IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第72页

Soda Strawing: A long tubular-like void along the edges of conductive patterns where the solder mask is not bonded to the base material surface or the edge of the conductor. Tin/lead fusing fluxes, fusing oils, solder fl…

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Tenting refers to a via with a mask material applied bridging over the via wherein no additional materials are in the hole. It may be applied
to one side or both sides of the via structure (see Figure 297a), though single sided tenting is not recommended.
材料上,而孔其它外材料的。可从一面或两面材料(见图297c,但不推荐
掩蔽
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
All holes required to be tented are completely covered with mask.
所有要求掩蔽孔都被完全覆盖。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
All holes required to be tented are covered by mask.
所有要求掩蔽孔都被覆盖。
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。
297b
297c
297a
注:此图仅⽤作说明状况,并不要求做显微剖切评价。
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.7 Tenting (Via Holes)掩蔽(导通孔)
63IPC-A-600H-2010 20104
Soda Strawing: A long tubular-like void along the edges of conductive patterns where the solder mask is not bonded to the base material
surface or the edge of the conductor. Tin/lead fusing fluxes, fusing oils, solder fluxes, cleaning agents or volatile materials may be trapped in
the soda straw void.
吸管状空沿着导电形边缘的一种细长状的空,即与基材表面或边缘粘锡铅热熔助焊剂热熔
助焊剂发物可能会被夹封在这种吸管状空中。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No visible soda straw voids between the solder mask and the
printed board base material surface and the edges of the conduc-
tive patterns.
和印制板基材表面以及导电侧边间均
可见空
Acceptable - Class 3(可接受条件 - 3级)
No evidence of soda strawing.
无吸管隙迹象。
Acceptable - Class 1,2(可接受条件 - 1,2级)
Soda strawing along side conductive pattern edges does not
reduce the conductor spacing below the minimum requirements.
Soda strawing is completely sealed from the external environ-
ment.
沿着导电形侧边缘出现吸管状空,但使间距
小至低于最要求。
吸管状空围环境完全封
298a
298c
298b
298d
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.8 Soda Strawing吸管状空
64 IPC-A-600H-201020104
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。
298e
298f
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.8 Soda Strawing (cont.)吸管状空(续)
65IPC-A-600H-2010 20104