Anhydrous HF processing as an alternative to HF/water processes

J. Staffa, P. Roman, K. Chang, K. Torek, Jerzy Ruzyllo

Research output: Contribution to journalConference article

Abstract

The HF/water treatment of silicon surfaces is among the most frequently applied steps in surface cleaning processes. It is utilized for clearing oxides from the silicon surface. Large amounts of ultrapure water are necessary to carry out this operation, both in the HF/water solution itself and the thorough rinse which must follow HF/water processes. Therefore, a gas-phase alternative to this process would significantly reduce deionized (DI) water consumption. The focus of this paper is the anhydrous hydrofluoric acid (AHF)/alcoholic solvent process which has shown promise as an alternative to the aqueous HF process. In particular, the AHF/methanol process has been studied extensively. This paper presents a comparison between properties of silicon surfaces prepared through the dilute HF/water (dHF) process and those of surfaces prepared through AHF/alcoholic solvent processes.

Original languageEnglish (US)
Pages (from-to)9-14
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume447
StatePublished - Jan 1 1997

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Hydrofluoric Acid
Hydrofluoric acid
Silicon
hydrofluoric acid
Water
Processing
water
Surface cleaning
silicon
water consumption
Deionized water
Water treatment
water treatment
clearing
Oxides
Methanol
Gases
cleaning
methyl alcohol
vapor phases

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Staffa, J., Roman, P., Chang, K., Torek, K., & Ruzyllo, J. (1997). Anhydrous HF processing as an alternative to HF/water processes. Materials Research Society Symposium - Proceedings, 447, 9-14.
Staffa, J. ; Roman, P. ; Chang, K. ; Torek, K. ; Ruzyllo, Jerzy. / Anhydrous HF processing as an alternative to HF/water processes. In: Materials Research Society Symposium - Proceedings. 1997 ; Vol. 447. pp. 9-14.
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Staffa, J, Roman, P, Chang, K, Torek, K & Ruzyllo, J 1997, 'Anhydrous HF processing as an alternative to HF/water processes', Materials Research Society Symposium - Proceedings, vol. 447, pp. 9-14.

Anhydrous HF processing as an alternative to HF/water processes. / Staffa, J.; Roman, P.; Chang, K.; Torek, K.; Ruzyllo, Jerzy.

In: Materials Research Society Symposium - Proceedings, Vol. 447, 01.01.1997, p. 9-14.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Anhydrous HF processing as an alternative to HF/water processes

AU - Staffa, J.

AU - Roman, P.

AU - Chang, K.

AU - Torek, K.

AU - Ruzyllo, Jerzy

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The HF/water treatment of silicon surfaces is among the most frequently applied steps in surface cleaning processes. It is utilized for clearing oxides from the silicon surface. Large amounts of ultrapure water are necessary to carry out this operation, both in the HF/water solution itself and the thorough rinse which must follow HF/water processes. Therefore, a gas-phase alternative to this process would significantly reduce deionized (DI) water consumption. The focus of this paper is the anhydrous hydrofluoric acid (AHF)/alcoholic solvent process which has shown promise as an alternative to the aqueous HF process. In particular, the AHF/methanol process has been studied extensively. This paper presents a comparison between properties of silicon surfaces prepared through the dilute HF/water (dHF) process and those of surfaces prepared through AHF/alcoholic solvent processes.

AB - The HF/water treatment of silicon surfaces is among the most frequently applied steps in surface cleaning processes. It is utilized for clearing oxides from the silicon surface. Large amounts of ultrapure water are necessary to carry out this operation, both in the HF/water solution itself and the thorough rinse which must follow HF/water processes. Therefore, a gas-phase alternative to this process would significantly reduce deionized (DI) water consumption. The focus of this paper is the anhydrous hydrofluoric acid (AHF)/alcoholic solvent process which has shown promise as an alternative to the aqueous HF process. In particular, the AHF/methanol process has been studied extensively. This paper presents a comparison between properties of silicon surfaces prepared through the dilute HF/water (dHF) process and those of surfaces prepared through AHF/alcoholic solvent processes.

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