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 可同意的 ——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.
部件放松能够移动。
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 可同意的——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.
IPC-A-610国际标准中英文对照
