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US 7,923,390 B2Granted
Electrical shielding material composed of metalized stainless steel monofilament yarn
AssigneeMicrometal Technologies, Inc.
InventorsThomas F. Burke, James E. Haller
Life of this patent
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Abstract
A yarn or multi-fiber formed of a plurality of micron diameter stainless steel monofilaments which have been rendered more conductive by one or more coatings of electrolytically-deposited metal or metal alloy materials. The metallized yarn provided by the invention has a very low electrical resistance, with consequent benefit in electrical performance, and is particularly useful as an RFI/EMI shielding material.
Claims28
An RFI/EMI shielding material comprising:
- a conductive yarn having a plurality of monofilaments each including:
- a stainless steel monofilament;
- a first electroplated layer of a first metal or metal alloy completely and substantially uniformly electroplated on the stainless steel monofilament;
- a second electroplated layer of a second metal or metal alloy completely and substantially uniformly electroplated on the first electroplated layer and having an electrical resistance lower than that of stainless steel;
- and
- wherein the complete and substantially uniform electroplating of the first electroplated layer and second electroplated layer is produced by low tension transport through electroplating process stations of the conductive yarn which has a twist of no more than 1 turn/inch.
3 more elements
A conductive multi-fiber comprising:
- a plurality of metallized monofilaments each including:
- a stainless steel monofilament;
- a first electroplated layer of a first metal or metal alloy completely and substantially uniformly electroplated on the stainless steel monofilament;
- a second electroplated layer of a second metal or metal alloy completely and substantially uniformly electroplated on the first electroplated layer;
- and
- wherein the complete and substantially uniform electroplating of the first electroplated layer and second electroplated layer is produced by low tension transport through electroplating process stations of the plurality of metallized microfilaments which has a twist of no more than 1 turn/inch.
3 more elements
Dependencies are inferred from the claim text.