Substrate Processing Jig Plate Load Distribution
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Solution Overview
Problem
Existing substrate processing apparatuses face challenges in applying uniform load to substrates with elements due to variations in surface parallelism and flatness, leading to bonding failures, especially when the size of elements approaches several micrometers, and bending of jig plates complicates load distribution.
Innovation Solution
A substrate processing apparatus with a support member featuring columnar members that adjust their installation based on the in-plane load distribution to balance bending and ensure uniform load application, using installation holes of varying diameters and arrangements to stabilize the lower jig plate and prevent position shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lower jig plate is made more rigid to prevent bending, then the load distribution becomes more uniform, but the size, weight, or cost of the substrate processing apparatus increases
Solution Approach 1:
The patent applies local quality by installing columnar members at specific positions on the lower jig plate where bending occurs. Instead of making the entire jig plate more rigid (which would increase size, weight, or cost), columnar members are strategically placed at locations where load is applied or where bending is most pronounced. This localized reinforcement provides the necessary structural support and load distribution uniformity without requiring the entire apparatus to be scaled up or made more complex
Solution Approach 2:
The lower jig plate is segmented into multiple regions, and columnar members are installed at specific segments or positions rather than uniformly across the entire plate. This segmentation allows the jig plate to maintain flexibility where needed while providing targeted support where load distribution requires stabilization, thereby avoiding the need to increase the overall rigidity of the entire structure
2Manufacturing precision
If the surface parallelism and flatness of the jig plates are improved to several μm precision, then uniform load can be applied to small elements, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the parameter of load distribution uniformity by introducing columnar members, rather than attempting to achieve uniform load distribution through extremely precise surface geometry (several μm parallelism and flatness). The columnar members compensate for surface irregularities and provide the necessary load distribution, allowing the jig plates to be manufactured with more relaxed tolerance specifications, thereby reducing manufacturing complexity and cost
3Device complexity
If the lower jig plate is made more flexible to accommodate surface variations, then the apparatus size and weight can be reduced, but non-uniform load distribution occurs causing bonding failure
Solution Approach 1:
The lower jig plate is designed with local quality characteristics - it remains flexible in most areas to accommodate surface variations and maintain reduced size and weight, but columnar members are installed at specific local positions where load application requires stabilization. This creates zones of different mechanical properties within the same structure, providing flexibility where needed and rigidity where required for reliable bonding
Data Source
AI summary
A substrate processing apparatus 10 having a lower jig plate 46 for arranging a substrate 2 as an object to be pressurized, a support member 45 including an installation portion 52 for installing columnar members 50 supporting the lower jig plate 46, in which the columnar members 50 are placed to the installation portion 52 in accordance with a in-plane distribution of a load applied to the lower jig plate 46.