Rca Inc.

Henry Wielicki

Chih C Wang

Lincoln Ekstrom

Thomas Clifford Lausman

Eugene Samuel Poliniak

Richard Joseph Himics

Molecular distillation of methyl alkyl siloxanes of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl groups of 4-20 carbon atoms and m and p are integers to produce a distillate having a molecular weight fraction wherein the sum of m and p is about 4, produces an improved lubricant for the video disc, a lubricant that is stable to long term storage and to wide variations in temperature and relative humidity.

Video disc lubricants

Siloxanes of the formula ##STR1## wherein R.sub.3 and R.sub.3 ' independently at each occurrence are long chain alkyl groups and m is an integer of 0 or 1, can be employed as lubricants for video discs. The lubricants are stable to long term storage and to wide variations in temperature and humidity.

To improve the adherence of an olefin-SO.sub.2 copolymer film employed as an electron beam resist to a metallic substrate, a thin film of gold is first applied to the substrate. The resulting bond is strong enough to withstand exposure to electron beams, development of the resist film and electroplating of the film witout undercutting, lifting or distortion of the film.

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Wyndmoor, PA, United States of America

Henry Wielicki