3.1 Tolerance for X-axis Alignment
of Castellation
Misalignment of castellation to
the land pad should not exceed
0.2 mm or approximately half the
width of the castellation during
placement of the unit. The
castellations will completely self-
align to the pads during solder
reflow as seen in the pictures
below.
Photo 1.0. Castellation misaligned to land pads in x-axis before
reflow.
Photo 2.0. Castellation self-align to land pads after reflow.
3.2 Tolerance for Rotational (Theta)
Misalignment
Units when mounted should not
be rotated more than ± 2 degrees
with reference to center X-Y as
specified in Fig 2.0. Pictures 3.0
and 4.0 show units before and
after reflow. Units with a Theta
misalignment of more than 2
degrees do not completely self
align after reflow. Units with ± 2
degree rotational or Theta
misalignment self-aligned
completely after solder reflow.
Photo 3.0. Unit is rotated before reflow.
Photo 4.0. Unit self-aligns after reflow.
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
