Semiconductor Package Structure With Doped Leakage Barriers
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Solution Overview
Problem
The integration of metal-oxide-metal (MOM) capacitors in semiconductor packages leads to leakage issues due to metal residue forming a leakage path, which affects the reliability and performance of the semiconductor structure.
Innovation Solution
Incorporating doped regions around the connecting structures, such as p-type or n-type dopants, to form a barrier that blocks the leakage path and mitigate the issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MOM capacitors are integrated in semiconductor packages, then circuit density and functionality are improved, but leakage paths form due to metal residue affecting reliability
Solution Approach 1:
A doped region is introduced as an intermediary barrier between the MOM capacitor electrodes and surrounding structures. This doped region, with its modified electrical properties, acts as a mediator to block leakage paths formed by metal residue while allowing the capacitor to maintain its intended function. The intermediary doped region effectively separates the capacitive elements from potential leakage pathways.
Solution Approach 2:
The electrical parameters of the substrate are locally modified by introducing dopants to create a doped region with different conductivity characteristics. This parameter change creates a high-resistance barrier that prevents leakage current flow. The doping process alters the electrical properties of the region surrounding the capacitor, transforming it from a conductive path to an insulating barrier.
2Reliability
If doped regions are added around connecting structures, then leakage paths are blocked improving reliability, but device complexity increases
Solution Approach 1:
Rather than modifying the entire device structure, the doping is applied locally only in specific regions where leakage paths are likely to occur around the MOM capacitor. This localized approach creates the necessary reliability improvement without requiring complex modifications throughout the entire device. The doped region is precisely positioned to address leakage issues while leaving other areas unchanged.
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 doped regions effectively obstruct leakage currents, enhancing the reliability and performance of the semiconductor package by preventing electrical shorts and improving overall functionality.
Implementation Method 1
Incorporating doped regions around the connecting structures, such as p-type or n-type dopants, to form a barrier that blocks the leakage path
Data Source
AI summary
A semiconductor structure includes a substrate, a capacitor disposed in the substrate, an interconnect structure disposed over the substrate, and a first doped region disposed in the substrate. The interconnect structure includes a first via structure coupled to the substrate, and a second via structure coupled to the capacitor. The first doped region is disposed under the first via structure. The first doped region includes p-type or n-type dopants.