CFD SIMULATION OF SOLDER PASTE FLOW AND DEFORMATION BEHAVIOURS DURING STENCIL PRINTING PROCESS
Solder paste printing basics slide share
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Business Electronics Soldering Technologies Solder Paste Printing Basics Bob Wettermann MIT
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Transcript of Solder paste printing basics slide share
Business Electronics Soldering Technologies
Solder Paste Printing BasicsBob Wettermann
MIT
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Printing Load Align Squeegee
Blades Enclosed Head Technology
Inspect / Paste problems
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Load / Align Manual Automated
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Load Manual Automated
Paste Printing
PCB
Camera
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Squeegee Metal Polyurethane / rubber Rolls paste across apertures 30O-60O angle of attack
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Squeegee Metal
Stainless Nickel alloy
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Squeegee Metal Polyurethane / rubber Rolls paste across apertures 30O-60O angle of attack
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Squeegee Metal Polyurethane / rubber Rolls paste across apertures 30O-60O angle of attack
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Stencil
PCB
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Printing Squeegee
Speed .2 – 8 in/ sec Pressure
.7 – 1.5 lbs Faster = higher
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Separation Separation distance
Very slow To transport height
Quick
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Separation Separation distance
Far enough for “Snap off” Very slow (.01”/sec)
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Separation Separation distance
Too fast Leaves paste
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Good Solder
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Slump
Too much heat Paste too thin
(Low viscosity)
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Dog Ears
Snap off too fast Squeegee too fast
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Bleed out
Pressure too high Poor gasket
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Scooping
Damaged squeegee Too much pressure
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Torn prints
Snapoff too fast Clogged stencil
Paste Printing
Your BEST choice in Solder Rework/Repair, Solder Training & Soldering Tools
Paste Inspection / Problems Paste left on Screen
Damaged squeegee Pressure too low Speed too high
Paste Printing
Business Electronics Soldering Technologies
Solder Paste Printing BasicsBob Wettermann
