JP2633721B2 - Network type electronic components for surface mounting - Google Patents

Description

The present invention relates to a network type electronic component for surface mounting such as a network resistor and a capacitor array.

(B) Conventional technology Conventionally, a network resistor has a plurality of resistors 72 formed on a substrate 71 as shown in FIG. 7, and one ends of these resistors 72 are commonly connected by a conductor pattern 73. In some cases, the other end of the resistor 72 is connected to an individual terminal section 76 via an individual conductor pattern 75 while being connected to a common terminal section (electrode) 74.

(C) Problems to be Solved by the Invention The above-described conventional network resistor has the following features:
Although the interval of 76 is constant, the number of terminals on two sides is different, and a terminal for common is also provided on only one side. Therefore, the terminals on the two sides are not symmetric with each other. for that reason,
When the network resistor shown in FIG. 7 is mounted on the wiring pad 82 of the wiring circuit 81 as shown in FIG. 8, there is a problem that if the chip mounting angle is shifted by 180 ° and becomes the opposite direction, incorrect wiring will occur. . Further, even if the number of terminals on the two sides is the same, the terminal for the common is provided on only one side, so that the circuit is not symmetrical. 180 chips
゜ If mounted on the contrary, there is also a problem that incorrect wiring will occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a surface-mounting network-type electronic component that does not cause erroneous wiring regardless of whether the mounting direction is forward or reverse.

(D) Means and Action for Solving the Problems In the surface-mounting network-type electronic component of the present invention, a conductor pattern for an individual electrode including a plurality of terminal portions is provided on a substrate. The resistive film layer and / or the dielectric film layer are electrically connected between the common electrode conductor pattern and each individual electrode pattern, the terminal portions of each conductor pattern are exposed, and two opposite sides of the substrate are formed. In those arranged at equal intervals on the periphery,
The substrate has corner portions at four corners, and the common electrode conductor pattern has at least two terminal portions and a conductor pattern portion commonly connecting the terminal portions, and these terminal portions are connected to each other by the two sides. Is arranged at a position equidistant from the opposite end.

In this surface mount network type electronic component, the terminals are equally spaced, and at least two common terminals are symmetrical on two sides. In either case, no miswiring occurs.

(E) Examples Hereinafter, the present invention will be described in more detail with reference to examples.

FIG. 1 is a schematic diagram of a network resistor showing one embodiment of the present invention. This embodiment network resistor 1
Are opposite long sides 2 of a substrate 2 such as an alumina ceramic.
A and 2b are provided with a plurality of terminal portions _3-1 , _3-2 ,..., _3-10 at equal intervals. Of these terminals _3-5 and _3-10
Of the common electrode conductor patterns 4 arranged at equal intervals from the opposite ends 2c and 2d of the common electrode, and are commonly connected by conductor pattern portions (portions covered with the protective film 7). . Each terminal unit 3 _-1, ..., 3 and _{-4, 3-6,} ... _3-9, the individual electrode conductors are disposed in each opposite position pattern
6 _-1 ,..., 6 _-4 , 6 _{-6 ,.
-1} , ..., _3-4 and _3-6 , ..., _3-9 conductor patterns _6-1 , ...,
_6-4 and 6 _-6, ..., 6 _-9 and the conductive pattern 4 respectively resistance film 5 _-1 between, ..., 5 ₄ and 5 _-6, ..., 5 _-9 are formed. An example of the pattern structure of the network resistor 1 of this embodiment is as shown in FIG. 3, and FIG. 4 is a sectional view taken along line AA of FIG. As shown in the figure,
Conductor patterns 4 and 6 _-1, ..., _6-4, 6 _-6, ... 6 _-9 and portions excluding the terminal portion of a resistive layer 5 _-1, ..., 5 _-4, 5 _-6, ..., A protective film 7 is formed covering _5-9 .

The conductor patterns 4, 6 _-1 ,..., 6 _-4 , 6 _-6 ,..., 6 _-9 are formed of a thick film or a thin film of gold, silver, or the like.
3 _-1 ,..., 3 _-10 are plated with Ni, solder, or the like. Glass, resin, or the like is used as the protective film 7.

When the network resistor 1 of this embodiment is mounted on a wiring board 8, as shown in FIG. 2, the network resistors are mounted on wiring pads _9-1 , _9-2 ,..., _9-10 provided on the wiring circuit board 8. 1 of the terminal portion 3 _-1, 3 _-2, ..., 3 _-10 are arranged so as to correspond, and each pad, so that soldering the terminal portions. In this case, 9 _-5 and 9 _-10 are pad electrodes for common, and the other pads 9 _-1 , ..., 9 _-4 , and 9 _-6 , ..., 9 _-10
Is a pad electrode for individual use.

Now, the state shown in FIG. 2, i.e. the terminal portion 3 _-5, to state that the pad portion 9 _-5 corresponds, resistor networks 1 1
When mounted on the printed circuit board 8 in reverse, the terminals _3-10 are soldered to the wiring pads _9-5 . In this case, the terminals _3-5 And _3-10 are commonly connected as common terminals from the conductor pattern portion, so that there is no problem and no erroneous wiring occurs. Therefore, when mounting the network resistor 1, there is no need to consider the direction. In the case of conventional network resistors, if the direction is different in automatic mounting, 180
必要 It is necessary to change the direction of the network, but in this embodiment, the network can be arranged at an appropriate position by changing the angle up to 90 °, which is very convenient.

In the second view, the common terminal 3 _-10 has been connected to the dummy land electrodes 9 _-10, the dummy land electrodes
A conductor pattern may be formed from 9 _-10 to another circuit, and the conductor line 4 may be used as a jumper line.

The network resistor of this embodiment is often used as a pull-up / pull-down resistor of a digital signal circuit, but as shown in FIG. 6, the terminal electrodes 9 _-6 , 9 _-7,.
By passing bus lines 10 _-1 , ..., 10 _-5 during 9 _-10
A pattern is easily formed. FIG. 5 is a schematic view of a network resistor showing another embodiment of the present invention. In FIG. 5, the same reference numerals as in FIG. 1 denote the same components.

The resistor networks this embodiment, FIG. 1 as well as the resistance film layer _5-1, ..., 5 _-4, 5 _-6, ..., 5 _-9 each individual terminal unit _3-1, ..., 3 _{- 4} , 3 _-6 ,..., 3 _-9 and the common conductor pattern 4, respectively, and are formed on the upper surface of the substrate 2. On the other hand, the resistance film layers 11 _-1 , 11 _-2 ,
..., 11 _-4 and 11 _-6, ..., 11 _-9, in the back surface of the substrate words 2, one individual electrode _{3-1, 3-2,} ..., 3 _{-4, 3-6,} ..., 3 _{- 9}
To the common terminal
Connected to _3-5 and _3-10 . Then, in this embodiment, 3 _-5 terminal portion for Vcc of, by using 3 _-10 for the ground, can be configured as a terminator circuit.

In the above embodiment, each of the resistors has eight elements. However, the number of resistance elements such as four elements or sixteen elements can be appropriately changed as needed.

Further, with respect to the above conventional example and the embodiment of the present invention, the conventional example shows a concave terminal portion, and the embodiment shows a convex terminal portion. Needless to say, it may be.

Further, in the above embodiment, the network resistor in the case where the resistance film layer is formed between the plurality of terminal portions and the common terminal portion has been described. However, the present invention is not limited to this, and the individual electrode terminal portion and Also, the present invention can be applied to a capacitor array or the like in which a dielectric film layer is formed between common electrode terminals.

(F) Effects of the Invention According to the present invention, the terminal portions of the conductor pattern for the common electrode are commonly connected by the conductor pattern portion, and are arranged at the same distance from the opposite ends of the two sides of the substrate. Therefore, since the terminals are located on the diagonal line of the board, even if the mounting direction of the electronic components is shifted by 180 ° and is reversed, there is no erroneous wiring, and the mounting direction can be either forward or reverse. Erroneous wiring occurs and handling becomes very convenient.

In connection with this, when mounting electronic components, for example, even if the angle is shifted, a correction of 180 ° is required in the conventional case, but in the present invention, a correction of 90 ° or less is sufficient.

Also, since the substrate has corners at four corners, for example, when mounting on a circuit board or the like, the corners are image-recognized and automatically automated in the same way as with a well-known chip component such as a chip resistor. Can be implemented.

Furthermore, since it is an image mounting type, the density of the substrate can be increased as compared with, for example, a DIP (dual in-line package).

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a network resistor showing one embodiment of the present invention, FIG. 2 is an explanatory diagram of a case where the network resistor is mounted on a circuit board, and FIG. FIG. 4 shows an example of a pattern arrangement of a network resistor, FIG. 4 is a cross-sectional view of the network resistor taken along line AA in FIG. 3, and FIG. 5 is another embodiment of the present invention. FIG. 6 is a schematic configuration diagram of a network resistor showing an example. FIG. 6 is a diagram showing a bus line arrangement pattern when the network resistor of the embodiment shown in FIG. 1 is used as a pull-down or pull-up resistor of a digital circuit. FIG. 1 is a schematic configuration diagram of a conventional network resistor, and FIG. 8 is an explanatory diagram when the conventional network resistor is mounted on a circuit board. 1: Network resistor, 2: Board, _3-1 , _3-2 , ..., _3-4 , _3-6 , ..., _3-9 : Individual terminal, _3-5 , _3-10 : Common terminal portion of the 4: conductor pattern for the common, _5-1, ..., 5 _-4-5-6, ..., 5 _-9: resistive film layer, _6-1, ..., _6-4, 6 _-6 - … _6-9 : Individual conductor pattern, 7: Protective film.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 57-78636 (JP, U) JP-A 63-70107 (JP, U) JP-A 3-32403 (JP, U) JP-A 3- 92006 (JP, U) Hikaru 2-92905 (JP, U)

Claims (1)

(57) [Claims] 1. A conductor pattern for a common electrode including a terminal portion and a conductor pattern for an individual electrode including a plurality of terminal portions are formed on a substrate, and a resistance between the common electrode conductor pattern and each of the individual electrode conductor patterns is formed. The film layer and / or the dielectric film layer are electrically connected, and the terminal portions of each conductor pattern are exposed,
In the surface-mounted network-type electronic component arranged at equal intervals on two opposite sides of the substrate, the substrate has corners at four corners, and the common electrode conductor pattern has at least two Surface mounting, comprising: a terminal portion; and a conductor pattern portion commonly connecting the terminal portions, wherein the terminal portions are arranged at equal distances from opposite ends of the two sides. Network type electronic parts.