Zyron

Freon was used as the original brand name for electronic gases produced and marketed by DuPont. With the depletion of the ozone layer and the subsequent phase-out of chlorofluorocarbon (CFC) gas compounds, the company rebranded this product line to differentiate from refrigerant gases that had been using the same Freon brand name.

The name was developed in October 1991 by DuPont employees Paul Bechly and Dr. Nicholas Nazarenko,{{Citation needed|date=March 2025}} was first used in commerce on June 12, 1992, and became a registered trademark of DuPont in 1993.[http://trademarks.justia.com/742/34/zyron-74234421.html USPTO Trademark Registration # 1772141]

The Zyron product naming system was also developed by Bechly and Nazarenko in October 1991. The system is based upon the historical industry numbering system for fluorinated alkanes[http://www.epa.gov/ozone/geninfo/numbers.html Numbering Scheme for Ozone-Depleting Substances and their Substitutes] to identify the chemical compound, followed by an (N) suffix component that specified product purity. The naming system was intentionally not trademarked to allow for industrial adoption.

As example for Zyron 116 N5: the 116 represents the compound hexafluoroethane, and N5 represents "5 nines" or 99.999% purity.

As example for Zyron 23 N3 the 23 represents the compound trifluoromethane, and N3 represents "3 nine" or 99.99% purity.

Zyron 116 N5 (hexafluoroethane)

Zyron 318 N4 (octafluorocyclobutane)

Zyron 23 N5 (trifluoromethane)

Zyron 23 N3 (trifluoromethane)

Historical products included: Zyron 14 (tetrafluoromethane), Zyron 32 (difluoromethane), Zyron 125 (pentafluoroethane), and Zyron NF3 (nitrogen trifluoride).

The primary applications of these gases for the electronics industry are for etching of silicon wafer, and cleaning of chemical vapor deposition chamber tools.[http://www2.dupont.com/Zyron/en_US/assets/downloads/pdf/Zyron_salessheet.pdf DuPont Zyron Electronic Gases for Plasma Process Applications] These are all plasma-based product applications where the product is essentially destroyed in use.

Alternative products to the Zyron line for various application in electronics include the chemical compounds HCl, BCl₃, CF₄, ClF₃, CH₂F₂, Ge_H4, C₄F₆, NF₃, C₅F₈, PH₃, C₃H₆, SiH₄, and WF₆.[http://www.airproducts.com/products/Gases/Specialty-Gases/Silicon-Semiconductors.aspx Air Products listing of specialty gases for the Semiconductor Industry]

• [http://www.icis.com/Articles/1999/11/01/98077/zyron-expansion.html Zyron expansion announcement (1999)]
• [http://www.icis.com/Articles/2001/03/19/134629/dupont-ups-specialty-gas-capacity-fueled-by-electronics.html Zyron 2nd expansion announcement (2001)]
• [http://business.highbeam.com/4015/article-1G1-89156966/dupont-adds-new-gas-product Zyron NF3 announcement (2002)]{{dead link|date=January 2025|bot=medic}}{{cbignore|bot=medic}}
• [https://web.archive.org/web/20111111222647/http://nema.org/media/ind/20070720a.cfm Zyron team award announcement (2007)]
• [http://www.manufacturing.net/news/2010/11/dupont-technology-innovations-showcased-at-Semicon Semicon Taiwan announcement (2010)]

• Semiconductor device fabrication
• Fluorocarbons
• Perfluorinated compound
• Greenhouse gas
• Global warming

{{Reflist}}

• [http://www2.dupont.com/Zyron/en_US/index.html DuPont Zyron website]
• [http://www.sia-online.org Semiconductor Industry Association]
• [http://unfccc.int/2860.php United Nations Framework Convention on Climate Change]
• [http://findingaids.hagley.org/xtf/view?docId=ead/2723.xml Paul L Bechly papers (Accession 2723), Hagley Museum and Library]

Category:Brand name materials

Category:Organofluorides

Category:Semiconductor device fabrication