Lucent Technologies Inc.

At+t Corp.

At&t Bell Laboratories

Urmi Ray

Siu-Ping Hong

Leslie A Guth

Jeffrey Jonathan Evans

Heidi M Gordon

Iris Artaki

Trudy Murrell Thiele

Jeffrey J Evans

Glass preforms are cleaned by contacting each preform (,) with supercritical carbon dioxide which dissolves residual index-matching oil on the preform. The liquefied carbon dioxide is then converted to gaseous carbon dioxide which conveniently separates the index-matching oil so that it can be recovered and reused. The gaseous carbon dioxide is likewise recycled for use in cleaning other preforms, and so there is substantially no waste.

Optical fiber preform cleaning method

In preparation for removing a protective adherent covercoat from a circuit board that is to be repaired, the surface integrity of the coating is altered (for example, by making incisions therein). Subsequently, the coated circuit board is subjected to supercritical carbon dioxide in a processing chamber. Following this process, the coating is easily lifted from the board.

Method for stripping conformal coatings from circuit boards

The accuracy of detection of the quantity of a rosin flux residue (18) left on an electronic assembly (11) after a cleaning operation is improved by using gel permeation chromatography for such detection.

Analytic method for use in electronic circuit assembly operations

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Plainsboro, NJ, United States of America

Urmi Ray