Near Field Coupling for High-Density Memory Bus Bandwidth
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Solution Overview
Problem
Die stacking in memory technology leads to capacitive loading, reducing bus bandwidth and limiting data transfer rates due to the parallel arrangement of devices.
Innovation Solution
The use of near field coupling through loop antennas between memory integrated circuits, allowing for wireless communication and data transfer without direct electrical contact, while tuning the antennas to specific spacings to minimize interference and maintain high data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If die stacking technology is used to achieve high density memory, then memory density is improved, but bus bandwidth is reduced due to capacitive loading
Solution Approach 1:
The patent replaces the traditional electrical contact system (mechanical/electrical connection) with a wireless electromagnetic field-based communication system. Loop antennas are used to establish electromagnetic coupling between memory dies, eliminating the need for direct electrical contacts and thereby removing the capacitive loading effect that limits bus bandwidth.
Solution Approach 2:
The patent introduces loop antennas as intermediary elements that facilitate data transfer between memory dies. These antennas act as mediators by converting electrical signals to electromagnetic fields and back, enabling wireless communication that avoids the direct electrical path and its associated capacitive loading problems.
2Quantity of substance
If multiple devices are placed in parallel for high density, then memory capacity is improved, but data transfer rate is limited due to loading effects
Solution Approach 1:
The patent replaces the parallel electrical connection architecture with a wireless electromagnetic field-based architecture. By using loop antennas for each memory die, data transfer occurs through electromagnetic coupling rather than shared electrical buses, eliminating the loading effects that limit data transfer rates in parallel configurations.
Solution Approach 2:
The patent segments the communication path for each memory die by providing dedicated loop antennas for transmission and reception. This segmentation isolates each die's communication channel, preventing the loading effects that occur when multiple devices share common electrical buses, thereby maintaining high data transfer rates across all parallel devices.
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 approach enables high-density memory storage with maintained maximum data transfer rates by reducing capacitive loading and interference, facilitating reliable data transfer in distributed memory systems.
Implementation Method 1
Wireless communication link using near field coupling
Data Source
AI summary
A memory device may include an array of closely spaced memory integrated circuits that communicate wirelessly over at least two frequencies using near field coupling.