Edge Bond Pad Structures for Integrated MEMS and IC Yields
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Solution Overview
Problem
Conventional microelectromechanical systems (MEMS) and integrated circuit (IC) technologies face challenges in increasing performance, reducing size, and decreasing cost, while also requiring more complex microsystems with greater computational power, which are not adequately addressed by existing fabrication methods.
Innovation Solution
A method for fabricating integrated electronic devices using edge bond pads, involving the formation of passivation and conduction materials overlying MEMS devices on a substrate, with trench structures and bond pad formation through a singulation process, allowing for easier integration and higher device yields without significant modifications to conventional equipment or processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional MEMS fabrication methods are used, then device performance can be maintained, but integration complexity increases and device yields decrease
Solution Approach 1:
The patent combines MEMS devices and electronic circuitry onto a single substrate, merging previously separate fabrication processes into an integrated structure. This consolidation reduces the number of discrete components and interconnections needed, thereby decreasing integration complexity while improving device yields through unified manufacturing.
Solution Approach 2:
The substrate serves multiple functions simultaneously: it acts as the mechanical support for MEMS structures, the electrical foundation for electronic circuits, and the integration platform for both systems. This multi-functionality eliminates the need for separate substrates and reduces overall system complexity.
2Productivity
If device size is reduced to increase density, then more devices fit on a chip, but fabrication precision requirements increase
Solution Approach 1:
The patent utilizes three-dimensional vertical structures within the substrate, stacking MEMS and electronic components in multiple layers rather than arranging them only in a planar two-dimensional layout. This vertical integration increases device density without requiring proportionally smaller feature sizes, thereby maintaining feasible fabrication precision requirements.
3Adaptability or versatility
If computational power is increased in microsystems, then system capability improves, but device complexity and fabrication difficulty increase
Solution Approach 1:
The patent integrates electronic circuitry directly with MEMS structures on the same substrate, allowing computational functions to be embedded alongside sensing and actuation elements. This merging enables increased computational power within the microsystem while managing complexity through unified architecture and shared fabrication processes.
Data Source
AI summary
A monolithic integrated electronic device includes a substrate having a surface region and one or more integrated micro electro-mechanical systems and electronic devices provided on a first region overlying the surface region. Each of the integrated micro electro-mechanical systems and electronic devices has one or more contact regions. The first region has a first surface region. One or more trench structures are disposed within one or more portions of the first region. A passivation material overlies the first region and the one or more trench structures. A conduction material overlies the passivation material, the one or more trench structures, and one or more of the contact regions. The device also has one or more edge bond pad structures within a vicinity of the one or more bond pad structures, which are formed by a singulation process within a vicinity of the one or more bond pad structures.