Seam sealing or seam welding, is a variation of resistance spot welding. It is most often used to join the lids to the cans of electronic packages. The process utilizes two motor-driven electrode wheels which are positioned on opposite sides of the package to be sealed and rolled along the perimeter and conduct current through both components to create the seal.
Hermetic sealing is a variation of this joining process. It results in a closed package completely sealed against ambient atmosphere, preventing the entry or escape of air. The process is most often used in the manufacture of electronic devices. Part design and fit-up is critical in these applications to create hermetic seals.
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