JPH02146751U - - Google Patents

Info

Publication number
JPH02146751U
JPH02146751U JP5582589U JP5582589U JPH02146751U JP H02146751 U JPH02146751 U JP H02146751U JP 5582589 U JP5582589 U JP 5582589U JP 5582589 U JP5582589 U JP 5582589U JP H02146751 U JPH02146751 U JP H02146751U
Authority
JP
Japan
Prior art keywords
power supply
electron gun
emission
field emission
emission current
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
JP5582589U
Other languages
English (en)
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 filed Critical
Priority to JP5582589U priority Critical patent/JPH02146751U/ja
Publication of JPH02146751U publication Critical patent/JPH02146751U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Electron Sources, Ion Sources (AREA)

Description

【図面の簡単な説明】
第1図は本案の一実施例のブロツク図、第2図
はエミシヨン電流のエミシヨン電流と時間関係を
示す図である。 1……陰極、2……第一陽極、3……第二陽極
、4……電圧電源、5……加速電圧電源、6……
比較回路、7……電子銃焼き出し電源、8……ヒ
ータ、9……陰極加熱電源。

Claims (1)

    【実用新案登録請求の範囲】
  1. エミシヨン電源引き出し電極を有する電界放射
    形電子銃、電子銃を制御するための加速電圧電源
    、エミシヨン電流引き出し電源を有する装置にお
    いて、陰極より放射されるエミシヨン電流の初期
    減少領域における立ち下がり時間の割合により、
    電子銃の焼き出し時間を設定することを特徴とす
    る電界放射形走査電子顕微鏡。
JP5582589U 1989-05-17 1989-05-17 Pending JPH02146751U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5582589U JPH02146751U (ja) 1989-05-17 1989-05-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5582589U JPH02146751U (ja) 1989-05-17 1989-05-17

Publications (1)

Publication Number Publication Date
JPH02146751U true JPH02146751U (ja) 1990-12-13

Family

ID=31579120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5582589U Pending JPH02146751U (ja) 1989-05-17 1989-05-17

Country Status (1)

Country Link
JP (1) JPH02146751U (ja)

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