Wafer-Level Damper Structures via Edge Adhesive Film Molding
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Solution Overview
Problem
Existing methods for producing damper structures on micromechanical wafers are complex and costly, requiring precise and repetitive adhesive bonding and positioning, which complicates the assembly process.
Innovation Solution
A method involving an edge adhesive film and a molding wafer with a molding structure, where the adhesive film is applied and joined to the molding wafer under low pressure, filled with adhesive, cured, and then bonded to a micromechanical wafer, allowing for direct molding and precise alignment of damper structures on the wafer level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional adhesive bonding and positioning methods are used for each sensor-damper pair, then precise alignment can be achieved, but the assembly process becomes complex and expensive
Solution Approach 1:
The patent segments the assembly process into two distinct stages: (1) wafer-level parallel production of multiple damper structures on a single wafer, and (2) individual sensor-damper pairing. This segmentation allows complex precision work to be done once at the wafer level rather than repeatedly for each pair, reducing overall process complexity while maintaining alignment precision.
Solution Approach 2:
The patent performs preliminary action by pre-positioning and pre-aligning multiple damper structures on a single wafer before the actual sensor integration. The alignment structures are created in advance, and the damper structures are precisely positioned relative to each other and to the wafer coordinates system before any individual sensor mounting occurs. This preliminary precision work eliminates the need for repeated alignment operations.
2Productivity
If wafer-level production of damper structures is implemented, then productivity increases, but new manufacturing steps and equipment are required
Solution Approach 1:
The patent applies universality by using a single wafer to serve multiple functions: as the substrate for mounting multiple dampers, as the alignment reference for all damper structures, and as the final carrier for sensor integration. The same wafer processing equipment and alignment infrastructure used in standard MEMS fabrication are leveraged for damper production, eliminating the need for entirely new manufacturing steps while achieving parallel production of multiple dampers.
3Manufacturing precision
If individual positioning is performed for each sensor-damper pair, then exact alignment is achieved, but production time and cost increase
Solution Approach 1:
The patent merges multiple individual positioning operations into a single wafer-level operation. Instead of positioning each damper structure individually for each sensor, all damper structures are positioned and aligned simultaneously on the wafer using a unified coordinate system and shared alignment structures. This merging of operations maintains positioning accuracy while dramatically reducing the total time required, as the alignment work is performed once rather than repeatedly.
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 approach simplifies and cost-reduces the production of damper structures, enabling precise and repeatable alignment for multiple sensors, reducing the complexity of individual sensor-damper pair assembly and allowing tailored damping characteristics.
Implementation Method 1
Applying the edge adhesive film to the first side of the molding wafer at a low atmospheric pressure
Implementation Method 2
Irradiating the adhesive with ultraviolet light before the curing
Data Source
AI summary
A method for producing damper structures on a micromechanical wafer. The method includes: (A) providing an edge adhesive film and a molding wafer, which includes a first side having a molding structure; (B) applying the edge adhesive film to the first side of the molding wafer at a low atmospheric pressure; (C) joining the edge adhesive film to the first side of the molding wafer by increasing the atmospheric pressure; (D) filling the molding structures with an adhesive; (E) curing the adhesive to form damper structures; (F) bonding the damper structures to a second side of a micromechanical wafer.