Development of Composite Fillers 

 

Made by Yeungnam University	hexagonal Boron Nitride	Aluminum Nitride	BN-AlN Composite
Primary Particle	70% <0.5 um + 30% 10 um	70% 0.5 um + 30% 2.7 um	70% AlN 0.5um+30% BN 10um
Manufacuring Process*	Aqueous BN suspension	Aqueous AlN suspension	Aqueous BN/AlN suspension
Solid Loading in Suspension	> 20 vol.%	> 31 vol.%	> 30 vol.%
Avg. Granule Size	~ 20 um	~ 20 um	~20 um
Max. Dispensable Filler Content	~ 52 wt.% (33.7 vol.%)	~ 78.4 wt.% (52.2 vol.%)	In development
Specific Gravity	1.35 g/cm3	2.17g/cm3	"
T. Conductivity (Non-sintered Porous Filler)	1.7 W/m-K	1.8 W/m-K	"
T. Conductivity (Sintered Dense Filler)	-	In development	"

*) Kor. Pat. Application 10-2024-0197846

(1-1) Spherical h-BN Fillers

 

 

(1-2) Gap-filler TIM using the above BN fillers

 

Note that the central spherical particle above in the gap-filler TIM is the prepared BN filler particle

 

(2) Spherical AlN Fillers

 

 

 

Made by Yeungnam University	BN/MgO	AlN/MgO	Silicon Carbide
Primary Particle	30% BN 10 um 70% MgO 0.5um	30% AlN 2.7 um 70% MgO 0.5 um	~ 70% 2.4 um + 30% 0.5 um
Manufacuring Process*	Aq. BN/MgO suspension	Aq. AlN/MgO suspension	Aq. SiC suspension
Solid Loading in Suspension	> 20 vol.%	> 31 vol.%	> 20 vol.%
Avg. Granule Size	~ 20 um	~ 20 um	~20 um
Max. Dispensable Filler Content	-	-	-
Specific Gravity	-	-	-
T. Conductivity (Non-sintered Porous Filler)	-	-	-
T. Conductivity (Sintered Dense Filler)	-	-	-

*) Kor. Pat. Application 10-2024-0197846

(3) Spherical SiC Fillers