smd components

[wmcgonegal at rr.etc.ncr.doe.ca]

     I have read about a type of solder designed for removing SMDs.  You 
     apply it to the terminals of the device and it combines with the 
     solder that was originally holding the device in place.  The new 
     combination of solder forms a very weak alloy.  The devices can then 
     be popped off when gently pried with a screwdriver.  With the device 
     removed you clean up the solder then mount the new device with regular 
     solder.  I forget the name of the company that makes this removal 
     solder, but I can look it up if there is any interest.
     
     Will McGonegal
     Mobile Sources Emissions Division
     Environment Canada
     wmcgonegal at rr.etc.ncr.doe.ca