200 mm wafer-scale substrate transfer of 0.13 μm Cu/low-k (Black Diamond™) dual-damascene interconnection to glass substrates

Teh, W. H.; Kumar, R.; Kwong, D. L.
July 2005
Applied Physics Letters;7/25/2005, Vol. 87 Issue 4, p043103
Academic Journal
We report a low-temperature (350 °C) pulsed-voltage anodic bonding followed by grind/etch-back method for 200 mm wafer-scale substrate transfer of 0.13 μm Cu/low-k (Black Diamond™) dual-damascene interconnection to glass substrates. Standard back-end-of-line (BEOL) 3 kÅ SiN/3 kÅ undoped Si glass passivating films were used as buffer layers between donor wafer and glass wafer to facilitate the bonding. We demonstrate removal of the silicon bulk layer to leave behind a transparent (∼1.25 μm thick) 0.13 μm BEOL circuit on a 1-mm-thick glass wafer. The quality of the mechanical and electrical integrity of the deep submicron BEOL circuit is confirmed by focused ion beam-scanning electron microscopy microscopy and I-V characterization on via chain test structures. This technique has potential applications for bioelectronics and optoelectronics integration schemes.


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