GaN X-ray Target Phonon Heat Conduction

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Solution Overview

Problem

Traditional solid X-ray targets face limitations due to poor thermal properties, which lead to overheating and inadequate control over X-ray radiation quality, and are not suitable for studying certain material systems like silicon-based structures.

Innovation Solution

A solid X-ray target comprising a compound formed from a trivalent element capable of generating X-ray radiation and a pentavalent element, with phonon-dominated heat conduction, enhancing both X-ray emission energy and thermal management properties, such as gallium nitride or gallium arsenide, which offer improved heat dissipation and higher melting points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If traditional solid anode materials like tungsten or copper are used to maximize X-ray yield, then the X-ray radiation generation is improved, but the thermal properties (heat capacity, thermal conductivity, melting point) are limited leading to overheating and target consumption

Engineering Contradiction:
ImproveX-ray radiation generationVSAvoidthermal properties
Core Design Contradiction:
PowerVSTemperature

Solution Approach 1:

The patent employs composite materials by forming a compound between a trivalent element (such as gallium) and a pentavalent element (such as arsenic). This compound combines the high atomic number of the trivalent element for effective X-ray generation with the superior thermal properties of the pentavalent element, resolving the contradiction between X-ray yield and thermal management.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent changes the material parameters by selecting specific combinations of trivalent and pentavalent elements that optimize both X-ray generation efficiency and thermal properties. By adjusting the elemental composition and stoichiometry of the compound, the patent achieves a balance between maximizing X-ray yield and ensuring adequate heat dissipation and thermal stability.

Inventive Principle:
Principle #35Parameter changes

2Adaptability or versatility

If traditional X-ray targets like tungsten or copper are used, then general X-ray generation is achieved, but the radiation is not suitable for studying silicon based systems comprising copper structures due to poor contrast

Engineering Contradiction:
Improvesuitability for specific material systemsVSAvoidimaging contrast
Core Design Contradiction:
Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by selecting specific elemental combinations (trivalent and pentavalent elements) that are optimized for particular application scenarios, such as silicon-based systems. The compound's composition can be tailored to produce X-ray radiation with energy characteristics that provide optimal contrast for specific material systems, rather than using a universal material like tungsten for all applications.

Inventive Principle:
Principle #3Local quality

3Temperature

If pure elements like gallium or arsenic are used as solid anode target materials, then the thermal properties are improved, but the ability to produce X-ray radiation is limited

Engineering Contradiction:
Improvethermal propertiesVSAvoidX-ray radiation generation
Core Design Contradiction:
TemperatureVSPower

Solution Approach 1:

The patent merges the advantages of both trivalent and pentavalent elements by forming a compound between them. The trivalent element contributes to high atomic number and effective X-ray generation, while the pentavalent element provides superior thermal properties. This merging of two element types into a single compound resolves the contradiction between thermal performance and X-ray generation capability.

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 enables the production of X-ray radiation with suitable energy for specific applications, like silicon-based systems, while maintaining effective heat management, thereby improving X-ray imaging contrast and extending target durability.

Implementation Method 1

a first one of said materials is capable of generating the X-ray radiation upon interaction with an electron beam

Methodology Applied
Scientific EffectX-ray radiation generation: X-Ray

Implementation Method 2

heat conduction between the first and second region is dominantly phonon heat conduction

Methodology Applied
Scientific EffectPhonon heat conduction: Conduction (thermal)

Data Source

PatentUS10971323B1Semiconductor X-ray target
Publication Date: 2021.04.06 EXCILLUM
  • US10971323B1 patent drawing
  • US10971323B1 patent drawing
  • US10971323B1 patent drawing

AI summary

A solid X-ray target for generating X-ray radiation is disclosed. The X-ray target includes at least one material selected from a list including trivalent elements; and at least one material selected from a list including pentavalent elements, wherein a first one of the materials is capable of generating the X-ray radiation upon interaction with an electron beam, and a second one of the materials forms a compound with the first one of the materials. An X-ray source including such an X-ray target and an electron source is also disclosed.