Freescale Semiconductor,inc.

Sushil Bharatan

David Joseph Monk

Kun-Hin To

Pamela J Welch

Wen Ling M Huang

Carl Kyono

A structure that reduces signal cross-talk through the semiconductor substrate for System-On-Chip (SOC) () applications, thereby facilitating the integration of digital circuit blocks () and analog circuit blocks () onto a single IC. Cross-circuit interaction through a substrate () is reduced by strategically positioning the various digital circuit blocks () and analog circuit blocks () in an isolated wells (), (), () and () over a resistive substrate (). These well structures (), (), (), and () are then surrounded with a patterned low resistivity layer () and optional trench region (). The patterned low resistivity region () is formed below wells () and () and functions as a low resistance AC ground plane. This low resistivity region () collects noise signals that propagate between digital circuit blocks () and analog circuit blocks ().

Growing community of inventors

Gilbert, AZ, United States of America

Sushil Bharatan