Glass etching assisted by femtosecond pulse modification

Chienliu Chang, Takashi Abe, Masayoshi Esashi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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 languageEnglish
Pages (from-to)137-145
Number of pages9
JournalSensors and Materials
Issue number3
Publication statusPublished - 2003 Jan 1


  • Etching
  • Femtosecond laser
  • Micromachining
  • Modification
  • Pyrex glass

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)


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