KR20160094563A - Anode electrode for cover type - Google Patents

Abstract

A cover type anode electrode comprises: a first member including a protrusion part formed to protrude from one side thereof; a second member formed to surround the protrusion part; and an adhesive accommodated between the first and second members. Therefore, the cover type anode electrode can solve an outgassing problem in case of bonding.

Description

[0001] The present invention relates to an anode electrode,

An embodiment in accordance with the inventive concept relates to a lid-shaped anode, particularly to a lid-shaped anode of an x-ray tube consisting of a metal base material portion including projections and a lid portion formed to receive the projections.

X-rays, which are widely used for medical, industrial, and research purposes, can be obtained by colliding electrons with a high energy to a metal anode target. As the electron source used for high energy, there is a thermoelectric material which induces electron emission by heating a metal material and a field emission electron source using nanomaterials.

Among the electron sources, thermoelectric resources have a relatively short life span and are not easy to reduce their size, so that they are difficult to be integrated and miniaturized. In addition, thermoelectric sources must emit electrons in bipolar form, which makes it difficult to control the intensity of x-rays.

On the other hand, in the case of a field emission electron using a nanomaterial, it can be formed into a three-pole type and various electrical and physical forms, thereby facilitating integration and miniaturization. In addition, the field emission electron source can generate a high output x-ray as compared with the thermoelectric source, and it is easy to control the intensity of the x-ray relatively.

The metal target of the anode electrode collides with the electron beam to generate x-rays. If the anode electrode is defective, the x-ray tube can not be properly generated as an x-ray tube. Thus, the method of forming the metal target on the anode electrode is an important part of the x-ray tube.

Conventionally, a method of forming an anode electrode is divided into a method of forming a metal target directly on an anode electrode by chemical vapor deposition, and a method of bonding a metal target by using an inorganic filler or the like.

1 is a cross-sectional view showing an anode electrode of an X-ray tube to which a metal target is bonded using a conventional chemical vapor deposition method or an inorganic filler.

1, the anode electrode 100 may be formed by depositing a metal target 130, such as tungsten or molybdenum, having good thermal conductivity by using metals having good thermal conductivity as a base material 110, The metal target 130 may be bonded to the metal target 130 at a high temperature.

These methods are widely used in thermoelectric resource-based X-ray tubes and the like because they are excellent in ease of processing for forming the anode electrode 100. However, the anode electrode 100 on which the metal target 130 is deposited requires a long deposition time, and the adhesive force of the base material 110 is decreased according to the deposition thickness, so that separation phenomenon may occur in the event of continuous collision with the electron beam. Accordingly, such a method lowers the degree of vacuum and forms a plasma, which shortens the life of the X-ray tube.

In order to offset such a problem, there is a method of joining a massive target by using an inorganic filler or the like, but an empty space may be generated at the joining portion. When an air layer is formed in an empty space, the inorganic filler flows to the surface of the anode electrode due to the capillary phenomenon.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an X-ray tube field emission source comprising an anode electrode including a protrusion and a cover- Type anode electrode which is joined to the anode electrode by using the anode electrode.

A cover-type anode electrode according to an embodiment of the present invention includes a first member including a protrusion formed to extend to one side, a second member formed to surround the protrusion, and a second member formed between the first member and the second member Containing adhesive.

In the cover type anode electrode according to the embodiment of the present invention, since the metal target and the anode electrode are bonded using the inorganic filler, the side space outside the bonding surface can be eliminated. This can solve the problem of outgassing that occurs at the time of bonding.

In addition, the cover type anode electrode according to the embodiment of the present invention forms a recess around the bonding surface to prevent the excess inorganic filler that is not received between the metal target and the anode electrode from being exposed to the surface due to the capillary phenomenon.

In addition, the cover type anode electrode according to the embodiment of the present invention can solve the problem of outgasing occurring at the time of bonding due to tens to several hundred micro gap generated due to the volume of the adhesive between the bonding surfaces of the metal target and the anode electrode have.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to more fully understand the drawings recited in the detailed description of the present invention, a detailed description of each drawing is provided.
1 is a cross-sectional view showing an anode electrode of an X-ray tube to which a metal target is bonded using a conventional chemical vapor deposition method or an inorganic filler.
2 is a cross-sectional view of a lid type anode electrode according to an embodiment of the present invention.
3A is a side view of a lid type anode electrode according to an embodiment of the present invention.
3B and 3C are perspective views of a lid type anode electrode according to an embodiment of the present invention.

It is to be understood that the specific structural or functional description of embodiments of the present invention disclosed herein is for illustrative purposes only and is not intended to limit the scope of the inventive concept But may be embodied in many different forms and is not limited to the embodiments set forth herein.

The embodiments according to the concept of the present invention can make various changes and can take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. It should be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms disclosed, but includes all modifications, equivalents, or alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element may be referred to as a second element, The component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like are used to specify that there are features, numbers, steps, operations, elements, parts or combinations thereof described herein, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

FIG. 2 is a cross-sectional view of a lid type anode electrode according to an embodiment of the present invention, FIG. 3A is a side view of a lid type anode electrode according to an embodiment of the present invention, FIGS. 3B and 3C are cross- Type anode electrode according to the present invention.

Referring to FIGS. 2 to 3C, a cover-type anode electrode 200 according to an embodiment of the present invention includes a first member 210, a second member 230, and an adhesive 220.

The first member 210 may be made of a metal having good thermal conductivity, and may be combined with the second member 230, which is a metal target. The first member 210 may be coupled with the second member 230 to generate X-rays from an electron beam incident from the outside.

The first member 210 may include a protrusion 216 formed to extend to one side.

For example, when the first member 210 viewed from the side is in the T shape, the laterally extending portion is the upper end 212 of the first member 210 and extends in the longitudinal direction at the center of the upper end 212 Portion may be the lower end 214 of the first member 210. Here, the protrusion 216 may be any part of the lower end 214.

According to an embodiment, the protrusion 216 may be implemented in the form of a cylinder, a rectangular parallelepiped, a sphere, a cone, or the like, but is not limited thereto.

One side 216-1 of the protrusion may be formed in various shapes. According to the embodiment, one side 216-1 of the projection may be formed in a diagonal direction, e.g., a direction that is not parallel to one side 212-1 of the upper end of the first member.

The first member 210 may include a recess 218 formed along a side surface of the protrusion 216. The recess 218 may also be formed in the lower end 214 in a direction extending from the lower end 214 to the upper end 212.

For example, if the protrusion 216 is cylindrical, the recess 218 may be formed along the arc surface of the protrusion 216.

According to the embodiment, the concave portion 218 may be formed in various shapes such as a V-shape and a U-shape.

The second member 230 collides with an electron beam incident from the outside to generate x-rays. For example, the second member 230 may be formed of a metal such as tungsten, molybdenum, or the like, but is not limited thereto.

The second member 230 may include an insert 232 configured to enclose the protrusion 216 for insertion of the protrusion of the first member 210. For example, the insertion portion 232 may be formed on the inner side of the second member 230 so as to be parallel to one side 216-1 of the projection.

One side 234 of the second member collides with the electron beam incident from the outside. That is, one side 234-1 of the second member can be heated by collision with the electron beam to emit x-rays.

One side 234 of the second member may be formed in various shapes. According to an embodiment, one side 234 of the second member may be formed in an oblique direction, for example, parallel to one side of the protrusion, but is not limited thereto.

According to another embodiment, when one side 234 of the second member is formed in a diagonal direction, any portion 236 of one side 234 of the second member may be formed with a different slope from the diagonal direction have. For example, if one side 234 of the second member is formed to be parallel to one side 216-1 of the protrusion, any portion 236 may be formed in a direction not parallel to one side 216-1 of the protrusion .

The adhesive 220 is adhered between the protruding portion of the first member 210 and the insertion portion of the second member 230 to strongly bond the first member 210 and the second member 230. For example, the adhesive 220 may be an inorganic filler, but is not limited thereto.

The height of the protrusion 216 in the longitudinal direction may be shorter than the height in the longitudinal direction of the insertion portion 232. When the first member 210 and the second member 230 are coupled to each other, Gaps may be formed between the insertion portions 232 at regular intervals. The first member 210 and the second member 230 can be strongly bonded to each other by receiving the adhesive agent 220 in the gap.

According to another embodiment, when the first member 210 and the second member 230 are engaged, the excess adhesive 220 not received between the protrusion 216 and the insertion portion 232 does not flow out to the outside And can be accommodated in the concave portion 218 by a capillary phenomenon. Thus, when the electron beam is incident on the conventional anode electrode, the problem caused by the adhesive that has flowed out to the outside can be solved.

3A to 3C, the cover-type anode electrode may be implemented in various forms in which the first member and the cover-shaped second member are combined.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: anode electrode
200: lid type anode electrode
210: first member
220: Adhesive
230: second member

Claims (1)

A first member including a protrusion formed to extend to one side;
A second member formed to surround the protrusion; And
And an adhesive contained between the first member and the second member.

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