Methods of effective and ecological recycling of printed circuit boards (PCBs) are searched all over the world at this time. The material composition and temperature properties of PCB are necessary to be known for an optimal recycling technology.
For this purpose we analyzed weight ratio of the electronic components moulded on the selected kinds of PCBs and next we formulated mathematic model of temperature field in PCB during a grinding process in that the metal layers are separated from the plastic elements. We present the obtained results in this paper.
I have designed 4 Layer PCB with one 28 pin QFN PKG. I have got complaint from Production that the pads which connected to thermal pads (gnd) thru trace is bridging with solder and because of this bridge, pins are not getting soldered properly... »»
Our facility is typically a high mix low volume site, but lately we are getting increments on our requirements therefore we are kind of struggling to cool down our ovens before to change over a different recipe... »»
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SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore