JPH0547442Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a novel electronic component in which a checker electrode portion is provided integrally with the end electrode of a chip-shaped electronic component.

<Prior Art> Chip-shaped electronic components are widely used as components for videos, cameras, etc. because they are small and can be mounted at high density on printed wiring boards and the like.

For example, in the chip parts shown in FIGS. 5A and 5B, a resistor layer 11 mainly made of a carbon mixture or the like is formed on one surface of a base material 10 such as ceramics by printing or baking. , with end electrodes 12, 12 fitted on both ends thereof, and mounted on the land 7 of the printed wiring board P as shown in FIG.
The parts 2 and 12 are soldered and mounted on the land as shown by 5 in the figure.

<Problem to be solved by the invention> However, when checking is performed using a checker pin 6 or the like after mounting, as shown in FIG. Since the soldering part comes into contact with an inclined or uneven soldering part as shown in the figure, the contact resistance at this part becomes large and not only does the electric signal from the checker pin 6 become inaccurate, but also the contact resistance of the soldering part becomes large. A pressing load is applied to the checker pin 6, which may cause the checker pin 6 to break or bend.

The present invention was devised in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide an electronic component with a novel configuration that allows checking of chip-shaped electronic components mounted on a printed wiring board using a checker electrode. With the goal.

<Means for Solving the Problems> The electronic component of the present invention includes a rectangular ceramic base material, a resistor formed on the upper surface or lower surface of the ceramic base material, and opposing ends of the ceramic base material. and a checker electrode extending from the end electrode to the upper surface of the ceramic base material, and the checker electrode is provided with a checker pin during post-mounting inspection. It has enough area for contact.

<Operation> The electronic component of the present invention configured as described above has the following effects:
After being mounted on a printed wiring board, by positioning the checker pin at or near the checker electrode, the checker pin can be brought into vertical contact with the surface of this electrode section or its vicinity, so that the electronic component can no longer be mounted. The situation can be grasped using accurate electrical signals.

In addition, the conventional problems of checker pins such as bending and bending are solved by forming the smooth electrode portion.

<Examples> Examples of the present invention will be described below with reference to the drawings.

FIG. 1A is a plan view showing a chip-shaped electronic component according to the present invention, FIG. Figure A is a bottom view showing still another configuration mode, Figure B is a sectional view of the same, and Figure 4 is a mode in which the chip-shaped electronic component according to the present invention is mounted on a printed wiring board and checked with a checker pin after soldering. FIG.

That is, the chip component shown in FIG. 1 has a resistor 2 formed on the upper surface of a rectangular ceramic base 1, and end electrodes 3, 3 that bridge the resistor 2 are fitted to both ends of the resistor 2. At the same time, round checker electrodes 4, 4 extending from the end electrodes 3, 3, respectively, are constructed so as to protrude from the surface of the resistor 2. The checker electrodes 4, 4 are provided for testing chip components mounted on the printed circuit board P, and have a sufficient area for the checker pin 6 to come into contact with them. As shown in FIG. 4, by bringing the checker pin 6 into contact with the checker electrodes 4, 4, it is possible to obtain the mounting status of the chip components as an electrical signal without damaging the checker pin 6 in any way.

The chip component shown in FIG. 2 includes the end electrodes 3,
This figure shows a structure in which checker electrodes 4a, 4a are extended to the resistor 2 and have substantially the same width as the electrodes 3, 3, respectively, and protrude from the 2 surface of the resistor. Since the area becomes wider, checking with the checker pin 6 becomes easier. In addition, the surface of the resistor 2 is reduced due to occupation of the checker electrodes 4a, 4a, but in this case, in order to maintain a desired resistance value, the thickness of the resistor 2 may be particularly increased or its composition changed. It is adjusted by

Figure 3 shows end electrodes 3, 3 on the back side of the chip component.
This shows an embodiment in which checker electrodes 4b, 4b are formed to have approximately the same width as that of the chip component shown in FIG. 1 and FIG. Like the chip parts shown, it can be suitably checked by the checker pin 6.

Checker electrodes 4, 4 according to the present invention described above
a and 4b are made of a conductor plated with tin, solder, or silver of the same quality as the end electrodes 3 and 3 of the chip component, and are integrally constructed with the end electrodes 3 and 3 and are fitted into the base material 1. This does not lead to an increase in the number of man-hours required for manufacturing chip parts.

Due to its configuration, the checker land can be made precise and narrow, which is suitable for the purpose of miniaturizing parts.

<Effects of the Invention> As described above, the electronic component of the present invention includes a rectangular ceramic base material, a resistor formed on the upper surface or lower surface of the ceramic base material, and opposing ends of the ceramic base material. and a checker electrode extending from the end electrode to the upper surface of the ceramic base material, the checker electrode being used as a checker pin in post-mounting inspection. Since it has a sufficient area for contact, it facilitates checking with a checker pin after being mounted on a printed wiring board, etc., and improves mounting efficiency.

Further, since the checker pin comes into vertical contact with the smooth checker electrode or its vicinity, special effects such as being able to transmit accurate signals without damaging the checker pin can be achieved.

[Brief explanation of the drawing]

FIG. 1A is a plan view showing a chip-shaped electronic component according to the present invention, FIG. Figure A is a bottom view showing still another configuration, Figure 4 is a cross-sectional view, and Figure 4 shows an embodiment in which the chip-shaped electronic component according to the present invention is mounted on a printed wiring board and checked with a checker pin after soldering. FIG. 5A is a plan view showing the configuration of a conventional chip component, FIG. 5B is a sectional view thereof, and FIG. 1, 10... Base material, 2, 11... Resistor, 3,
12... End electrode, 4, 4a, 4b... Checker electrode, 5... Solder, 6... Checker pin,
7... Land, P... Printed wiring board.

Claims (1)

[Scope of utility model registration request] a rectangular ceramic base material, a resistor formed on the top or bottom surface of the ceramic base, and an end electrode formed at opposing ends of the ceramic base and connected to the resistor; A checker electrode is provided extending from the end electrode to the upper surface of the ceramic base material, and the checker electrode has a sufficient area for contact with a checker pin during post-mounting inspection. and electronic components.