Vertical Buried Via MIM Capacitor for IC Power Surge Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing integrated circuits face challenges in efficient power delivery due to sudden power demands, as typical interconnects between front-side and back-side layers often deplete charge before it can be replenished, and planar capacitors consume substantial area that could be used for other circuits or signals.
Innovation Solution
The implementation of cylindrical metal-insulator-metal (MIM) capacitors that span metal layers from the front-side to the back-side, allowing for immediate surge current delivery while occupying less area, formed through a vertical metallization structure with a dielectric material between metal electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If planar capacitors are used for power delivery, then charge storage capability is improved, but area consumption increases substantially
Solution Approach 1:
The patent transitions from planar (2D) capacitor design to three-dimensional vertical capacitor structures. The vertical capacitors extend through multiple metallization layers in the vertical dimension, achieving high charge storage capability without occupying excessive planar area. This dimensional transition allows the capacitor to utilize the vertical space between front-side and back-side metallization layers, effectively decoupling charge storage capacity from area consumption.
2Device complexity
If typical interconnects are used between front-side and back-side layers, then power delivery is simplified, but charge replenishment speed deteriorates during sudden power demands
Solution Approach 1:
The vertical capacitors are positioned in close proximity to high-power-consuming components and pre-stored charge is maintained in these capacitors in advance. When sudden power demands occur, the pre-stored charge can be immediately delivered through the vertical interconnects, eliminating the delay associated with charge replenishment from distant power sources. This preliminary charge storage action ensures rapid response to power surges while maintaining a relatively simple power delivery architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances power delivery capabilities, meets current requirements, and frees up area for other circuits or signals by providing immediate surge currents and efficient charge storage, reducing the likelihood of power droop in computationally intensive systems.
Implementation Method 1
cylindrical metal-insulator-metal (MIM) capacitors that span metal layers from the front-side to the back-side... formed through a vertical metallization structure with a dielectric material between metal electrodes
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
An integrated circuit (IC) die includes a plurality of front-side metallization layers including a first front-side metallization layer and one or more additional front-side metallization layers, a plurality of back-side metallization layers formed on the plurality front side metallization layers including a first back-side metallization layer and one or more additional back-side metallization layers, wherein the first front-side metallization layer is proximate to the first back-side metallization layer, and a vertical metallization structure formed through at least the first front-side metallization layer and the first back-side metallization layer, wherein the vertical metallization structure electrically connects a first metallization structure on one of the one or more additional front-side metallization layers to a second metallization structure on one of the one or more additional back-side metallization layers. Other embodiments are disclosed and claimed.