IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第94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 316c 3.1 DIELECTRIC MA TERIALS ( 介 质材料) 3.1.6 Smear Removal (cont.) ( 去钻污 (续) ) Visual observations …

Smear removal is defined as the removal of resin debris which results from the formation of the hole wall.
去钻污是指去除孔壁成形过程中产生的树脂残渣。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
• Smear removal has not been etched back greater than 0.025 mm
[0.001 in].
• Random tears or drill gouges producing small areas where the
0.025 mm [0.001 in] depth has been exceeded shall be evaluated
as etchback per 3.1.5.1.
• Smear removal sufficiently meets the acceptability criteria for
plating separation (3.3.14).
• 去钻污产生的凹蚀未超过0.025mm[0.001in]。
• 对于小块区域上随机的撕裂或钻槽已超过0.025mm[0.001in]
的情况,应当按3.1.5.1节作为凹蚀进行评价。
• 去钻污完全符合3.3.14节镀层分离的可接受性准则。
图316a
图316b
3.1 DIELECTRIC MATERIALS(介质材料)
3.1.6 Smear Removal(去钻污)
85IPC-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。
图316c
3.1 DIELECTRIC MATERIALS(介质材料)
3.1.6 Smear Removal (cont.)(去钻污(续))
Visual observations made on cross-sections only.(仅对显微切片进行目检观察。)
86 IPC-A-600H-20102010年4月

Metal planes are used for mechanical reinforcement and/or electromagnetic shielding for printed boards. Many requirements are the same as
for metal-core printed boards.
金属层用作印制板机械增强和(或)电磁屏蔽层,很多要求与金属芯印制板相同。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
• Metal plane setback exceeds the procurement documentation
requirements.
• 金属层的余隙大于采购文件的要求。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
• Metal plane setback is equal to or greater than 0.1 mm [0.0040 in]
(when a value is not specified by the procurement documenta-
tion).
• Metal plane setback does not reduce the conductor spacing to less
than the specified minimum on the procurement documentation.
• 金属层的余隙等于或大于0.1mm[0.004in](当采购文件未给
出规定值时)。
• 金属层的余隙没有使导体间距减少到小于采购文件规定的最
小值。
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317a
图317b
图317c
3.1 DIELECTRIC MATERIALS(介质材料)
3.1.7 Dielectric Material, Clearance, Metal Plane for Supported Holes(⾦属层上⽀撑孔的介质间距)
87IPC-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。)