Patent ID: 9032342
Filing Date: 2015-05-12
Classification: G03F,H05K

Abstract:
1. A method of patterning a plurality of layers of a workpiece in a series of writing cycles in at least one write machine, the workpiece having N+2 (N>1) layers, and the N+2 layers having at least one boundary condition for pattern position locally and globally in relation to a reference, the method comprising: a. Receiving a priori information regarding boundary conditions of layers 1 and N+2; b. Calculating a deviation between a perfect fit between a pattern of layer 1 and a pattern of layer N+2 due to the boundary conditions; c. Distributing the deviation between layers 2 to N+1 by assigning a selectable part of the deviation to each respective layer; d. Writing a first layer according to the boundary condition of layer 1; e. Aligning a subsequent pattern, which is currently being written, the aligning the subsequent pattern including calculating a transformation for fitting the subsequent pattern to the first layer; f. Adding the assigned deviation for a subsequent layer to the calculated transformation to obtain an adjusted transformation; g. Adjusting the subsequent pattern according to the adjusted transformation; h. Verifying that said adjusted subsequent pattern is within alignment tolerances for the subsequent layer; i. Writing said adjusted subsequent pattern on said first layer if said adjusted subsequent pattern is within the alignment tolerances for the subsequent layer; j. Repeating e-i for the N+1 layers; and k. Writing the N+2 layer according to the boundary condition of layer N+2.