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1、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4-641. Heat sink散热片Acceptable-Class 1,2,3可接受的 等级1,2,3 Component not flus
2、h. 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 mo
3、ved.部件松弛可以移动。Figure图4-661. 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1，2，3Components 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 (le
4、ft-to-rightor 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1，2，3Polarized and multilead components are orientedcorrectly.有极性和多引脚的组件应按正确方向安装。When hand formed and hand-inserted, polarizationsymbols are discernible.当手工成型及手插件时，极性符号可以辨识。All components are as sp
5、ecified 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
6、，2，3Component 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 1，2，3Nonpo
7、larized 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 1，2，3Polarized part is mounted with a long ground lead.极性组件安装时有长的接地引脚Polarized marking hidden.极性标识被隐藏起来Nonpolarized component markings read from b
8、ottom to top.无极性组件标识可以从底至上辨识。Figure图 5-5Defect-Class 1,2,3缺点等级 1，2，3Polarized component is mounted backwards.极性组件安装反向。Figure图 5-65.2 Mounting 安装5.2.1 Mounting-Horizontal-Axial Leaded-Supported Holes安装水平轴向引脚有支撑孔Target-Class 1,2,3目标等级1，2，3The entire body length of the component is incontact with the b
9、oard surface.整个组件本体长度与线路板表面完全接触Components required to be mounted off the board are ,at least 1.5mm0.059 infrom the board surface; e.g., high heat dissipating.需要离开线路板表面安装的组件至少要离开线路板Figure图 5-7 平面1.5mm（0.059 in），如高散热器件. Figure图 5-85.2.1 Mounting-Horizontal-Axial Leaded-Supported Holes(cont.)安装水平轴对称引脚有
10、支撑孔Acceptable-Class 1,2可接受的等级1，2，3The maximum space between the component and theboard surface does not violate the requirements for lead protrusion(see 5.2.7)or component height(H). Figure图 5-9 (H) is a user-determined dimension.)组件与线路板平面之间的最大间距不应违反引脚突出（见5.2.7）或组件高度（H）的要求。 （高度（H）是由使用者决定的尺寸）Process
11、Indicator-Class 3程序指示等级3The farthest distance between the component body and the board(D) is larger than 0.7mm0.028 in. 组件本体与线路板之间的最大的距离（D）超过0.7mm（0.028 in）。Defect-Class 1,2,3缺点等级1，2，3Components required to be mounted above the board surface are less than 1.5mm0.059 in 要求离开线路板表面安装的组件与线路板的距离小于1.5mm（0
12、.059 in）.5.2.2 Mounting-Horizontal-Axial Leaded-Unsupported Holes安装水平轴向引脚无支撑的孔Target-Class 1,2,3目标等级1.2.3The entire body length of the component is in contact with the board surface.整个组件本体长度与线路板表面完全接触.Components required to be mounted off the board areat minimum 1.5mm0.059 in from the boardFigure图 5
13、-10 surface ;e.g. ,high heat dissipating.1.No Plating in barrel 需要离开线路板表面安装的组件至少要离开线路板平孔壁上没有电镀 面1.5mm（0.059 in），如高散热器件. Components required to be mounted off the board are provided with lead forms at the board surface or other mechanical support to prevent lifting of solder land.需要离开线路板安装的组件在线路板表面利用引脚形状或其它机械支撑来防止焊盘的翘起。 Figure图 5-11 Figure图 5-121. Lead forms 引脚形状Defect-Class 1,2,3缺点等级1，2，3Components required to be mounted off the board are not provided with lead forms at the board surface or other m
