Flexible Bridge for High-Bandwidth Chip Communication
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Solution Overview
Problem
Existing semiconductor chip communication technologies face challenges in achieving high-bandwidth communication due to alignment issues caused by thermal expansion, mechanical vibrations, and manufacturing perturbations, which complicate the precise alignment required for effective capacitive coupling between chips.
Innovation Solution
A flexible bridge system that allows chips to communicate without precise alignment, using micro-bumps for conductive bonding and incorporating proximity-communication regions, enabling high-bandwidth communication while accommodating thermal management and power delivery, and fabricated using additive or subtractive processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional single-chip modules or multi-chip modules are used for chip mounting, then chips can be mounted and connected, but precise alignment between chips is difficult to achieve due to thermal expansion, mechanical vibrations, and manufacturing perturbations
Solution Approach 1:
The patent employs a flexible bridge structure that can accommodate misalignment between chips. The bridge includes a flexible substrate with conductive traces that can bend and deform to compensate for positional deviations, allowing reliable electrical connection even when chips are not perfectly aligned due to thermal expansion or manufacturing tolerances
Solution Approach 2:
The flexible bridge structure dynamically adapts to alignment variations through its inherent flexibility. The bridge can deform elastically in response to thermal expansion, mechanical vibrations, or positioning errors, maintaining continuous electrical contact without requiring rigid precision alignment
2Productivity
If capacitive coupling is used for inter-chip communication, then communication bandwidth is increased, but precise alignment of transmitter and receiver pads is required
Solution Approach 1:
The flexible bridge provides a mechanical and electrical connection structure that compensates for pad misalignment. By allowing the bridge to deform, the conductive traces maintain optimal coupling distance and alignment between transmitter and receiver pads, enabling high-bandwidth capacitive communication without requiring extremely precise pad positioning
Solution Approach 2:
The flexible bridge acts as an intermediary structure between the two chips, providing both mechanical support and electrical connection. It mediates the alignment requirements by absorbing positional deviations through its flexibility, allowing the capacitive coupling interfaces to function effectively even when chips are not perfectly positioned
3Productivity
If chips are positioned face-to-face for capacitive coupling, then direct communication is enabled, but thermal management and power delivery become more complex
Solution Approach 1:
The flexible bridge serves multiple functions simultaneously: it provides electrical connection through conductive traces, enables thermal management through heat dissipation pathways, and facilitates power delivery. This multi-functionality reduces the need for separate dedicated structures for each function, simplifying the overall system design
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 flexible bridge system enables high-bandwidth communication between chips with reduced power consumption and alignment constraints, enhancing communication density and thermal conductivity, and allowing for re-mateable connections that maintain compatibility with conventional packaging technologies.
Implementation Method 1
the flexible bridge is bonded conductively to the active face of the chip using micro-bumps
Implementation Method 2
If a first chip is situated face-to-face with a second chip so that transmitter pads on the first chip are capacitively coupled with receiver pads on the second chip, the first chip can transmit data signals directly to the second chip
Implementation Method 3
The chips in these structures are subject to thermal expansion and mechanical vibrations, as well as manufacturing and assembly perturbations that cause alignment problems
Implementation Method 4
The chips in these structures are subject to thermal expansion and mechanical vibrations
Data Source
AI summary
One embodiment of the present invention provides a system that facilitates high-bandwidth communication using a flexible bridge. This system includes a chip with an active face upon which active circuitry and signal pads reside, and a second component with a surface upon which active circuitry and/or signal pads reside. A flexible bridge provides high-bandwidth communication between the active face of the chip and the surface of the second component. This flexible bridge provides a flexible connection that allows the chip to be moved with six degrees of freedom relative to the second component without affecting communication between the chip and the second component. Hence, the flexible bridge allows the chip and the second component to communicate without requiring precise alignment between the chip and the second component.