1.2 Adjacent Land Keep-out and
Solder Mask Areas
Note: Wet/Liquid Photo-Imaginable solder resist/mask is recommended.
Dim.
mm
Inches
min. 0.008
0.528
h
j
min. 0.2
13.4
4.7
k
l
0.185
3.2
0.126
j
Tx LENS
Rx LENS
• Adjacent land keep-out is the
maximum space occupied by
the unit relative to the land
pattern. There should be no
other SMD components within
this area.
LAND
k
h
SOLDER
MASK
Y
• “h” is the minimum solder
resist strip width required to
avoid solder bridging adjacent
pads.
l
• It is recommended that 2
fiducial cross be placed at mid-
length of the pads for unit
alignment.
Figure 3.0. HSDL-3612-007/-037 PCBA – Adjacent land keep-out and solder mask.
2.0 Recommended Solder Paste/
Cream Volume for Castellation
Joints
Based on calculation and
experiment, the printed solder
paste volume required per
castellation pad is 0.30 cubic
mm (based on either no-clean or
aqueous solder cream types with
typically 60 to 65% solid content
by volume).
16
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