Patent ID: 7559619

Claim:
A digital lithography system including real-time quality control of printed features formed on a substrate, the system comprising: a first droplet source for selectively ejecting liquid droplets of a phase change material; a digital control system for positioning the first droplet source over a predetermined substrate location on a surface of the substrate, and for controlling the first droplet source to selectively eject a plurality of first liquid droplets in accordance with predetermined printing data such that the ejected first liquid droplets form at least part of a printed feature located at the predetermined substrate location; an imaging system for generating an image data portion representing the part of the printed feature formed by the ejected first liquid droplets at the predetermined substrate location, wherein the imaging system is fixedly attached to the first droplet source such that movement of first droplet source results in parallel movement of the imaging system, and wherein said digital control system includes means for comparing each image data portion with stored image data, and means for modifying the printed feature in response to said comparing process.