IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第35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 234c 2.3 BASE MA TERIAL SUBSURF ACE (基材表⾯下) 2.3.4 Foreign Inclusions (cont.) (外来夹杂物(续) ) 27 IPC-A-60…

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Foreign Particles: Metallic or nonmetallic, which may be entrapped or embedded in an insulating material.
Foreign material may be detected in raw laminate, B stage, or processed multilayer printed boards. The foreign objects may be conductive or
nonconductive, and both types may be nonconforming depending on size and location.
外来夹杂物:是指绝缘材料内的
来夹杂物可以在基板材料、材料(B、或多层印制板中检测出。外来物可能是可能是非导体,
这两种情况其大及所在部确定是否为不符合条件。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No foreign inclusions.
来夹杂物
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
Translucent particles trapped within the printed board.
Opaque particles trapped within the printed board which do not
reduce the spacing between adjacent conductors to below the
minimum spacing specified in the IPC-6010 series.
Electrical parameters of the printed board are unaffected.
在板内的明微是可接受的。
板内有不明微,但没有使间距小至低于
IPC-6010系列文件规定的最小间距
印制板的电气参数未受影响。
234a
234b
2.3 BASE MATERIAL SUBSURFACE(基材表⾯下)
2.3.4 Foreign Inclusions(外来夹杂物)
26 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。
234c
2.3 BASE MATERIAL SUBSURFACE(基材表⾯下)
2.3.4 Foreign Inclusions (cont.)(外来夹杂物(续)
27IPC-A-600H-2010 20104
Nonwetting: The inability of molten solder to form a metallic bond with the basis metal.
不润湿:料不能与基材属键合。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No nonwetting.
湿
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
Complete wetting on all conductive surfaces where solder is not
excluded by mask or other plating finish. Vertical sides (conduc-
tor and land) areas may not be covered.
未被或其他镀层覆盖的所有导电表面被焊
湿面(体和)区域可以不覆盖。
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。
241b
241c
241a
注:此图仅⽤作说明状况,并不要求做显微剖切评价。
不润湿
焊料
金属基材
基材
2.4 SOLDER COATINGS AND FUSED TIN LEAD(焊料涂覆层和热熔锡铅层)
2.4.1 Nonwetting(不润湿)
28 IPC-A-600H-201020104