Wafer Debonding Apparatus Using Shear Force Paddle
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Solution Overview
Problem
Current wafer debonding processes face challenges in efficiently separating wafers from carrier plates without causing damage, particularly when the carrier plate is larger than the wafer, as existing methods can be costly, complex, and may result in wafer cracking or incomplete separation.
Innovation Solution
A debonding apparatus and method that utilize a base with a recess and a paddle with guiding features to apply a shear force to the carrier plate, while the wafer is held in place by suction, allowing for controlled separation without direct contact, and a chuck design that uses vacuum suction to pull the wafer away from the carrier plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If heating is applied to soften the adhesive for debonding, then the separation process becomes easier, but the operational complexity and time required increase
Solution Approach 1:
The adhesive is pre-heated to a temperature sufficient to soften it before the actual separation action is applied. This preliminary heating action prepares the adhesive layer in advance, allowing the subsequent mechanical separation to proceed easily and quickly without requiring prolonged heating during the separation process itself.
2Productivity
If a paddle is used to apply shear force to the plate, then the separation efficiency improves, but the device complexity increases
Solution Approach 1:
The separation apparatus is divided into distinct functional components: a base that provides support and positioning features, and a separate paddle that applies the shear force. This segmentation allows each component to be optimized for its specific function while keeping the overall structure relatively simple and manageable.
Solution Approach 2:
The base includes integrated guiding features and positioning structures that automatically guide the paddle's motion and ensure proper alignment during the separation process. This self-guiding capability reduces the need for additional complex control mechanisms while maintaining high separation efficiency.
3Manufacturing precision
If the paddle is guided by guiding features on the base, then the precision of separation improves, but the manufacturing complexity increases
Solution Approach 1:
The guiding features are integrated directly into the base structure rather than being separate components. This merging of the guiding function into the base itself simplifies the overall manufacturing process by reducing the number of parts that need to be produced and assembled, while still providing the necessary precision for paddle guidance.
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 enables efficient, damage-free separation of wafers from carrier plates, improving yield and reducing operational complexity and costs by allowing for precise control of the separation process.
Implementation Method 1
a chuck design that uses vacuum suction to pull the wafer away from the carrier plate
Implementation Method 2
The first recess has a lateral dimension that is sufficiently large to accommodate a wafer joined to a plate as an assembly. The side wall's height can be less than or equal to the wafer's thickness. The base can further include at least one guiding feature. The apparatus further includes a paddle dimensioned to be guided by the at least one guiding feature, such that when the assembly is positioned on the base with the wafer received by the recess, the paddle is capable of engaging an edge of the plate to provide a shear force to the plate
Data Source
AI summary
Disclosed are systems, devices and methodologies for handling wafers in wafer processing operations through use of wafer carriers. In an example situation, a wafer carrier can be configured as a plate to allow bonding of a wafer thereto to provide support for the wafer during some processing operations. Upon completion of such operations, the processed wafer can be separated from the support plate so as to allow further processing. Various devices and methodologies related to such wafer carriers for efficient handling of wafers are disclosed.