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Leadfree

Heraeus offers a full line of no clean, solvent clean, and water soluble solder pastes for surface mount and semiconductor applications. Sn/Ag, SAC, Sn/Bi, Sn/Sb, and other alloys are available in melting points from 138 °C to 240 °C. These pastes are compatible with a variety of reflow methods including convection, vapor phase, and vacuum systems. Solder pastes are available in particle sizes ranging from Type 3 to Type 8 powders for standard and ultrafine printing requirements. Dispensable versions are also available for air over and positive displacement systems. These Pb Free pastes provide industry leading wetting and outstanding void performance on a variety of component terminations and surfaces. Heraeus Pb Free solders are also available in halogen free versions which meet the most demanding applications e. g. thin Au wire bonding.
Lead Free Products
Printing Solderpaste
Solderpaste, printed
Solder Pastes - Leadfree
No clean Water cleanable
Paste/Series
F169 F620 F6401) F645 F823 NC260 5126 WL449 F541
Application
Printing + + + + + + +
Dispensing + + +
Solder Paste Properties
Halogen free + + + +
J-STD-004 classification not tested L1 L02) L02) L0 M1 L0 H0 H1
Reflow in air + + + + +3) + + + +
Reflow in nitrogen + + + + + + + + +
Vapour phase + + + + + + + +
Superior wetting,
also in air
+ + + + + +
Excellent wetting on Ni,
also in air
+ + + +
Very clear flux residues + +3) + n/a n/a
Minimizes voiding on BGA's + + +
Minimizes voiding in area soldering + + +
Easy cleaning with water +

1) W640 Solder Wire available in different diameters.
2)Tested per Bellcore GR-78-Core, pass
3)In combination with SnBiAg