International Business Machines Corporation

Der-jin Woan

James D Herard

Donald Seton Farquhar

David L Questad

Michael Joseph Klodowski

Norman A Card

James M Ergler

Paul R Kasperek

Richard S McKinley

An electronic package and method of formation. A thermally conductive layer having first and second opposing surfaces is provided. A first dielectric layer is laminated under pressurization to the first opposing surface of the thermally conductive layer, at a temperature between a minimum temperature Tand a maximum temperature T. Tconstrains the ductility of the first dielectric layer to be at least Dfollowing the laminating. Tdepends on Dand on a first dielectric material comprised by the first dielectric layer. A second dielectric layer is laminated under pressurization to the second opposing surface of the thermally conductive layer, at a temperature between a minimum temperature Tand a maximum temperature T. Tconstrains the ductility of the second dielectric layer to be at least Dfollowing the laminating. Tdepends on Dand on a second dielectric material comprised by the second dielectric layer.

Electronic package with optimized lamination process

A method and apparatus is described for reworking a printed circuit board having plugged vias and plated through holes. The printed circuit board, supported by a movable local support, is heated from only the bottom side by a heating device near the area on the PCB that contains the plated through hole or holes to be reworked. The heating device is removed when the solder in the plugged PTH is completely melted. At that time, blast air is turned on to remove and blow off the excess solder in the PTH. The compressed air is more effective in displacing the molten solder than is vacuuming, and has less chance of damaging the PCB than do conventional reworking methods, due to the non-contact nature of the invention.

Process for reworking circuit boards

Machine and process for reworking circuit boards

Growing community of inventors

Endicott, NY, United States of America

Der-jin Woan