Patterned Chuck Structure for Double-Sided Microstructured Substrates
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Solution Overview
Problem
Conventional substrate chucking apparatuses often damage microstructures on the backside of substrates during processing, as they lack effective support mechanisms for substrates with microstructures on both the front and back sides.
Innovation Solution
A substrate chucking apparatus with a body featuring recessed cavities and support elements, along with vacuum and electrostatic chucking mechanisms, is designed to securely hold substrates with microstructures, using ports and conduits for differential pressure control and electrostatic forces to prevent damage and ensure flatness during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional chucking apparatus are used to hold substrates during processing, then the substrate can be securely held, but microstructures on the backside of the substrate are damaged
Solution Approach 1:
The chucking apparatus is segmented into multiple independent cavities, each capable of holding the substrate at different locations. This segmentation allows the substrate to be supported at multiple points simultaneously, preventing damage to microstructures on the backside while maintaining secure holding during processing.
Solution Approach 2:
Different regions of the chucking apparatus have different properties - cavities provide containment while support elements provide localized support. The support elements are specifically positioned to contact only the flat backside of the substrate, providing localized support exactly where needed without affecting microstructures on the front side.
2Adaptability or versatility
If substrates with microstructures on both front and back sides are processed, then advanced device fabrication is enabled, but handling and supporting becomes challenging
Solution Approach 1:
The apparatus is divided into multiple cavities and support elements that can independently function. This segmentation allows the system to adapt to substrates with microstructures on both sides by providing distributed support points, enabling double-sided processing without requiring a completely new apparatus design.
Solution Approach 2:
The chucking apparatus is designed with multi-functionality to handle various substrate configurations. The combination of cavities and support elements creates a universal holding mechanism that can securely hold substrates whether they have microstructures on one side, both sides, or neither side, reducing the need for specialized apparatus for different processing scenarios.
3Object-affected harmful factors
If the substrate backside is supported during front side processing, then microstructure damage is prevented, but substrate flatness may be compromised
Solution Approach 1:
The support elements provide localized support at specific points on the substrate backside, while the cavities provide overall containment. This local quality approach ensures that support is applied only where needed to prevent microstructure damage, while the distributed nature of the support elements maintains substrate flatness by preventing localized deformation.
Solution Approach 2:
The chucking apparatus can dynamically adjust the distribution of support forces through its cavity and support element structure. This dynamic capability allows the system to maintain substrate flatness during processing while simultaneously providing support to prevent microstructure damage, adapting to the specific mechanical properties of the substrate being processed.
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 apparatus effectively supports substrates with microstructures on both sides, preventing damage and ensuring flatness and precise processing, enabling advanced fabrication techniques for waveguide apparatus and other devices.
Implementation Method 1
using ports and conduits for differential pressure control
Implementation Method 2
electrostatic chucking mechanisms... using electrostatic forces to prevent damage and ensure flatness
Data Source
AI summary
Embodiments described herein relate to a substrate chucking apparatus having a plurality of cavities formed therein. The cavities are formed in a body of the chucking apparatus and a plurality of support elements extend from the body and separate each of the plurality of cavities. In one embodiment, a first plurality of ports are formed in a top surface of the body and extend to a bottom surface of the body through one or more of the plurality of support elements. In another embodiment, a second plurality of ports are formed in a bottom surface of the plurality of cavities and extend through the body to a bottom surface of the body. In yet another embodiment, a first electrode assembly is disposed adjacent the top surface of the body within each of the plurality of support elements and a second electrode assembly is disposed within the body adjacent each of the plurality of cavities.