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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

特徵

・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.

印刷方式

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

Applicable Surfaces

金、銀、銅

Product Specifications

SR9200

SR9870

(Under development)

SR9950

特徵

燒結溫度低

Pressure-less sintering to bare Cu surface

燒結溫度低

Medium die size

應用領域 LED、UV-LED、LD

Power semiconductor (Si、SiC)

Power semiconductor (Si、SiC)

小模具

(~1.5mm×1.5mm)

大型模具

(~10mm×10mm)

Medium Dies

(~5mm×5mm)

Applicable Surface 銀、金 銀、金、銅 銀、金

過程

Conditions

印刷方式

自動販賣機

Pin transfer process

金屬掩模印刷 自動販賣機

燒結

Atmosphere

空氣

Nitrogen or Air

空氣

燒結

Temperature (ºC)

150 275 200

Sintering Time

(分鐘)

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

特性

燒結

Shear Strength

(兆帕)

>70

(1毫米×1毫米)

>90

(2.5mm×2.5mm)

>120

(3mm×3mm)

熱的

Conductivity

(瓦/米·開)

140 300 215

Electric Resistivity

(μΩcm)

5 2 3

表中的值為代表值。規格如有更改,恕不另行通知。

應用領域

在半導體晶片上進行印刷的範例

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