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|Title:||Defect-free wet etching through pyrex glass using Cr/Au mask|
|Authors:||Tay, F.E.H. |
|Source:||Tay, F.E.H., Iliescu, C., Jing, J., Miao, J. (2006-09). Defect-free wet etching through pyrex glass using Cr/Au mask. Microsystem Technologies 12 (10-11) : 935-939. ScholarBank@NUS Repository. https://doi.org/10.1007/s00542-006-0116-0|
|Abstract:||This paper reports the highest etch depth of annealed Pyrex glass achieved by wet etching in highly concentrated HF solution, using a low stress chromium-gold with assistance of photoresist as masking layer. The strategies to achieve that are: increasing the etch rate of glass and simultaneously increasing the resistance of Cr/Au mask in the etchant. By annealing the Pyrex glass and using a highly concentrated HF acid, a high etch rate can be obtained. Furthermore, a method to achieve a good resistance of the Cr/Au masking layer in the etching solution is to control the residual stress and to increase the thickness of Au deposition up to 1 μm. In addition, the presence of a hard baked photoresist can improve the etching performance. As a result, a 500-μm thick Pyrex glass wafer was etched through.|
|Source Title:||Microsystem Technologies|
|Appears in Collections:||Staff Publications|
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