Laser-induced etching of polycrystalline Al2O3TiC in KOH aqueous solution

Y. F. Lu, K. D. Ye

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Laser-induced etching of polycrystalline Al2O3TiC material by a tightly-focused cw Ar ion laser has been investigated in a KOH solution with different concentrations. It is found that the KOH concentration can strongly affect the etching quality where low KOH concentration can result in rough and irregular patterns. Laser-induced etching of polycrystalline Al2O3TiC in a KOH solution is found to be a photothermal reaction in which a threshold laser power exists. With an appropriate set of etching parameters, well-defined grooves can be obtained with clean side walls and with an etching rate up to several hundred micrometers per second. The etching behavior is also found to depend on laser scanning direction. It is also found that the grains in the polycrystalline Al2O3TiC material play an important role in the etching dynamics and etching quality. This etching process is believed to be applicable to the formation of a slider surface of magnetic heads in the future.

Original languageEnglish (US)
Pages (from-to)43-49
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Issue number1
StatePublished - Jan 1996
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science


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