X-ray assemblies and coatings

Patent metadata

Field	Value
Publication number	US-9941092-B2
Application number	US-201414559747-A
Country	US
Kind code	B2
Filing date	Dec 3, 2014
Priority date	Dec 3, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

The disclosed subject matter includes devices and methods relating to anode assemblies and/or X-ray assemblies. In some aspects, a method of forming an X-ray assembly may include providing an anode base formed of a first material and including a first end. The method may include depositing a second material different from the first material over a first surface of the anode base to form a coated portion of the anode base. The coated portion may be configured such that some backscattered electrons do not travel beyond the coated portion.

First claim

What is claimed is:

1. A method of forming an X-ray assembly comprising:
providing an anode comprising an anode base formed of a first material and including a first end; and
depositing a second material different from the first material over a first surface of the anode base to form a coated portion of the anode base;
wherein the coated portion is configured such that a majority of electrons backscattered from a target of the anode do not travel beyond the coated portion.

2. The method of claim 1 , the anode base further comprising a taper between a first portion with a first cross-sectional dimension, a second portion with a second cross-sectional dimension greater than the first cross-sectional dimension, wherein the first end is positioned at the first portion.

3. The method of claim 2 , further comprising coupling the target that defines an X-ray emission face at the first end of the anode base prior to forming the coated portion of the anode base, the target including the second material.

4. The method of claim 3 , wherein depositing the second material over the first surface includes depositing the second material over the target, and the method further comprising removing at least a portion of the deposited second material positioned over the X-ray emission face of the target.

5. The method of claim 2 , wherein depositing the second material over the first surface includes depositing the second material over the first end to form the target that defines an X-ray emission face over the first end of the anode base.

6. The method of claim 1 , wherein the coated portion extends from a first limit to a second limit, the second limit configured such that a majority of electrons backscattered from the target of the anode do not travel beyond the coated portion.

7. The method of claim 6 , wherein the first limit is defined at the first end.

8. The method of claim 1 , wherein the coated portion extends from a first limit to a second limit, the coated portion configured such that a majority of electrons backscattered from the target of the anode that rebound less than three times do not travel beyond the coated portion.

9. The method of claim 2 , wherein the coated portion of the anode base includes the first portion, the taper, and the second portion.

10. The method of claim 2 , wherein the coated portion of the anode base includes the first portion, the taper, the second portion, and a second taper proximate the second portion.

11. The method of claim 1 , wherein depositing the second material includes electroplating a precious metal on the first surface of the anode base.

12. The method of claim 1 , wherein depositing the second material includes thermal spraying, plasma spraying, high velocity oxygen fuel spraying, or cold spraying a precious metal or a refractory metal on the first surface of the anode base.

13. The method of claim 1 , wherein depositing the second material includes chemical vapor depositing or physical vapor depositing a precious metal or a refractory metal on the first surface of the anode base.

14. The method of claim 1 , further comprising one or more of:
hot isostatic pressing the deposited second material;
machining the deposited second material;
finishing the deposited second material; and/or
removing at least a portion of the deposited second material.

15. The method of claim 14 , wherein the one or more of the hot isostatic pressing, the machining, the finishing, and/or the removing at least a portion of the deposited second material forms the target defining an X-ray emission face over the first end of the anode base.

16. The method of claim 1 , wherein the first material includes copper and the second material includes one or more of: palladium, silver, rhodium, chromium, titanium, tungsten, molybdenum, aluminum, beryllium, and/or diamond.

17. The method of claim 1 , further comprising forming the target on the first end including a third material different from the first material and the second material.

Assignees

• Varex Imaging Corp

Inventors

• Greenland Kasey Otho
• Miller Robert S

Classifications

• C23C14/24

  Vacuum evaporation · CPC title

• H01J35/18

  Windows · CPC title

• C23C4/12

  characterised by the method of spraying · CPC title

• H01J2235/088

  Laminated targets, e.g. plurality of emitting layers of unique or differing materials · CPC title

• C23C14/14

  Metallic material, boron or silicon · CPC title