Three-dimensional opto-electronic modules having a plurality of opto-electronic (O/E) layers, with optical signals being routed between O/E layers within one or more three-dimensional volumes, are disclosed. In preferred embodiments, the O/E layers are disposed over and above one another with at least...http://www.google.ca/patents/US6690845?utm_source=gb-gplus-sharePatent US6690845 - Three-dimensional opto-electronic modules with electrical and optical interconnections and methods for making