Package-Level ESD Protection Using Conductive Carbon-Polymer Networks
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Solution Overview
Problem
Microelectronic packages face challenges with electrostatic discharge (ESD) that can cause partial to full breakdown of integrated circuits, especially as IC sizes shrink and high-speed signal lines increase, necessitating effective ESD protection solutions that minimize die area usage.
Innovation Solution
An embedded packaging solution incorporating composites of two-dimensional electrically-conductive carbon allotropes, intrinsically-conductive polymers, and a non-conductive polymer matrix through direct chemical functionalization, creating an interconnected network for improved electrical pathways during over-voltages, with a voltage threshold that switches from insulative to conductive states for ESD protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ESD protection methods are used, then ESD protection is provided, but die area is consumed
Solution Approach 1:
The patent moves ESD protection from the die level to the package level by embedding conductive polymers and carbon allotropes in the package substrate. This dimensional shift allows ESD protection functionality to be provided outside the die, thereby preserving宝贵的 die area while maintaining reliability against ESD events.
Solution Approach 2:
The patent employs composite materials consisting of conductive polymers combined with carbon allotropes (graphene, carbon nanotubes, carbon fibers) embedded in the package substrate. This composite approach provides effective ESD protection pathways without consuming die area, as the protection mechanism is implemented in the package-level material composite rather than on the die itself.
2Reliability
If conductive polymers and carbon allotropes are combined, then electron transport is enhanced and percolation threshold is lowered, but material complexity increases
Solution Approach 1:
The patent merges conductive polymers with carbon allotropes (graphene, carbon nanotubes, or carbon fibers) to create a synergistic composite material system. This combination enhances electron transport pathways and lowers the percolation threshold, providing more effective ESD protection. The merging of these materials occurs at the package substrate level, integrating multiple functional components into a unified ESD protection mechanism.
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 electron transport and lowers the percolation threshold, allowing specific tuning of ESD voltage ranges, effectively protecting microelectronic packages from ESD events while maintaining normal electrical communication at lower voltages.
Implementation Method 1
an electrically-conductive polymer that chemically bonds the first and second electrically-conductive carbon allotropes to one another
Implementation Method 2
creating an interconnected network for improved electrical pathways during over-voltages
Implementation Method 3
with a voltage threshold that switches from insulative to conductive states for ESD protection
Data Source
AI summary
Embodiments may relate to a microelectronic package comprising: a die and a package substrate coupled to the die with a first interconnect on a first face. The package substrate comprises: a second interconnect and a third interconnect on a second face opposite to the first face; a conductive signal path between the first interconnect and the second interconnect; a conductive ground path between the second interconnect and the third interconnect; and an electrostatic discharge (ESD) protection material coupled to the conductive ground path. The ESD protection material comprises a first electrically-conductive carbon allotrope having a first functional group, a second electrically-conductive carbon allotrope having a second functional group, and an electrically-conductive polymer chemically bonded to the first functional group and the second functional group permitting an electrical signal to pass between the first and second electrically-conductive carbon allotropes.