Gettering effect inside the glass packaged FED panel

High vacuum sealing is one of the most challenging technologies in commercializing FEDs. We have tried to package a Si FEA or a Mo FEA on Si substrate with 0.7inch diagonal by using a soldering method. In this paper, we have evaluated the vacuum level inside the FED panel, which determines the performance of FED, by measuring the emission currents during packaging and comparing it with the calibrated values measured in a test chamber. We evaluate that a getter plays a role of in-situ mini pump during the life of the sealed FED.