Workpiece Tape Color Change Layer for Cooling Detection
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Solution Overview
Problem
Existing workpiece units do not allow workers to visually determine if sufficient cooling has been applied, leading to potential failures during the division process due to stretched-out tapes that cannot be further expanded.
Innovation Solution
Incorporating a tape with a color-changing thermochromic ink that changes color in response to temperature changes, enabling workers to visually confirm if the cooling process has been completed by observing the tape's color change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the tape is expanded without sufficient cooling, then the workpiece can be processed, but the ductile elements cannot be divided properly and the tape becomes stretched out
Solution Approach 1:
The patent applies a temperature-sensitive color change layer on the tape that changes color when the tape reaches the required cooling temperature. This visual indicator allows workers to confirm proper cooling before expansion, ensuring ductile elements can be divided successfully without tape stretching or process failure.
2Ease of operation
If the tape is expanded before sufficient cooling, then the process can proceed, but the tape stretches out and cannot be expanded again for proper division
Solution Approach 1:
The patent implements preliminary cooling verification through color change indication before the tape expansion process. The color change layer provides advance visual confirmation that the tape has reached the required temperature state, preventing premature expansion and ensuring the tape maintains its expansion capability for proper workpiece division.
3Temperature
If cooling is applied without visual indication, then the temperature can be reduced, but workers cannot determine if cooling is sufficient
Solution Approach 1:
The patent incorporates a color change layer that provides clear visual indication of the tape's temperature state. When the tape reaches the required cooling temperature, the color change layer changes color, allowing workers to easily detect and confirm sufficient cooling without complex measurement equipment or procedures.
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
This solution allows workers to easily determine if the cooling process has been performed, preventing division failures by ensuring the ductile elements have reached the required temperature for efficient division.
Implementation Method 1
the tape reversibly changes in color in response to an external stimulus... the tape changes in color to a first color at a first temperature and changes in color to a second color different from the first color at a second temperature different from the first temperature
Data Source
AI summary
A workpiece unit includes a wafer, a tape attached to the wafer, and an annular frame to which an outer peripheral edge of the tape is attached and having an opening in a center of the annular frame, and the workpiece unit has the wafer positioned in the opening of the annular frame through the tape. In the workpiece unit, the tape has a color change layer that reversibly changes in color in response to a change in temperature caused by cooling.