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Browse Prior Art Database

Electroless Deposition of Aluminum

IP.com Disclosure Number: IPCOM000094905D
Original Publication Date: 1965-Jul-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Friedman, HL: AUTHOR [+2]

Abstract

Ziegler's salt has been employed in an electrolytic bath in which aluminum is deposited upon various cathodes in the electrolytic bath containing the salt. An article entitled "Behavior of Germanium Electrodes in a Ziegler Electrolyte" by R. J. Flannery, J. E. Thomas, Jr., and D. Trivich appearing in the October 1963 issue of The Journal of the Electrochemical Society, pp. 1054-1058 discusses the electrolytic aluminum deposition on germanium or silicon electrodes.

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Electroless Deposition of Aluminum

Ziegler's salt has been employed in an electrolytic bath in which aluminum is deposited upon various cathodes in the electrolytic bath containing the salt. An article entitled "Behavior of Germanium Electrodes in a Ziegler Electrolyte" by R.
J. Flannery, J. E. Thomas, Jr., and D. Trivich appearing in the October 1963 issue of The Journal of the Electrochemical Society, pp. 1054-1058 discusses the electrolytic aluminum deposition on germanium or silicon electrodes.

Now pure aluminum can be deposited electrolessly upon metal surfaces such as aluminum, gold, or copper as well as on semiconductors such as germanium and silicon. A bath consisting of the Ziegler salt (Na/+/>(C(2)H(5))(3) Al|(2)F/- /plus excess (C(2)H(5))(3) Al) is prepared in sufficient volume to house the metal or semiconductor upon which the aluminum is to be deposited.

The metal surfaces that are to be coated are immersed in the bath. The latter is heated to and maintained within the temperature range of 180 degrees C. -250 degrees C. In this range, aluminum is electrolessly deposited on the immersed metal or semiconductor. The deposit made in this way is bright, compact and adherent.

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