IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第64页

Solder Mask-Defined Lands: A portion of the conductive pattern, used to connect electronic component ball terminations, (BGAs, Fine- Pitch BGAs, etc.), where the solder mask encroaches on the edges of the land to restric…

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Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
No solder mask misregistration.
出现
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
Misregistration to copper-defined lands does not expose adjacent,
electrically isolated lands or conductors.
No solder mask encroachment on edge board printed contacts or
test points.
On surface mount lands with a pitch of 1.25 mm [0.04921 in] or
greater, encroachment is on one side of land only and does not
exceed 0.05 mm [0.0020 in].
On surface mount lands with a pitch less than 1.25 mm [0.04921
in], encroachment is on one side of land only and does not exceed
0.025 mm [0.000984 in].
铜箔限定的没有露相电气
体。
没有印制接片或测试
对于节大于或等于1.25mm[0.04921in]的表面装焊
的一0.05mm[0.0020in]
对于节距小1.25mm[0.04921in]的表面装焊
的一0.025mm[0.000984in]
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。
293a
293b
293c
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.3 Registration to Other Conductive Patterns(与其它导电图形的重合度)
55IPC-A-600H-2010 20104
Solder Mask-Defined Lands: A portion of the conductive pattern, used to connect electronic component ball terminations, (BGAs, Fine-
Pitch BGAs, etc.), where the solder mask encroaches on the edges of the land to restrict the ball attachment within the solder mask profile.
阻焊膜限定的焊盘:导电的一部分,用来连电子件的形端BGABGA等)边缘
制在的范内。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
The solder mask overlap is centered around the lands.
重叠区以为中在其
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
Misregistration creates breakout of the solder mask on the land of
not more than 90°.
使上的出区域不90°
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。
2931a
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.3.1 Ball Grid Array (Solder Mask-Defined Lands)(球栅列阵(阻焊膜限定的焊盘)
56 IPC-A-600H-201020104
Copper-Defined Lands: A portion of the conductive pattern usually, but not exclusively, used for the connection and/or attachment of
components where the land metal is involved in the attachment process, and if solder mask is applied to the product a clearance is provided
for the land area.
铜箔限定的焊盘:通常(但并一定)为导电的一部分,在接过程中,来连接和/或件,如产品
,则围留
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
The solder mask is centered around the copper land with clear-
ance.
铜焊为中
Acceptable - Class 1,2,3(可接受条件 - 1,2,3级)
Solder mask does not encroach on the land, except at the conduc-
tor attachment.
除了接处外,上。
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。
2932a
2932b
2.9 SOLDER MASK(阻焊膜(阻焊剂)
2.9.3.2 Ball Grid Array (Copper-Defined Lands)(球栅列阵(铜箔限定的焊盘)
57IPC-A-600H-2010 20104