International Business Machines Corporation

Werner Straehle

Gordon A Kelley, Jr

Richard W Noth

Kurt Hinrichsmeyer

Frank Rossi

A modular photonic waveguide distribution system is disclosed which enables multi-directional and simultaneous communication within a multitude of coherent data processing units. The basic structure of an optical distributor element or module 1 is described and it is shown how the extension to complex data distribution structures can be achieved by respective combinations of the modules. Modes of operation and data selection are demonstrated.

Modular photonic waveguide distribution system

A semiconductor package utilizing a carrier with substantially parallel top and bottom surfaces having a recess in the bottom surface and a slot in the top surface communicating with the recess in the bottom surface and provided with electrical conductors on its top surface is provided with an integrated semiconductor chip having a major surface and contact pads on the major surface in the recess of the carrier, with said contact pads positioned in the region of said slot so that the contact pads can be connected by lead wires passing through said slot, to the conductors on the top side of the carrier. The active surface of the chip containing the contact pads is encapsulated but the back surface of the chip and carrier is left exposed to improve the thermal characteristics of the chip while maintaining a low package profile.

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Dettenhausen, Germany

Werner Straehle