Lithographic apparatus and device manufacturing method with double exposure overlay control

A device manufacturing method includes a transfer of a pattern from a patterning device onto a substrate. The device manufacturing method further includes transferring a pattern of a main mark to a base layer for forming an alignment mark; depositing a pattern receiving layer on the base layer; in a...

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Bibliographische Detailangaben
Hauptverfasser: SCHAAR MAURITS V.D, FRANCISCUS VAN HAREN RICHARD J
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A device manufacturing method includes a transfer of a pattern from a patterning device onto a substrate. The device manufacturing method further includes transferring a pattern of a main mark to a base layer for forming an alignment mark; depositing a pattern receiving layer on the base layer; in a first lithographic process, aligning, by using the main mark, a first mask that includes a first pattern and a local mark pattern, and transferring the first pattern and the local mark pattern to the pattern receiving layer; aligning, by using the local mark pattern, a second mask including a second pattern relative to the pattern receiving layer; and in a second lithographic process, transferring the second pattern to the pattern receiving layer; the first and second patterns being configured to form an assembled pattern.