r words, a gas mixture including nitrogen and a noble gas, e.g. argon in accordance with an embodiment) at low pressure, for example at a pressure of less than 150 torr (200 mbar) in accordance with an embodiment, e.g. in a range from approximately 0.1 torr to approximately 40 torr in accordance with an embodiment, e.g. approximately 1 torr in accordance with an embodiment . [ 0082 ] In accordance