Vertical Mobile Element Integration in Substrate Cavities
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Solution Overview
Problem
The challenge is to create an integrated circuit with a mobile element that is compact in size while maintaining functionality, as the miniaturization trend has led to increased complexity and size due to the integration of discrete electronic or mechanical devices within elementary chips.
Innovation Solution
The solution involves a support substrate with a cavity passing through it, housing a mobile element with an anchoring node and maximum displacement area connected by a perpendicular axis, and electrically connecting elementary chips to the mobile element, allowing for a compact and efficient integration of mobile elements within the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If discrete electronic or mechanical devices are integrated within elementary chips to achieve required functionalities, then the functionality and performance of the integrated circuit are improved, but the size of the elementary chips increases and production methods become more complex
Solution Approach 1:
The patent transitions from two-dimensional planar integration to three-dimensional vertical integration by forming mobile elements that extend through the thickness of the substrate. Etching holes pass through the substrate to create cavities housing mobile elements (switches, resonators) that utilize the vertical dimension, allowing complex functionality to be achieved without increasing the planar footprint or requiring overly complex production methods.
Solution Approach 2:
The patent embeds mobile elements within cavities formed in the substrate, effectively nesting functional components inside the substrate structure. Elementary chips are mounted on both faces of the substrate, creating a nested configuration where the substrate acts as a container for three-dimensional mobile elements while supporting two-dimensional chip arrays on its surfaces.
2Adaptability or versatility
If discrete electronic or mechanical devices are integrated within elementary chips, then the required functionalities are achieved, but the space occupation increases
Solution Approach 1:
The patent exploits the vertical dimension by forming mobile elements that extend through the substrate thickness rather than spreading out in the planar direction. Switches and resonators are positioned vertically within etched cavities, enabling complex functionality to be packed into a compact volume without increasing the chip's planar dimensions.
3Volume of moving object
If mobile elements are integrated in a support substrate with a cavity passing through it, then the mobile element size can be large with excellent performance in a small space, but the structural complexity of the substrate increases
Solution Approach 1:
The patent forms cavities by etching holes through the substrate that house mobile elements in the vertical dimension. This approach allows large mobile elements (such as switches and resonators) to be accommodated within the substrate thickness rather than requiring large planar areas, achieving excellent space efficiency while using standard vertical etching processes.
4Area of stationary object
If elementary chips are integrated on each side of a support substrate, then the surface area is utilized efficiently and the final chip volume remains constant, but the need for complex production methods increases
Solution Approach 1:
The patent divides the integrated circuit into separate functional segments: mobile elements (switches, resonators) are formed within the substrate, while elementary chips containing other circuitry are mounted on the front and back faces. This segmentation allows each component to be optimized and manufactured separately using appropriate processes, then assembled into a compact three-dimensional structure.
Data Source
AI summary
The integrated circuit comprises a support substrate having opposite first and second main surfaces. A cavity passes through the support substrate and connects the first and second main surfaces. The integrated circuit comprises a device with a mobile element, the mobile element and a pair of associated electrodes of which are included in a cavity. An anchoring node of the mobile element is located at the level of the first main surface. The integrated circuit comprises a first elementary chip arranged at the level of the first main surface and electrically connected to the device with a mobile element.