The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> Analog Design >> IC package ground plane
https://designers-guide.org/forum/YaBB.pl?num=1479919983

Message started by engrvip on Nov 23^rd, 2016, 8:53am

Title: IC package ground plane
Post by engrvip on Nov 23^rd, 2016, 8:53am

Inside an IC package, what is the purpose of ground plane. Is it connected to the backplane of substrate for biasing it.

Is it useful only in high frequency RF circuits or required for low frequency analog and digital circuits also.

Title: Re: IC package ground plane
Post by loose-electron on Nov 23^rd, 2016, 5:44pm

Two things:

1. Thermal conduction path. (grounded metal slug in some IC packages)

2. Localized common node tie point for ground, to provide "up close" (minimum L in interconnect) to bring grounds at chip bonding pads together.