HSDL-3610 Datasheet, PDF (26/28 Pages) AVAGO TECHNOLOGIES LIMITED – IrDA® Data Compliant 115.2 kb/s 3 V to 5 V Infrared Transceiver

3.3 Y-axis Misalignment of
Castellation
In the Y-direction, the unit does
not self align after solder reflow.
It is recommended that the unit
be placed in line with the fiducial
mark. This will enable sufficient
land length to form a good joint.
See Fig. 5.0.
Tx LENS
Rx LENS
FIDUCIAL
EDGE
Y
Figure 5.0. Section of a castellation in Y-axis.
3.4 Example of Good Castellation Solder Joints
Photo 6.0. Good attachment before reflow.
Photo 7.0. Good solder joint after reflow.
This joint is formed when the
printed solder paste volume is
adequate, i.e. 0.30 cubic mm and
reflowed properly. It should be
reflowed in IR Hot-air convection
reflow oven. Direction of board
travel does not matter.
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