Producing method for laminated flexible magnetic member, and flexible magnetic sheet, thermal treating method for laminated flexible magnetic member
A manufacturing method and soft magnetic technology, applied in layered product processing, inductor/transformer/magnet manufacturing, inorganic material magnetism, etc., can solve the problems of low magnetic permeability and difficult characteristics, and achieve the effect of improving radiation efficiency and reducing SAR
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no. 1 Embodiment
[0127] A PET film with a thickness of 13 μm was prepared, and a Ni film with a thickness of 0.014 μm was formed on the film (one side) by vacuum evaporation. At this time, as the PET film, a belt-shaped film conveyed from rolls was used. After vapor-depositing Ni, a soft magnetic alloy 81% by weight Ni-19% by weight alloy (permalloy) film was formed on the Ni film using the plating solution shown below to obtain a soft magnetic sheet 1. In addition, the conditions of the electroplating solution are: bath temperature 35-55° C., pH 2.0-3.0. And, coating thickness up to 0.15μm at 2A / dm 2 electrolytic plating at a current density. In addition, in order to prevent defects in the plating film and reduce the surface tension of the plating solution, a suitable amount of surfactant is added.
[0128] Drug name Chemical formula Liquid composition (g / l)
[0129] Nickel Sulfate Hexahydrate NiSO 4 ·6H 2 O 150~450
[0130] Nickel hydrochloride hexahydrate NiCl 2 ·6H 2 O 15~45
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no. 2 Embodiment
[0142] 1T obtained by the same process as in the first example was pressurized at various pressures of 184, 461, 922, and 1843 MPa by a press at a heat treatment temperature of 85°C. The relationship between complex magnetic permeability and frequency was confirmed for 1T that was press-treated under various pressures, 1T that was not subjected to heat treatment and press treatment, and sheet 1T that was not subjected to press treatment alone. In addition, the measurement apparatus, conditions, etc. are the same as those of the first embodiment.
[0143] The results are shown in Figure 15 , Figure 16 ,as well as Figure 17 .
[0144] as these Figure 15 , Figure 16 as well as Figure 17As shown, it can be seen that the complex magnetic permeability changes by changing the pressure treatment conditions. Details can be known, such as Figure 17 As shown in (a), when the pressure is increased, μ' extends to the high frequency side, and as Figure 17 As shown in (b), w...
no. 3 Embodiment
[0147] The time of heat treatment was changed, and 1T obtained by the same procedure as in the first example was evaluated. The heat treatment temperature was 85° C., and the treatment time (retention time) was 10, 30, 60, and 300 seconds. For these sheets 1T, the values of µ' in the P direction and R direction at a frequency of 10 MHz were measured.
[0148] The results are shown in Figure 18 .
[0149] as it should Figure 18 As shown, by setting the heat treatment time at 10 seconds or more, µ' in the P direction is dramatically increased. Then, μ' tends to increase as the heat treatment decreases. Furthermore, μ' reaches the maximum when the heat treatment time is 60 seconds. Therefore, it can be seen that the heat treatment time is preferably at least 60 seconds in order to maximize the increase of μ'.
[0150] In addition, in the perpendicular R direction, a tendency opposite to that of the P direction is shown. That is, when the heat treatment time is 10 second...
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