IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第122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 3310c 3.3 PLA TED-THROUGH HOLES – GENERAL (镀覆孔 – 总 则) 3.3.10 Plating V oids (镀层空洞) (续) ) 114 IPC-A-6…

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Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
Hole is free of voids.
空洞。
Acceptable - Class 2,3(可接受条件 - 2,3级)
No more than one plating void per test coupon or production
printed board, regardless of length or size.
No plating void in excess of 5% of the total printed board thick-
ness.
No plating voids evident at the interface of an internal conductive
layer and plated hole wall.
Plating voids less than or equal to 90° of the circumference.
附连测试板或品印制板上的镀层空洞不1个
论长度或大
镀层空洞不过印制板5%
在内层导电层镀层镀层空洞。
镀层空洞于或等于90°
Acceptable - Class 1(可接受条件 - 1级)
No more than three plating void per test coupon or production
printed board, regardless of length or size.
No plating void in excess of 5% of the total printed board thick-
ness.
No plating voids evident at the interface of an internal conductive
layer and plated hole wall.
Plating voids less than or equal to 90° of the circumference.
附连测试板或品印制板上的镀层空洞不3
论长度或大
镀层空洞未超过印制板5%
在内层导电层镀层镀层空洞。
镀层空洞于或等于90°
3310a
3310b
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 则)
3.3.10 Plating Voids(镀层空洞)
113IPC-A-600H-2010 20104
Visual observations made on cross-sections only.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.
缺陷不符合或出上述要求。
3310c
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 则)
3.3.10 Plating Voids(镀层空洞)(续)
114 IPC-A-600H-201020104
Visual observations made on cross-sections only.对显微切片进行目检观察。
Solder coating thickness, when specified, shall be evaluated prior to thermal stress.
有规定时,应当测试之前做评定。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
Solder coating thickness is uniform and covers etched land edge.
Exposed copper is not evident.
度均匀并覆盖已蚀边缘。没有明显
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
Solder coating thickness is uniform. Vertical (conductor and land)
areas may not be covered. No exposed copper is evident.
度均匀,但面(体及)可以未被
盖。没有明显露铜
Nonconforming - Class 1,2,3(不符合条件 - 1,2,3级)
Defects either do not meet or exceed above criteria.
缺陷不符合或出上述要求。
Note: For solderability requirements, see 5.1.
注: 对于可性要求,见5.1节。
3311a
3311b
3311c
3.3 PLATED-THROUGH HOLES – GENERAL(镀覆孔 则)
3.3.11 Solder Coating Thickness (Only When Specified)(焊料涂覆层度(仅当有
115IPC-A-600H-2010 20104
Visual observations made on cross-sections only.对显微切片进行目检观察。