JPH0173928U - - Google Patents

Info

Publication number
JPH0173928U
JPH0173928U JP1987167930U JP16793087U JPH0173928U JP H0173928 U JPH0173928 U JP H0173928U JP 1987167930 U JP1987167930 U JP 1987167930U JP 16793087 U JP16793087 U JP 16793087U JP H0173928 U JPH0173928 U JP H0173928U
Authority
JP
Japan
Prior art keywords
plasma emission
decrease
emission intensity
end point
etching end
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
JP1987167930U
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 JP1987167930U priority Critical patent/JPH0173928U/ja
Publication of JPH0173928U publication Critical patent/JPH0173928U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drying Of Semiconductors (AREA)

Description

【図面の簡単な説明】
第1図は、本考案の一実施例のエツチング終点
判定装置のブロツク図、第2図は、第1図の装置
での信号波形の模式図、第3図は、本考案の他の
実施例のエツチング終点判定装置のブロツク図で
ある。 1…フオトマル、2…オフセツト回路、3…前
段アンプ、4…比較回路、5…ゲイン回路、6…
終点判定回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. プラズマ発光強度の変化を観測してエツチング
    終点を判定する装置において、採光窓のプラズマ
    発光透過率の低下による前記プラズマ発光強度の
    低下分を補正する手段を具備したことを特徴とす
    るエツチング終点判定装置。
JP1987167930U 1987-11-04 1987-11-04 Pending JPH0173928U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987167930U JPH0173928U (ja) 1987-11-04 1987-11-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987167930U JPH0173928U (ja) 1987-11-04 1987-11-04

Publications (1)

Publication Number Publication Date
JPH0173928U true JPH0173928U (ja) 1989-05-18

Family

ID=31456664

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987167930U Pending JPH0173928U (ja) 1987-11-04 1987-11-04

Country Status (1)

Country Link
JP (1) JPH0173928U (ja)

Similar Documents

Publication Publication Date Title
JPH0173928U (ja)
JPS63168708U (ja)
JPS63171022U (ja)
JPS6289831U (ja)
JPS6318835U (ja)
JPH032244U (ja)
JPH0354912U (ja)
JPH01115378U (ja)
JPS61162125U (ja)
JPH01113411U (ja)
JPS6244565U (ja)
JPS645159U (ja)
JPS61197527U (ja)
JPH0189385U (ja)
JPS63159917U (ja)
JPS62155580U (ja)
JPS63182098U (ja)
JPS63131411U (ja)
JPS62103094U (ja)
JPS6285966U (ja)
JPS61136637U (ja)
JPH029427U (ja)
JPH02101290U (ja)
JPH01100521U (ja)
JPS6330078U (ja)