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  • Name: FaraBead® Gold Particles
  • Id: CA001

FaraBead® Electrically Conductive Au Particles

Nanomicro Tech provides high quality FaraBead® gold-plated particles for microelectronic packaging in electronics manufacturing.  With increasing screen resolution and hardware complexity in liquid-crystal displays (LCD), the input/output (I/O) density in integrated circuits increases while the size and pitch of the interconnection bumps are becoming very small.   FaraBead® Au particles are electrically conductive and typically dispersed in a binder to form anisotropic conductive adhesive (ACA) materials such as anisotropic conductive film (ACF) or anisotropic conductive paste (ACP) employed in the connection of microelectrodes.  FaraBead® Au conductive particles have outstanding size uniformity, high conductivity, appropriate elasticity and strong adhesion between the metal layer and the resin core. Designed specifically for vertical connection of fine-pitch electrodes, FaraBead® Au conductive particles are used, for example, in the interconnect between the two glass panels in the fabrication of LCD cells.   

 

Characteristics

Monodisperse resin particles as core and metallic gold as shell

Broad size selection: 3.0 µm − 10.0 µm (in 0.1 µm increments)

Uniform in size and shape, coefficient of variation (CV) 3.5%

Good dispersity, no overlaps or aggregates

Suitable hardness for high conduction reliability

Low resistance, high stability under heat and humidity

Optical and SEM micrographs of FaraBead® Au particles

Farabead® Au

Product

Diameter

Increment

CV

K at 10% deformation*

Metal thickness

Metal content

Application

µm

µm

kgf / mm2

nm

%

GD

7.00–10.00

0.25

3.5%

450

100–150

25–35

LCD 边框

3.00–6.75

0.25

3.5%

500

100–150

30–40

GDL

7.00–10.00

0.25

3.5%

250

100–150

25–35

ACFACP

3.00–6.75

0.25

3.5%

300

100–150

30–40

* The K value at 10% deformation is defined by the following equation:

wherein F and S represent a load value (kgf) and a compression displacement (mm) at 10% compression deformation of the particle, respectively, and R represents a radius (mm) of the particle.

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