HUAWEI MC509 Series CDMA LGA Module
Hardware Guide
Mechanical Specifications
Issue 02 (2013-05-06)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
66
When the PCB layout is double sided, it is recommended that the LGA module
be placed on the second side for assembly; so as to avoid module dropped from
PCB or component(located in module) re-melding defects caused by uneven
weight.
6.9 Assembly Processes
6.9.1
General Description of Assembly Processes
Tray modules are required at SMT lines, because LGA modules are placed on
ESD pallets.
Reflow ovens with at least seven temperature zones are recommended.
Use reflow ovens or rework stations for soldering, because LGA modules have
large solder pads and cannot be soldered manually.
6.9.2
Stencil Design
It is recommended that the stencil for the LGA module be 0.15 mm in thickness. For
the stencil design, see the following figure: