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Temperature Sensing of Plated Metals

IP.com Disclosure Number: IPCOM000085612D
Original Publication Date: 1976-May-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Schwartz, BC: AUTHOR

Abstract

Entrapment of a heat sensitive material in an electrodeposited metal is used as a means of temperature detection. For example, the organic dye fuchsin (C(20)H(19)N(3)HCl) when used in electroplating solutions deposits and becomes occluded without molecular change during electro-deposition operations. However, when the fuchsin containing plated metal is heated above about 175 degrees C fuchsin thermally decomposes. Small amounts of fuchsin containing plated material is then dissolved in acid and then treated with organic solvents to extract the dye or its decomposition products. The presence or absence of the dye in the solvent is then determined, for example, spectrophotometrically.

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Temperature Sensing of Plated Metals

Entrapment of a heat sensitive material in an electrodeposited metal is used as a means of temperature detection. For example, the organic dye fuchsin (C(20)H(19)N(3)HCl) when used in electroplating solutions deposits and becomes occluded without molecular change during electro-deposition operations. However, when the fuchsin containing plated metal is heated above about 175 degrees C fuchsin thermally decomposes. Small amounts of fuchsin containing plated material is then dissolved in acid and then treated with organic solvents to extract the dye or its decomposition products. The presence or absence of the dye in the solvent is then determined, for example, spectrophotometrically.

The incorporation of a dye in electrodeposited metals for temperature sensing has many uses and advantages over conventional temperature sensing techniques. For example, it provides convenient means for incorporating a temperature sensor in an electrical circuit. Since the dye is entrapped in the metal it requires no additional contacts or space.

Additionally, the use of such a dye allows detection of heat encountered throughout the metal, rather than being limited to the detection of the temperature of the metal at its surface. The testing system is stable. The dye remains within the metal without deterioration until it is exposed to a temperature in excess of 175 degrees C.

When such a dye is incorporated in plated material within a product, the ...