JPH0573930U - Ceramic composite electronic parts - Google Patents

Abstract

(57) [Abstract] [Purpose] When selecting the direction of a ceramic composite electronic component, the marking provided at a predetermined position of the component can be surely recognized by a relatively inexpensive color mark sensor. To provide. A marking part 5 provided on an upper surface of the ceramic composite electronic component 1 for direction selection has a concave or convex shape, and its main surface is a sloped surface.
With respect to the irradiation light 7 of the optical sensor 6, there is a clear difference in the amount of light received by the optical sensor light receiving portion with respect to the reflected light from the surface of the element body and the reflected light from the marking portion having an inclined surface, making it easy to identify the marking portion. It is characterized by having done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ceramic composite electronic component, and more particularly to a ceramic composite electronic component in which a marking provided for determining the position of an external connection terminal of the component is surely identified by an optical sensor.

[0002]

[Prior Art]

 As shown in the perspective view of FIG. 5, in a ceramic composite electronic component such as a laminated LC filter, a plurality of electronic elements are provided inside a rectangular ceramic body, and each electronic element, for example, a capacitor element 2 and Since the external connection terminals 4 of the inductor element 3 are led out and arranged on the peripheral surface of the element body, which terminal is used as a reference and which number terminal is used to determine which electronic element terminal is used In order to do so, marking is made near the reference terminal. The marking is recognized by identifying the marking portion 5 with an optical sensor such as an automatic inspection device or an automatic insertion machine.

The optical sensor is called a color mark sensor, which identifies by the difference in the amount of reflected light, and is relatively inexpensive and widely used in the production sector.

The operating principle is as shown in the top view of the electronic component of FIG. 6, in which the light irradiation portion 8 irradiates two spots, the marking portion 5 and the vicinity thereof, with the reflected light. The difference is calculated and the marking is recognized when the difference is larger than a predetermined level.

Therefore, the selection of the electrical characteristics of the ceramic composite electronic component and the direction when taping is performed by first recognizing the marking, then confirming where the marking is, and aligning the direction of the electronic component. Done.

[0006]

[Problems to be solved by the device]

 However, in the above conventional method, even if the color of the mark is selected, the change due to the selection of the color is small, and the slight difference between the light reflected from the surface of the ceramic body and the light reflected from the surface of the marking portion can be reliably identified. It is difficult to select the color of the marking part in consideration of the color of the element body, but the inexpensive sensor sometimes makes an erroneous determination, and there is a problem that the marking cannot be recognized.

It should be noted that although a high-performance sensor may be used, it is extremely expensive and there is a cost limitation in using it in the production department of the product.

Therefore, an object of the present invention is to make sure that a marking provided at a predetermined position of a ceramic composite electronic component can be surely recognized even by a relatively inexpensive color mark sensor in the direction selection of the ceramic composite electronic component. It is to provide a composite electronic component.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present inventor has studied the shape of the marking part in order to cause a clear difference between the marking part and the surface of the element body in the reflected light of the spot light of the optical sensor. The inventors have found that the above problems can be solved by forming the marking portion in a concave shape or a convex shape and making the main surface an inclined surface to increase the difference in the reflected light, and arrived at the present invention.

Therefore, according to the present invention, a plurality of electronic elements are internally provided in a rectangular ceramic element body, and the external connection terminals of each electronic element are led out and arranged on the peripheral surface of the element body. A ceramic composite electronic component having a marking portion for direction selection near the reference terminal among these external connection terminals on the upper surface of the lamic element body, wherein the shape of the marking element body is concave or convex. The main surface is a sloped surface, and the sloped surface is preferably coated with color ink. When the direction of the electronic component is selected by the optical sensor, the reflected light from the surface of the element body and the sloped surface With respect to the reflected light from the marked portion, the reflected light has a clear difference in the amount of light received by the optical sensor light receiving portion, thereby facilitating the identification of the marking portion. A ceramic composite electronic component is provided.

[0011]

[Action]

 To specifically exemplify the operation of the present invention, the marking portion for direction selection provided on the upper surface of the ceramic body is formed in a concave shape or a convex shape, and the main surface thereof is formed into an inclined surface, so that, for example, one of the optical sensors The spot light is reflected on the surface of the element body, and most of the light enters the light receiving part of the sensor, while the marking part that is a slope is reflected in a different direction from the incident light, and the light receiving part of the optical sensor There is a clear difference in the amount of reflected light between the marking part and the base material, for example, by preventing most of the reflected light from being received, which makes it extremely easy to recognize the marking part.

The shape of the marking portion provided on the element body is the same as that of the concave shape and the convex shape, but the same effect is obtained, but the marking portion is provided with a concave shape by providing a protrusion on the contact surface with the marking portion of the crimping die. The formation is easier in terms of process.

[0013]

Embodiment 1 FIG. 1 is a plan view (FIG. 1A) showing a marking portion formed on the upper surface of an electronic element in this embodiment, and FIG. FIG. 3B is a sectional view showing the shape and how light is reflected at the marking portion (FIG. 3B). Description will be given below with reference to these.

First, a green sheet on which a predetermined conductor pattern is printed is stacked, and at this time, a green sheet on which a marking for distinguishing terminals is printed is stacked. Next, the contact surface with the marking is crimped with a crimping die provided with a protrusion corresponding to the wedge-shaped recess shown in FIG. 1 (b). After pressure bonding, this laminated body was cut and subjected to debindering, baking, and formation of external terminals to manufacture a ceramic composite electronic component 1 (laminated LC filter). The marking paste used was a paste in which titanium oxide powder and glass were dispersed in an organic vehicle so that the display could be visually identified.

As shown in FIG. 1B, almost all of the irradiation light 7 from the optical sensor 6 is reflected by the light receiving portion on the surface of the element body without marking, whereas on the slope of the marking portion 5, As a result, the irradiation light is reflected as shown in the figure and is not received by the sensor, the difference in the amount of received light is extremely large, and the marking portion is clearly identified.

FIG. 2 is a cross-sectional view showing four kinds of slope inclination directions for the wedge-shaped marking portion 5 used in the first embodiment of the present invention, and FIGS. 2 (b), 2 (c) and 2 (d). ) And (e) show the shapes in the AA 'cross section and the BB' cross section of FIG. 9 (a), respectively, and the inclination in any direction may be adopted.

[0017]

Second Embodiment In the first embodiment, the light is emitted from directly above the element body, whereas the present embodiment is applied to the case where the light is emitted obliquely. That is, as shown in FIGS. 3 (a) and 3 (b), a crimping die having a pyramid-shaped protrusion was used, and the marking portion 5 was formed as an inverted pyramid-shaped concave portion. Therefore, the marking portion may be located at any of the four light irradiation portions 8 shown in FIG. If the angle of the top cross section of the pyramid is obtuse, the method of this embodiment can be irradiated from directly above the element body (see FIG. 3C).

Further, as shown in FIG. 3B, in this case, the amount of light received by the light receiving portion of the optical sensor is just opposite to that in the first embodiment.

[0019]

Third Embodiment While the angle of the top cross section of the pyramid-shaped recess of the second embodiment is an obtuse angle, this embodiment shown in FIG. 4 is a case where the angle of the top cross section is 90 degrees. Therefore, the method of this embodiment is effective only for light from an oblique direction.

[0020]

As described above, according to the ceramic composite electronic component of the present invention, the marking portion provided on the upper surface of the ceramic body is formed in a concave shape or a convex shape, and the main surface thereof is an inclined surface, Due to the difference in the way the spot light of the optical sensor reflects on the surface of the element and the way it is reflected on the surface of the element, it is easier to recognize the marking.Therefore, it is possible to use an inexpensive color mark sensor regardless of the color tone of the ceramic element. The direction of electronic parts can be sorted out, and the trouble of manually arranging defective recognition products, which has occurred in the past, is unnecessary. Furthermore, if color ink is applied to the marking part, the color mark sensor In addition to sorting by, it becomes easy to identify with the naked eye.

[Brief description of drawings]

FIG. 1 is a plan view (FIG. 1A) showing a marking portion formed on the top surface of an electronic element according to Embodiment 1 of the present invention and the shape of the marking portion taken along the line AA ′ in FIG. FIG. 3B is a cross-sectional view showing how to reflect light at the marking portion (FIG. 3B).

FIG. 2 is a cross-sectional view showing four types of slopes of the marking portion used in Example 1 in the direction of inclination.

FIG. 3 is a plan view of the marking portion in the shape of an inverted pyramid (FIG. 3A) and sectional views showing how light is reflected when the cross section of the pyramid has an obtuse angle (FIGS. 2B and 2C). c)).

4A and 4B are a sectional view (the same figure (b)) and a plan view (the same figure (a)) showing how light is reflected when the angle of the top cross section of the inverted pyramid-shaped marking part is 90 degrees. ..

FIG. 5 is a perspective view of a conventional laminated LC filter having a marking portion.

6 is a plan view of FIG. 5 showing a marking portion and a spot light irradiation portion on the upper surface of the element body.

[Explanation of symbols]

 1 ... electronic parts 2 ... capacitor element 3 ... inductor element 4 ... external connection terminal 5 ... marking section 6 ... light sensor 7 ... irradiation light 8 ... light irradiation area

Claims (2)

[Scope of utility model registration request] 1. A plurality of electronic elements are provided inside a rectangular ceramic element body, and external connection terminals of each electronic element are led out and arranged on the peripheral surface of the element body. A ceramic composite electronic component having a marking portion for direction selection in the vicinity of a reference terminal among external connection terminals, wherein the shape of the element body of the marking portion is formed in a concave or convex shape, The main surface is an inclined surface, and when the direction of the electronic component is selected by the optical sensor, the reflected light from the surface of the element body and the reflected light from the marking portion formed into the inclined surface are received by the optical sensor. A ceramic composite electronic component, characterized in that a clear difference is generated in the amount of light received by a portion to facilitate the identification of the marking portion. 2. The ceramic composite electronic component according to claim 1, wherein color ink is applied to the marking portion formed in the concave shape or the convex shape.