This type of kovar lids are designed specifically to seal packages containing heat sensitive electronics.
SeamSeal-Lids™ are also know as an Electroless Ni Lids
Composition:
Base material A-42 or kovar lids, plated with 50-200 micro inches of Electroless Ni. A variety of Phosphorous levels are available; Low 1-4% semi bright deposit, Mid 3-9% very bright deposit, and High 10.5-12 dull deposit. Corrosion resistance increases as Phosphorous level increases.
Williams offers SeamSeal-Lids TM in a variety of sizes and configurations to meet your needs. We have a large library of available tools built specifically to stamp kovar lids. Typical dimensions for the lids range from .250 square to .060 square.
The above description is of our standard products. Plating properties can be modified to meet specific needs.
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