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…

Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
• All holes accurately registered in the center of the lands.
• 所有的孔准确地对准焊盘的中心。
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.
• 如破环未使焊盘/导体连接区减少至小于2.10.1.1节允许的宽
度减少值并保持最小侧向间距,则允许有90°的破环。
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.
• 如破环未使焊盘/导体连接区减少至小于2.10.1.1节允许的宽
度减少值并保持最小间距。
Nonconforming - Class 1,2,3(不符合条件 - 1,2,3级)
• Defects either do not meet or exceed above criteria.
• 缺陷不符合或超出上述要求。
图331d
图331c
图331b
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 – 总则)
3.3.1 Annular Ring – Internal Layers (cont.)(内层环宽(续))
102 IPC-A-600H-20102010年4月
Visual observations made on cross-sections only.(仅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.
• 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工后:
• 允许焊盘起翘。
图332a
图332b
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 – 总则)
3.3.2 Lifted Lands – (Cross-Sections)(焊盘起翘(显微切⽚))
103IPC-A-600H-2010 2010年4月
Visual observations made on cross-sections only.(仅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.
• 铜箔无裂缝。
Acceptable - Class 2,3(可接受条件 - 2,3级)
• No evidence of cracks in foil.
• 铜箔上无裂缝迹象。
Acceptable - Class 1(可接受条件 - 1级)
• Allowed on one side of hole only and does not extend through foil
thickness.
• 仅允许孔的一侧铜箔有裂缝,且没有穿透整个铜箔厚度。
Nonconforming - Class 1,2,3(不符合条件 - 1,2,3级)
• Defects either do not meet or exceed above criteria.
• 缺陷不符合或超出上述要求。
图333a
图333b
图333c
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 – 总则)
3.3.3 Foil Crack – (Internal Foil) ‘‘C’’ Crack(铜箔裂缝 –(内层铜箔)C型裂缝)
104 IPC-A-600H-20102010年4月
Visual observations made on cross-sections only.(仅对显微切片进行目检观察。)