JPH0342673Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a laminated composite part, and particularly relates to the structure of a laminated composite part in which an inductor can be trimmed.

[Prior art and its problems]

With the demand for smaller and thinner electronic components, inductors and capacitors are increasingly becoming chips, and multilayer inductors are also being used in the field of inductors. In this method, ferrite magnetic materials are laminated as sheets or laminated while being printed, and a continuous conductor pattern is formed between the layers. A laminated composite component in which this and a laminated capacitor are integrally formed is also used.

When the laminated composite parts formed in this way are laminated and fired, their characteristics (inductance, capacitance) are determined, so trimming must be performed when adjusting the resonant frequency when used as an LC resonant circuit. No. Trimming is generally performed using either an inductor or a capacitor, and a common method for trimming an inductor is to form a recess in the magnetic material of the coil pattern to change the cross-sectional area of the magnetic path. but,
This method can only reduce the inductance value.

In order to increase the inductance value, there are methods such as inserting a magnetic core, but either method is disadvantageous in terms of man-hours, yield, and cost.

〔the purpose〕

The present invention aims to solve the above-mentioned problems and obtain a laminated composite component that can be trimmed to increase the inductance value and adjust characteristics such as resonance frequency.

Another object of the present invention is to obtain a laminated composite part that is easy to manufacture and can be easily trimmed.

[Means for solving problems]

The above object is achieved by forming an exposed conductor pattern on the surface of the laminated inductor of the present invention.

In other words, it is a laminated composite component in which a laminated inductor with a spiral conductor pattern connected sequentially in the lamination direction while going around between magnetic layers and a capacitor formed by a pair of opposing electrodes sandwiching a dielectric layer are stacked together. The device is characterized in that the conductor pattern has a short-circuiting conductor pattern at the end portion on the front side of the conductor pattern, and the short-circuiting conductor pattern is exposed on the surface.

Change the inductance value by cutting the exposed conductor pattern, thereby changing the LC
It adjusts the characteristics of the circuit.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a front sectional view thereof. Laminated magnetic material 10
A conductor pattern 11 extending continuously from layer to layer is formed inside, and includes a coil pattern. Both ends of the conductor pattern 11 are usually drawn out to opposite sides.

On the other hand, a pair of opposing electrodes 13 are arranged within the dielectric 12 to form a capacitor. The terminals of this capacitor and inductor are connected in series or in parallel to form an LC composite component.

Here, a short-circuiting conductor pattern 15 is formed on the uppermost layer 14 of the conductor pattern of the laminated inductor. This short-circuiting conductor pattern 15 is formed so as to cross the magnetic path in the coil pattern. In this case, the conductor pattern 14 serving as the coil pattern is covered with the magnetic layer 16;
The conductor pattern 15 to be short-circuited is not covered with the magnetic layer 16 and is exposed on the surface. This magnetic layer 16 is useful in protecting the conductor pattern 14 and forming a closed magnetic path.

Removing all or part of the exposed shorting conductor pattern 15 changes (increases) the cross-sectional area of the magnetic path in the coil, which can change (increase) the inductance value. The removal method may be a method of burning out with a laser or a method of removing by physical means.

The shape and size of the hole formed in the magnetic layer 16 to expose the conductor pattern 15 to be short-circuited can be arbitrary, but it is preferable to minimize the size depending on the shape of the conductor pattern 15.

The shape of the short-circuiting conductor pattern may be any shape as long as it traverses the inside of the coil pattern; for example, patterns such as those shown in FIGS. 3 to 5 can be considered.

〔effect〕

According to the present invention, trimming can be easily performed by simply cutting short-circuited conductor patterns, and trimming that increases inductance is also possible, making it possible to widen the adjustment range of the characteristics of the LC composite component.

Further, processing accuracy is not required as in the conventional method, and a laminated composite part that is advantageous in terms of man-hours, yield, and cost can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front sectional view thereof, and FIGS. 3, 4, and 5 are front views showing examples of short-circuiting conductor patterns. 10... Magnetic material, 11, 14, 15... Conductor pattern, 12... Dielectric material, 16... Magnetic material layer.

Claims (1)

[Scope of utility model registration request] In a laminated composite component in which a laminated inductor with a spiral conductor pattern connected sequentially in the lamination direction while going around between magnetic layers and a capacitor in which a pair of opposing electrodes is formed with a dielectric layer in between are superimposed, 1. A laminated composite component comprising a short-circuited conductor pattern at an end on the surface side of the conductor pattern, and the short-circuited conductor pattern is exposed on the surface.