PoP Semiconductor Package With Integrated Stack Capacitor for Power Noise
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Solution Overview
Problem
Existing semiconductor packaging technologies face challenges in integrating high-capacitance decoupling capacitors effectively within semiconductor devices to manage power noise, particularly as chip sizes shrink and integration demands increase.
Innovation Solution
A semiconductor package design incorporating a memory chip, a logic chip, and an integrated stack capacitor (ISC) that is electrically connected to both, with a stacked Package-on-Package (PoP) structure and interconnection structures to facilitate efficient power management and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-capacitance decoupling capacitors are integrated within semiconductor devices, then power noise resistance is improved, but device complexity and integration difficulty increase
Solution Approach 1:
The patent combines the decoupling capacitor with the memory chip structure itself, making the capacitor an integral part of the chip rather than a separate component. This merging approach enables high-capacitance noise filtering while reducing the number of discrete components and simplifying the overall device architecture.
Solution Approach 2:
The decoupling capacitor is nested within the memory chip structure, with capacitor elements positioned between and around memory cell arrays. This nesting allows the capacitor to utilize the same three-dimensional space as the memory cells, achieving high capacitance without increasing the chip's external dimensions or adding separate capacitor packages.
2Area of moving object
If chip sizes are reduced to meet miniaturization demands, then device compactness is improved, but integration of high-capacitance decoupling capacitors becomes more difficult
Solution Approach 1:
The patent transitions from two-dimensional planar capacitor layouts to three-dimensional vertically stacked capacitor structures. Multiple capacitor layers are stacked above and below the memory cell arrays, utilizing the vertical dimension to achieve high capacitance values within a reduced horizontal chip footprint, thereby enabling miniaturization while maintaining noise filtering performance.
Solution Approach 2:
The decoupling capacitor structure is optimized with different regional configurations - some areas have higher capacitor density while others have lower density, allowing the overall chip to achieve high capacitance in specific regions without uniformly increasing complexity across the entire chip area. This localized optimization enables selective placement of capacitor elements where most needed.
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
The design enhances the resistance of semiconductor devices to power noise by utilizing high-capacitance decoupling capacitors, ensuring effective power supply and signal integrity while maintaining compact form factors.
Implementation Method 1
an integrated stack capacitor (ISC) electrically connected to the memory chip and electrically connected to the logic chip
Data Source
AI summary
A semiconductor package including a first package including a memory chip having a memory cell, and a capacitor structure disposed independently of the memory chip; and a second package including a logic chip configured to access the memory cell, wherein the capacitor structure is electrically connected to the memory chip and the logic chip.