行业分类
smt焊接允收标准4
日期:2009-12-10 10:20  点击:512

理想状况Target Condition
1.各接_都能座落在焊|的中央,未l生偏滑。
1.All the leads footprint is centered on the lands
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允收状况4  Accept Condition
1.各接_已l生偏滑,所偏出焊|以外的接_,尚未超^接_本身度的1/2W。(XQ1/2W )
2.偏移接_之c焊|外之垂直距xR5mil
(0.13mm)以上。(SR5mil)
The lead had shifted off the land
1.The length of lead shifted off the land (X) shall less 1/2 width of lead (W)
2.The clearance distance between shifted lead and land edge shall over 5 mil
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拒收状况4 Reject Condition
1.各接_已l生偏滑,所偏出焊|以外的接_,已超^接_本身度的1/2W(MI)。(X>1/2W )
2.偏移接_之c焊|外之垂直距x<5mil(0.13mm)以下(MI)。(S<5mil)
3.Whichever is rejected .

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