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|Title:||Electrochemical anodization of silicon-on-insulator wafers using an AC|
|Authors:||Breese, M.B.H. |
|Source:||Breese, M.B.H., Azimi, S., Ow, Y.S., Mangaiyarkarasi, D., Chan, T.K., Jiao, S., Dang, Z.Y., Blackwood, D.J. (2010). Electrochemical anodization of silicon-on-insulator wafers using an AC. Electrochemical and Solid-State Letters 13 (8) : H271-H273. ScholarBank@NUS Repository. https://doi.org/10.1149/1.3431038|
|Abstract:||Electrochemical anodization of bulk silicon has applications in many micromachining processes. However, its use for silicon photonics is limited because silicon-on-insulator (SOI) wafers cannot be anodized using a conventional process because of the buried oxide. We overcome this using an alternating potential to induce an ac across an SOI wafer, treating it as a capacitative structure. The resultant surface roughness is comparable to that obtained using conventional anodization, and uniform etching across a 6 mm exposed surface is obtained with a minimum patterned linewidth of 2.5 μm in the device layer. © 2010 The Electrochemical Society.|
|Source Title:||Electrochemical and Solid-State Letters|
|Appears in Collections:||Staff Publications|
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