SELECTIVE SOLDERING
By Suntronic Inc.
By Suntronic Inc.
WHAT IS SELECTIVE SOLDERING?
SelectiveSolderingisthe processofsolderingcomponentstothePCB.The componentsareselectedbasedonaprogramthatusesPCBimages.
SelectiveWaveSolderingmachineshelptoachieveconsistentqualityand process controlwhenassemblingboardsthathavemultiplegrounds,power planes,ordense populationsofSMTcomponentsonbothsides.Our equipmentisalsoset upto support bothTin/Leadprocessesandlead-free processeswithinterchangeablesolder pots.
STEPS OF SELECTIVE SOLDERING
Step 1 -Programthe selectivesoldering machineusingcentroidfileswhicharederived fromGerberFiles.
Step 2 -Boardsthat aretobesolderedarekeptontheconveyorbeltandinsertedinthe machine.
Step 3 -Fluxisappliedonthe boardtoremove theoxidizedmetallayer. Which isthen activatedbyheatingtheboardsat100degrees.
Step 4 -Eachandeverythrough-holecomponentsaresolderedontheboard withthehelpof solderfountain.
• SizeofPCB • SolderType • Nozzles • Nitrogensupply • SolderPots • SolderFlux FACTORS TO CONSIDER FOR SELECTIVE SOLDERING PROCESS:
ADVANTAGES FOR SELECTIVE SOLDERING
• Selectivesolderingallowsthe operatortoprogramtheexactspotsfor applying the moltensolder. • Machineoperatorscaneasilysetthe temperatureandsolderamount. • SelectiveSolderingproducesreliablesolderjoints. • Differentparametersaresetforeachcomponenttoensure effectiveness. • Itrequiresnoexpensivewave solderpallets. The overallprocessiscost-effective.
WHAT IS WAVE SOLDERING?
Wavesoldering the solderingprocess.Itisalso knownas is aclosedprotectivegasatmosphere.Inthisprocess boardpasses a waveofsolder.
is
automatedPCBA
flow soldering,it
usuallyperformedin
the
over
Thewavesolderingprocesshasfollowingadvantages: • EasySetup • RapidProcess • LowCosts
DISADVANTAGES OF WAVE SOLDERING? • Higherconsumptionofsolder,fluxandelectricity • SensitivepointsonPCBsneedstobemasked • Post-wavesolderreworkincreased • Additional cleaningofwavesolderaperturepalletsormasks
WHY CHOOSE SELECTIVE SOLDERING OVER WAVE SOLDERING?
Itisgenerallyrecommended tochooseselectivesoldering wave soldering assemblies thefollowingreasons:
• Iftallcomponentsareinvolvedthen,theymaystopthewavefrom solderingtheboard
• Manualsolderingbecomesdifficultwhenboardswiththickcopper layersfor and areinvolved.
• Itbecomesdifficulttosolderthrough-hole ifplacedin
• Wavesoldering of is during the
over
for through-hole
for
properly.
ground
powerplanes
pins
dense configuration.
canproduceexcessiveconsumption
NitrogenifNitrogen
run
process.
CONTACT US
Suntronic has been providing expert PCB assembly services. Feel free to contact us today to know more about our selective soldering capabilities and other PCB assembly capabilities. Our experts would be happy to answer your queries regarding the services we offer and make the right decision regarding choice of components. www.suntronicinc.com info@suntronicinc.com (281) 879-9562
