Patent ID: 8953163
Filing Date: 2015-02-10
Classification: G03F

Abstract:
1. An exposure apparatus comprising: an exposure unit that irradiates exposure light to an original plate on which a mask pattern is formed to transfer a pattern corresponding to the mask pattern to a substrate; and a control unit that controls the exposure unit, wherein the exposure unit includes: an alignment data measuring unit that measures alignment data for the substrate; and a focus map measuring unit that measures a focus map of the substrate, the control unit includes an alignment correction value calculating unit that calculates an alignment correction value used when an upper-layer-side pattern is positioned relative to a lower-layer-side pattern of an exposure target substrate, which is a substrate to be exposed, on the basis of lower-layer-side position information about a position of the lower-layer-side pattern and upper-layer-side position information about a position of the upper-layer-side pattern which is transferred to the exposure target substrate, the lower-layer-side position information includes: lower layer alignment data which is alignment data measured when the lower-layer-side pattern is transferred; a lower layer focus map which is a focus map measured when the lower-layer-side pattern is transferred; and a lower layer correction value which is used when the lower-layer-side pattern is formed and is a correction value for the positioning that is set on the basis of a history of a positional deviation between a lower-layer-side pattern and an upper-layer-side pattern acquired from a substrate which is exposed earlier than the exposure target substrate, the upper-layer-side position information includes: upper layer alignment data which is alignment data measured by the alignment data measuring unit when the upper-layer-side pattern is transferred; an upper layer focus map which is a focus map measured by the focus map measuring unit when the upper-layer-side pattern is formed; and an upper layer correction value which is a correction value for the positioning and is used when the upper-layer-side pattern is transferred, and the control unit controls the positioning of the upper-layer-side pattern relative to the lower-layer-side pattern using the alignment correction value calculated by the alignment correction value calculating unit.