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Laser Reflow Soldering - A Process Solution Part II (.PDF)
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Laser Reflow Soldering - A Process Solution Part II (.PDF)
 
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Laser Reflow Soldering - A Process Solution Part II (.PDF)
From efd-inc.com
With the use of laser light for reflow having been established, all that remains is to apply it to best effect. Each time a laser is fired, it pumps a specific amount of energy at a particular wavelength to a particular point in space. Where technique comes in is choosing where and for how long to apply that light along with the application of accessory equipment to optimize solder paste reflow. This presentation covers the specifics of how to determine which process choices are the right process choices based on the needs of your product to maximize yield and throughput. The first requirement is finding a method to present or fixture the product to best facilitate both dispensing of solder paste and delivery of laser light. For the most consistent solder paste dispensing, each part needs to be located with the same relative position to the dispense tip in the Z axis. The distance from the bottom of the dispense tip needs to be between 1/4th and 1/6th the diameter of the deposit being made to ensure consistent release from the tip and to avoid blocking of the tip by hitting the product. If the gap is too small, the tip can be blocked. If the gap is too large, the paste can remain stuck to the dispense tip.
 


Products & Services
Brazing and soldering services use welding techniques and related processes to fabricate parts and join components.
Label applicators are used to dispense, apply, or print and apply labels to packages.
Surface mount technology (SMT) manufacturing equipment is used to populate printed circuit boards (PCB). This includes soldering machines, ovens, component placement, paste depositors and screen and stencils.
Single component diaphragm valves are designed to provide a precise fluid supply depending on the application. The dispensed output can be a bead, dot or fill
Cyanoacrylate adhesives are one-part acrylate adhesives that cure instantly on contact with mated surfaces through a reaction with surface moisture. Cyanoacrylates are often called super glues. 
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Product Announcements
Bellman-Melcor LLC - Brazing Paste & Powder
Brazing paste is a combination of alloy in powder form, a binder and many times a flux. This combination can be an ideal way to improve production efficiency with automation. In addition, certain... (read more)
EFD, Inc. - EFD Tabletop Laser Soldering System
EFD Solder Paste Group and Leister Technologies LLC have recently introduced a laser soldering system which consists of EFD's auger valve and TT tabletop dispensing robot, and Leister's Novolas™... (read more)
Mill-Max Mfg. Corp. - Organic Fibre Plug® Receptacle & Pass Thru Sockets
Mill-Max Organic Fibre Plug® receptacles and sockets are discrete sockets for soldering into printed circuit boards. Ten sizes are now available with ranges of pin acceptance from 0.012 –... (read more)
EFD, Inc. - Colorless No Clean Flux with Anti-slump Features
EFD's Solder Paste Group has introduced a new colorless no-clean flux for use in their PrintPlus® and SolderPlus®solder paste product lines. (read more)
Fishman Corporation - AirFree™ Integration Kits
System integrators who demand performance have found that eliminating unreliable air pressure with NoFlex™ Linear Drive (LDS) technology achieves the highest repeatability from a polypropylene... (read more)
EFD, Inc. - Solve Problems in your Dispensing Process
For adhesives, epoxies, solder, paste fluxes, RTV/sealants & solder resists and many temperature-sensitive materials temperature changes as small as 1ºC can make or break a process. Elevated material... (read more)
EFD, Inc. - Fluid Dispensing Kit
EFD's Ultra® 1400 Dispensing Kit is a cost-effective way to apply uniform amounts of threadlockers and other adhesives in benchtop assembly processes. Its fast, consistent application increases... (read more)
Coto Technology - Ultra Miniature 9800 SMD Relay
Coto Technology of Providence, Rhode Island, is now utilizing a higher temperature solder & solder paste for internal connections on its ultra-miniature 9800 series Surface Mount Relays. (read more)
Wieland Electric Inc. - Through Hole Reflow Connectors
Wieland Electric expands PCB connector offering to include Through Hole Reflow (THR) compatible headers and terminal blocks. Available in tape on reel, tray, or tubes to accommodate automated pick and... (read more)
Mill-Max Mfg. Corp. - Bottom Entry Sockets
Features of Mill-Max Bottom Entry Socket: • Sensitive components such as microphones must be hand soldered or socketed because the Mylar diaphragm inside the microphone would melt if it were... (read more)
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Topics of Interest
Solder paste dispensing is not a new process. However, today’s microelectronics present a daunting array of technical challenges to meet deposit size requirements. The need for better paste... (Read More)
EFD Inc. and Leister USA have collaborated to bust the myth that you cannot perform laser reflow with solder paste. Using Leister diode lasers, EFD has formulated solder pastes that survive the rapid... (Read More)
All current EFD literature is available in PDF format for the convenience of our visitors. Adobe Acrobat Reader is required for viewing. If you do not have it, download it for free here. This paper... (Read More)
Air-powered dispensing systems use controlled pulses of air pressure to dispense solder paste from syringe reservoirs in uniform amounts. Air-powered dispensing equipment comes in many shapes and... (Read More)
The process of dispensing solder paste began with pneumatics. Whether a hand-held gun, or an automated workstation, whether a diaphragm, spool, needle, or piston, such dispensers depend on a column of... (Read More)
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Technical Articles
Laser Reflow Soldering - A Process Solution Part II (.PDF) - Machine Tools
Laser Reflow Soldering - A Process Solution Part I (.pdf) - Machine Tools
Solder Paste White Papers - Liquid Handling Equipment
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