Fixed pattern noise in the solid-state imagers due to the striations in Czochralski silicon crystals

Abstract
The concentric circle pattern of growth striations in Czochralski (CZ) silicon wafer has been found to cause the fixed pattern noise in the reproduced image by solid-state imagers with the p-well structure. The microgrowth striations of dopant impurities in 4-in. n-type CZ silicon wafers have been examined in terms of noise video signals of p-well Charge Priming Device imagers. Striation periods as narrow as 10 μm can be revealed, which may be overlooked by the conventional spreading resistance method.