IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第85页
Acceptable - Class 2,3 （可接受条件 - 2,3级） • Void/crack less than or equal to 0.08 mm [0.0031 in] and does not violate minimum dielectric spacing. • Laminate anomalies or imperfections, such as voids/cracks or resin recession…
This section covers the acceptability requirements of dielectric materials. Dielectric materials are evaluated after thermal stress. Requirements
for evaluations made in the as received condition should be stated on the procurement documentation.
本节涵盖了介质材料的可接受性要求。在热应力测试后对介质材料进行评定。应该在采购文件中规定接收态下的评定要求。
3.1.1 Laminate Voids/Cracks (Outside Thermal Zone)（层压板空洞/裂缝（受热区外））
Target Condition - Class 1,2,3（⽬标条件 - 1,2,3级）
• Uniform and homogeneous laminate.
• 层压板均匀一致。
图311a
Notes:
1. The thermal zone extends 0.08 mm [0.0031 in] beyond the end of the land,
either internal or external, extending furthest into the laminate area.
2. Laminate anomalies or imperfections that exist entirely in the Zone A area
are not evaluated on specimens which have been exposed to thermal stress
or rework simulation. Boundary line voids/cracks that overlap Zone A and
Zone B as shown in Figure 311e or are entirely in Zone B shall meet the
requirements of 3.1.1.
3. Delamination/Blistering is evaluated in both Zone A and Zone B.
4. Laminate anomalies or imperfections in the non-evaluation areas (at either
end of the microsection specimen) are not evaluated on specimens which
have been exposed to thermal stress or rework simulation.
注：
1. 受热区是指从内层或外层中最靠外的焊盘边缘向层压板延
伸0.08mm[0.0031in]所包含的区域。
2. 经过热应力或模拟返工后，A区内出现的层压板异常或瑕
疵不做评价。如图311e所示，跨连了A区和B区或完全在B
区内的分界线上的空洞/裂缝则应当满足3.1.1节的要求。
3. A区和B区均进行分层/起泡的评定。
4. 经过热应力或模拟返工后，样板上非评价区（显微切片试
样的任一端）出现的层压板异常或瑕疵不做评价。
图311b
3.1 DIELECTRIC MATERIALS（介质材料）
Introduction（引⾔）
76 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。）
Acceptable - Class 2,3（可接受条件 - 2,3级）
• Void/crack less than or equal to 0.08 mm [0.0031 in] and does not
violate minimum dielectric spacing.
• Laminate anomalies or imperfections, such as voids/cracks or
resin recession, in Zone A areas that have been exposed to ther-
mal stress and rework simulation.
• Multiple voids/cracks between two adjacent plated-through holes
in the same plane that do not have combined length which
exceeds these limits.
• 空洞/裂缝小于或等于0.08mm[0.0031in]且不违反最小介质间
距要求。
• 经热应力及模拟返工测试后，允许A区出现诸如空洞/裂缝
或树脂凹缩等层压板异常或瑕疵。
• 当同一层面上相邻的两镀覆孔间出现多个空洞/裂缝时，其
累加长度未超出上述限制。
Acceptable - Class 1（可接受条件 - 1级）
• Void/crack less than or equal to 0.15 mm [0.00591 in] and does
not violate minimum dielectric spacing.
• Laminate anomalies or imperfections, such as voids/cracks or
resin recession, in Zone A areas that have been exposed to ther-
mal stress and rework simulation.
• Multiple voids/cracks between two adjacent plated-through holes
in the same plane that do not have combined length which
exceeds these limits.
• 空洞/裂缝小于或等于0.15mm[0.00591in]且不违反最小介质
间距要求。
• 经热应力及模拟返工测试后，允许A区出现诸如空洞/裂缝
或树脂凹缩等层压板异常或瑕疵。
• 当同一层面上相邻的两个镀覆孔间出现多个空洞裂缝时，其
累加长度未超出上述限制。
图311c
3.1 DIELECTRIC MATERIALS（介质材料）
3.1.1 Laminate Voids/Cracks (Outside Thermal Zone) (cont.)（层压板空洞/裂缝（受热区外）（续））
77IPC-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。）
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。
3.1.2 Registration/Conductor to Holes（导体与孔的重合度）
Registration of conductors is typically determined with respect to PTH lands. Requirements are established through minimum internal annu-
lar ring (see 3.3.1).
导体与孔的重合度通常是相对于镀覆孔焊盘来测定的。其要求是通过最小内层环宽来确定的（见3.3.1节）。
图311d
图311e
3.1 DIELECTRIC MATERIALS（介质材料）
3.1.1 Laminate Voids/Cracks (Outside Thermal Zone) (cont.)（层压板空洞/裂缝（受热区外）（续））
78 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。）