IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第15页
T arget Condition - Class 1,2,3 （⽬标条件 - 1,2,3级） • Edge conditions - smooth, no burrs. • 边缘 条件 - 光 滑 ， 无 毛刺 。 Acceptable - Class 1,2,3 （可接受条件 - 1,2,3级） • Edge conditions - rough but not frayed. • Edge conditions - loose b…
This section addresses those characteristics which are observable from the surface. This includes those characteristics that are external and
internal in the printed board but visible from the surface as follows:
• Surface Imperfections such as burrs, nicks, scratches, gouges, cut fibers, weave exposure and voids.
• Subsurface Imperfections such as foreign inclusions, measling/crazing, delamination, pink ring and laminate voids.
• Imperfections in Conductive Pattern such as loss of adhesion, reduction of conductor width or thickness due to nicks, pinholes, scratches,
surface plating or coating defects.
• Hole Characteristics such as diameter, misregistration, foreign material, plating or coating defects and scratches.
• Marking Anomalies including location, size, readability, and accuracy.
• Solder Mask Surface Coating Imperfections such as misregistration, blisters, bubbles, delamination, adhesion, physical damage and
thickness.
• Dimensional Characteristics including printed board size and thickness, hole size and pattern accuracy, conductor width and spacing, reg-
istration and annular ring.
本章叙述了从表面可观察到的各种特性，包括下列印制电路板的外部特性，以及某些可以从表面观察到的内部特性。
• 表⾯瑕疵：如毛刺、缺口、划痕、凹槽、断裂的纤维、露织物和空洞等。
• 表⾯下瑕疵：如外来夹杂物、白斑/微裂纹、分层、粉红圈及层压板空洞。
• 导电图形瑕疵：如附着力缺失，由于缺口、针孔、划痕、表面镀层或涂覆层缺陷等引起的导体宽度和厚度的减少。
• 孔特性：如孔径、对位不准、外来夹杂物及镀层或涂覆层缺陷或划痕。
• 标记异常：包括位置、大小、可读性及准确度。
• 阻焊膜表⾯涂覆层瑕疵：如对位不准、起泡、气泡、分层、附着力、物理损伤及厚度。
• 尺⼨特性：包括印制板尺寸及厚度、孔径及图形精度、导体宽度及间距、重合度及环宽。
2.1 Printed Board Edges（印制板边缘）
Imperfections such as burrs, nicks or haloing along the edge of the printed board are acceptable provided they do not exceed the limits below.
沿着印制板边缘的诸如毛刺、缺口或晕圈等瑕疵，只要它们不超过下列要求，均是可接受的。
2.1.1 Burrs（⽑刺）
Burrs are characterized by small lumps or masses with an irregular shape, convex to a surface, and are a result of a machine process, such as
drilling or gouging.
毛刺的定义为从表面伸出的不规则小块状或团状凸出物，它是机械加工的结果，如钻孔或铣切工艺。
2 EXTERNALLY OBSERVABLE CHARACTERISTICS（外部可观察特性）
Introduction（引⾔）
6 IPC-A-600H-20102010年4月
Target Condition - Class 1,2,3（⽬标条件 - 1,2,3级）
• Edge conditions - smooth, no burrs.
• 边缘条件 - 光滑，无毛刺。
Acceptable - Class 1,2,3（可接受条件 - 1,2,3级）
• Edge conditions - rough but not frayed.
• Edge conditions - loose burrs do not affect fit and function.
• 边缘状况 - 粗糙但未磨损。
• 边缘状况 - 有疏松毛刺，但不影响安装和功能。
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2111a
图2111b
图2111c
2.1 BOARD EDGES（板边缘）
2.1.1.1 Nonmetallic Burrs（⾮⾦属⽑刺）
7IPC-A-600H-2010 2010年4月
Target Condition/Acceptable - Class 1,2,3
（⽬标条件/可接受条件 - 1,2,3级）
• Edges shall be clean cut and without metallic burrs.
• 边缘应当切割整齐，无金属毛刺。
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2112a
图2112b
2.1 BOARD EDGES（板边缘）
2.1.1.2 Metallic Burrs（⾦属⽑刺）
8 IPC-A-600H-20102010年4月