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Definition of "Hermetic Seal" |
A hermetic seal results from fusing metal-to-metal, ceramic-to-metal, or glass-to-metal only. Hermetic sealing is the process by which an item is totally enclosed by a suitable metal structure or case by fusion of metallic or ceramic materials. This includes the fusion of metals by welding,brazing, or soldering; the fusion of ceramic materials under heat or pressure; and the fusion of ceramic material on to a metallic support. An air-tight seal. / a seal that is such that the object is gas-tight (usually a rate of less than 1 × 10^−6 cc/s of helium). |
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