JPS63200442A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS63200442A
JPS63200442A JP3428987A JP3428987A JPS63200442A JP S63200442 A JPS63200442 A JP S63200442A JP 3428987 A JP3428987 A JP 3428987A JP 3428987 A JP3428987 A JP 3428987A JP S63200442 A JPS63200442 A JP S63200442A
Authority
JP
Japan
Prior art keywords
electron beam
electrons
plasma
orifice
electron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3428987A
Other languages
Japanese (ja)
Inventor
Yasuhiro Yamakage
康弘 山蔭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP3428987A priority Critical patent/JPS63200442A/en
Publication of JPS63200442A publication Critical patent/JPS63200442A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make it possible to continuously generate an electron beam as long as source gas is supplied by emitting electrons through gas ionization to take out the emitted electrons through an orifice by means of an electron beam taking-out electrode. CONSTITUTION:Source gas, for instance, argon gas is supplied to a plasma generating chamber 3 through a tube line 6 for holding a pressure in the plasma generating chamber 3 at about 5X10<-2> Pa. A microwave is made incident on this plasma generation chamber 3 through a wave guide 1 for ionizing argon gas. Ar<+> ions, Ar atoms and electrons are contained in a plasma generated in the plasma generating chamber 3 and an electron beam taking-out electrode 5 has positive potential to the plasma generating chamber 3. Electrons in the plasma are taken out by the electron beam taking-out electrode 5 through an orifice 4, as a result, the electron beam is generated. The electron beam can be continuously generated by supplying source gas continuously.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、電子ビーム露光用あるいは電子ビームアニー
ル用等に使用される電子ビーム用電子銃に関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electron beam gun used for electron beam exposure, electron beam annealing, or the like.

〈従来の技術〉 第3図は従来の電子銃の構成を示し、カソード100へ
の通電により発生した電子はビームとなってアノード1
01を通過する。従来では、カソード100としてタン
グステンフィラメントが広く用いられていた。
<Prior Art> FIG. 3 shows the configuration of a conventional electron gun, in which electrons generated by energizing the cathode 100 become a beam and are sent to the anode 1.
Pass through 01. Conventionally, tungsten filaments have been widely used as the cathode 100.

文献:電子顕微鏡土工(1976)29゜〈発明が解決
しようとする問題点〉 従来の電子銃が有する問題点は、カソード自体の短い寿
命である。例えば、タングステンフィラメントでは、数
10時間の使用で切れてしまう。さらに、フィラメント
電流を流す方法を誤ると、直ちに切れて使用不能となっ
てしまう。また、LaB。
Literature: Electron Microscope Earthworks (1976) 29゜〈Problems to be solved by the invention〉 A problem with conventional electron guns is the short lifespan of the cathode itself. For example, a tungsten filament breaks after being used for several tens of hours. Furthermore, if the filament current is applied incorrectly, it will immediately break and become unusable. Also, LaB.

等のカソードにおいては、電子銃室の高真空を必要とし
、さらにこの真空度がカソードの寿命に大きく影響を与
えていた。したがって、装置のコストが高くなるととも
に、運転が容易ではなかった。
These cathodes require a high vacuum in the electron gun chamber, and this degree of vacuum greatly affects the life of the cathode. Therefore, the cost of the device is high and it is not easy to operate.

く問題点を解決するための手段〉 本発明に係る電子銃は、気体電離により電子を放出する
電子放出手段と、この電子放出手段が放出した電子が通
過するオリフィスと、このオリフィスを介して電子ビー
ムを引き出す電子ビーム引き出し電極とを備える。
Means for Solving the Problems> The electron gun according to the present invention includes an electron emitting means for emitting electrons by gas ionization, an orifice through which the electrons emitted by the electron emitting means pass, and an electron emitting means for emitting electrons through the orifice. It is equipped with an electron beam extracting electrode for extracting the beam.

く作用〉 本発明に係る電子銃は、気体電離により電子を放出し、
放出した電子をオリフィスを介して電子ビーム引き出し
電極により引き出し、電子ビームを発生させる。
Function> The electron gun according to the present invention emits electrons by gas ionization,
The emitted electrons are extracted by an electron beam extraction electrode through an orifice to generate an electron beam.

〈実施例〉 第1図は本実施例の電子銃の基本構成を示す。<Example> FIG. 1 shows the basic configuration of the electron gun of this embodiment.

図中、1は導波管、2はコイル、3はプラズマ発生室、
4はオリフィス、5は電子ビーム引き出し電極、6はソ
ースガス供給路、7はバルブである。
In the figure, 1 is a waveguide, 2 is a coil, 3 is a plasma generation chamber,
4 is an orifice, 5 is an electron beam extraction electrode, 6 is a source gas supply path, and 7 is a valve.

4波管1は、マイクロ波をプラズマ発生室3へ導入する
。プラズマ発生室3では、供給されるソースガスがマイ
クロ波の入射により電離する。オリフィス4は、ソース
ガスの電離により発生した電子が通過する。このオリフ
ィス4の直径は、例えば0 、5 mmである。電子ビ
ーム引き出し電極5は、オリフィス4を介して電子ビー
ムを引き出す。
The four-wave tube 1 introduces microwaves into the plasma generation chamber 3. In the plasma generation chamber 3, the supplied source gas is ionized by the incidence of microwaves. Electrons generated by ionization of the source gas pass through the orifice 4 . The diameter of this orifice 4 is, for example, 0.5 mm. The electron beam extraction electrode 5 extracts the electron beam through the orifice 4.

上述のような構成において、プラズマ発生室3に管路6
を経てソースガス、例えばアルゴンガスを供給し、プラ
ズマ発生室3の圧力を5 xxo−”p a程度に保持
する。このプラズマ発生室3に導波管1を通してマイク
ロ波を入射し、アルゴンガスを電離させる。マイクロ波
の周波数は、例えば2.45GH2である。
In the above-described configuration, a pipe line 6 is connected to the plasma generation chamber 3.
A source gas, such as argon gas, is supplied through the plasma generation chamber 3 to maintain the pressure in the plasma generation chamber 3 at approximately 5 xxo-''pa. Microwaves are introduced into the plasma generation chamber 3 through the waveguide 1, and the argon gas is The frequency of the microwave is, for example, 2.45 GH2.

プラズマ発生室3において発生したプラズマ中には、A
 r+イオン、Ar原子、電子等が含まれている。電子
ビーム引き出し電極5は、プラズマ発生室3に対して正
の電位をもつ。したがって、この電子ビーム引き出し電
極5によってプラズマ中の電子が引き出され、この際、
電子はオリフィス4を通して引き出される。この結果、
電子ビームが発生する。ソースガスを連続的に供給する
ことにより、電子ビームを連続して発生させることがで
きる。
In the plasma generated in the plasma generation chamber 3, A
Contains r+ ions, Ar atoms, electrons, etc. The electron beam extraction electrode 5 has a positive potential with respect to the plasma generation chamber 3. Therefore, electrons in the plasma are extracted by the electron beam extraction electrode 5, and at this time,
Electrons are extracted through orifice 4. As a result,
An electron beam is generated. By continuously supplying the source gas, electron beams can be continuously generated.

第2図は本発明の電子銃を使用した電子ビーム装置の構
成を示す。図中、10は電子銃、11は収束レンズ系、
12は偏向系、13は試料台である。電子銃10は、マ
イクロ波導波管1.コイル2、プラズマ発生室3.オリ
フィス4.電子ビーム引き出し電極5から構成され、第
1図に示す電子銃と同様の構成である。電子銃10にて
発生した電子ビームは、収束レンズ系11により集束さ
れ、さらに、偏向系12によって方向が制御されて、試
料台13上の試料(′図示せず)へ入射する。
FIG. 2 shows the configuration of an electron beam device using the electron gun of the present invention. In the figure, 10 is an electron gun, 11 is a convergent lens system,
12 is a deflection system, and 13 is a sample stage. The electron gun 10 includes a microwave waveguide 1. Coil 2, plasma generation chamber 3. Orifice 4. It consists of an electron beam extraction electrode 5, and has the same structure as the electron gun shown in FIG. The electron beam generated by the electron gun 10 is focused by a converging lens system 11, the direction of which is further controlled by a deflection system 12, and is incident on a sample (not shown) on a sample stage 13.

気体電離を生じさせる方法として、RF放電(周波数1
3.56 M Ilz )を用いることもできる。また
、気体電離により電子を放出させるのに、紫外線、X線
(SOR光も含む)を用いることもできる。
RF discharge (frequency 1
3.56 M Ilz ) can also be used. Moreover, ultraviolet rays and X-rays (including SOR light) can also be used to emit electrons by gas ionization.

なお、電子を引き出すかわりに、気体電離で生じたイオ
ンを引き出すようにすると、イオン銃としても利用でき
る。このイオンは、ソースガスの種類を変えると、種々
のイオンが利用できることになる。
Note that if instead of extracting electrons, ions generated by gas ionization are extracted, it can also be used as an ion gun. Various types of ions can be used by changing the type of source gas.

〈発明の効果〉 以上説明したように、本発明においては、気体電離によ
り電子を放出し、放出した電子をオリフィスを介して電
子ビーム引き出し電極にて引き出すことにより電子ビー
ムを発生させるようにしたので、従来におけるカソード
の寿命による使用不能といった事態が生じず、ソースガ
スを供給し続ける限り連続して電子ビームを発生させる
ことができる。また、電子銃部を超高真空(〜10−’
Pa)にする必要がないので、装置のコストが安くまた
運転が容易である。
<Effects of the Invention> As explained above, in the present invention, an electron beam is generated by emitting electrons by gas ionization and extracting the emitted electrons by an electron beam extracting electrode through an orifice. This eliminates the conventional situation where the cathode becomes unusable due to its lifespan, and electron beams can be generated continuously as long as the source gas continues to be supplied. In addition, the electron gun section was placed in an ultra-high vacuum (~10-'
Pa), the cost of the device is low and it is easy to operate.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明実施例の基本構成を示す図、第2図は本
発明を適用した電子ビーム装置の構成を示す図、 第3図は従来例の電子銃の構成を示す図である。 1・・・導波管 2・・・コイル 3・・・プラズマ発生室 4・・・オリフィス 5・・・電子ビーム引き出し電極 6・・・ソースガス供給管路 7・・・バルブ
FIG. 1 is a diagram showing the basic configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of an electron beam device to which the present invention is applied, and FIG. 3 is a diagram showing the configuration of a conventional electron gun. 1... Waveguide 2... Coil 3... Plasma generation chamber 4... Orifice 5... Electron beam extraction electrode 6... Source gas supply conduit 7... Valve

Claims (1)

【特許請求の範囲】[Claims] 気体電離により電子を放出する電子放出手段と、上記電
子放出手段が放出した電子が通過するオリフィスと、こ
のオリフィスを介して電子ビームを引き出す電子ビーム
引き出し電極とを備えたことを特徴とする電子銃。
An electron gun comprising an electron emitting means for emitting electrons by gas ionization, an orifice through which the electrons emitted by the electron emitting means pass, and an electron beam extraction electrode for drawing out an electron beam through the orifice. .
JP3428987A 1987-02-16 1987-02-16 Electron gun Pending JPS63200442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3428987A JPS63200442A (en) 1987-02-16 1987-02-16 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3428987A JPS63200442A (en) 1987-02-16 1987-02-16 Electron gun

Publications (1)

Publication Number Publication Date
JPS63200442A true JPS63200442A (en) 1988-08-18

Family

ID=12409994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3428987A Pending JPS63200442A (en) 1987-02-16 1987-02-16 Electron gun

Country Status (1)

Country Link
JP (1) JPS63200442A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06325896A (en) * 1993-05-11 1994-11-25 Uchu Kagaku Kenkyusho Microwave discharge type plasma contactor
JP2015525428A (en) * 2012-05-09 2015-09-03 ア−カム アーベー Method and apparatus for generating an electron beam

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06325896A (en) * 1993-05-11 1994-11-25 Uchu Kagaku Kenkyusho Microwave discharge type plasma contactor
JP2015525428A (en) * 2012-05-09 2015-09-03 ア−カム アーベー Method and apparatus for generating an electron beam

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