5546 pads results

Electronics Forum: pads (Page 89 of 555)

QFN aligment issues

Electronics Forum | Mon Jul 09 18:11:20 EDT 2012 | rsikora

Your selection of pads to use as Fids will be critical. In your pictures of the QFN component, the pcb pads are primarily non-solder mask defined, but on 3 sides of the QFN the corner pads become solder mask defined due to the copper ground flood.

LED on the board

Electronics Forum | Thu Jul 12 05:22:00 EDT 2012 | rob

Hi George, The extra pad is just for mechanical strength, it's not connected. As the Liteon LED is just a side view & nothing special you may get lucky and find that a someone like Rohm, Avago or Osram make something without the centre pad that stil

Screening of Pads and Traces onto Existing PCBS

Electronics Forum | Mon Aug 27 18:16:32 EDT 2012 | bandjwet

Some time ago I ran into 2 companies in the US providing screen printing of PCBs where traces and pads and jumpers could be added to existing high volume unpopulated assemblies. Does anyone know of such suppliers in the US (one of our customers wan

BGA paste dispensing?

Electronics Forum | Fri Sep 07 16:37:47 EDT 2012 | burb1999

Ive used the Camalot long time ago to dispense paste on BGA pads after removal then reflow with a machine such as the AirVac. What is the best way to do BGA repair on pads? Ive read alot just reball the bga then put it back on? Todd

Problems with diode during wave soldering

Electronics Forum | Thu Sep 13 18:00:35 EDT 2012 | mark25y2001

possible problem are loading orientation, solder flow cannot reach the pad portion due to trap of the body of the diode... or try to adjust turbulent but observe overflow... because turbulent are penetrate solder to pad and terminal of the diode. ho

Reflow problem

Electronics Forum | Wed Sep 26 16:42:06 EDT 2012 | ferrog

Per the pictures you sent it may be a Pad Design issue, you need to go to the Part Number Spec and Look for Suggested Pad Layout

Reflow problem

Electronics Forum | Wed Sep 26 18:30:41 EDT 2012 | garym4569

Thanks for the input everyone. We had also suspected pad design, but wanted to get input from other sources. The design engineer has implemented revised pad design in a revision set for production next week. Thanks again, Gary M

Isolating QFN Ground

Electronics Forum | Fri Mar 15 15:51:26 EDT 2013 | rway

Is this for something permanent? Where is the ground pad located (mid-bank, bank-end etc.)? What is the lead pitch? Are you looking on rerouting this pin some place else? Can you provide a picture of the pad in question?

QFN PCB Pad no Drain Hole

Electronics Forum | Fri May 17 14:56:21 EDT 2013 | davef

There's not supposed to be any effin 'drain hole.' Where's you get that from? Read this: http://blogs.smtnet.com/smt/other/qfn-btc-design-guidelines-thermal-pads-etc/ BR davef