Vacuum Transfer Arm and Support Block for Flat Substrate Mounting
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Solution Overview
Problem
Semiconductor substrates tend to deform or warp during manufacturing, leading to sagging and curvature issues that affect subsequent processing steps, resulting in reduced yield and functionality in semiconductor packages.
Innovation Solution
An improved substrate mounting apparatus is introduced, comprising a bottom support block that can be actuated to match the level of side supports and a transfer arm module with a vacuum pickup head to flatten and maintain substrates in a flat state, combined with a printing pallet that uses clips and apertures to secure substrates during screen printing, preventing further deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If substrates are transported on a conveyer system with side supports, then substrates can be moved through manufacturing processes, but thin substrates deform or warp and sag between supports
Solution Approach 1:
The support system is segmented into multiple discrete support blocks positioned at specific intervals along the conveyer path, rather than continuous side supports. This segmentation allows the substrate to be supported at critical points without excessive constraint that would cause sagging between supports.
Solution Approach 2:
A bottom support block is introduced as an intermediary element that provides additional support from beneath the substrate, working in conjunction with the side supports to prevent warping without requiring the substrate to span large distances between support points.
2Productivity
If substrates are supported by lateral parallel side supports, then substrates can be conveyed through manufacturing, but substrate deformation creates problems for subsequent manufacturing steps
Solution Approach 1:
The substrate is flattened and positioned on the bottom support block before being picked up by the transfer arm module. This preliminary flattening action ensures the substrate is in the correct state before subsequent manufacturing steps, preventing deformation issues during screen printing and other precision operations.
Solution Approach 2:
The vacuum-based transfer arm module replaces traditional mechanical contact-based handling systems. The vacuum pickup head can grasp and transfer substrates without physical contact points that would cause deformation, maintaining substrate flatness throughout the manufacturing process.
3Ease of manufacture
If substrates are handled using traditional conveyer systems, then manufacturing processes can proceed, but substrate warpage reduces yield and functionality
Solution Approach 1:
The bottom support block acts as an intermediary that actively corrects substrate warpage by providing upward support force, ensuring substrates maintain proper flatness for functional operations while allowing continuous manufacturing processes to proceed without interruption.
Solution Approach 2:
The system changes the physical state of substrate support from passive lateral constraints to active bottom support with vacuum holding, transforming how substrates are maintained during handling to preserve their functional integrity throughout the manufacturing process.
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 corrects substrate warpage, ensures proper positioning for manufacturing processes, and reduces errors, thereby enhancing the reliability and yield of semiconductor packages by maintaining substrates in a flat state throughout processing.
Implementation Method 1
a vacuum pickup head to flatten and maintain substrates in a flat state
Data Source
AI summary
A manufacturing system includes a substrate disposed on a conveyer system. The conveyer system includes a pair of side supports. The substrate is moved on the conveyer system until the substrate is disposed over a bottom support block. The bottom support block is raised to physically contact the substrate. A transfer arm module is provided. The transfer arm module includes a flat bottom surface and an opening formed in the flat bottom surface. The transfer arm module is disposed with the flat bottom surface physically contacting the substrate opposite the bottom support block. A vacuum is enabled through the opening of the transfer arm module. The substrate is lifted off the bottom support block using the vacuum. The substrate is moved over a printing pallet using the transfer arm module. The vacuum is disabled when the substrate is in a positioning area of the printing pallet.