March, 2024
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placement errors and pinpoint the causes, the production team at Smart Modular chose Saki’s 3Di series inline AOI platform. They worked with technical and sales staff to configure an opti- mal solution that would meet their needs. The 3D AOI series has great
expandability and flexibility with the advanced optical head with Z-axis and quad side-cam- era options with full and deeper inspection coverage. This, com- bined with advanced inspection algorithms permits both high ac- curacy and a fast cycle time.
Inspection Challenges Working with Saki to deter-
mine the ideal setup to meet their quality and productivity goals, Smart Modular added a second Saki 3Di AOI system to the line to inspect 100% of the boards emerging from the reflow oven. In addition to encountering typical soldering issues such as tombstoning, head-in-pillow, and solder spattering, which the 3Di detects using state-of-the-art al- gorithms, assemblies such as memory modules and peripheral cards can suffer from problems such as solder spots on gold con- tacts. These types of defects can compromise the durability of the low-ohmic gold finish, while also spoiling the appearance and so compromising the perception of product quality. In addition, thicker solder deposits can also impair insertion of the module during use. These solder spots are
known to be difficult to detect against a gold finish when using
older AOI equipment. The light- ing subsystems and detection al- gorithms can be relatively insen- sitive to the low contrast be- tween the color and surface char- acteristics of the reflowed solder and the gold plating. Saki’s engi- neers have overcome this, en- abling unwanted solder spots to be detected automatically so that affected units can be repaired be- fore leaving the factory. Now that the equipment is
up and running in Smart Modu- lar’s factory, operators have been able to assess its overall per-
formance and contribution to en- hancing the company’s output. They particularly appreciate the overall accuracy, detecting de- fects with a high level of certain- ty while also maintaining a very low number of incorrect no-go re- sults.
“We have experienced very
low numbers of false positives, which is a strength of the Saki 3Di systems that we strongly ap- preciate,” said Smart Modular’s Vejay Kumar, VP of WW Special- ty Memory Manufacturing. “By creating a stable parts database,
Page 37
Saki Inspection Boosts QA at Smart Modular Technologies Continued from previous page
and with the flexibility of the re- pair station, we can run the line for extended periods without stoppages and without needing operators to intervene. The AOI supports the work of our trained inspectors and lets them perform their own assessments on the boards, carefully, at the end of the line without slowing down production.” Contact: Saki America, Inc.,
2400 Huntington Boulevard, Hoffman Estates, IL 60192 % 908-797-5423 Web:
www.sakicorp.com r
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