一般印焊膏开口设计（见下表）：常用chip件的外形尺寸图
|
元件类型 |
PITCH (间距) |
焊盘宽度 |
焊盘长度 |
开口宽度 |
开口长度 |
模板厚度 |
宽厚比 |
面积比 |
|
PLCC |
1.27mm (50mil) |
0.65mm (25.6mil) |
2.00mm (78.7mil) |
0.6mm (23.6mil) |
1.95mm (76.8mil) |
0.15-0.25mm (2.91-9.84mil) |
2.3-0.8 |
0.88-1.48 |
|
QFP |
0.635mm (25mil) |
0.35mm (13.8mil) |
1.50mm (59.1mil) |
0.3mm (11.8mil) |
1.45mm (57.1mil) |
0.15-0.18mm (5.91-7.5mil) |
1.7-2.0 |
0.71-0.83 |
|
QFP |
0.5mm (20mil) |
2.54-0.33mm (10-13mil) |
1.25mm (49.2mil) |
0.22-0.25mm (9-10mil) |
12mm (47.2mil) |
0.10-0.125mm (3.94-4.92mil) |
1.7-2.0 |
0.69-0.83 |
|
QFP |
0.4mm (15.7mil) |
0.25mm (9.84mil) |
1.25mm (49.2mil) |
0.2mm (7.87mil) |
1.20mm (47.2mil) |
0.10-1.25mm (3.94-4.92mil) |
1.6-2.0 |
0.68-0.86 |
|
QFP |
0.3mm (11.8mil) |
0.20mm (9.84mil) |
1.00mm (39.4mil) |
0.51mm (5.91mil) |
0 0.95mm (37.4mil) |
0.075-1.25mm (3.94-4.92mil) |
1.5-2.0 |
0.65-0.86 |
|
0402 |
N/A |
0.5mm (19.7mil) |
0.65mm (25.6mil) |
0.45mm (17.1mil) |
0.6mm (23.6mil) |
0.25-0.15mm (4.92-5.91mil) |
N/A |
0.84-1.00 |
|
0201 |
N/A |
0.25mm (9.84mil) |
0.4mm (15.7mil) |
0.23mm (9.06mil) |
0.35mm (13.8mil) |
0.075-0.125mm (2.95-3.94mil) |
N/A |
0.66-0.89 |
|
BGA |
1.27mm (50mil) |
Ø0.80mm (31.5mil) |
N/A |
Ø0.75mm (29.5mil) |
N/A |
0.15-0.20mm (5.91-7.87mil) |
N/A |
0.93-1.25 |
|
µBGA |
1.00mm (39.4mil) |
Ø0.3mm (11.8mil) |
N/A |
□0.35mm (11.0mil) |
□0.35mm (13.8mil) |
0.115-0.135mm (4.53-5.31mil) |
N/A |
0.67-0.78 |
|
µBGA |
0.50mm (19.7mil) |
Ø0.3mm (11.8mil) |
N/A |
□0.28mm (11.0mil) |
□0.28mm (11.0mil) |
0.075-0.125mm (2.95-3.94mil) |
N/A |
0.69-0.92 |
|
Flip chip |
0.25mm (10mil) |
0.12mm (5mil) |
0.12mm (5mil) |
0.12mm (5mil) |
0.12mm (5mil) |
0.08-0.1mm (3-4mil) |
N/A |
1.0 |
|
Flip chip |
0.2mm (8mil) |
0.1mm (4mil) |
0.1mm (4mil) |
0.1mm (4mil) |
0.1mm (4mil) |
0.05-0.1mm (2-4mil) |
N/A |
1.0 |
|
Flip chip |
0.15mm (6mil) |
0.08mm (3mil) |
0.08mm (3mil) |
0.08mm (3mil) |
0.08mm (3mil) |
0.025-0.08mm (1-3mil) |
N/A |
1.0 |
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