A kind of ltcf device with air cavity and its manufacturing method
An air cavity and device technology, which is applied in the manufacture of inductors with magnetic cores, electrical components, inductors/transformers/magnets, etc., can solve problems such as deformation and device cracking, avoid cracking and deformation, improve anti-saturation performance, The effect of maintaining the integrity of the appearance and airtightness
Active Publication Date: 2021-10-08
SOUTHWEST INST OF APPLIED MAGNETICS
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Problems solved by technology
Dielectric materials must be developed to match ferrite materials with many labels, and because ferrite is a heterogeneous material with the device substrate, multi-layer dielectric materials are likely to cause cracking and deformation defects in devices after isostatic pressing or sintering
Method used
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[0023] see Figure 1-2 , a LTCF device with an air cavity, comprising a base material 1 and an air cavity 2, the air cavity 2 is located inside the LTCF device, and the air cavity 2 has no air communication with the outside world, the Metallized through holes 5 and metallized lines 6 are arranged around the three-dimensional space of the air cavity 2 .
[0024] The preparation method of above-mentioned device, comprises the following steps:
[0025] (1) Pulping and casting: fully mix ferrite powder with various organic substances to obtain a mixture, use a casting machine to cast the mixture evenly on the PET film, and form a ferrite green tape after drying , cutting the green ceramic tape to form ferrite green ceramic sheets;
[0026] (2) Punching: Use a punching machine to make through holes on the ferrite green ceramic sheet, including circuit connection holes, layer number marks, and alignment mark holes;
[0027] (3) Hole filling: Fill the metal paste into the circuit ...
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Abstract
The invention discloses an LTCF device with an air cavity and a manufacturing method thereof, and belongs to the technical field of LTCF devices. The air cavity is located inside the LTCF device, and the air cavity is not connected to the outside world. Metallized through-holes and metallized circuits are arranged around the three-dimensional space of the air cavity, and the preparation method includes making a chin block and a chin block, making the air cavity on the chin block, and adhering the chin block and the chin block The junction is fixed; the invention provides a solution for improving the anti-saturation performance of the device by making an internal air cavity in the LTCF device and adding a high-efficiency air gap structure in the LTCF device.
Description
technical field [0001] The invention relates to the technical field of LTCF devices, in particular to an LTCF device with an air cavity and a manufacturing method thereof. Background technique [0002] Compared with traditional magnetic devices, LTCF (ie, low temperature co-fired ferrite) magnetic devices have significant advantages of small size and light weight. As the size of the magnetic device becomes smaller, the anti-saturation performance of the device decreases significantly. Traditional magnetic devices usually use an air gap on the magnetic ring to improve the anti-saturation performance of the device, but LTCF magnetic devices are multi-layer chip structures without the existence of magnetic rings, so traditional processes cannot be used to improve performance. [0003] At present, the commonly used method to improve the anti-saturation performance of LTCF is to print low-permeability dielectric materials on green ceramic sheets. Usually, the number of layers of...
Claims
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IPC IPC(8): H01F17/04H01F37/00H01F41/00
CPCH01F17/04H01F37/00H01F41/00
Inventor 王泽兴陈轲田小军刘兴罗治涛
Owner SOUTHWEST INST OF APPLIED MAGNETICS