Multi-Zone Substrate Bonder Temperature Control for Distortion Reduction
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Solution Overview
Problem
Existing substrate bonding technologies face challenges in achieving uniform temperature control and minimizing thermal expansion-induced distortions during fusion bonding, particularly in the semiconductor industry, which affects the quality and reliability of integrated circuits and micro-electronic devices.
Innovation Solution
A temperature controlling apparatus and substrate holder system with multi-zone temperature control and feedback mechanisms, utilizing fluid conduits and IR sensors to maintain uniform temperature across substrates, reducing thermal variations and distortions through precise temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional substrate bonding is performed without temperature control, then the bonding process is simple, but thermal expansion-induced distortions occur and temperature uniformity is poor
Solution Approach 1:
The substrate holder is divided into multiple heating zones with independent temperature control, allowing each zone to be optimized separately. This segmentation enables precise temperature uniformity across the substrate while maintaining manageable system complexity through modular control.
Solution Approach 2:
Temperature sensors are integrated into the substrate holder to provide real-time feedback to the control system. This feedback mechanism allows the system to automatically adjust heating power to maintain uniform temperature distribution, achieving high temperature precision without requiring overly complex manual control systems.
2Strength
If high temperature is applied during bonding, then bonding strength is improved, but thermal expansion distortions increase
Solution Approach 1:
The system enables precise control of temperature parameters, maintaining the optimal bonding temperature without excessive heat. By accurately controlling the temperature parameter within a narrow range, the system achieves sufficient bonding strength while minimizing thermal expansion distortions that occur with higher temperatures.
Solution Approach 2:
Different zones of the substrate holder can be maintained at slightly different temperatures to optimize both bonding strength and minimize distortion. The local quality principle allows specific areas to have tailored temperature conditions, ensuring strong bonding where needed while preventing excessive thermal expansion in sensitive regions.
3Productivity
If rapid heating is used to reduce processing time, then productivity is improved, but temperature uniformity deteriorates
Solution Approach 1:
The segmented heating zones allow different parts of the substrate to be heated at different rates. This enables rapid overall heating for productivity while maintaining temperature uniformity across the substrate surface, as each zone can be controlled to heat at the optimal rate for uniformity.
Solution Approach 2:
The heating system can apply periodic heating cycles with controlled ramp rates, allowing the substrate to heat uniformly throughout the process. This periodic control maintains temperature uniformity while still achieving rapid overall heating to preserve productivity.
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 system ensures uniform temperature distribution, minimizing distortions and improving bonding quality by maintaining isotropic mechanical properties, reducing overlay residuals, and enhancing the performance of integrated circuits.
Implementation Method 1
a first zone of the first substrate and a second zone of the first substrate... maintaining a first temperature... maintaining a second temperature
Implementation Method 2
utilizing fluid conduits to maintain uniform temperature across substrates
Implementation Method 3
IR sensors to maintain uniform temperature across substrates
Implementation Method 4
Direct bonding, or fusion bonding, is used as a substrate bonding process
Data Source
AI summary
The present disclosure provides a substrate bonding apparatus capable of temperature monitoring and temperature control. The substrate bonding apparatus comprises a fluid cooling module and a sensor module for detecting temperatures at multiple zones (e.g., two or more zones) within a substrate. The substrate bonding apparatus according to the present disclosure achieves temperature stabilization within the substrate. The substrate bonding apparatus further improves bonding process performance by reducing distortion residual, reducing bubbles on edges of the substrate, and reducing non-bonded area within the substrate.