communication with the first circumferential reservoir through at least one port which extends through a common barrier between the first and second circumferential reservoirs, and wherein said common barrier physically and circumferentially supports a cap member placed on said substrate.