Patent ID: 6356337
Filing Date: 2002-03-12
Classification: G03B,G03F,H05K

Abstract:
A method of repetitive two-sided mask patterning of substrate panels, each having obverse and reverse surfaces, using loading means, unloading means, and means for inverting a substrate panel taken directly from a substrate chuck on a carriage and forwarding it directly to a substrate chuck on said carriage, and having a reverse patterning station, an obverse patterning station and at least one mask station, each station mounted upon the traveling carriage of a precision X-Y stage which is operable to provide scanning motion with respect to projection optics, characterized by the following steps:a first step of unloading a both-side-patterned substrate panel from the obverse patterning station; a second step of flipping a reverse-side-patterned substrate panel for obverse presentation; a third step of forwarding a flipped reverse-side-patterned substrate panel to the obverse patterning station; a fourth step of loading a blank substrate panel into the reverse patterning station; a fifth step of scanning the flipped reverse-side-patterned substrate panel at the obverse patterning station and scanning the blank substrate panel at the reverse-patterning station; and then repeating the first step to the fifth step until all substrates have been patterned on both obverse and reverse surfaces.