Exploding Foil Initiator Chip with Integrated Non-Planar Switch

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Solution Overview

Problem

Existing initiators with exploding foil initiator (EFI) chips require costly and bulky discrete switch devices for multiple mode functionality, which are difficult to package due to their size and weight.

Innovation Solution

An initiator with an integrated exploding foil initiator and a first switch, where the switch includes a conductive bridge and a first insulator, allowing for multiple mode operation by transmitting electrical energy through the insulator, enabling compact and lightweight design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If discrete switch devices are used for multiple mode functionality, then the initiator can operate in multiple modes, but the device becomes bulky, heavy, and difficult to package

Engineering Contradiction:

Improvemultiple mode functionalityVSAvoidpackaging size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent integrates the switch device directly into the substrate chip, merging previously separate components (substrate, bridge, and switch) into a single integrated structure. This eliminates the need for discrete switch devices and reduces overall packaging requirements while maintaining multiple mode functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated switch structure on the substrate chip provides multiple mode functionality (standard mode and alternative modes) within a single compact device, allowing one component to perform multiple functions that previously required separate discrete devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If discrete switch devices are used for multiple mode functionality, then the initiator can operate in multiple modes, but the cost increases

Engineering Contradiction:

Improvemultiple mode functionalityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

By combining the switch functionality directly into the substrate chip fabrication process, the patent eliminates the need to source, assemble, and package separate discrete switch devices, thereby reducing manufacturing complexity and cost.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The substrate chip serves multiple functions simultaneously - it provides both the mounting surface for the bridge and the integrated switch structure, eliminating the need for separate components and reducing overall system cost.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If discrete switch devices are used, then multiple mode operation is enabled, but the device weight increases

Engineering Contradiction:

Improvemultiple mode operationVSAvoiddevice weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The integration of the switch structure directly onto the substrate chip eliminates the need for separate discrete switch devices, thereby reducing the overall weight of the initiator while maintaining multiple mode operational capabilities.

Inventive Principle:

Principle #5Merging (Combining)

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

The solution provides a cost-effective and compact initiator capable of multiple mode triggering, with sealed switches that are not affected by foreign particles and can handle high electric potentials without misdirection, enhancing packaging efficiency and functionality.

Implementation Method 1

The first switch is operable in an actuated mode in which electrical energy transmitted between the first contact and the first bridge contact is transmitted through the first insulator

Methodology Applied

Scientific EffectDielectric breakdown: Dielectric

Implementation Method 2

the power source provides sufficient electric current to convert the bridge from a solid state to a plasma

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 3

convert the bridge from a solid state to a plasma. The pressure of the plasma drives a flyer into contact with an explosive charge

Methodology Applied

Scientific EffectPlasma formation: Plasma

Data Source

PatentUS7581496B2Exploding foil initiator chip with non-planar switching capabilities

Publication Date: 2009.09.01 REYNOLDS SYST

AI summary

An initiator that includes a substrate, an exploding foil initiator and a first switch. The exploding foil initiator coupled to the substrate and includes a bridge and a first bridge contact. The first switch has a first contact and a first insulator. The first contact is coupled to the substrate and spaced apart from the first bridge contact by a gap. The first insulator is disposed in the gap. The first switch is operable in an actuated mode in which electrical energy transmitted between the first contact and the first bridge contact is transmitted through the first insulator.