Integrated Capacitor Assembly for Low-Latency IC Power Delivery
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Solution Overview
Problem
Integrated circuit (IC) packages face challenges in efficiently managing power delivery due to the small size of dies, thermal constraints, and power delivery latency issues, particularly with surface-mounted capacitors that increase latency and occupy limited space.
Innovation Solution
The implementation of a microelectronic assembly with a capacitor in one dielectric layer and a conductive pillar connecting it to a die in another layer, allowing for improved power delivery while reducing package size, using interconnects like CTD, DTD, and DTPS interconnects for efficient signal and power routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface-mounted capacitors are used on a die or circuit board, then power delivery management is achieved, but power delivery latency increases and available space is reduced
Solution Approach 1:
The patent transitions from surface-mounted capacitor placement (2D plane) to vertically stacked capacitor layers (3D space). By positioning capacitors in different vertical layers and connecting them through conductive vias, the design achieves shorter current paths and reduced inductance, thereby decreasing power delivery latency while maintaining effective power management.
Solution Approach 2:
The patent embeds multiple capacitor layers within the vertical structure of the IC package, nesting capacitors in different dielectric layers between the die and the circuit board. This nested arrangement allows capacitors to be integrated within the package volume rather than occupying surface area, reducing latency through shorter trace lengths while preserving space.
2Reliability
If surface-mounted capacitors are used on a die or circuit board, then power delivery management is achieved, but available space is reduced
Solution Approach 1:
The patent moves capacitor placement from the horizontal surface plane to the vertical dimension by creating multiple capacitor layers stacked between the die and circuit board. This vertical stacking utilizes the z-axis space within the package, significantly increasing the effective capacitor area without occupying additional surface area on the die or circuit board.
Solution Approach 2:
The patent combines multiple capacitor layers into a single integrated power delivery network within the package. By merging capacitors from different layers and connecting them through conductive vias, the design creates a unified decoupling structure that provides enhanced power management functionality while occupying minimal surface area.
3Productivity
If die size is reduced, then integration density is improved, but thermal constraints and power delivery challenges increase
Solution Approach 1:
The patent nests multiple capacitor layers within the vertical space of the IC package, creating a compact power delivery network that does not increase the horizontal footprint. This nested structure allows small dies to be closely spaced while maintaining adequate thermal and electrical isolation, thereby supporting high integration density without exacerbating thermal constraints.
Solution Approach 2:
By moving power delivery management resources to the vertical dimension through stacked capacitor layers, the patent reduces the horizontal space requirements for power management components. This enables tighter die packing for higher integration density while the vertical capacitor structure provides sufficient decoupling capacity without increasing thermal density at the die level.
Data Source
AI summary
Microelectronic assemblies, related devices, and methods are disclosed herein. In some embodiments, a microelectronic assembly may include a die having a first surface and an opposing second surface; a capacitor having a surface, wherein the surface of the capacitor is coupled to the first surface of the die; and a conductive pillar coupled to the first surface of the die. In some embodiments, a microelectronic assembly may include a capacitor in a first dielectric layer; a conductive pillar in the first dielectric layer; a first die having a surface in the first dielectric layer; and a second die having a surface in a second dielectric layer, wherein the second dielectric layer is on the first dielectric layer, and wherein the surface of the second die is coupled to the capacitor, to the surface of the first die, and to the conductive pillar.