LCC/LGA Module Series
Module Secondary SMT User Guide
Module_Secondary_SMT_User_Guide 15 / 25
The stencil aperture should be designed into
diagonal-patterned lines with 60% area of
the corresponding pad.
SC20
1. The stencil thickness of the area for the
module should be partly stepped-up to
0.18-0.20mm.
2. For pads on four sides:
The innermost edge of the aperture for each
single pad should be shifted outward by
0.20mm and the outermost edge should be
shifted outward by 0.60-0.80mm, while width
should be reduced in a ratio of 1:0.85. And
should be shaped into rectangle with round
chamfers.
3. For square pads in the center, the stencil
aperture area should be 70% of that of the
corresponding pad.
4. There is no need to design stencil aperture
for the arc-shaped pad in blue box.
SC60/SC600T/
SC600Y
1. The stencil thickness of the area for the
module should be partly stepped-up to
0.18-0.20mm.
2. For pads on four sides (in blue boxes), the
innermost edge of the aperture for each
single pad should be shifted outward by
0.20mm and the outermost edge should be
shifted outward by 0.60-0.80mm while the
width should be reduced in a ratio of 1:0.85.
And the shape should be rectangle with
round chamfers.
3. For square pads between the two red boxes,
the stencil aperture area should be centered
with area reduced to 85% and designed with
round chamfers.
4. For round pads in the center (in the green
box), the stencil aperture should be centered
with area reduced to 70%.
5. For pads at the four corners of the module,
the stencil aperture should be designed into
diagonal-patterned lines with 60% area of
the corresponding pad.
6. There is no need to design stencil aperture
for the four arc-shaped pads.
