When electronic assemblies are inspected with the aid of an AOI-system (Automated Optical Inspection), it sometimes happens that products are rejected based on deviating colour or degree of gloss. Often the bare board supplier gets the blame or there is [...]
This question we hear at our trainings from time to time. We sometimes even encounter “artists” that have already tried to replace BGA’s (Ball Grid Arrays) with common household appliances and tools. This includes tools such as paint strippers etc. [...]
In practice, many people do not seem to be clear about what is meant when they talk about rework, repair and touch-up. In this article we will try to provide some clarity. A wire in a wiring harness is [...]
The qualified rework of a Ball Grid Array (BGA) involves the reworking of a BGA component on a circuit board, i.e. replacing a defective BGA or removing and properly replacing an incorrectly positioned BGA. What are BGA‘s? BGAs are microprocessors/components [...]
Example of Mid-Chip solder balls (beads) The IPC-A-610H states that solder balls are acceptable for all product classes provided they are entrapped or encapsulated e.g. in no-clean flux residue, under conformal coating, soldered to a metal surface, [...]
During the immersion, wave or selective soldering processes and in the HASL finish application processes, metals will dissolve in the liquid solder. The degree of dissolution depends on the base materials used (finishes on tracks and component leads/metallization’s), solder [...]
Wires and wire harnesses have become indispensable in the electronic connection industry. In each and every appliance, no matter how small, we find wires. Wires and the way they are attached with the other parts of the electronic products [...]
Recent developments have once again confronted us with the facts. Entire car factories came to a standstill because there were no parts and the new cars could not be finished due to the lack of a few components. Necessary microchips [...]
One of the Gull-Wing (*) style components are called QFP components. It is a component from the Gull-Wing family of SMD components, other Gull-Wing family styles are SOT, SOD and SOIC components. The specific property of the QFP or Quad [...]
A focus on the IPC-A-610 and IPC J-STD-001 Why this article? The IPC-A-610 and the IPC J-STD-001 are complementary standards, but each has its own purpose. However, it is not always clear to everyone what the specific uses of both [...]
