IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第50页
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 CONT ACTS (印制接触⽚) 2.7.1.1 Surface Plating – Wire Bond Pads (cont.)…

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

Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
• Smooth edge condition.
• 边缘光滑。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
• Edge condition - smooth, no burrs, no rough edges, no lifted plat-
ing on printed contacts, no separation (delamination) of printed
contacts from the base material, and no loose fibers on the bev-
eled edge. Exposed copper at end of printed contact is expected
and permissible.
• 边缘状况 - 平滑、无毛刺、无粗糙边缘、印制接触片的镀
层不起翘,印制接触片与基材无分离(分层),接触片的倒
角斜边上无松散的纤维。印制接触片末端允许露铜。
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272a
图272b
图272c
2.7 PRINTED CONTACTS(印制接触⽚)
2.7.2 Burrs on Edge-Board Contacts(印制接触⽚ – 边缘⽑刺)
43IPC-A-600H-2010 2010年4月