Atomic diffusion bonding with oxide underlayers using Al and amorphous Si films for high optical density applications

Author:

Yonezawa GenORCID,Uomoto Miyuki,Shimatsu Takehito

Abstract

Abstract Atomic diffusion bonding with oxide underlayers using Al and a-Si films was examined to create a bonded interface with Al2O3 and Si-oxides having large band gaps for high optical density applications. Surface free energy of the bonded interface greater than 2 J m−2 and 100% light transmittance were achieved after annealing at 300 °C in the range of film thicknesses δ on both sides from 0.3 to 0.5 nm using Al films and with δ of around 0.5 nm using a-Si films. Structural analyses revealed that the bonded interface consists of Al2O3 and Si-oxides with oxygen dissociated from oxide underlayers.

Publisher

IOP Publishing

Subject

General Physics and Astronomy,Physics and Astronomy (miscellaneous),General Engineering

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