Zoned Substrate Holder for Bonding Wave Front Control
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Solution Overview
Problem
Existing substrate bonding technologies face challenges with asymmetrical deformation due to mechanical anisotropy, leading to undesired run-out effects and alignment inaccuracies, particularly at the substrate edges, which affect bonding accuracy and throughput.
Innovation Solution
A substrate holder with specially formed zones and individually controllable fixing elements, arranged in a ring-shaped configuration, allows for targeted control of the bonding wave front to compensate for asymmetrical deformations and ensure radial symmetry during the bonding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If substrates are bonded using conventional substrate holders without zoned fixing elements, then the bonding process is simple and fast, but asymmetrical deformation occurs due to mechanical anisotropy leading to run-out effects and alignment inaccuracies
Solution Approach 1:
The substrate holder is divided into multiple zones with fixing elements distributed across different regions. Each zone can be independently controlled to apply or release fixing forces, allowing precise compensation for asymmetrical deformation during bonding while maintaining overall structural simplicity
Solution Approach 2:
Different regions (zones) of the substrate holder are equipped with fixing elements that can be selectively activated. This allows local adjustment of fixing forces to compensate for direction-dependent deformation in specific areas of the substrate, improving bonding accuracy without requiring complete redesign of the entire holder structure
2Manufacturing precision
If fixing elements are distributed uniformly across the substrate holder, then the structure is simple, but asymmetrical deformation cannot be compensated leading to run-out effects
Solution Approach 1:
Fixing elements are segmented into multiple controllable zones rather than being uniformly distributed. This segmentation enables selective activation of specific zones to compensate for asymmetrical deformation patterns while maintaining a relatively simple overall fixing element distribution structure
Solution Approach 2:
The fixing elements are arranged in zones that can be dynamically activated or deactivated. This dynamic control allows the system to adapt to asymmetrical deformation in real-time during the bonding process, improving alignment accuracy without requiring a complex static structure
3Manufacturing precision
If all fixing elements are activated simultaneously, then the substrate is firmly fixed, but asymmetrical deformation occurs during bonding leading to run-out effects
Solution Approach 1:
Fixing elements are organized into multiple zones that can be controlled independently. This allows the bonding process to proceed with zones being activated or deactivated in sequence, enabling precise control of the bonding wave front while maintaining simple operation through zone-based control groups
Solution Approach 2:
The fixing elements in different zones are activated in a sequential or periodic manner rather than all at once. This periodic activation allows controlled propagation of the bonding wave front across the substrate surface, improving bonding precision while keeping the control mechanism simple through timed zone activation
4Manufacturing precision
If zones are used to control bonding wave front, then bonding accuracy is improved, but the control system becomes more complex
Solution Approach 1:
The substrate holder is segmented into zones that correspond to natural deformation patterns. This segmentation allows bonding accuracy to be improved through zone-based control while keeping the control system relatively simple by grouping fixing elements into a manageable number of zones rather than controlling each element individually
Data Source
AI summary
A substrate holder for mounting a substrate, comprising fixing elements for fixing the substrate, wherein the fixing elements can be grouped into zones, and a corresponding method.