[分享]网板开口法,仅供大家参考 [复制链接]

常有朋友在问一个新网板要如何开,我提供一点经验供大家参考
元件类型    引脚间距    焊盘宽度    焊盘长度    开口宽度    开口长度    模板厚度
PLCC    1.27mm    0.65mm    2.00mm    0.60mm    1.95mm    0.15-0.25mm
QFP    0.635mm    0.35mm    1.50mm    0.32mm    1.45mm    0.15-0.18mm
QFP    0.50mm    0.254mm    1.25mm    0.22mm    1.20mm    0.12-0.15mm
QFP    0.40mm    0.25mm    1.25mm    0.20mm    1.20mm    0.10-0.12mm
QFP    0.30mm    0.20mm    1.00mm    0.15mm    0.95mm    0.07-0.12mm
402        0.50mm    0.65mm    0.45mm    0.60mm    0.12-0.15mm
201        0.25mm    0.40mm    0.23mm    0.35mm    0.07-0.12mm
BGA    1.27mm    Ø0.80mm        Ø0.75mm        0.15-0.20mm
µBGA    1.00mm    Ø0.38mm        Ø0.35mm        0.10-0.12mm
µBGA    0.50mm    Ø0.30mm        Ø0.28mm        0.07-0.12mm
Flip chip    0.25mm    0.12mm    0.12mm    0.12mm    0.12mm    0.08-0.10mm
Flip chip    0.20mm    0.10mm    0.10mm    0.10mm    0.10mm    0.05-0.10mm
Flip chip    0.15mm    0.08mm    0.08mm    0.08mm    0.08mm    0.03-0.08mm

這是你的經驗么?
拿0.5mm QFN來說寬度0.22是不是太小,個人認為0.23~0.25比較合適
0.4mm的是不是又太大....