Allegro绘制PCB流程及规范

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Allegro绘制 PCB流程及规范
目录........................................................................................................................3 1绘制 PCB封装.........................................................................................................................6
1.1焊盘制作.........................................................................................................................6
1.1.1普通焊盘制作..........................................................................................................6
1.1.2热风焊盘制作..........................................................................................................9
1.1.3自定义形状焊盘的制作与使用..............................................................................10
1.2封装绘制.......................................................................................................................11
1.2.1获取元件参数........................................................................................................11
1.2.2新建封装文件........................................................................................................11
1.2.3添加库路径............................................................................................................11
1.2.4设置页面参数........................................................................................................12
1.2.5添加引脚................................................................................................................14
1.2.6添加封装外形........................................................................................................14
1.2.7添加元件标示符.....................................................................................................14
1.2.8添加元件安装外形.................................................................................................14
1.3 LP WIZARD生成封装........................................................................................................15
2 PCB预处理............................................................................................................................19
2.1新建工程及画布参数设置.............................................................................................19
2.1.1新建工程................................................................................................................19
2.1.2设置画布参数........................................................................................................20
2.2设置封装库路径............................................................................................................21
2.3绘制板框.......................................................................................................................22
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Allegro绘制 PCB流程及规范
2.4设置元件摆放区和布线区.............................................................................................23
2.4.1设置允许元件摆放区（Package Keepin）.............................................................23
2.4.2设置允许布线区（Route Keepin）.........................................................................25
2.5放置机械固定件............................................................................................................26
2.5.1放置机械安装孔....................................................................................................26
2.6定义盲孔和层叠结构.....................................................................................................27