allegro通孔类焊盘的制作方法
Allegro 提供了良好且交互的工作接口和强大完善的功能,和它前端产品Cadence、OrCAD、Capture的结合,为当前高速、高密度、多层的复杂 PCB 设计布线提供了最完美解决方案。下面小编准备了关于allegro通孔类焊盘的制作方法,提供给大家参考!
allegro软件中,制作通孔焊盘的方法步骤:
对pcb设计来说,通孔类的元件,一般都加thermal pad,也就是要添加花孔,怎样来制作花孔,首先要创建一个 flash symbol;
创建flash symbol 的方法步骤如下:
打开pcb editor软件,file---new,选择 flash symbol,打开创建界面,执行菜单 add---flash,打开therm pad sy...对话框,对热风焊盘的内径、外径、开口的尺寸进行设置后,ok,完成flash symbol的创建。
接下来,就利用创建的flash symbol来创建通孔焊盘。
步骤如下:
打开pad designer 对话框;
1.在parameter选项卡下,type下勾选:through;units:选择所用的单位;drill/slot hole下:hole type 选择:circle drill;plating:选择plated;在drill/slot symbol下对钻孔的符号进行设置(这在今后出光绘时,能体现所设置的符号和标号)
2.在layers选项卡下进行的设置如下:
begin layer层设置
regular pad thermal relief anti pad
实际焊盘大小 比实际焊盘大0.2mm 比实际焊盘大0.2mm
default layer层设置(注意:内层设置很重要)
实际焊盘大小 使用创建的flash 焊盘 比实际焊盘大0.2mm
end layer 层的设置同begin layer的各项设置一致。
solder mask top 比实际焊盘大0.2mm
solder mask bottom 比实际焊盘大0.2mm
pastemask top 同实际焊盘一样大
pastemask bottom 同实际焊盘一样大
完成以上设置,即可完成一个完整的通孔类焊盘的制作。
保存即可,供制作封装调用。
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