Patent ID: 8604435

Claim:
An apparatus comprising: an integrated circuit (IC) that is configured to detect infrared radiation, wherein the IC includes: a substrate having a first side and an opposite second side; a dielectric stack formed over a first side of the substrate; a passivation layer formed over the dielectric stack; a channel that extends through the passivation layer and the-dielectric stack; a cavity formed in the substrate by the introduction of an etchant through the channel, wherein the cavity underlies at least a portion of the dielectric stack; a roll-on epoxy film cap layer formed over the passivation layer, and wherein the cap layer seals the channel; and a plurality of bond pads formed on the first side of the substrate, wherein at least one of the bond pads is coupled to the dielectric stack; and a circuit board having a plurality of conductive bumps, wherein each conductive bump is secured to and in electrical contact with at least one of the bond pad so that the infrared radiation is received by the IC at the second side of the substrate.