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lang+AD0-ZH-CN link+AD0-blue vlink+AD0-purple+AD4- +ADw-div class+AD0-Section1+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4-Hi Nancy,+ADw-o:p+AD4APA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4APA-o:p+AD4AJg-nbsp+ADsAPA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4-I think it depends on what kind of boards you are inspecting and what kind of in process control you+IBk-ve use. +ADw-o:p+AD4APA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4-And you can refer to IPC 600 section 1, the last 3 paragraphs in 1.5. But my personal opinion is 3 diopters should be used for final inspection 100+ACU- on class III boards.+ADw-o:p+AD4APA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4APA-o:p+AD4AJg-nbsp+ADsAPA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4-Best wishes,+ADw-o:p+AD4APA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4-Nora+ADw-o:p+AD4APA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0-navy face+AD0-Arial+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:11.0pt+ADs-font-family:Arial+ADs-color:navy'+AD4APA-o:p+AD4AJg-nbsp+ADsAPA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-div+AD4- +ADw-div class+AD0-MsoNormal align+AD0-center style+AD0-'text-align:center'+AD4APA-font size+AD0-3 face+AD1bi09TAD4APA-span lang+AD0-EN-US style+AD0-'font-size:12.0pt+ADs-font-family:+W4tPUw-'+AD4- +ADw-hr size+AD0-2 width+AD0AIg-100+ACUAIg- align+AD0-center tabindex+AD0--1+AD4- +ADw-/span+AD4APA-/font+AD4APA-/div+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-b+AD4APA-font size+AD0-2 face+AD0-Tahoma+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:10.0pt+ADs-font-family:Tahoma+ADs-font-weight:bold'+AD4-From:+ADw-/span+AD4APA-/font+AD4APA-/b+AD4APA-font size+AD0-2 face+AD0-Tahoma+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:10.0pt+ADs-font-family:Tahoma'+AD4- TGAsia +AFs-mailto:TGAsia+AEA-ipc.org+AF0- +ADw-b+AD4APA-span style+AD0-'font-weight:bold'+AD4-On Behalf Of +ADw-/span+AD4APA-/b+AD4-Nancy Deng+ADw-br+AD4- +ADw-b+AD4APA-span style+AD0-'font-weight:bold'+AD4-Sent:+ADw-/span+AD4APA-/b+AD4- Monday, April 27, 2009 1:35 PM+ADw-br+AD4- +ADw-b+AD4APA-span style+AD0-'font-weight:bold'+AD4-To:+ADw-/span+AD4APA-/b+AD4- TGAsia+AEA-IPC.ORG+ADw-br+AD4- +ADw-b+AD4APA-span style+AD0-'font-weight:bold'+AD4-Subject:+ADw-/span+AD4APA-/b+AD4- +AFs-TGAsia+AF0- +ADw-/span+AD4APA-/font+AD4APA-font size+AD0-2 face+AD1bi09TAD4APA-span style+AD0-'font-size:10.0pt+ADs-font-family:+W4tPUw-'+AD5lPlknj4VSqYjFf252hE9/dSiYkXOHADw-/span+AD4APA-/font+AD4APA-font face+AD1bi09TAD4APA-span lang+AD0-EN-US style+AD0-'font-family:+W4tPUw-'+AD4APA-o:p+AD4APA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-/div+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-3 face+AD0-PMingLiU+AD4APA-span lang+AD0-EN-US style+AD0-'font-size:12.0pt'+AD4APA-o:p+AD4AJg-nbsp+ADsAPA-/o:p+AD4APA-/span+AD4APA-/font+AD4APA-/p+AD4- +ADw-div+AD4- +ADw-p class+AD0-MsoNormal+AD4APA-font size+AD0-2 color+AD0AIgAj-1f497d+ACI- 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