Module Assembly - Tabbing and Stringing

Most solar modules in use today are assembled using a process where solder coated copper ribbons are soldered or tabbed to individual cells and those cells are strung in series to create the final module. Electricity generated by this array is ultimately routed to a central junction box and distributed to the main system. Alpha fluxes, pastes, preforms and cored wires are used in this process.

Key Requirements for Joining Materials

High activity, low residue fluxes for spray or dip applications
Fluxes compatible with popular encapsulants
Low spatter, high activity cored wires
High solder volume precision preforms

Product Type	Product Name	Low Temp	PB Free	Halogen Free	VOC Free
Solder Paste	ALPHA OM-5100 Consistent fine-feature print volume repeatability Low post reflow residue Minimizes random solder balling
Solder Paste	ALPHA OM-550 Best mechanical performance of Alpha’s low temperature solder alloys Repeatable printing down to 0.3mm/.012” pitch and 01005 passives Low contact resistant Uniform IMC No silver leaching or solder ball formation
Solder Paste	ALPHA PV-300 Processed and packaged void-free to assure consistent dispensing results Reliable, non-clogging dispensing Rheology to provide continuous, high-speed dispensing (thousands of dispenses per hour)
Solder Paste	ALPHA Exactalloy Industrial Solder Preforms Preforms that deliver precise fit, controlled solder volume and flux level consistency, and extensive alloy range for rugged industrial applications Available in standard shapes and sizes including discs, rectangles, washers, sleeves and wire segments Extensive list of lead and lead-free alloys Available with or without integrated flux coating or core
Cored Wire	ALPHA Telecore HF-850 SAC305 / Sn60Pb40 Performs well with all standard pad finishes Can be used in both robotic and manual soldering processes ROL0
Cored Wire	ALPHA Telecore XL-825 SAC305 / Sn60Pb40 Best for difficult to solder surfaces Can be used in both robotic and manual soldering processes ROL1
Cored Wire	Kester 268 SAC305/K100LD Optimzed for low spatter robotic soldering Can be used for manual and automated soldering processes Zero halogen ROL0
Cored Wire	Kester 285 SAC305 Highly active for soldering difficult surfaces while retaining ROL0 class Can be used for manual and automated soldering processes ROL0
Liquid Flux	Kester 952-S Solid content at 2.0% Fast wetting and drying quickly allowing fast throughput Produce solid interconnects for high peel strength
Liquid Flux	ALPHA PV-71 Solid content at 1.65% Quick flux activation even under short soldering time and higher preheating loss Wide process window and high peel strength
Liquid Flux	Kester SF800-LR Solid content at 1.5% Extremely low residue for minimal post soldering cleaning Excellent peel strength

Low Voiding Solder Pastes Halogen Free & Zero Halogen Products

Key Requirements for Joining Materials

High activity, low residue fluxes for spray or dip applications
Fluxes compatible with popular encapsulants
Low spatter, high activity cored wires
High solder volume precision preforms

Product Type	Product Name	Low Temp	PB Free	Halogen Free	VOC Free
Solder Paste	ALPHA OM-5100 Consistent fine-feature print volume repeatability Low post reflow residue Minimizes random solder balling
Solder Paste	ALPHA OM-550 Best mechanical performance of Alpha’s low temperature solder alloys Repeatable printing down to 0.3mm/.012” pitch and 01005 passives Low contact resistant Uniform IMC No silver leaching or solder ball formation
Solder Paste	ALPHA PV-300 Processed and packaged void-free to assure consistent dispensing results Reliable, non-clogging dispensing Rheology to provide continuous, high-speed dispensing (thousands of dispenses per hour)
Solder Paste	ALPHA Exactalloy Industrial Solder Preforms Preforms that deliver precise fit, controlled solder volume and flux level consistency, and extensive alloy range for rugged industrial applications Available in standard shapes and sizes including discs, rectangles, washers, sleeves and wire segments Extensive list of lead and lead-free alloys Available with or without integrated flux coating or core
Cored Wire	ALPHA Telecore HF-850 SAC305 / Sn60Pb40 Performs well with all standard pad finishes Can be used in both robotic and manual soldering processes ROL0
Cored Wire	ALPHA Telecore XL-825 SAC305 / Sn60Pb40 Best for difficult to solder surfaces Can be used in both robotic and manual soldering processes ROL1
Cored Wire	Kester 268 SAC305/K100LD Optimzed for low spatter robotic soldering Can be used for manual and automated soldering processes Zero halogen ROL0
Cored Wire	Kester 285 SAC305 Highly active for soldering difficult surfaces while retaining ROL0 class Can be used for manual and automated soldering processes ROL0
Liquid Flux	Kester 952-S Solid content at 2.0% Fast wetting and drying quickly allowing fast throughput Produce solid interconnects for high peel strength
Liquid Flux	ALPHA PV-71 Solid content at 1.65% Quick flux activation even under short soldering time and higher preheating loss Wide process window and high peel strength
Liquid Flux	Kester SF800-LR Solid content at 1.5% Extremely low residue for minimal post soldering cleaning Excellent peel strength

Low Voiding Solder Pastes Halogen Free & Zero Halogen Products

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Module Assembly - Tabbing and Stringing

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