solder checking standard——焊接检查标准

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1、Soldercheckingstandard焊接检查标准名称:Soldercheckingstandard焊接检查标准文件编号审查核准制定部门适用部门CL:版本:1Purpose/目的(1)Forsolderinstructionstandard/作为焊接作业遵循的标准(2)AccordingascreatingSOP/作为标准操作规程制定依据(3)ForQCchecking/作为QC检查依据2ReferenceDocuments/参考文件IPC-A-610D3Scope/范围ThisdocumentisvalidwithinforPCBASoldering/适用于PCBA焊接检查.4De

2、scription/内容NO序号item/项目Picture/图示(PASS)Picture/图示(NG)1MinimumEndJointWidth最小末端焊点宽度(PASS)(NG)Endjointwidthisequaltoorgreaterthanleadwidth末端焊点宽度等于或大于引脚宽度.Minimumendjointwidthislessthan50%leadwidth(W)最小末端焊点宽度小于引脚宽度的50%20/20Soldercheckingstandard焊接检查标准2MinimumSideJointLength最小侧面焊点长度(PASS)(NG)Evidenceo

3、fwettedfilletalongfulllengthoflead引脚全长焊点润湿Theminimumsidejointlength(D)islessthanthreeleadwidths(W)or(D)islessthan75%(L)最小焊点长度D小于3倍引脚宽度W或75%引脚长度Widthtoheightratiodoesnotexceedtwotoone(2:1)ratio宽度对高度的比例不超过二比一(2:1).Completewettingatlandorendcapmetallization焊盘和元器件可焊端表面完全润湿.Widthtoheightratioexceedstwo

4、toone(2:1)ratio;Incompletewettingatlandorendcapmetallization;Lessthan100%overlapofthecomponetterminationandtheland元件宽度与高度之比大于2:1；元件焊接端与焊盘未完全润湿；元件端头与焊盘重叠小于100%；3Toeoverhangviolates引脚超焊盘(PASS)(NG)Evidenceofwettedfilletalongfulllengthoflead引脚全长焊点正常润湿Toeoverhangviolatesminimumelectricalclearance元件脚趾部违

5、反最小电气间隙（0.13mm)20/20Soldercheckingstandard焊接检查标准4RectangularorsquareEnd长方体元件偏移(片式元件侧面偏移)(PASS)(NG)Nosideoverhang无侧面偏移Sideoverhangisgreaterthan25%componentterminationwidthor25%landwith,whicheverisless.侧面偏移大于元件可焊端宽度的25%或焊盘宽度的25%5MountingUpsideDown翻面(PASS)(NG)Elementofchipcomponentwithexposeddeposite

6、delectricalelementismountedawayfromtheboard.有暴露存积电气材质的片式元件将材质面朝离印制板面贴装.Elementofchipcomponentwithexposeddepositedelectricalelementismoundedtowardboard片式元件的外露电极朝向印刷板面安装20/20Soldercheckingstandard焊接检查标准6EndOverlap空焊(PASS)(NG)Evidenceofoverlapcontactbetweenthecomponentterminationandthelandisrequired元

7、件可焊端与焊盘间的重叠部分清楚可见Insufficientendoverlap末端没有重叠(空焊)7Tombstoning立碑(PASS)(NG)Chipcomponentsflatingonaterminalend片式元件末端平放在焊盘上.Chipcomponentsstandingonaterminalend片式元件末端翘起(立碑).20/20Soldercheckingstandard焊接检查标准8EndJoint