Patent ID: 8416393

Claim:
A method of using a lithography system, comprising: providing a set of complementary aperture plates operable to image a layer of a substrate, wherein the set of complementary aperture plates includes: a first aperture operable to be incorporated in the lithography system, the first aperture having a first plate having a first pair of radiation-transmitting regions and a second pair of radiation-transmitting regions, wherein the first pair of radiation-transmitting regions are along a first diametrical axis and the second pair of radiation-transmitting regions are along a second diametrical axis, and wherein the first pair of radiation-transmitting regions are larger than the second pair of radiation-transmitting regions, wherein the first diametrical axis is different than the second diametrical axis; and a second aperture, complementary to the first aperture and operable to be incorporated in the lithography system, the second aperture having a second plate having a third pair of radiation-transmitting regions and a fourth pair of radiation-transmitting regions, wherein the third pair of radiation-transmitting regions are along a third diametrical axis and the fourth pair of radiation-transmitting regions are along a fourth diametrical axis, and wherein the third pair of radiation-transmitting regions are larger than the fourth pair of radiation-transmitting regions, wherein the third diametrical axis is different than the fourth diametrical axis; using the first aperture to expose a first pattern on the layer of the substrate; and thereafter using the second aperture to expose a second pattern on the layer of the substrate having the first pattern.