Datasheet

15
Recommended Solder
Paste/Cream Volume for
Castellation Joints
Based on calculation and experi-
ment, the printed solder paste
volume required per castellation
pad is 0.22 cubic mm (based on
either no-clean or aqueous solder
cream types with typically 60% to
65% solid content by volume).
Using the recommended stencil
results in this volume of solder
paste.
Pick and Place
Misalignment Tolerance
and Self-Alignment after
Solder Reflow
If the printed solder paste volume
is adequate, the HSDL-3201 will
self align after solder reflow.
Units should be properly reflowed
in IR/Hot Air convection oven
using the recommended reflow
profile. The direction of board
travel does not matter.
Direction Definition
Tolerance for X- axis
Alignment of Castellation
Misalignment of castellation to
the land pad should not exceed
0.2 mm or about one half the
width of the castellation during
placement of the unit. The
castellations will self-align to the
pads during solder reflow.
Tolerance for Rotational
(θ) Misalignment
Mounted units should not be
rotated more than ± 3 degrees
with reference to center X-Y as
shown in the direction definition.
Units that are rotated more than
± 3 degrees will not self align
after solder reflow. Units with
less than a ± 3 degree misalign-
ment will self-align after solder
reflow.
Allowable Misalignment
Direction Tolerance
X ≤ 0.2 mm
Y See text
θ≤ ± 3 degrees
Y- axis Misalignment of
Castellation
In the Y direction, the HSDL-3201
does not self align after solder
reflow. Agilent recommends that
the part be placed in line with the
fiducial mark (mid-length of land
pad.) This will enable sufficient
land length (minimum of one half
of the land pad) to form a good
joint. See the drawing below.
Y
θ
X
MINIMUM 1/2 THE LENGTH
OF THE LAND PAD
EDGE
FIDUCIAL