JPS60208801A - Chip resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In the field of application, Ki Mitsuaki discusses chip resistors. 1'I<kasa,
With the advent of devices that use resistors, people have evolved from resistor configurations to JLT networks and chip resistors. 9. Chip resistors are becoming more compact, lightweight, and highly integrated.In addition, chip resistors have excellent high frequency characteristics f1,
After adhering to the printed circuit board, half l-I]fζjrigail (
It is possible to significantly reduce the amount of damage caused by this process.

A conventional chip resistor will be explained using C1 FIGS. 1 to 4. 1 Figure 1 is a perspective view of the external appearance of a conventional chip resistor, Figure 2 is a mi plane view taken along the line 81 in Figure 1, and Figure 31z1 is a circuit diagram of the same deep resistor [iδ .

As shown in FIG. 2, electrodes 2a, 21+ are formed on a ceramic substrate 1 such as an aluminum plate by printing, firing, etc., and then a resistor 4 is formed in the same manner by printing, firing, etc. . After that, half 11 defense 11, half III (
External type 445 a to cover the ζj property well.

5 Take b by half [1j (=J method etc.)
After packaging with the A film 6, a finished product as shown in FIG. 1 is obtained.

However, in conventional chip resistors, the fourth
When configuring a bleeder bias circuit as shown in the figure, 7a
, 71+ and between 7b and 7a, which resistance ratio is important, and the difference in V[capacitance between the two components is multiplied and becomes a cause of variation in the bias current f[]. In this way, when it is necessary to adjust the resistance ratio between the two rather than the individual values, it is necessary to
(Existence J. It is very difficult to use two of these in pairs.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional technology, and provides a chip resistor that can replace the conventional two components (ζ) with one component, thereby realizing miniaturization and improved precision. The purpose is to

Structure of the Invention ・In order to achieve the above object, the resistor of the present invention has the following features:
Placed between the first electrode and the second electrode? At T1/, a third electrode is placed at an arbitrary position on the resistor.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Fig. 5 is an external perspective view of a chip resistor according to an embodiment of the present invention, Fig. 6 is a cross-sectional view taken along the line Vl-Vl in Fig. 5, and Fig. 7 is the same chip resistor. FIG.

As shown in FIG. 6, between the ceramic substrate 8, the first
Then, the second electrodes 9a, 9b and the third electrode 9C located at an appropriate position between them are formed by printing, firing, etc. Next, the resistor 10 is connected to the first to third electrodes 98 to
J spanning 9C: Formed by sea urchin printing, firing, etc. Thereafter, the first to third external electrodes 118 to 11c are attached using a soldering method or the like, and the protective film 12 is back-packed to form a finished product as shown in FIG.

An example of use of the chip resistor of this embodiment configured as described above will be described below. 'First, for example, the seventh
An electric circuit as shown in the figure can be constructed using one chip resistor. However, two resistors with one terminal in common can be realized with one chip resistor, and the size can be reduced. Note 1.10
a is the electrode 9a of the resistor 10;

The portion between electrodes 90 and iob is the portion between electrodes 9b and 9c of the resistor 10. Furthermore, if the resistance ratio between the two is a problem, such as in the bleeder bias circuit shown in FIG. 4, first laser trimming one of the resistors 10a or 10b,
By laser trimming the other resistor 101zS or 10a to correct this error, a chip resistor having a high resistance ratio of 11 degrees can be obtained.

FIG. 8 is a circuit diagram of a chip resistor according to another embodiment. 1. i, resistor 1
317) - A third electrode 9G is installed at one end ('J: The second electrode 9b and the third frf rod 9G are connected to the BI in the boot resistor.
I ``c'' Since it is connected by a conductor, it can be d.

Detailed description of the invention J, Uni to the present invention, J, If, 3 Chi
Since j' is a chip resistor with an angle of 1, it is possible to use one component instead of the conventional two.
J conversion can be realized. A chip resistor with a high fi'+claw resistance ratio can be removed by laser trimming or the like. Furthermore, by extending the external terminal in the direction 31'i, semi-ITI attachment and st-ability are improved. Connect both ends of the chip resistor according to the present invention to the M source and ground,
When using the voltage obtained in the middle as a bias voltage and supplying it to an electronic circuit, it is best to use a laser-rimmed material that ensures that the relative values of both resistances are constant during the manufacturing process. Good J: Good bias voltage is gJ. For example, a laser with a resistance value of -1! - After rimming, if you set the other target value so as to cancel out the error of the limited value, the resulting bias voltage will be incorrect.
It is about half that of the conventional method, and the accuracy of the circuit can be improved by 1-1. Furthermore, for example, the bias voltage can be used to check the bias voltage. The above bias was supplied by the power supply, and the above chip resistor was installed in a separate culm in order to obtain a bias voltage equivalent to the 11h lightning L1 voltage that was obtained by changing ijJ and obtaining a predetermined gain of 1!7. It is possible to perform laser trimming and finally connect to the circuit.This method allows chip parts to be manufactured at a lower cost than the conventional method of trimming thick-film printed resistors on aluminum substrates. Using the trimming function is demonstrated.

[Brief explanation of the drawing]

? 1] Figure 1 is a conventional 1-horn (1 (external perspective view of a pile hole,
Figure 2 shows the circuit diagram of the same chip resistor in Figure 1, Figure 3 (J), Figure 4 shows the circuit diagram of the same chip resistor (1), Figure 4 (G
J, Schematic diagram of /League Pinos 7 circuit, Figure 5 (,L
An external perspective view of a tsuzoresistor according to an embodiment of the present invention,
Figure 6 shows IrJi along the V[-, Vl line in Figure 5.
A top view, FIG. 7 is a circuit diagram of the same chip resistor, and FIG. b'18 is a circuit diagram of a deep resistor J5 in another embodiment. 9a...first electrode, 9b...second electrode, O
C...i'(3 electrode, 10.43...resistor, l
la...first external type 4? i+, 1111...second
External electrode, 11c...33rd external electrode agent a Hiroshi Kimi Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Add the third 71:i 441 to any position K of the resistor placed between the first electrode and the second electrode.
chip resistor. 2. A third external mold 14+ that contacts the third electrode is disposed between the first external electrode that contacts the first electrode and the second external electrode that contacts the second electrode. ``The chip resistor according to claim 1.