Helium Leak Test Probes for Gas Discharge Panels
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20
In the fabrication of gaseous discharge display panels, two glass plates having dielectrically coated conductor areas formed thereon are edge sealed, evacuated and filled with a neon-argon gas mixture through a tubulation member, which is then permanently sealed. One problem associated with such devices is a potential for gas leakage, and the leakage problem varies substantially as the size of the panel. The state of the art of leak testing of gaseous discharge display panels is to retubulate the panel and test with a mass spectrometer. The entire panel is sealed in a heavy metal chamber, whereby the exterior portion of the panel is pressurized with helium while the mass spectrometer scans the interior of the panel for helium.