目 录
前 言..............................................................................................................................................5
1 目 的 ............................................................................................................................................................6
2 适用范围 ......................................................................................................................................................6
3 引用/参考标准或资料 .................................................................................................................................6
4 名词解释 ......................................................................................................................................................6
5 标准简介 ......................................................................................................................................................7
6 标准内容 ......................................................................................................................................................7
6.1 基板规格 ...........................................................................................................................................7
6.2 层间结构设计 ...................................................................................................................................7
6.2.1 层间结构 ................................................................................................................................7
6.2.2 半固化片规格 ........................................................................................................................8
6.2.3 板厚 ........................................................................................................................................8
6.2.4 板厚公差 ................................................................................................................................8
6.3 外形设计 ...........................................................................................................................................8
6.3.1 一般规那么 ............................................................................................................................8
6.3.2 外形尺寸 ................................................................................................................................9
6.3.3 外形加工 ................................................................................................................................9
6.3.4 翘曲度 ..................................................................................................................................11
6.4 孔和焊盘设计 .................................................................................................................................11
6.4.1 根本要求 ..............................................................................................................................11
6.4.1.1 孔壁铜厚 .......................................................................................................................11
6.4.1.2 非金属化孔 ...................................................................................................................11
6.4.1.3 金属化孔 .......................................................................................................................11
6.4.2 元件孔和元件焊盘 ..............................................................................................................12
6.4.3 导通孔 ..................................................................................................................................12
6.4.4 金属化边 ..............................................................................................................................12
6.4.5 槽的设计 ..............................................................................................................................12
6.4.6 标准安装孔 ..........................................................................................................................13
6.4.7 腰形长孔 ..............................................................................................................................13
6.5 器件工艺 .........................................................................................................................................13
6.6 布局设计 .........................................................................................................................................14
6.6.1 原点、板框及禁布区设置 ..................................................................................................14
6.6.2 布局根本原那么 ..................................................................................................................14
6.6.3 装联工艺选择 ......................................................................................................................14
6.6.4 热设计要求 ..........................................................................................................................15
6.6.5 器件布局要求 ......................................................................................................................15
6.6.6 自动插件 ..............................................................................................................................16
6.6.7 波峰焊工艺 ..........................................................................................................................16
6.6.8 回流焊工艺 ..........................................................................................................................19
6.6.8.1 基准点 ...........................................................................................................................19
6.6.8.2 回流焊器件布局 ...........................................................................................................20
6.6.8.3 通孔回流焊 ...................................................................................................................21
6.7 布线设计 .........................................................................................................................................21
6.7.1 布线根本原那么 ..................................................................................................................21
6.7.2 电流密度设定 ......................................................................................................................22
6.7.2.1 铜箔电流密度设定指导 ...............................................................................................22
6.7.2.2 过孔电流密度设定指导 ...............................................................................................22
6.7.3 线宽间距 ..............................................................................................................................22
6.7.4 热焊盘设计 ..........................................................................................................................24
