Press Roller Pre-Rotation for Wrinkle-Free Adhesive Sheet Pasting
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Solution Overview
Problem
Existing sheet pasting devices face challenges in ensuring smooth adhesion of adhesive sheets onto moving works, such as semiconductor wafers, without forming wrinkles or bubbles.
Innovation Solution
A sheet pasting device comprising a sheet feed unit and a press unit with a rotating press roller that contacts and rotates on the work's attachment surface before pressing the adhesive sheet against it, ensuring continuous adhesion without hindrance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the press roller presses the adhesive sheet against the moving work, then the adhesive sheet is fixed on the work, but wrinkles and bubbles may form due to sudden pressure application
Solution Approach 1:
The press roller performs preliminary rotation on the attachment surface before pressing the adhesive sheet. This preliminary action prepares the surface and ensures smooth contact, preventing wrinkles and bubbles from forming during the actual adhesion process.
Solution Approach 2:
The press roller transitions from a stationary pressing action to a dynamic rotating action. By rotating while pressing, the roller maintains continuous contact with the moving work surface, ensuring uniform pressure distribution and preventing defect formation during adhesion.
2Force
If the press roller is stationary during pressing, then the pressing force is concentrated, but the adhesive sheet cannot advance smoothly
Solution Approach 1:
The press roller is made rotatable to match the movement of the adhesive sheet and work. This dynamic rotation allows the roller to maintain pressing force while advancing smoothly, preventing sheet distortion and ensuring continuous contact during the adhesion process.
Solution Approach 2:
The rotating press roller acts as an intermediary between the stationary pressing mechanism and the moving adhesive sheet/work. Its rotation synchronizes with the sheet advancement, mediating the force application to maintain both pressure and smooth movement.
3Manufacturing precision
If the press roller contacts the work before pressing the sheet, then the adhesion surface is prepared, but the device complexity increases
Solution Approach 1:
The press roller is designed to perform multiple functions: rotating on the attachment surface to prepare it, pressing the adhesive sheet during adhesion, and maintaining continuous contact with the moving work. This multi-functionality reduces the need for separate preparation mechanisms, actually simplifying the overall device structure.
Solution Approach 2:
The surface preparation function and the pressing function are merged into a single press roller operation. The roller's rotation on the attachment surface prepares the surface, and the same roller then presses the adhesive sheet, combining two functions into one component.
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 device effectively prevents wrinkles and bubbles by allowing the adhesive sheet to advance smoothly, ensuring successful and uniform adhesion of the adhesive sheet onto the work.
Implementation Method 1
a press unit that has a press roller for pressing the adhesive sheet against a work and that pastes the adhesive sheet on the work by pressing the adhesive sheet against the work moving relative to the press roller, the press unit bringing the press roller into contact with an attachment surface of the work and rotating the press roller on the attachment surface
Data Source
AI summary
A sheet pasting device EA includes: a sheet feed unit 10 that feeds an adhesive sheet AS; and a press unit 20 that has a press roller 22 for pressing the adhesive sheet AS against a work WK and that pastes the adhesive sheet AS on the work WK by pressing the adhesive sheet AS against the work WK moving relative to the press roller 22, the press unit 20 bringing the press roller 22 into contact with an attachment surface WK1 of the work WK and rotating the press roller 22 on the attachment surface WK1, at a stage before pressing the adhesive sheet AS against the work WK using the press roller 22.