MEMS Solder Couplings for Direct Electrical and Physical Integration
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Solution Overview
Problem
MEMS devices face challenges in integrating with various form factors and miniaturized devices, requiring efficient electrical and physical connections while minimizing space and reducing complexity.
Innovation Solution
A MEMS device design with a layered structure featuring a shelf and solder couplings that extend beyond the upper surface, allowing direct electrical and physical connections to external components, eliminating the need for intermediate packaging layers and reducing overall size and manufacturing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional intermediate packaging layers are used to connect MEMS devices to external components, then reliable electrical and physical connections are achieved, but device size increases and manufacturing complexity increases
Solution Approach 1:
The patent removes the intermediate packaging layer from the traditional MEMS device structure. The solder couplings are directly formed on the MEMS device layers (first layer upper surface, second layer upper surface, or third layer edge surface) to connect with external components, eliminating the need for separate packaging layers while maintaining reliable electrical and physical connections.
Solution Approach 2:
The patent combines the electrical connection function and physical connection function into a single integrated structure. The solder couplings serve dual purposes: providing electrical signal paths from MEMS components to external components while simultaneously providing mechanical support and physical attachment, replacing the need for separate packaging layers that performed both functions.
2Reliability
If traditional intermediate packaging layers are used to connect MEMS devices to external components, then reliable electrical and physical connections are achieved, but manufacturing steps and cost increase
Solution Approach 1:
The patent eliminates the intermediate packaging layer manufacturing process. Solder couplings are directly formed on the MEMS device layers using standard semiconductor fabrication techniques (electroplating, sputtering, or evaporation), removing the need for separate packaging layer deposition, patterning, and bonding steps.
Solution Approach 2:
The solder couplings are designed to perform multiple functions simultaneously: electrical signal transmission, mechanical support, and physical attachment to external components. This multi-functionality reduces the number of manufacturing steps required compared to traditional packaging approaches that required separate layers for each function.
3Device complexity
If solder couplings extend beyond the upper surface to form direct connections, then device integration is simplified and size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The solder couplings are formed during the MEMS device fabrication process itself, before the device is assembled with external components. This preliminary formation of connection points ensures precise alignment and eliminates the need for post-fabrication alignment operations, reducing manufacturing precision requirements during final assembly.
Solution Approach 2:
The solder couplings act as intermediary structures that bridge the MEMS device layers and external components. By providing pre-formed, precisely positioned connection points on the MEMS device layers, they facilitate easy integration with external components while maintaining manufacturing precision through standard fabrication processes.
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 design enables compact integration of MEMS devices with other components, reducing size, cost, and fabrication complexity while ensuring secure and efficient signal transmission.
Implementation Method 1
a plurality of solder couplings, where each of the plurality of solder couplings is bonded to one of the plurality of electrical connection points
Data Source
AI summary
A MEMS device, comprising a plurality of stacked layers, includes a plurality of solder couplings that mechanically fasten and electrically couple the MEMS device to an external component. The plurality of solder couplings is connected atop a portion of an upper surface that extends past an edge surface of a MEMS layer to form a shelf and are electrically connected via the shelf to receive signals generated by the MEMS device. These signals are provided to the external component via the solder couplings.