Patent attributes
The disclosed subject matter relates generally to methods of forming a semiconductor device, such as a moisture sensor. A plurality of electrodes and a bond pad are formed in a dielectric region. A passivation layer is formed on each electrode in the plurality of electrodes and the bond pad. A barrier layer is formed on the passivation layer. A plurality of trenches are formed to extend through the barrier layer and into the dielectric region. Formation of the trenches simultaneously exposes an upper surface of the bond pad. A moisture sensitive dielectric layer is formed on the barrier layer. Formation of the moisture sensitive dielectric layer also fills the trenches to form a plurality of projections, each projection being formed between two electrodes in the plurality of electrodes.
