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Solder Preforms
SOLDER PREFORMS
Flux-Coated Preforms-Flux-Coated Preforms

Under the premise of strictly controlling the dimensional tolerance and ensuring the consistency of the solder volume, the minimum thickness is 0.01mm and the minimum processing size is 0.02*0.02mm

Peculiarity

·? Of all solders, gold-based solders have the greatest tensile strength

·? Melting point 280℃, high melting point can be compatible with subsequent reflux process

·? Good wettability, corrosion resistance, oxidation resistance

·? High strength, good stability, more reliable, good fatigue resistance

·? Excellent electrical, thermal and heat dissipation performance

·? Excellent thermal fatigue resistance

·? Lead-free, in accordance with the RoHS (" Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Directive ") specifications

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? Description

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? Au80Sn20, eutectic point temperature is 280℃. In order to meet the needs of different scenarios, various shapes and sizes of preformed solder can be made. Good thermal fatigue properties and high strength properties at high temperatures are suitable for applications where high temperature strength and thermal fatigue resistance are required. It is also used where high tensile strength and corrosion resistance are required, and the high melting point is compatible with subsequent reflux processes.

? The Au80Sn20 eutectic filler metal can be used for solder solder in package welding, avoiding the contamination and corrosion of semiconductor chips caused by the use of flux. It is mainly used in optoelectronic packaging, high-power electronic device circuit airtight packaging and chip packaging.

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? Solder Composition & Properties

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· Solder Composition

Element Wt%
Gold(Au) Margin
Tin(Sn) 20±0.5

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· Physical Property

Product Name

Melting Point / ° C

Solid/Liquid phase

Density

g/cm3

Electrical Resistivity

μΩ·m

Thermal Conductivity

W/m·K

Thermal Expansion

10-6/℃?

Tensile Strength

Mpa

Au80Sn20 280 14.52 0.224 57 16 276

?

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