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Richard Erlacher
03/05/12 16:30
Read: 444 times
Denver, Co
USA


 
#186436 - It doesn't have to be a PITA ...
Responding to: Dejan Durdenic's previous message
I used an ethernet PHY in this package back in '03 and found that, with proper pad shape and location, it was pretty easy to make 'em stick and make good solder joint. The solder paste has to be quite uniform, though. Hand soldering the prototypes, particularly before the pad shape and dimensions were worked out, was quite an exercise. When the parts didn't work properly, it was hard to guess whether they'd been overheated or simply lacked good contact. Further, there was a heatsinking surface on the underside that was hard to get hot enough. Providing an exit path for the heat was another interesting exercise.

RE

List of 21 messages in thread
TopicAuthorDate
Precision32 - SiLabs jumps on Cortex-M3 bandwagon      Andy Neil      03/03/12 05:54      
   QFN indicates PLCC, doesn't it?      Richard Erlacher      03/03/12 08:15      
      QFN is "lead-less"        Jan Waclawek      03/03/12 08:41      
         harder to mount      Andy Neil      03/03/12 08:49      
            Glue      Per Westermark      03/03/12 09:03      
               Glue and reflow?      Dejan Durdenic      03/03/12 09:10      
                  Cyanoacrylic type glue      Kalpak Dabir      03/03/12 20:26      
                     Is it used in mass production?      Dejan Durdenic      03/04/12 01:55      
                        I was wrong about the glue type for manufacture      Kalpak Dabir      03/04/12 02:38      
                           Nevertheless...      Dejan Durdenic      03/04/12 07:42      
                              Dispense      Per Westermark      03/04/12 07:58      
                                 Again...      Dejan Durdenic      03/05/12 14:13      
               re: Glue      Rob Klein      03/05/12 10:23      
         I hope this becomes standardized ...      Richard Erlacher      03/03/12 15:39      
            Eh??      Andy Neil      03/04/12 12:23      
               It seems that the industry's heading for a consensus      Richard Erlacher      03/05/12 07:39      
            PLCCs marked QFN      Oliver Sedlacek      03/05/12 02:56      
               Anyway,      Dejan Durdenic      03/05/12 14:18      
                  It doesn't have to be a PITA ...      Richard Erlacher      03/05/12 16:30      
                     That's the point!      Andy Neil      03/05/12 17:42      
                        Yes, and your starting point matters a great deal      Richard Erlacher      03/05/12 21:48      

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