Moisture barrier composite film of silicon nitride and fluorocar

Chemistry: electrical current producing apparatus – product – and – With measuring – testing – or indicating means – For charge or liquid level

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324 7611, 324426, 324433, 324435, 428421, 428422, 428446, 428451, 429 90, 429 92, 429 93, G01R 19165, H01M 650, H01M 1048

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active

059254793

ABSTRACT:
A light transparent moisture barrier useful for preventing moisture from destroying the effectiveness of a moisture sensitive cell condition tester on an electrochemical cell, comprises a plurality of very thin layers of amorphous silicon nitride and a hydrophobic fluorocarbon polymer on a flexible, polymeric substrate. The layers are formed on the substrate by a deposition process such as sputtering. The thickness of any individual layer is less than one micron.

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