Design and Performance of Ni-Cu-Zn Ferrite Film for Inductor

doi:10.3724/SP.J.1077.2012.00375

Abstract

Abstract:

Ni-Cu-Zn ferrite inductor film was fabricated by screen print technology, and its performances were investigated. XRD results suggest that the as-prepared thin films exhibit the same crystalline structure. The results show that after introducing of ferrite film, the inductance increases by 30%, the quality factor is improved, and the resonance frequency decrease. Ferrite inductor thin films annealed at 400℃ exhibit an optimum performance with high quality at 50 MHz, inductance increased by 27%, the quality factor increased by 39%.

Key words: ferrite film, inductance, quality factor, screen printing

CLC Number:

TM277

FAN Yue-Nong, FENG Ze-Kun, CHEN Zhong-Yan, GONG Rong-Zhou. Design and Performance of Ni-Cu-Zn Ferrite Film for Inductor[J]. Journal of Inorganic Materials, 2012, 27(4): 375-378.

Figures/Tables 10

Fig. 1 Preparation process of ferrite powder

Fig. 2 A representative graph of inductor prepared from ferrite thin films

Table 1 Size parameters of air core inductor

Parameter	W/μm	S/μm	R/mm	n	d /μm
Air core inductor(L₀)	250	250	4.5	3	3

Table 2 Post-treatment of ferrite inductor film

T/℃	100	0-400	400	400-910	910
L1/min	240	-	-	-	-
L2/min	240	200	600	-	-
L3/min	240	200	360	160	10

Fig. 3 SEM images of ferrite film sample f3

Fig. 4 XRD patterns of ferrite films

Fig. 5 Ferromagnetic hysteresis loops of different ferrite films

Table 3 Magnetic property of different ferrite films

Magnetic property	H_c/(A·m^-1)	M_s/T	M_r/T
f 1	2800	0.3490	0.0464
f 2	2400	0.2607	0.0285
f 3	2080	0.3637	0.0732

Fig. 6 Equivalent circuit model for performance analysis of ferrite thin film inductor

Fig. 7 Performance of different ferrite film inductors

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