Method and Structure for Mandrel and Spacer Patterning

A method includes forming a first mandrel pattern and a second mandrel pattern. The first mandrel pattern includes at least first and second mandrels for a mandrel-spacer double patterning process. The second mandrel pattern includes at least a third mandrel inserted between the first and second man...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Peng, Chih-Hsiung, Fu, Shih-Chi, Chang, Chi-Kang, Wang, Chung-Ming, Chen, Kuei-Shun
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A method includes forming a first mandrel pattern and a second mandrel pattern. The first mandrel pattern includes at least first and second mandrels for a mandrel-spacer double patterning process. The second mandrel pattern includes at least a third mandrel inserted between the first and second mandrels. The first mandrel pattern and the second mandrel pattern include a same material. The first and second mandrels are merged together with the third mandrel to form a single pattern.