IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第67页

T arget Condition - Class 1,2,3 (⽬标条件 - 1,2,3级) • No evidence of blisters, bubbles or delamination between the sol- der mask and the printed board base material and conductive pat- terns. • 阻 焊 膜 和印制板基 材 及 导电 图 形 之 间 无 起…

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Solder Dam: A portion of the solder mask pattern, used in conjunction with BGA or Fine Pitch BGA mounting, that provides a segment
of solder mask material to separate the mounting portion of the pattern and the interconnection via in order to avoid solder being skived from
the attachment joint into the via.
阻焊坝:的一部分,用于BGABGA装连接,以一段阻材料将图部分与互连导,以
料从接处落入内。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
The solder mask is centered around the copper land and escape
via with clearance. Mask only covers the conductor between cop-
per land and escape via.
铜焊为中,并
覆盖铜焊孔间体。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
If solder mask dam is specified (to prevent bridging of solder to
the via), it remains in place with the copper covered.
规定有(为防止料与
在规定且铜被覆盖。
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。
2933a
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.3.3 Ball Grid Array (Solder Dam)(球栅列阵(阻焊坝)
58 IPC-A-600H-201020104
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No evidence of blisters, bubbles or delamination between the sol-
der mask and the printed board base material and conductive pat-
terns.
和印制板基导电起泡、泡或分
象。
Acceptable - Class 2,3(可接受条件 - 2,3级)
Two per side not exceeding 0.25 mm [0.00984 in] in the greatest
dimension.
Reduction of electrical spacing does not exceed 25%, or the mini-
mum spacing.
印制板每面可有两瑕疵,每瑕疵的最大尺寸0.25
mm[0.009841in]
电气间距量不间距25%,或电气间距
于最小间距
Acceptable - Class 1(可接受条件 - 1级)
Blisters, bubbles or delamination do not bridge between conduc-
tors.
起泡、泡或分没有使
294a
294b
294c
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.4 Blisters/Delamination(起泡/分层)
59IPC-A-600H-2010 20104
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。
294d
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.4 Blisters/Delamination (cont.)(起泡/分层(续)
60 IPC-A-600H-201020104