weeks sem users meeting
DESCRIPTION
Weeks SEM Users Meeting. October 22, 2010. Topics. Introductions Operation BSE detector broken/replaced New sample height procedure Filaments and heating issues Undersaturate filament, but Use bias >0 to tweak tip for nice filament image Use lower current for better images (up to point) - PowerPoint PPT PresentationTRANSCRIPT
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Weeks SEM Users MeetingOctober 22, 2010
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TopicsIntroductionsOperationBSE detector broken/replacedNew sample height procedureFilaments and heating issuesUndersaturate filament, butUse bias >0 to tweak tip for nice filament imageUse lower current for better images (up to point) But then for BSE, use higher Gain Setting (4 vs 3)Tip: Measurement toolCaution: Reversed mouse modeInnovation award: beer cap sample holderSEM Research User Report: NorikoQuestions for Hitachi Engineer Don GramerSuggestions for future meetings
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New Sample Height Procedure
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Filament Lifetime 2006-2010
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5/1/2007 235 hrsNormal: long life and then someone overheated and it failed explainable
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Not Normal Behavior!8/28/2010 40.1 hrs!
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06/07/2010 42 hrsWire is ~100 micron diameter before useGetting weird thinning at tip. And very weird thinning on legs!
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Use low filamentTweak gun biasUse not too high, not too low probe current (30? 40?)Now can use vy short stage WDFor low current, bump up BSE Gain to 4
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Measurement Tool
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But how to (1) remove measurement & (2) turn off green box??
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Recently some users found that the Mouse mode movement tool took them the opposite direction.Should move the left point to the rightbut it went the opposite way.
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Please Do NOT play with this.NO
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If Mouse Mode NOT set for stage, set it HERE
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Use only vacuum-appropriate sticky substrates to hold material while the epoxy is settinguse only correct epoxyNo problem with the specimen holders..but.
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SEM Research User Report