IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第159页
Silver film can be used for electro-static discharge (ESD) shielding in flexible printed boards. Scratches and voids may occur on the surface of the silver film when the liner material is peeled away. 银 膜 可用作 挠 性印制板的 静 电…

A fold mark is characterized by bending in a sharp angle as shown in Figure 4112a. A bend mark is characterized by a bend whose radius is
an obtuse angle, as shown in Figure 4112b.
折叠痕迹是指如图4112a所示的以锐角角度弯曲造成的痕迹。弯曲痕迹是如图4112b所示的弯曲半径为钝角造成的痕迹。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
• Free of voids, scratches or foreign material.
• 无空洞、划痕或外来夹杂物。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
• The fold mark meets the requirements of 4.1.1 for coverlay cov-
erage.
• No fold marks along the conductor pattern.
• No cracks or opening of the conductor pattern.
• Bending marks.
• 折叠痕迹满足4.1.1节覆盖层的覆盖要求。
• 沿着导体图形没有折叠痕迹。
• 导体图形没有裂缝或开口。
• 可有弯曲痕迹。
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4112a
图4112b
4.1 FLEXIBLE AND RIGID-FLEX PRINTED BOARDS(挠性及刚挠性印制板)
4.1.12 Fold/Bend Marks(折叠/弯曲痕迹)
150 IPC-A-600H-20102010年4月

Silver film can be used for electro-static discharge (ESD) shielding in flexible printed boards. Scratches and voids may occur on the surface
of the silver film when the liner material is peeled away.
银膜可用作挠性印制板的静电释放(ESD)屏蔽层。当覆盖膜材料被剥离时银膜表面可能会产生划痕和空洞。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
• Free of voids, scratches or foreign material.
• 无空洞、划痕或外来夹杂物。
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
• Voids, scratches or foreign material do not exceed 5 locations per
side.
• Voids, scratches or foreign material do not expose metal under-
neath the silver film (exposed coverlay underneath is acceptable).
• Voids are less than 3.0 x 3.0 mm [0.118 x 0.118 in] in size.
• The width of scratches does not exceed 1.5 mm [0.060 in], and
their length does not exceed 50% of the length of the flexible
printed board.
• Touch up by black oil pen (see Figure 4113c).
• 每面的空洞、划痕或外来夹杂物不超过5处。
• 空洞、划痕或外来夹杂物未暴露银膜下的金属(暴露覆盖层
可接受)。
• 空洞尺寸小于3.0x3.0mm[0.118x0.118in]。
• 划痕宽度未超过1.5mm[0.060in],且长度未超过挠性印制板
长度的50%。
• 用黑色油性笔进行修补(见图4113c)。
图4113a
图4113b
4.1 FLEXIBLE AND RIGID-FLEX PRINTED BOARDS(挠性及刚挠性印制板)
4.1.13 Silver Film Integrity(银膜完整性)
151IPC-A-600H-2010 2010年4月

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4113c
4.1 FLEXIBLE AND RIGID-FLEX PRINTED BOARDS(挠性及刚挠性印制板)
4.1.13 Silver Film Integrity (cont.)(银膜完整性(续))
152 IPC-A-600H-20102010年4月