At&t Bell Laboratories

Bell Telephone Laboratories

Thomas E Graedel

John Philip Franey

By using a specific polymer material for handling, shipping, and storage, integrated circuits are protected from both corrosion and electrostatic discharge. This enclosure material includes a polymer matrix with both carbon black and a metal embedded. Suitable metals include copper, iron, cobalt, and manganese.

Protection of devices

An indicator device useful for detecting H.sub.2 S is disclosed. This detector utilizes a polymer having a permeation constant of at least 5.times.10.sup.-9 cm.sup.3 H.sub.2 S.multidot.cm thickness/(cm.sup.2 area.multidot.sec.multidot.cm Hg) with an incorporated lead containing compound at concentration levels of at least 10 weight percent. These compositions are useful for detecting hydrogen sulfide in concentrations as low as approximately 10 parts per billion by volume, or concentrations of approximately 1 part per million in relatively short periods, e.g., five minutes, and are utilizable for quantitative measurements of H.sub.2 S concentration.

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Mendham, NJ, United States of America

Thomas E Graedel