Abstract: A method of fabricating a rotor for an electric traction motor including the steps of forming cavities in the rotor, injecting magnetic material in a portion of the cavities, injecting nonmagnetic material in a portion of the cavities, and post-magnetizing the magnetic material.
September 14, 2001
Date of Patent:
February 3, 2004
General Motors Corporation
Khwaja M. Rahman, Peter James Savagian, Francois J. Biais, Constantin C. Stancu
Abstract: A microelectronic element is formed from a structure including metal layers on top and bottom sides of a dielectric. Apertures are formed in the top metal layer, and vias are formed in the dielectric in alignment with the apertures. Top and bottom conductive features are formed in proximity to the vias, as by selectively depositing a metal on the metal layers or selectively etching the metal layers. The top and bottom conductive features are connected to one another by depositing a conductive material into the vias, most preferably without seeding the vias as, for example, by depositing solder in the vias.