IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第111页

T arget Condition - Class 1,2,3 (⽬标条件 - 1,2,3级) • No lifting of lands. • 无 焊 盘 起 翘 。 Acceptable - Class 1,2,3 (可接受条件 - 1,2,3级) After thermal stress testing or rework simulation: • Lifted lands are allowed. 热 应 力 测试或 模拟 返…

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Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
All holes accurately registered in the center of the lands.
所有的准确地对准的中
Acceptable - Class 3(可接受条件 - 3级)
Annular ring measures 0.025 mm [0.000984 in] or more.
环宽大于或等于0.025mm[0.000984in]
Acceptable - Class 2(可接受条件 - 2级)
90° hole breakout is allowed provided the land/conductor junc-
tion is not reduced below the allowable width reduction in
2.10.1.1 and minimum lateral spacing is maintained.
环未使/接区少至小2.10.1.1允许
值并保向间距,则允许90°
Acceptable - Class 1(可接受条件 - 1级)
Hole breakout is allowed provided the land/conductor junction is
not reduced below the allowable width reduction in 2.10.1.1 and
minimum lateral spacing is maintained.
环未使/接区少至小2.10.1.1允许
值并保小间距
Nonconforming - Class 1,2,3(不符合条件 - 1,2,3级)
Defects either do not meet or exceed above criteria.
缺陷不符合或出上述要求。
331d
331c
331b
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 则)
3.3.1 Annular Ring – Internal Layers (cont.)环宽(续)
102 IPC-A-600H-201020104
Visual observations made on cross-sections only.对显微切片进行目检观察。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No lifting of lands.
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
After thermal stress testing or rework simulation:
Lifted lands are allowed.
测试或模拟
允许焊
332a
332b
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 则)
3.3.2 Lifted Lands – (Cross-Sections)(焊盘起翘(显微切⽚)
103IPC-A-600H-2010 20104
Visual observations made on cross-sections only.对显微切片进行目检观察。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No cracks in foil.
铜箔
Acceptable - Class 2,3(可接受条件 - 2,3级)
No evidence of cracks in foil.
铜箔缝迹象。
Acceptable - Class 1(可接受条件 - 1级)
Allowed on one side of hole only and does not extend through foil
thickness.
仅允许孔的一铜箔没有穿整个铜箔
Nonconforming - Class 1,2,3(不符合条件 - 1,2,3级)
Defects either do not meet or exceed above criteria.
缺陷不符合或出上述要求。
333a
333b
333c
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 则)
3.3.3 Foil Crack (Internal Foil) ‘C’ Crack(铜箔裂 层铜箔)C
104 IPC-A-600H-201020104
Visual observations made on cross-sections only.对显微切片进行目检观察。