IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第79页

Acceptable - Class 2 （可接受条件 - 2级） • 90° breakout or less (see item A in Figure 2103d). • If breakout occurs at the conductor to land junction area, the land/ conductor junction is not reduced by more than 20% of the mini…

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Supported Hole: A hole within a printed board that has its inside surfaces plated or otherwise reinforced.
⽀撑孔：印制板中孔的表面经过电镀或采用其它方法增强的孔。
Target Condition - Class 1,2,3（⽬标条件 - 1,2,3级）
• Holes are centered in the lands.
• 孔位于焊盘中心。
Acceptable - Class 3（可接受条件 - 3级）
• Holes are not centered in the lands, but the annular ring measures
0.050 mm [0.0020 in] or more.
• The minimum external annular ring may have 20% reduction of
the minimum annular at the measurement area due to defects such
as pits, dents, nicks, pinholes, or splay.
• 孔 没有位 于 焊 盘中心，但 环宽大于或等于0.050mm[0.0020
in]。
• 测量区域内的最小环宽由于诸如麻点、凹坑、缺口、针孔或
斜孔等缺陷的存在，可减少最小外层环宽的20%。
图2103a
图2103b
0.050 mm
[0.0020 in]
0.050 mm
[0.0020 in]
0.050 mm
[0.0020 in]
图2103c
0.050 mm
[0.0020 in]
2.10 PATTERN DEFINITION – DIMENSIONAL（图形精确度 – 尺⼨要求）
2.10.3 External Annular Ring – Supported Holes（⽀撑孔的外层环宽）
70 IPC-A-600H-20102010年4月
Acceptable - Class 2（可接受条件 - 2级）
• 90° breakout or less (see item A in Figure 2103d).
• If breakout occurs at the conductor to land junction area, the land/
conductor junction is not reduced by more than 20% of the mini-
mum conductor width specified on the engineering drawing or the
production master nominal. The conductor junction should never
be less than 0.050 mm [0.0020 in] or the minimum line width,
whichever is smaller (see item C in Figure 2103d).
• Minimum lateral spacing is maintained.
• 破环小于或等于90°（见图2103d中的A项）。
• 如破环发生在焊盘与导体的连接区，则导体宽度的减少不大
于工程图纸或生产底版中标称的最小导体宽度的20%。导体
连接处绝不应该小于0.050mm[0.0020in]，或不应该小于最小
线宽，取两者中的较小者（见图2103d中的C项）。
• 满足导体之间最小侧向间距要求。
Acceptable - Class 1（可接受条件 - 1级）
• 180° breakout or less (see item B in Figure 2103d).
• If breakout occurs at the conductor to land junction area, the con-
ductor is not reduced by more than 30% of the minimum conduc-
tor width specified on the production master nominal (see item D
in Figure 2103d).
• Form, fit and function are not affected.
• Minimum lateral spacing is maintained.
• 破环小于等于180°（见图2103d中的B项）。
• 如破环发生在焊盘与导体的连接区，导体宽度的减少不大于
生产底版中标称的最小导体宽度的30%。（见图2103d中的D
项）
• 外形、安装和功能未受影响。
• 满足导体之间最小侧向间距要求。
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2103d
A
B
A
B
C
D
2.10 PATTERN DEFINITION – DIMENSIONAL（图形精确度 – 尺⼨要求）
2.10.3 External Annular Ring – Supported Holes (cont.)（⽀撑孔的外层环宽（续））
71IPC-A-600H-2010 2010年4月
Unsupported Hole: A hole within a printed board that does not contain plating or other type of conductive reinforcement.
⾮⽀撑孔：印制板中不包含镀层或其它类型导电增强材料的孔。
Target Condition - Class 1,2,3（⽬标条件 - 1,2,3级）
• Holes are centered in the lands.
• 孔位于焊盘中心。
Acceptable - Class 3（可接受条件 - 3级）
• Annular ring measures 0.15 mm [0.00591 in] or more in any
direction. (See item A in Figure 2104b) The minimum external
annular ring may have a 20% reduction of the minimum annular
ring at the measurement area due to defects such as pits, dents,
nicks, pinholes or splay.
• 任 意方向 的 环宽均不小于0.15mm[0.00591in]（见图2104b
中的A项）。测量区域内的最小外层环宽，由于诸如麻点、
凹坑、缺口、针孔或斜孔等缺陷的存在，可以再减少20%。
Acceptable - Class 2（可接受条件 - 2级）
• 90° breakout is allowed. (See item B in Figure 2104b.)
• If breakout occurs at the conductor to land junction area, the con-
ductor is not reduced by more than 20% of the minimum conduc-
tor width specified on the engineering drawing or the production
master nominal.
• 90°破环是允许的（见图2104b中的B项）。
• 如破环发生在焊盘与导体的连接区，导体宽度的减少不大于
工程图纸或生产底版标称最小导体宽度的20%。
Acceptable - Class 1（可接受条件 - 1级）
• 90° breakout is allowed. (See item C in Figure 2104b.)
• If breakout occurs at the conductor to land junction area, the con-
ductor is not reduced by more than 30% of the minimum conduc-
tor width specified on the production master nominal.
• 90°破环是允许的（见图2104b中的C项）。
• 如破环发生在焊盘与导体的连接区，导体宽度的减少不大于
工程图纸或生产底版标称最小导体宽度的30%。
Nonconforming - Class 1,2,3（不符合条件 - 1,2,3级）
• Defects either do not meet or exceed above criteria.
不符合条件 - 1,2,3级
• 缺陷不符合或超出上述要求。
图2104a
图2104b
A
B
C
图2104c
2.10 PATTERN DEFINITION – DIMENSIONAL（图形精确度 – 尺⼨要求）
2.10.4 External Annular Ring – Unsupported Holes（⾮⽀撑孔的外层环宽）
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