Patent ID: 7997680
Filing Date: 2011-08-16
Classification: H01L,H05K

Abstract:
1. A method for forming a printed pattern from a pattern layout using a printing system, the printing system comprising a print head including a plurality of ejectors and a camera rigidly connected to the print head, the camera having an imaging sensor including an alignment target, the method comprising: performing a first alignment operation to achieve a specified orientation between the print head and a first set of alignment marks on a substrate using first image data generated by the imaging sensor of the camera; performing a first print operation after the first alignment operation to print a first portion of the pattern layout on the substrate to generate a first portion of the printed pattern, wherein performing the first print operation includes making a plurality of printing passes across the substrate in a first print direction; performing a second alignment operation to orient the print head relative to a second set of alignment marks on the substrate using second image data generated by the imaging sensor of the camera; and performing a second print operation to print a second portion of the pattern layout on the substrate to generate a second portion of the printed pattern, wherein performing the second print operation includes making a plurality of printing passes across the substrate in a second print direction that is non-parallel to the first print direction, wherein the imaging sensor of the camera comprises an alignment target, and wherein performing the first alignment operation comprises: