Abstract
In this paper the etching of Pyrex glass assisted by femtosecond pulses is reported. The process consists of 2 steps: (1) irradiating the glass by focused pulses from a femtosecond laser, (2) etching the glass in diluted HF (hydrofluoric acid) a solution. The glass can be modified without cracking by applying a femtosecond laser with a very low intensity. The etched depth of Pyrex glass increases from 12 to 131 μm with femtosecond laser irradiation from 0 to 1170 kJ/cm2, and etching in a 5% HF solution for 230 min. This technique provides an alternative way of achieving a high etching rate of Pyrex glass for applications to micro-electro-mechanical systems (MEMS), and of forming suspended structures on the surface of a Pyrex glass substrate by using modified glass as a sacrificial layer.
Original language | English |
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Pages (from-to) | 137-145 |
Number of pages | 9 |
Journal | Sensors and Materials |
Volume | 15 |
Issue number | 3 |
Publication status | Published - 2003 Jan 1 |
Keywords
- Etching
- Femtosecond laser
- Micromachining
- Modification
- Pyrex glass
ASJC Scopus subject areas
- Instrumentation
- Materials Science(all)