Riko was a real pathfinder in the early wilderness of 3D IC technology in both its aspects: chip architecture and design. He has influenced many folks from different areas as foundries, OSATs, EDA to start work together. Due to his inspiration and vision the development of new EDA tools have been initiated: extraction, thermal and stress assessments, etc. 3D integration survived an initial skepticism and pessimism inevitable accompanying any novel technology because of such enthusiasts as Dr. Riko Radojcic.