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Frederic Devisch, Xavier Maillard, Wei Pan, Cathleen De Tandt, Roger Vounckx, Maarten Kuijk
 

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Abstract 

This paper describes how to use half-conductive coupling (HC-coupling) to obtain digital interconnections between two flip-chip standard CMOS integrated circuits. For process simplicity, the HC-layer can be unpatterned and the CMOS chips do not require any post-processing steps. Measurements of a complete HC-coupling, digital communication link show reliable operation up to 100 Mb/s channel speed. The two flipped prototype CMOS chips were fabricated in 0.8-mum, 5-V CMOS. The I/O pads' pitch was 150 mum

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