Produits Produits de gestion thermique

FlowMetal™ Nano silver paste for sintering

Nano silver paste for die attach process which can be bonded at low temperatures

Typical bonding materials like solder, re-melts when exposed to high temperature.

Thus, typical solder is unusable for power semiconductors such as SiC and GaN which are used in high temperature environment.
FlowMetal™ nano silver paste is designed as a new bonding material to solve the problem.

Although the sintered body of silver nanoparticles is dense with small number of pores in the structure, it retains low electrical resistance and high thermal conductivity almost as the same as silver.

FlowMetal™ Nano silver paste for sintering

Caractéristiques

・A bonding material designed using our exclusive silver nanoparticles.
FlowMetal™ nano silver paste is manufactured using silver nanoparticles synthesized by our company.
Specifications with higher silver particle concentration (85-97wt%) are available.
The product is lead-free.

・Low bonding temperature with excellent heat resistance, electrical conductivity, thermal conductivity.
Production technology of low-temperature sintering type silver nanoparticle enables sinter bonding of the nano silver paste at low temperatures.
It is known that silver nanoparticles sinter at low temperature due to the size effect, and the melting point of the sintered silver is similar to that of bulk silver (962℃).

・Pressure-less sintering
 In spite of being pressure-less, the low-temperature sintering process provides high bonding strength through diffusion reactions between the nanoparticles and the substrate metal.
Pressure-free sintering may not be suitable depending on the conditions. There is also specifications for sintering with pressure.

Méthode d'impression

Dispenser, metal mask (stencil) printing, or pin transfer process are available.

Applicable Surfaces

Or, Argent, Cuivre

Product Specifications

SR9200

SR9870

(Under development)

SR9950

Caractéristiques

Basse température de frittage

Pressure-less sintering to bare Cu surface

Basse température de frittage

Medium die size

Applications LED, LED UV, LD

Power semiconductor (Si、SiC)

Power semiconductor (Si、SiC)

Petites matrices

(~1,5 mm × 1,5 mm)

Grandes matrices

(~10mm×10mm)

Medium Dies

(~5 mm × 5 mm)

Applicable Surface Ag, Au Ag, Au, Cu Ag, Au

Processus

Conditions

Méthode d'impression

Distributeur

Pin transfer process

Impression de masques métalliques Distributeur

Frittage

Atmosphere

Air

Nitrogen or Air

Air

Frittage

Temperature (ºC)

150 275 200

Sintering Time

(min)

120 30 60
Sintering Pressure Pressure-less Pressure-less Pressure-less

Propriétés

après

Frittage

Shear Strength

(MPa)

>70

(1 mm × 1 mm)

>90

(2,5 mm × 2,5 mm)

>120

(3 mm × 3 mm)

Thermique

Conductivity

(W/mK)

140 300 215

Electric Resistivity

(μΩcm)

5 2 3

Les valeurs du tableau sont des valeurs représentatives. Les spécifications sont sujettes à modification sans préavis.

Applications

Exemple d'impression sur une puce semi-conductrice

Site spécial « Gestion thermique » de Bando Chemical

« Gestion thermique » de Bando Chemical
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