Why is high-purity helium the most ideal leak detection gas?

Helium, high-purity helium

Firstly, due to the fact that the external electron of high-purity helium gas is 2, and high-purity helium gas only has one layer of electrons, with the first layer being 2, this means that the structure is stable and the chemical properties of high-purity helium gas are relatively stable, making it less prone to reaction and explosion. High purity helium is used in some valuable devices for gas detection, such as airplanes and spacecraft. However, high-purity helium gas has limited reserves in nature and is relatively expensive. Therefore, in order to save costs, some companies choose a hydrogen nitrogen mixture as the leak detection gas or directly use nitrogen as the leak detection gas. To prevent performance degradation of semiconductor devices, integrated circuits, and other components due to impurities such as wastewater and steam, it is necessary to seal the casing.

Buy high-purity helium and find Wuhan Yisi Tuopu Technology Co., Ltd. Click on the online inquiry or call our hotline at+86 189 8614 9031.

High purity helium source manufacturer

However, due to various reasons, small holes that are difficult to find with the naked eye often appear in the sealing parts of the casing or lead connectors. Therefore, once the components are packaged, some methods must be taken to detect the presence of these small holes. High purity helium leak detection is the use of high-purity helium to inspect small holes on electronic component packaging. Due to the small size of high-purity helium atoms, it is easy to enter the shell through small holes. Therefore, this detection method can detect very small holes (that is to say, it can detect small holes with a leakage rate of about 1011~1012 cm3/sec). The sensitivity is comparable to the method of detecting radioactive leaks, but simpler than detecting radioactive leaks.

National distribution of high-purity helium gas

High purity helium leak detection method: First, place the packaged components into a container filled with high-purity helium gas, press it down, and let the high-purity helium gas enter the shell through the small hole; Then remove the high-purity helium gas remaining on the surface of the tube shell and blow it clean with compressed air; Then use a mass spectrometer to detect high-purity helium gas leakage on the surface of the tube shell.