Integrated Circuit Thermal Structure for Alignment and Crosstalk Control
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Solution Overview
Problem
Managing thermal crosstalk and maintaining alignment between integrated circuits, particularly in high-density packaging scenarios, is challenging due to varying thermal expansion coefficients and limited cooling capabilities.
Innovation Solution
An integrated thermal management structure (ITMS) with a thermally conductive structure and adhesive layers is designed to maintain equal distances between features of integrated circuits across varying temperatures, using materials with matched thermal expansion coefficients and localized cooling to reduce thermal crosstalk and maintain optical/electrical alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If integrated circuits are combined in high-density packaging, then productivity and space utilization are improved, but thermal crosstalk and alignment stability deteriorate
Solution Approach 1:
The patent divides the thermal management system into separate independent thermal paths for each integrated circuit. Thermal management structures are individually coupled to each IC, creating segmented thermal zones that prevent thermal crosstalk while maintaining high integration density. This segmentation allows each IC to be cooled independently without affecting neighboring circuits.
Solution Approach 2:
The patent applies localized thermal management by providing individual thermal management structures for each integrated circuit rather than a unified cooling system. Each IC receives tailored thermal control based on its specific heat generation and thermal requirements, enabling precise local temperature control in high-density packaging while preventing thermal interference between adjacent circuits.
2Adaptability or versatility
If materials with different thermal expansion coefficients are used in integrated circuits, then adaptability to different thermal conditions is improved, but alignment stability deteriorates
Solution Approach 1:
The patent employs athermal design by carefully selecting and combining materials with different thermal expansion coefficients to create composite structures with near-zero net thermal expansion. By adjusting the parameters (thicknesses, material properties) of multiple layers, the system achieves thermal expansion compensation that maintains alignment stability across varying temperature conditions while preserving the adaptability of individual components.
3Temperature
If cooling power is increased to reduce thermal crosstalk, then temperature control is improved, but device complexity and power consumption worsen
Solution Approach 1:
The patent segments the cooling system into distributed, localized thermal management units for each integrated circuit rather than using a single high-power centralized cooling system. This segmentation reduces the peak power requirement of individual coolers and eliminates the need for excessive cooling capacity that would be required to compensate for thermal crosstalk in a unified system, thereby reducing overall power consumption while maintaining effective temperature control.
4Productivity
If integrated circuits are placed in close proximity, then productivity and space utilization are improved, but alignment precision deteriorates due to thermal expansion
Solution Approach 1:
The patent uses athermal design principles that adjust the parameters of multiple material layers (thicknesses, thermal expansion coefficients) to create a composite structure with compensated thermal expansion. This allows integrated circuits to be placed in close proximity for high-density packaging while maintaining alignment precision, as the athermal structure minimizes relative displacement between components caused by thermal expansion across temperature variations.
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 ITMS effectively reduces thermal crosstalk and strain, enabling efficient temperature control of individual chips while preserving alignment, thus improving performance and reducing structural failure risks.
Implementation Method 1
a thermally conductive structure mechanically connected to the second surface of the first integrated circuit and mechanically connected to the second surface of the second integrated circuit
Implementation Method 2
A feature of the first integrated circuit and a feature of the second integrated circuit are positioned at respective distances from a reference plane intersecting a portion of the thermally conductive structure, such that the distances remain substantially equal to each other at each of a plurality of temperatures within a predetermined operating temperature range
Data Source
AI summary
An article of manufacture comprises: a first integrated circuit, with a cavity formed through an entire thickness between a first surface of the first integrated circuit and a second surface of the first integrated circuit; a second integrated circuit having a size such that at least a portion of the second integrated circuit fits within at least a portion of the cavity; and a thermally conductive structure mechanically connected to the second surface of the first integrated circuit and mechanically connected to a surface of the second integrated circuit. A feature of the first integrated circuit and a feature of the second integrated circuit are positioned at respective distances from a reference plane intersecting a portion of the thermally conductive structure, such that the distances remain substantially equal to each other at each of a plurality of temperatures within a predetermined operating temperature range.