Printed circuit board assembly is hot nowadays. If you search Google for Printed circuit board assembly, results of all the first pages are swarmed by PCB assembly conglomerates with names like Printed circuit board wizards and PCB reveal. Is there a quick and witty way to assess your competency of these reputable companies Dr. Lasky from Indium Corporation shed some a shine on this question during his blog entry branded An SMT PCB Putting your equipment together Competency Screening Quiz. Malcolm Gladwell, the author on Blink, claims that always the best judgments could be made quickly with recently a sampling data.
Based on this notion, Dr. Lasky listed inquiries to ask a lead process engineer in an gathering company . What is very much the composition of SAC . What are jar whiskers . In a new stencil aperture, what is almost certainly the area ratio out. What is an approximate peak heat for a reflow your oven in leadfree assembly of. A board is inspected after war soldering and one prospect is not soldered so that you the board.
The board is use through the wave solder machine again and has actually the same defect within the same lead. What may be the most likely cause of this defect a. The solder temperature is too little. b. The pad on the board is almost certainly oxidized. c. The pre-heat temperature is too extreme. . What are local fiducials on the latest PWB for . Will thixotropic mean in affect to solder pastes is. A chip shooter places passives at an interest rate of , per an hour.
printed circuit board assembly is placing passives on a PWB, just how many seconds will the chipshooter take to place a person’s passives on one barrier . A reflow your oven belt speed is cmmin. The PWB is centimeters long. What is minimal cycle time that some sort of oven can support really. What is tombstoning If one can alternative correctly on these questions, heshe might have most sense on PCB fitting. To see the answers, ask the Indium experts on PCB structure materials.