KR0167012B1 - Inductance device for chip-type noise filter - Google Patents

Abstract

The present invention relates to an inductance element used in the manufacture of a noise filter, which consists of horizontal segments of length L1 and vertical segments of length L2 so as to extend in a zigzag form on a plane. And each of the horizontal segments except the last segment is connected at both ends by the vertical segments so that all the horizontal segments are parallel at equal intervals, and at least one of the first and the last horizontal segments is provided with a leg portion. It is configured to extend so that inductive coupling between each segment does not occur.

Description

Inductance element for chip noise filter manufacturing

1 is a view showing a lead frame made of an inductance element for manufacturing an L-shaped noise filter of a chip shape according to the present invention.

2 is an enlarged view of a portion of FIG. 1 enlarged.

FIG. 3 (a) shows an inductance element of one of the lead frames of FIG.

3 (b) is a diagram showing a portion to which a chip capacitor is attached.

FIG. 4 is a diagram showing a circuit diagram when the chip capacitor is attached to the chip capacitor attaching part in FIG. 3 (b).

5 is a diagram showing another form of inductance element for producing a chip-shaped T-type noise filter according to the present invention.

FIG. 6 is a circuit diagram when the chip capacitor is attached to the chip capacitor attaching part in FIG.

* Explanation of symbols for main parts of the drawings

15: leg portion 21a: first inductance element

21b: second inductance element 25a: first leg portion

25b: second inductance element 29: connection segment

101, 103, 105, 107, 109, 111, 113, 115, 117, 119: horizontal segment

131, 133, 135, 137, 139, 141, 143, 145, 147: vertical segment

151: attachment portion 271; Chip Capacitor Attachment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductance element for manufacturing a noise filter in the form of a chip used to suppress radiation of disturbing electromagnetic waves from an electronic device, and a lead frame composed of the elements.

Recently, as the use of computers, especially home computers, has become commonplace, a large amount of high frequency electromagnetic signals are generated to disturb the operation of other electronic devices (hereinafter, referred to as disturbing electromagnetic waves). Therefore, many countries have regulations requiring attenuation at the source of the signal in order to reduce the output level of such disturbing electromagnetic signals.

Methods or devices for reducing the signal output of such disturbing electromagnetic waves are known in the literature, one of which is the use of noise filters, which are inserted into a circuit board (PCB) independently of other electronic components or It is placed on the circuit board. The noise filter is manufactured in the form of a chip in order to facilitate the operation of being inserted into or placed on a circuit board.

In this chip type noise filter, a ferrite core or a coil is used as an inductance element.

However, the noise filter having the inductance element of this type has a disadvantage in that the temperature characteristic is not only poor, and the high frequency and ultra high frequency of 200 MHz to 2 GHz do not sufficiently function as an inductance and thus, sufficient blocking characteristics as a noise filter cannot be obtained. Moreover, there is a need for a noise filter having excellent cutoff characteristic of a specific frequency required for a device used in high frequency to ultra high frequency such as input / output video signal line, clock frequency line, RF signal line and portable car phone.

Accordingly, an object of the present invention is to provide an inductance element used to manufacture a noise filter having a high Q value even at high and ultra high frequency bands of 200 MHz to 2 GHz.

The inductance device according to the present invention for achieving this object is composed of horizontal segments of length L1 and vertical segments of length L2 so as to extend in a zigzag form on a plane to each other long, the first horizontal segment and the last horizontal Each of the horizontal segments except the segment is connected at both ends by the vertical segments so that all the horizontal segments are parallel at equal intervals, and a leg portion extends from at least one of the first and last horizontal segments. It is. In particular, the leg portion is provided with a chip capacitor attaching portion, so that the chip capacitor is attached to this portion, so that the L-type inductance filter can be efficiently manufactured.

In addition, another type of inductance element according to the present invention can efficiently configure a T-type filter. The inductance elements for this purpose are horizontal segments having a length of L1 and lengths so as to be connected to each other in a zigzag form on a plane. It consists of vertical segments of L2, wherein each of the horizontal segments except the first horizontal segment and the last horizontal segment has both ends connected by the vertical segments so that all the horizontal segments are parallel at equal intervals. A first inductance element extending from the horizontal segment, a second inductance element having the same shape as the first inductance element, a connecting segment connecting the first inductance element and the second inductance element, and The leg part in the direction of the leg part from a connecting segment It consists of the 3rd leg part extended in parallel and in which the chip capacitor attachment part was formed, A chip capacitor attachment part is formed in this 3rd leg part, and a chip capacitor can be attached to this part.

Hereinafter, an inductance element according to the present invention will be described with reference to the drawings.

FIG. 1 is a view showing a lead frame made of an inductance element for manufacturing a noise filter in the form of a chip according to the present invention, FIG. 2 is an enlarged view in which part of FIG. 1 is enlarged, and FIG. 3 (a) is one of the lead frames in FIG. FIG. 3 (b) is a view showing a portion to which a chip capacitor is attached. Referring first to FIG. 3 (a), the inductance elements may be long in a zigzag form in a zigzag form. Horizontal segments 101, 103, 105, 107, 109, 111, 113, 115, 117, 119 of L1 and vertical segments 131, 133, 135, 137, 139, 141, 143, of length L2 145, 147, wherein each of the horizontal segments except the first horizontal segment 101 and the last horizontal segment 119 is connected at both ends by the vertical segments so that all the horizontal segments are parallel at equal intervals. And There after the last horizontal segment 119 extends a leg portion 15, the leg portion 15 has a second 3 (b), as shown Figure by a broken line portion of the chip capacitor mounting portion 151 is formed.

In this type of inductance element, when the chip capacitor is attached to the chip capacitor attachment portion 151 of the leg portion 15, an L-type filter as shown in FIG.

Therefore, this type shows a high Q value because inductive coupling between segments does not occur toward the high frequency region, and the workability of the filter is excellent compared to the use of a coil.

FIG. 5, which shows another embodiment according to the present invention, shows another form of inductance element for fabricating a chip-shaped T-shaped noise filter according to the present invention, and FIG. It shows a circuit diagram when the chip capacitor is attached to the chip capacitor attachment part.

The first inductance elements 21a are horizontal segments 201a, 203a, 205a, 207a, 209a, 211a, 213a, 215a, 217a, 219a, and 221a of length L1 so as to be elongated with each other in a plane to form a zigzag shape. It consists of vertical segments 231a, 233a, 235a, 237a, 239a, 214a, 243a, 245a, 247a, and 249a of length L2, except for the first horizontal segment 201a and the last horizontal segment 219a. Each of the segments is connected at both ends by vertical segments 213a, 233a, 235a, 237a, 239a, 214a, 243a, 245a, 247a, and 249a so that all the horizontal segments are parallel at equal intervals.

On the other hand, the first leg portion 25a extends from the first horizontal segment 201a of the first inductance element 21a.

The second inductance element 21b is a horizontal segment 201b, 203b, 205b, 207b, 209b, 211b, 213b, 215b, having a length L1 such that the first inductance element 21b is elongated in a plane to form a zigzag shape. 217b, 219b, 221b, and vertical segments 231b, 233b, 235b, 237b, 239b, 214b, 243b, 245b, 247b, and 249b of length L2, the first horizontal segment 201b and the first Each of the horizontal segments except the later horizontal segment 219b has both ends connected by vertical segments 231b, 233b, 235b, 237b, 239b, 214b, 243b, 245b, 247b, and 249b so that all of the horizontal segments are equidistant. Parallel to each other.

On the other hand, the second leg portion 25b also extends from the first horizontal segment element 201b of the second inductance element 21b.

The first inductance element 21a and the second inductance element 21b are connected by the connecting segment 29, and the third leg portion 27 on which the chip capacitor attaching portion 271 is formed is connected from the connecting segment 29. It has been extended.

In this type of inductance element, when the chip capacitor is attached to the chip capacitor attachment portion 271 of the third leg portion 27, a T-type filter as shown in FIG.

[Production example]

The inductance element used to make the chip-shaped noise filter is made of brass. The thickness R is 0.1mm≤R≤0.3mm, the length of the vertical segment L2 is 0.2≤L2≤0.63mm, the length of the horizontal segment L1. Has 1mm ≦ L1 ≦ 2.2mm in order to reduce the floating capacity and the insulation resistance by the mold. The inductance element is manufactured by etching brass, alloy42 alloy or phosphor bronze.

Claims (4)

It consists of horizontal segments of length L1 and vertical segments of length L2 so as to extend in a zigzag shape in a plane to each other, and each of the horizontal segments except the first horizontal segment and the last horizontal segment has both ends thereof. An inductance element for manufacturing a chip-shaped noise filter connected by a vertical segment, wherein all the horizontal segments are parallel at equal intervals, and a leg portion extends from at least one of the first and last horizontal segments. The inductance device for manufacturing a noise filter of a chip type according to claim 1, wherein a chip capacitor attaching part is formed in the leg part. The horizontal segments of length L1 and vertical segments of length L2 are formed so as to extend in a zigzag shape in a plane to each other, and each of the horizontal segments except the first horizontal segment and the last horizontal segment has both ends of the vertical segments. The horizontal segments connected by a segment are parallel to each other at equal intervals, and a first inductance element having a leg portion extending from the first horizontal segment and a second inductance element having the same shape as the first inductance element. And a chip segment including a connecting segment connecting the first inductance element and the second inductance element, and a third leg portion extending in parallel with the leg portion in the direction of the leg portion from the connecting segment and having a chip capacitor attachment portion formed thereon. Inductance element for noise filter manufacture. The inductance element for manufacturing a noise filter of a chip type according to claim 3, wherein the third leg portion is provided with a chip capacitor attachment portion.