July, 2014
www.us-tech.com
Seeking EMS Quality and Customer Satisfaction Continued from previous page
OEM designs may not invite this ap- proach. But instead of forcing design rules on its clients, MC Assembly at- tempts to optimize the initial de- signs by means of its extensive DFx services. The use of custom thermal profiles for each PCB assembly helps ensure optimum solder flow and coverage. Raw materials are aggressively
screened at incoming inspection with the goal of detecting and removing nonconforming components. To main - tain control, part number assignments unique to each customer are given to all raw materials. The incoming material quality-
control system integrates a variety of tools to ensure that the correct raw materials are being received, includ- ing optical bar-code readers with em- bedded radio-frequency (RF) commu-
...instead of forcing design
rules on its clients, MC As- sembly attempts to opti-
mize the initial designs by means of its extensive DFx services. The use of
custom thermal profiles for each PCB assembly helps ensure optimum solder flow and coverage.
nications, configuration management (CM) tools to verify tolerances for all mechanical components, board fabri- cation core laboratories for verifying complex raw PCBs, and electrical measurement tools for incoming in- spection. In addition, extensive quality histories are maintained for every part ever purchased. Once kits are pulled from indi-
vidual stocking locations, off-line SMT setup and validations are used
Depending on the project, some hand assembly may be required.
recorded within the paperless system for analysis, reporting, and correc-
tive actions. When visual verification is not possible, powerful x-ray tools
Page 33
are available to inspect solder reflow and other circuit features. Such man- ufacturing process support is backed by considerable test capability, with test systems that can measure PCB assemblies and box builds for re- quirements established by their cus- tomers or by MC Assembly for its customers. Robust quality management
system (QMS) gear at the three plants reinforce the manufacturing process and test equipment. The QMS equipment and procedures ap- plied at each facility are focused on the specific needs of each customer and the specific markets that they serve.
All three manufacturing centers Continued on page 35
X-ray inspection is an important part of maintaining quality control
to ensure that the correct compo- nents are loaded onto the correct feeders. Scanners at the SMT base platforms are used for final verifica- tion that the right feeders are in- stalled in the correct sequences as well.
Paste Height Inspection When the manufacturing pro -
cess begins at MC Assembly, auto- mated three-dimensional (3D) paste height inspection, color in-line auto- mated optical inspection, and a pa- perless work flow system monitor in- process manufacturing activity and verify that the highest quality stan- dards will be maintained. First-pass SMT, in-circuit test (ICT), functional capacity test (FCT), and functional quality audit (FQA) testing are
See at SEMICON West, Booth 5743
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