IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第49页
T arget Condition - Class 1,2,3 (⽬标条件 - 1,2,3级) • Contacts are free of surface nodules, roughness, electrical test witness marks or scratches that exceed 0.8 µm [32 µin] RMS (root-mean-square) in the pristine area in acc…

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271c
2.7 PRINTED CONTACTS(印制接触⽚)
2.7.1 Surface Plating – Plated Contacts (cont.)(表⾯镀层 – 电镀的接触⽚(续))
40 IPC-A-600H-20102010年4月

Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
• Contacts are free of surface nodules, roughness, electrical test
witness marks or scratches that exceed 0.8 µm [32 µin] RMS
(root-mean-square) in the pristine area in accordance with an
applicable test method AABUS. If IPC-TM-650, Method 2.4.15,
is used, it is recommended that the roughness-width cutoff be
adjusted to approximately 80% of the maximum length of the
wire bond pad in order to obtain the RMS value within the pristine
area. For more information on surface roughness, refer to ASME
B46.1.
• The pristine area is defined as an area bounded in the center of the
pad by 80% of the pad width and 80% of the pad length (see Fig-
ure 2711b).
• 依据供需双方协商确定的测试方法测试后,接触片在完好区
域内没有超过0.8µm[32µin]RMS(均方根值)的表面结瘤、
粗糙、电气测试痕 记 或划痕。如使用IPC-TM-650测试方法
2.4.15,为了获得完好区域内的均方根值,建议把粗糙度截
除宽度调节至约为金属线键合盘最大长度的80%。关于表面
粗糙度的更多信息请参考ASME B46.1。
• 完好区域的定义是以引线键合盘中心为基准,引线键合盘长
度的80%和宽度的80%范围内的区域(见图2711b)。
图2711a
图2711b 完好区域
2.7 PRINTED CONTACTS(印制接触⽚)
2.7.1.1 Surface Plating – Wire Bond Pads(表⾯镀层 – ⾦属线键合盘)
41IPC-A-600H-2010 2010年4月

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2711c
图2711d
图2711e
2.7 PRINTED CONTACTS(印制接触⽚)
2.7.1.1 Surface Plating – Wire Bond Pads (cont.)(表⾯镀层 – ⾦属线键合盘(续))
42 IPC-A-600H-20102010年4月