A radiation imager is disclosed that is resistant to degradation due to moisture by either contact pad corrosion, guard ring corrosion or by photodiode leakage. A contact pad of a large area imager is disclosed that is formed into three distinct and electrically connected regions. The resulting structure...http://www.google.se/patents/US6225212?utm_source=gb-gplus-sharePatent US6225212 - Corrosion resistant imager
