IPC-A-610国际标准中英文对照
4.6.2 Heat sink-Contact 散热片――接触片 arget-Class 1,2,3 目标——等级 1,2,3
· Component and heatsink are in full contact with the mounting surface. 组件和散热片与安装表面完全接触
· Hardware meets specified
attachment requirements. 部件满足规定的接触要求。
Figure图4-64 1. Heat sink 散热片
Acceptable-Class 1,2,3 可接受的 ——等级 1,2,3 · Component not flush. 组件不平齐
· Minimum 75% contact with mounting surface.
至少有75%与安装表面接触 · Hardware meets mounting torque requirements if specified.
如果有规定，部件满足安装的转距要求
Figure图4-65
1. Gap 2. Heat sink 间隙 散热片
Defect-Class 1,2,3 缺点——等级 1,2,3
· Component is not in contact with mounting surface. 组件没有接触到安装表面 · Hardware is loose and can be moved.
部件松弛可以移动。
Figure图4-66
1. Heat sink 2. Gap 散热片 间隙
5.1 Orientation 方向
5.1.1 Orientation-Horizontal 方向——水平
Target-Class 1,2,3 目标——等级 1，2，3 ?Components are centered between their lands. 组件位于焊盘中央 ?Component markings are discernible. 组件标识清晰可见
?Nonpolarized components are
oriented so that
markings all read the same way (left-to-right
or top-to-bottom).
Figure图5-1 无极性组件的方向应使其标识
都能按同样方式进行辨识
（从左到右或从上到下）
Acceptable-Class 1,2,3 可接受的——等级 1，2，3 ?Polarized and multilead components are oriented correctly.
有极性和多引脚的组件应按正确方向安装。
?When hand formed and hand-inserted, polarization
symbols are discernible.
当手工成型及手插件时，极性符号可以辨识。
?All components are as specified and terminate to Figure图 5-2 correct lands.
所有组件都符合规定并连接到
正确的焊盘上。
?Nonpolarized components do not need to be oriented so that markings all read the same way(left-to right or top to-bottom).
无极性的组件不需要按同样的方向，只要标识可按相同方向辨识即可（从左到右或从上到下）.
5.1.1 Orientation-Horizontal(cont.) 方向——水平（续）
Defect-Class 1,2,3 缺点——等级1，2，3
?Component is not as specified (Wrong part).
组件不符合规定（组件错误） ?Component not mounted in correct holes.
组件没有安装在正确的孔中。 ?Polarized component mounted
backwards.
有极性组件安装方向相反。
?Multileaded component not oriented correctly.
Figure图 5-3 多引脚组件的安装方向不正确。
5.1.2 Orientation-Vertical 方向——垂直
Target-Class 1,2,3 目标——等级 1，2，3 ?Nonpolarized component markings read from the top down.
无极性组件的标识可以从上至下辨识
?Polarized markings are located on top.
极性标识位于顶部.
Figure图 5-4
Acceptable-Class 1,2,3 可接受的——等级 1，2，3
IPC-A-610国际标准中英文对照(doc17)
