Grounded Shielding Structure for IC Package Noise Isolation
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Solution Overview
Problem
High-density semiconductor packaging elements experience power noise coupling due to closely arranged electric power distribution networks, leading to signal jitter and decreased signal integrity.
Innovation Solution
Incorporating a grounded shielding structure between the electric power distribution networks and a grounding area in the integrated circuit package element, which electrically connects to both networks to block power noise coupling and improve isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electric power distribution networks are closely arranged to achieve high-density packaging, then packaging density is improved, but power noise coupling increases causing signal jitter
Solution Approach 1:
A grounded shielding structure is introduced as an intermediary element positioned between adjacent electric power distribution networks. This shielding structure acts as a mediator that blocks electromagnetic interference and power noise coupling between the closely arranged networks, thereby maintaining signal integrity while preserving high packaging density.
Solution Approach 2:
The harmful power noise coupling effect is extracted and isolated from the system by introducing a dedicated grounded shielding structure. This separates the noise interference from the signal transmission paths, allowing the power distribution networks to remain closely arranged while preventing noise propagation between them.
2Reliability
If grounded shielding structure is added between power distribution networks, then power noise coupling is reduced, but device complexity increases
Solution Approach 1:
The grounded shielding structure serves multiple functions simultaneously: it provides electromagnetic shielding between power networks, acts as an additional power distribution path through its connection to the grounding area, and provides a reference potential plane. This multi-functionality reduces the need for separate dedicated shielding components, thereby limiting the increase in device complexity.
Solution Approach 2:
The shielding structure is integrated with the existing power distribution network architecture by electrically connecting it to the grounding area. This merging approach combines the shielding function with the existing ground reference system, avoiding the need for completely separate shielding implementations and thus limiting complexity increases.
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 configuration significantly reduces signal jitter at the output end and enhances signal integrity by effectively isolating power noise coupling between the networks, improving electromagnetic wave isolation and noise isolation without increasing manufacturing costs.
Implementation Method 1
The grounded shielding structure is completely disposed between the first electric power distribution network and the second electric power distribution network, electrically connected to the chip element, and configured to block power noise coupling between the first electric power distribution network and the second electric power distribution network
Data Source
AI summary
An integrated circuit package element provided includes a chip element and a package module coupled to the chip element. The chip element includes two driving units that are electrically connected to each other. The package module includes a grounding area, two individual power distributed networks and a grounded shielding structure which is completely disposed between the individual power distributed networks, electrically connected to the chip element, and configured to block power noise coupling between the first electric power distribution network and the second electric power distribution network. The grounding area is electrically connected to the individual electric power distribution networks and the grounded shielding structure.