热风焊盘制作参考
Flash Name: TRaXbXc-d
a. Inner Diameter: Drill Size + 16MIL
b. Outer Diameter: Drill Size + 30MIL
c. Wed Open: 12 (当DRILL_SIZE = 10MIL以下)
15 (当DRILL_SIZE = 11~40MIL)
20 (当DRILL_SIZE = 41~70MIL)
30 (当DRILL_SIZE = 71~170 MIL)
40 (当DRILL_SIZE = 171 MIL以上)
也有这种说法:至于flash的开口宽度,则要根据圆周率计算一下,保证连接处的宽度不小于10mil。公式为:
DRILL SIZE × Sin30°﹙正弦函数30度﹚批注[B.K.1]:那不就是1/2?有待商榷
d.Angle:45
以上是网上所看到高手们的作法,以下是个人做法:
热风焊盘的内径(ID) = 钻孔直径+20MIL
热风焊盘的外径(OD) = Anti-pad的直径,Anti-pad通常比焊盘直径大20MIL.
开口宽度 = (OD-ID)/2+10MIL, 保留整数
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Anti Pad直径=Regular Pad直径+10mil
SOLDERMASK = Regular_Pad + 6MIL(0.15mm)
PASTEMASK = Regular Pad (可以不要)
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