Nitrogen trifluoride

[6] NF3 is a greenhouse gas, with a global warming potential (GWP) 17,200 times greater than that of CO2 when compared over a 100-year period.

[6] It oxidizes hydrogen chloride to chlorine:[citation needed] However, it only attacks (explosively) organic compounds at high temperatures.

[15][16] Nitrogen trifluoride is primarily used to remove silicon and silicon-compounds during the manufacturing of semiconductor devices such as LCD displays, some thin-film solar cells, and other microelectronics.

The greater abundance of negatively-charged free radicals thus generated can yield higher silicon removal rates, and provide other process benefits such as less residual contamination and a lower net charge stress on the device being fabricated.

[17] The utilization efficiency of the chemicals applied in plasma processes varies widely between equipment and applications.

The annual reporting of NF3 production, consumption, and waste emissions by large manufacturers has been required in many industrialized countries as a response to the observed atmospheric growth and the international Kyoto Protocol.

[23][24] Robson projected that the maximum atmospheric concentration is less than 0.16 parts per trillion (ppt) by volume, which will provide less than 0.001 Wm−2 of IR forcing.

This is a significantly higher percentage than has been estimated by industry, and thus strengthens the case for inventorying NF3 production and for regulating its emissions.

[26] One study co-authored by industry representatives suggests that the contribution of the NF3 emissions to the overall greenhouse gas budget of thin-film Si-solar cell manufacturing is clear.

It is a pulmonary irritant with a toxicity considerably lower than nitrogen oxides, and overexposure via inhalation causes the conversion of hemoglobin in blood to methemoglobin, which can lead to the condition methemoglobinemia.

Nitrogen trifluoride
Nitrogen trifluoride
Nitrogen trifluoride
Nitrogen trifluoride
NFPA 704 four-colored diamond Health 1: Exposure would cause irritation but only minor residual injury. E.g. turpentine Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazard OX: Oxidizer. E.g. potassium perchlorate
Growth in atmospheric concentration of NF 3 since the 1990s is shown in right graph, along with a subset of similar man-made gases. Note the log scale. [ 21 ]
Nitrogen trifluoride concentration at several latitudes since 2015. [ 22 ]
NF3 measured by the Advanced Global Atmospheric Gases Experiment ( AGAGE ) in the lower atmosphere ( troposphere ) at stations around the world. Abundances are given as pollution free monthly mean mole fractions in parts-per-trillion .