| abstract |
A method, apparatus, and computer program product, for forming annaddressable array (10) of chemical moieties on a substrate. The method may include,nfor each of multiple locations (16) on the substrate, depositing a reagent drop setnduring a cycle so as to attach a corresponding moiety for that location. This may benrepeated as required, until the addressable array (10) is formed. Test location (250)nare also formed by depositing drops from dispensers in a manner which can facilitatendetection of dispenser errors. |