Vertical Interconnect Between Channel Stacks for 3D IC Signal Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for improved computational devices with enhanced computational efficiency, particularly in integrated circuits, to support the increasing demand for modeling complex systems and reducing computation times, which current technologies struggle to achieve through scaling features and materials advancements.
Innovation Solution
The implementation of interconnect structures between channel stack structures in integrated circuits, where a sacrificial material is replaced with a conductive material to form an interconnect that extends across a span of transistors, facilitating improved signal communication and voltage provisioning across active regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional scaling and material advancements are used to improve computational efficiency, then device performance increases, but device complexity and manufacturing difficulty increase significantly
Solution Approach 1:
The patent introduces a vertical interconnect structure that extends through multiple transistor layers in the z-direction, enabling three-dimensional integration. This dimensional transition allows signals to traverse between transistors on different layers through a shared well region, achieving efficient inter-layer communication without increasing lateral device footprint or complexity
Solution Approach 2:
The vertical interconnect structure serves multiple functions simultaneously: it provides electrical connection between transistors on different layers, acts as a signal routing pathway, and enables voltage provisioning across active regions. This multi-functionality reduces the need for separate dedicated structures for each function, thereby managing device complexity
2Productivity
If more interconnect structures are added to improve signal communication between transistors, then computational efficiency improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the interconnect function with the transistor structure by forming vertical interconnects through shared well regions that are already present in the device architecture. This integration approach eliminates the need for separate, complex interconnect structures, simplifying the manufacturing process while achieving efficient signal communication
Solution Approach 2:
By transitioning from lateral to vertical interconnection, the patent reduces the number of interconnect structures needed in the lateral plane. The vertical dimension provides a direct pathway for signal communication between layers, reducing manufacturing complexity compared to adding more lateral interconnect lines
Data Source
AI summary
Techniques and mechanisms for providing an integrated circuit (IC) which comprises an interconnect that extends between channel structures of two transistors. In an embodiment, a separation layer is provided between a first stack of channel structures and a second stack of channel structures, wherein an interior region of the separation layer comprises a sacrificial material which spans on overlap region between the stacks. Fabrication processes form a hole which exposes the interior region, and etching is performed to remove the sacrificial material from the separation layer. Subsequently, deposition processing forms in the interior region a trace portion of the interconnect. In another embodiment, the interconnect comprises a contiguous body of a conductor material, wherein the contiguous body extends to form respective regions of the trace portion, and a via portion of the interconnect.