3D Capacitor Chip Bonding for Stable High-Frequency Semiconductor Power
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Solution Overview
Problem
The semiconductor industry seeks to further reduce the size and improve the operating characteristics of stacked semiconductor devices, such as 3D integrated circuits, by enhancing packaging techniques to accommodate smaller and more creative semiconductor dies.
Innovation Solution
The implementation of deep trench capacitors and through vias within a semiconductor substrate, combined with system-on-chip integration using microbumps, allows for closer placement of capacitors to active devices, enabling larger capacitance and improved electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If semiconductor process node is reduced to increase integration density, then more components can be integrated into a given area, but manufacturing precision and minimum feature size control become more difficult
Solution Approach 1:
The patent transitions from planar 2D integration to 3D vertical integration by stacking multiple semiconductor dies. This dimensional change allows continued increase in integration density without further reducing the minimum feature size on each die, thereby avoiding the manufacturing precision challenges associated with sub-20nm nodes while still achieving higher component density through vertical stacking of multiple layers.
2Volume of moving object
If stacked semiconductor devices are used to reduce physical size, then form factor is reduced, but device complexity and packaging difficulty increase
Solution Approach 1:
The patent divides the semiconductor system into separate functional dies (compute die, memory die, I/O die) that are manufactured independently using standard process nodes. Each die is packaged separately with its own encapsulation and bonding pads, simplifying the manufacturing of individual components. The complex 3D integration is then achieved through standardized die-to-die bonding interfaces, separating the complexity of high-density integration from the manufacturing of individual dies.
3Reliability
If capacitor placement is moved closer to active devices, then electrical performance and voltage stability improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces an interposer substrate as an intermediary layer between the semiconductor die and the final package. The interposer provides a platform for placing capacitors and other passive components close to the active devices through its substrate structure, while the standardized bonding interfaces and routing layers on the interposer absorb the manufacturing tolerances, eliminating the need for ultra-precise direct placement of capacitors on the die itself.
Data Source
AI summary
Three dimensional structures and methods are provided in which capacitors are formed separately from a first semiconductor device and then connected to the first semiconductor device. For example, a capacitor chip is provided and then bonded to a first semiconductor die. The capacitor chip and the first semiconductor die are encapsulated with a first encapsulant, and one of the capacitor chips and the first semiconductor die are thinned to expose through vias.