Housed Active Microstructures Direct Substrate Contact

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Solution Overview

Problem

Current microsystem components, particularly microsensors and semiconductor circuits, face challenges in electrical connection complexity, sensitivity to environmental factors, and cost-effective fabrication due to their small size and sensitivity, requiring efficient protection and integration methods while maintaining signal integrity.

Innovation Solution

A microstructured component with housed active microstructures, featuring a substrate with electrical conductor tracks and semiconductor circuits, where active structures are electrically contacted through the housing to the substrate, allowing for compact and cost-effective production with reduced fabrication complexity and environmental protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate cover chips are connected to a wafer containing active structures, then hermetic protection is achieved, but device complexity and fabrication cost increase

Engineering Contradiction:

Improvehermetic protectionVSAvoidconnection complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the cover chip and the wafer containing active structures into a single integrated unit. The housing is formed as one piece that encloses the active structures directly, eliminating the need for separate cover chips and reducing the number of connection steps while maintaining hermetic protection.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing serves multiple functions simultaneously: it provides hermetic protection, acts as the structural enclosure, and integrates the electrical connection interface. This multi-functionality reduces the overall device complexity by consolidating multiple components into a single universal structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If numerous electrical connections are made between sensor elements and evaluation circuit, then complete functionality is achieved, but manufacturing precision and cost increase

Engineering Contradiction:

Improvefunctional completenessVSAvoidconnection precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent extracts the electrical connection interface from the interior of the housing and positions it on the outer surface of the housing. This allows connections to be made from the outside, simplifying the manufacturing process and reducing the precision requirements for internal alignment while maintaining complete electrical functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The housing acts as an intermediary structure that facilitates electrical connections between the active structures and the external evaluation circuit. By providing connection points on its outer surface, the housing mediates the complex internal connections in a simplified manner that reduces manufacturing precision requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If microsensor components are protected from environmental effects, then reliability improves, but integration difficulty increases

Engineering Contradiction:

Improveenvironmental protectionVSAvoidintegration ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the protection function and the integration function into a single housing structure. The housing simultaneously provides environmental protection for the active structures and facilitates integration with external systems through its design features, such as outer surface connection points and compact geometry.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8129838B2Housed active microstructures with direct contacting to a substrate

Publication Date: 2012.03.06 FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV

AI summary

A microstructured component with microsensors or other active microcomponent is provided. The microstructured component includes a substrate and at least one housing arranged on the substrate with one or more active microstructures situated on it.