Middle of Layer Routing Enablement for Increasing Routing Resource
Event Type
Designer, IP and Embedded Systems Track Presentations
Virtual Programs
Hosted in Virtual Platform
Back-End Design
DescriptionWe address the importance of enabling middle of layer (MOL) for new routing layer
Low-level metal layers are highly congested and occupied by signal/power/pin shape nets so that adding one more low-level metal is more valuable than adding more layer in high-level metal
In this work, we propose a design methodology to extend the routing layer to the middle of line layer as new routing resource in consideration of 1) resource planning and 2) complex FEOL design rule.
Our experiment demonstrates that additional 2.7%~2.8% area scaling can be achieved through the industrial test-cases using the proposed methods. In our proposed method can contributes to total 2.4% wire length reduction especially bottom layer 3.5% (i.e. upper layers 1.9%)