1. Void formation in pulsed laser induced via/contact hole filling.
- Author
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Marella, Paul F., Tuckerman, David B., and Pease, R. Fabian
- Subjects
- *
PULSED laser deposition , *PHYSICS - Abstract
Metal (Au, Cu, and Al-1% Cu) layers sputter deposited over vias and contact holes of varying diameter and aspect ratio are melted and planarized by irradiation with either a 600 ns pulse duration flashlamp-pumped dye laser or a 35 ns pulse duration excimer laser. High aspect ratio (>=1) vias and contact holes yield metal profiles that suffer from void formation during the laser-induced flow. This void formation is explained by considering surface tension forces that, in high aspect ratio cases, act to close off the top of a hole without filling it. [ABSTRACT FROM AUTHOR]
- Published
- 1990
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