Integrated Circuit Chip Heater for Thermal Gradient Reduction
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Solution Overview
Problem
Integrated circuits experience uneven heat distribution, leading to large temperature gradients and mechanical stresses, which can result in premature device failure, especially when stacked in 3D arrays.
Innovation Solution
Incorporating chip heaters and a heater controller that detect temperature gradients and differences to actively heat cooler areas of the chip, reducing thermal stresses and improving performance predictability by maintaining optimal temperature profiles across the chip and within 3D arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If integrated circuits operate normally, then heat is generated for performing functions, but uneven heat distribution causes large temperature gradients and mechanical stresses
Solution Approach 1:
The patent applies local quality by placing multiple heater elements at specific locations across the integrated circuit chip to create localized heating zones. Each heater can be independently controlled to compensate for temperature variations in its specific region, thereby reducing overall temperature gradients and mechanical stresses while maintaining the chip's functional power output.
Solution Approach 2:
The patent changes the thermal parameter distribution across the chip by dynamically adjusting the heating parameters of individual heater elements. The system monitors temperature at multiple locations and modifies the power delivered to each heater to maintain uniform temperature distribution, thus preventing device failure caused by thermal stress.
2Reliability
If temperature gradients are reduced to improve reliability, then heater elements and control circuitry are added, increasing device complexity
Solution Approach 1:
The patent implements multi-functionality by integrating the heater elements into the existing chip structure, allowing them to serve both as thermal management components and as part of the functional circuitry. The same control circuitry that manages other chip operations is also used to control the heater elements, thereby reducing overall system complexity despite adding thermal management capabilities.
Solution Approach 2:
The patent merges the thermal management function with the existing chip architecture by integrating heater elements alongside functional circuit components. The control system combines temperature monitoring and heater control with the existing power management and signal processing circuits, creating a unified system that reduces complexity compared to adding separate thermal management subsystems.
3Reliability
If wide tolerances are used for circuit timings to accommodate temperature variations, then performance predictability improves, but circuit efficiency and speed decrease
Solution Approach 1:
The patent creates thermal equipotentiality across the chip by using multiple localized heaters to maintain uniform temperature distribution. This eliminates temperature-induced performance variations, allowing the circuit to operate at optimized timing parameters without needing wide tolerances, thereby maintaining both predictability and high speed performance.
Solution Approach 2:
The patent applies preliminary action by proactively heating specific regions of the chip before temperature gradients can develop and affect circuit performance. The system continuously monitors temperature and activates heaters in advance to prevent thermal variations, ensuring consistent circuit timing and speed without requiring conservative design tolerances.
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 solution effectively reduces temperature gradients and mechanical stresses, enhancing the reliability and performance consistency of integrated circuits by ensuring more uniform thermal conditions across the chip and between stacked chips.
Implementation Method 1
a chip heater to provide heat to the integrated circuit chip at the first location
Data Source
AI summary
A device comprising a first detector, comprising an output, disposed at a first location of an integrated circuit chip and configured to determine a first temperature information, a chip heater, comprising an input to receive a control signal, disposed at a second location of the integrated circuit and configured to heat an area of the integrated circuit device that includes the first location and the second location, based upon the control signal, and a heater controller comprising a first input coupled to the output of the first detector to receive the first temperature information, and an output coupled to the input of the chip heater, the heater controller configured to generate the control signal based upon the first temperature information.