The existing production area was increased from about 500 square meters to 1100 square meters. After realignment, JUMO now has more than three complete assembly lines, capable of placing up to 90,000 components per hour. Three-shift operation is a requirement for a high assembly capacity, that can quickly respond to customer requests. Production is set up to be flexible, allowing both minimal quantities and major series to be produced, as required by the customer.
With these new systems, it is now possible to assemble micro-BGAs with minute basic grids.
The components used by JUMO have an edge length of 10 mm with 256 solder balls. The distance between the balls is a mere 0.27 mm.
Process qualification has been executed, both for these micro-BGAs and for the 0201 design (size 0.5 mm x 0.3 mm).
To safeguard the high level of quality, all the assembled electronic modules are checked on automatic, optical inspection systems (AOI). These check that all the required components are there, as well as their solder quality. Polarity check and character recognition options are available, as is laser height measurement.
Various systems can be used for electrical testing, depending on the requirement.
Functionality testing takes place on product-specific PC test stations or by means of flexible test systems.
An x-ray system is used for process qualification, particularly for the hidden solder joints found on BGAs. Metallurgical investigations and material analyses (EDX) can also be carried out in the JUMO material testing laboratory. The equipment there is also used for failure analysis.
Various methods are used for panel separation. Roller cutters and linear separators are used for scored panels and milling machines for appropriately prepared PCB panels, subject to the quality requirements. Separating the panels with a milling machine is stress-free, both for the PCB and for the components (no mechanical stress).
Electronic modules to be used in critical climate areas can be cleaned in-house at JUMO and given a protective coating (increases the climatic rating).
All soldering processes – from reflow soldering to wave soldering to selective soldering – take place in a protective atmosphere (N2). For wave soldering, one system is operated with lead-based solder and one with lead-free solder.
Having these systems in place enables JUMO not only to position its own products on the global market, but also to steadily increase its options in the EMS services segment. Meanwhile, more than 30% of the assembled and tested electronic modules are destined for EMS customers.