JP2003224216A - Stacked electronic chip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stacked electronic chip in which the efficiency of securing the direction of products can be enhanced by preventing detrimental judgment errors in deciding the chip direction. <P>SOLUTION: Upper and lower surfaces [iii] and [iv] of a chip 11 constituting a stacked electronic chip are applied, respectively, with a first marking MK1 and a second marking MK2 of difference shape with a color different definitely from that of the first and second side faces [i] and [ii] of the chip body 11. The first marking MK1 occupies a part of the upper surface [iii] with a smaller area than that of the upper surface [iii] and is applied to a position shifted to the rear surface [vi] side of the upper surface [iii]. On the other hand, the second marking MK2 is applied to cover the entire surface of the lower surface [iv]. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preventing an erroneous determination of the orientation (direction) of a laminated chip type electronic component, and more particularly to a form of marking applied to the laminated chip type electronic component.

[0002]

2. Description of the Related Art In recent years, the frequency of signals handled by electronic equipment has become higher, and along with this, the miniaturization of electronic parts has made further progress. For example, inductors, capacitors, and their applied elements have been commercialized with an extremely small chip size by adopting the form of laminated electronic components. FIG. 3 shows an example of a laminated chip type electronic component in a semi-finished product state. In FIG. 3, reference numeral 21 denotes a chip body, which is made up of a predetermined number of laminated green sheets, in which circuit elements having predetermined electric characteristics are equivalently formed by conductive patterns on the green sheets.

Electrodes 22 to 24 are provided on the first side surface [i] of the chip body 21 and the second side surface [ii].
Electrodes 25 and 26 are provided in each. A marking MK is provided on the upper surface [iii] of the chip body 21. Here, the marking MK has an upper surface [ii
It occupies a part of the upper surface [iii] of the i] excluding the front surface [v] side and is provided at a position unevenly distributed on the rear surface [vi] side of the upper surface [iii]. In other words, the sheet is exposed on the front surface [v] side of the upper surface [iii], and the marking MK is provided on the rear surface [vi] side of the upper surface [iii]. In the marking MK having such a form, the vertical direction of the product can be recognized depending on whether or not the marking MK is present on the surface, and the front-back or left-right direction of the product is determined depending on the positional relationship between the marking MK on the surface and the exposed portion of the sheet. Can be recognized.

The laminated chip-type electronic component in the semi-finished product state shown in FIG. 3 is completed after several post-processes.
Officially commercialized. In the subsequent step, for example, a step of adhering electrode metal to the surfaces of the electrodes 22 to 26,
An inspection process for inspecting the electrical characteristic value of the completed product is included. In this bonding process and inspection process, the chip body 21
The sides [i] and [ii] of are subject to processing. In order to surely process the side surfaces [i] and [ii] in each process, take measures such as adjusting the attitude of the chip body 21 and at least aligning the chip body 21 vertically or horizontally. I need to put it.

[0005]

In a manufacturing line for a general-purpose multilayer chip type electronic component which is currently used, a predetermined portion (referred to as a judgment area) on one surface of the chip body 21 is photographed from a certain direction. The state in the determination area, such as the presence or absence of the marking MK, is determined by image processing, and the orientation of the chip body 21 is aligned based on the determination result. However, when the directions of the chip body 21 in which the respective surfaces [i] to [iv] are as shown in FIG. 3 are aligned by using the image processing as described above, there are the following problems.

When the first side surface [i], the second side surface [ii], the upper surface [iii] and the lower surface [iv] of the chip body 21 as shown in FIG. 3 are photographed, the determination area D on each surface is obtained.
The relationship between F, the marking MK, and the electrodes 22 to 26 is as shown in FIG. Here, the second side surface [ii] and the lower surface [i]
Comparing v], there is no characteristic part that can identify the shooting surface in the determination area DF for both surfaces. Therefore, if an alternative decision is made by image processing, the second aspect [i
In some cases, i] may be erroneously determined as the lower surface [iv] or the lower surface [iv] may be the side surface [ii].

Further, in the determination area DF of the first side surface [i], the electrode 23 is present as a characteristic portion for identifying what the photographing surface is. However, the electrode 23 is generally silver, and there may be no difference in contrast between the electrode 23 and other portions depending on the angle of the chip body 21 at the time of photographing and the amount of light. Then, in this case, the presence of the electrode 23 cannot be recognized by the image processing, and the state is the same as that where there is no characteristic portion that can identify what the photographing surface is in the determination region DF, and the first side face [i] May be erroneously determined to be the second side surface [ii] or the lower surface [iv].

A disadvantage of these erroneous determinations is that the first side surface [i] and the second side surface [ii] facing each other are the surfaces to be processed, but the lower surface [iv] is not. Depending on the configuration and processing contents of the manufacturing equipment and inspection equipment,
In many cases, the product may face in the opposite direction of 180 degrees as long as the processing jig, the probe, etc. come into contact with the surface to be processed. In such cases, the first
There is no real harm even if there is an erroneous determination between the side surface [i] and the second side surface [ii], but between the lower surface [iv] and the first side surface [i], or the lower surface [iv] and the second side surface [ii]. Misjudgment between aspects [ii] of [1] is extremely harmful.

Therefore, in the image processing, the determination area DF
If there was no feature in the product that could identify what the shooting surface was, the product had to be redone from the beginning, and the work was inefficient. Therefore, it is an object of the present invention to provide a laminated chip type electronic component that can prevent harmful misjudgment of the orientation of the chip body, thereby improving the efficiency of the work of aligning the orientation of the products.

[0010]

According to the present invention for solving the above-mentioned problems, an element that exhibits predetermined electric characteristics is formed on the inner side, and electrodes are formed on the first and second outer surfaces, respectively. In a laminated chip type electronic component, which is provided and whose internal element is electrically connected to an external circuit through its electrode, first and second different shapes are respectively formed on the outer third and fourth surfaces facing each other. It is characterized by giving the marking.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION First and second markings of different shapes are provided on the upper and lower surfaces of a chip body which constitutes a laminated chip type electronic component with a coloring which is clearly different from the left and right side surfaces of the chip body. Give. Specifically, the first marking is formed so that it has a smaller area than the upper surface, occupies a part of the upper surface, and is present at a position unevenly distributed in one direction of the upper surface.
On the other hand, the second marking is applied so as to cover the entire lower surface.

[0012]

EXAMPLE FIG. 1 shows an example of a laminated chip type electronic component (semi-finished product state) according to the present invention, in which misjudgment of the orientation of the chip body, which is harmful, is prevented. In FIG. 1, electrodes 12 to 14 are provided on the first side surface [i] of the chip body 11, and electrodes 15 and 16 are provided on the second side surface [ii]. A marking MK1 is formed on the upper surface [iii] of the chip body 11, and a marking MK2 having a different shape from the marking MK1 is formed on the lower surface [iv].
Each of them has a distinctly different coloring from the left and right sides.

Here, the marking MK1 occupies a part of the upper surface [iii] except the front surface [v] side of the upper surface [iii] and is unevenly distributed on the rear surface [vi] side of the upper surface [iii] as in the conventional case. It is provided in the position. On the other hand, marking MK
2 is a bottom surface [i] so that it can be distinguished from the marking MK1.
v] It is provided over the entire surface. Thereby, the vertical direction of the product can be recognized depending on whether the marking is applied to only a part of the surface or the entire surface. Further, the front-back or left-right direction of the product can be recognized based on the positional relationship between the marking MK1 on the surface and the exposed portion of the sheet.

When the first side surface [i], the second side surface [ii], the upper surface [iii] and the lower surface [iv] of the chip body 11 as shown in FIG. 1 are photographed, the respective surfaces [i] to [iv]. ], The relationship between the determination region DF, the markings MK1 and MK2, and the electrodes 12 to 16 is as shown in FIG. As can be seen from FIG. 2, it is only the second side face [ii] that there is no characteristic part in the determination area DF that can identify the shooting surface, and the other three surfaces have characteristic parts. Will exist.

First, the first side face [i] is changed to the second side face [i] by adjusting the angle of the chip body 11 and the amount of light at the time of photographing.
It has been described that there is a possibility that it will be erroneously determined as i]. In the laminated chip type electronic component in which each surface of the chip body 11 is as shown in FIG.
Due to the position shift of 1, the upper surface [iii] becomes the lower surface [iv]
There is also a possibility of being erroneously determined. But side [i],
Misjudgment cannot occur between [ii] and upper and lower surfaces [iii] and [iv], and harmful misjudgment of the orientation of the chip body 11 is prevented.

[0016]

As described above, the laminated chip type electronic component according to the present invention has a coloring that is distinctly different from both side surfaces of the chip body on the upper and lower surfaces of the chip body for forming the laminated chip type electronic component. The first with different shapes
And a second marking is applied. Specifically, the first marking has an area smaller than that of the upper surface and is provided at a position unevenly distributed in one direction on the upper surface, and the second marking is provided on the entire surface of the lower surface. According to the present invention as described above, erroneous determination cannot occur between the surface to be processed (side surface in the embodiment) and the surface not to be processed (upper and lower surfaces in the embodiment), which is harmful to the multilayer chip electronic component. It is possible to prevent misjudgment of orientation. As a result, it is possible to provide a laminated chip type electronic component capable of improving the efficiency of work for aligning the orientation of products.

[Brief description of drawings]

FIG. 1 is a perspective view of a laminated chip electronic component (semi-finished product state) according to the present invention.

FIG. 2 is a diagram showing a state of each surface of the multilayer chip electronic component shown in FIG. 1 and a determination region for image processing.

[FIG. 3] Conventional multilayer chip type electronic component (semi-finished product state)
The perspective view of an example.

FIG. 4 is a diagram showing a state of each surface of the multilayer chip electronic component shown in FIG. 3 and a determination region for image processing.

[Explanation of symbols]

11: Chip body 12 to 16: Electrode DF:
Judgment area MK1: First marking MK
2: Second marking [i]: First side surface (first
Surface) [ii]: second side surface (second surface)
[Iii]: upper surface (third surface) [iv]: lower surface (fourth surface)

Claims (2)

[Claims] 1. An element that exhibits predetermined electrical characteristics is formed on the inside, electrodes are provided on the outside first and second surfaces, respectively, and the internal element is connected to an external circuit via the electrode. A laminated chip type electronic component electrically connected, characterized in that first and second markings having different shapes are provided on the third and fourth outer facing surfaces, respectively. Mold electronic components. 2. The first marking occupies a part of the third surface and is provided at a position unevenly distributed in one direction of the third surface, and the second marking is provided on the fourth surface. The multilayer chip-type electronic component according to claim 1, wherein the multilayer chip-type electronic component is provided on the entire surface of the.