IPC-TM-650 EN 2022 试验方法1.pdf - 第346页
T able 1 Stencil IPC-A-21 (0.2 mm Thick) Pad size 0.63 x 2.03 mm P ad size 0.33 x 2.03 mm Spacing mm Hor . Ve rt. Spacing mm Hor . Ve rt. 0.79 0.45 0.71 0.40 0.63 0.35 0.56 0.30 0.48 0.25 0.41 0.20 0.33 0.15 0.10 0.08 T …
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Table 1
Stencil IPC-A-21 (0.2 mm Thick)
Pad size 0.63 x 2.03 mm Pad size 0.33 x 2.03 mm
Spacing
mm Hor. Vert.
Spacing
mm Hor. Vert.
0.79 0.45
0.71 0.40
0.63 0.35
0.56 0.30
0.48 0.25
0.41 0.20
0.33 0.15
0.10
0.08
Table 2
Stencil IPC-A-20 (0.1 mm Thick)
Pad size 0.33 x 2.03 mm Pad sie 0.2 x 2.03 mm
Spacing
mm Hor. Vert.
Spacing
mm Hor. Vert.
0.45 0.30
0.40 0.25
0.35 0.20
0.30 0.175
0.25 0.15
0.20 0.125
0.15 0.10
0.10 0.075
0.08
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Figure 1 Slump test stencil, IPC-A-21
Spacing
Spacing
Vertical
Rows
Pad Size:
0.33 x 2.03 mm
—18 identical pads per row
—Same spacings each row
Pad Size:
0.63 x 2.03 mm
—14 identical pads per row
—Same spacings each row
Spacing Spacing
33mm .41 .48 .56 .63 .71 .79 .71 .63 .56 .48 .41 .33mm
IPC-TM-650
Number Subject
Date
Revision
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