JPH02110902A - Resistance value correction method - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for modifying the resistance values of resistor blocks of a hybrid integrated circuit when adjusting the electrical functions of the circuit.

In a conventional technology hybrid integrated circuit, a resistor block 1 is formed as shown in FIGS. 4 to 6. In FIGS. 4 and 6, a printed resistor 3A as a resistor is shown between conductive patterns 2A and 2B.
, 3B, and 3C are formed, and in FIG. 5, printed resistors 3D, 3E are formed between conductive patterns 2A and 2B via conductive pattern 2C. Here, printed resistors 3B and 3C.

3D and 3E have different specific resistances. Conventionally, conductor pattern 2A
When modifying the resistance value between and 2B, print resistance 3A~
The method used is to increase the resistance value by making cuts in 3D to obtain the required resistance value.

Problems to be Solved by the Invention In such conventional resistance value correction methods, when the range of resistance value correction required to satisfy electrical functions is wide,
When formed with one resistor, a resistor with a wide area is required. When forming resistors with multiple resistors with different resistivities, coarse adjustment is made with the resistor with higher resistivity, and fine adjustment is made with the resistor with lower resistivity, but the uncorrected resistance of the formed resistor Since the value is determined by the lowest resistance value when adjusting the electrical function, a large resistance value area is required.

When the electrical function shows a large change depending on the resistance value, it is extremely difficult to make adjustments at the point of change.

SUMMARY OF THE INVENTION An object of the present invention is to provide a resistance value correction method that allows electrical characteristics with a wide resistance correction range to be adjusted with high accuracy using a resistor formed in a narrow area.

Means for Solving the Problems The resistance value correction method of the present invention aims to adjust the resistance value between two specific conductive patterns in a resistance block formed by providing a resistance element between a plurality of conductive patterns. When correcting the resistance value to the desired resistance value, short-circuit the necessary ones of each resistance element with a conductor or connect them between the two conductive patterns with a conductor to make the resistance value lower than the target resistance value, Next, the effective resistance element connected between the two conductive patterns is modified to increase the resistance value to a target resistance value.

According to this configuration, the resistance value is lowered by appropriately connecting the circuits of the resistance blocks with conductors, and then the resistance value is increased and finely adjusted by making cuts in effective resistance elements.

EXAMPLES Hereinafter, the resistance value correction method of the present invention will be explained based on specific examples.

1 and 2 show a first embodiment. A resistor block 4 as shown in FIG. 1 is provided in the hybrid integrated circuit. That is, conductive patterns 5A, 5B, 5G, 5D
is printed, and between conductive patterns 5A and 5C, 5C
Printed resistors 6A, 6B, and 6C having different specific resistances are formed between and 5D and between 5D and 5B, respectively.

A resistor block 4 having the configuration shown in FIG. 1 is printed, and a specific 2
The electrical characteristics between the conductive patterns 5A and 5B as two conductive patterns are measured, and if the resistance value is low, correction is started from the printed resistance with a high specific resistance, and the characteristics are finely adjusted using the printed resistance with a low specific resistance.

If the resistance value is high at the time of printing with respect to the desired characteristics, one of the printed resistors 6A to 6C, in this case printed The resistor 6A is electrically short-circuited, thereby lowering the resistance value between the conductive patterns 5A-5B, resulting in a low resistance value for the desired electrical characteristics, and then effective printed resistors 6B, 6
Cuts 8 and 9 are made in C and the resistive film is removed by cutting or other means to increase the resistance value and bring it closer to the resistance value of I''.

In this first embodiment, printed resistors 6A to 6A are used as resistance elements.
Although it is assumed that three resistors of 6C are used, the number of resistors is determined based on the resistance correction range and accuracy required by the intended electrical characteristics, and the number of resistors is not specified.

FIG. 2 shows a second embodiment. Here, conductive pattern 5
A resistor block 4 is formed by providing printed resistors 6A, 6B, and 6C between A and 5B, between 5B and 50, and between 513 and 5D. , a conductive paste 7 is applied between 5A and 5D. When the conductive paste 7 is applied between the conductive patterns 5A and 50, the printed resistor 6B is connected in parallel to the printed resistor 6A to lower the resistance value, and then the effective printed resistors 6A and 6B are cut to reduce the resistance value. Increase it to get closer to the desired resistance value.

In each of the above embodiments, the conductive paste 7 is used as the conductor, but this can also be realized by wire bonding, soldering, or the like. Further, the conductive patterns 5A to 5D are printed conductors and etched conductors.

It can be created using methods such as Metsuki. Although printed resistors 6A to 6C were used as the resistive elements, the same applies to thin film resistors, surface mount resistors, and the like.

Effects of the Invention As described above, according to the present invention, not only can the resistance elements be modified to increase the resistance value to bring it closer to the target resistance value, but also as a pre-process, necessary ones of each resistance element are made conductive. In order to keep the resistance value lower than the desired resistance value by short-circuiting with a conductor or connecting between the two conductive patterns with a conductor, electrical characteristics that require a wide modified resistance value range can be modified using a narrow area resistance. It can be easily corrected with high accuracy.

Further, it is possible to achieve the effect of enabling highly accurate correction when the change in electrical characteristics is large relative to the change in resistance value.

[Brief explanation of drawings]

1 and 2 are plan views of a resistance block before and after correction by the resistance value correction method of the present invention, FIG. 3 is a plan view of a resistance block of another embodiment, and FIGS. 4 to 6 are FIG. 3 is a plan view of a conventional resistance block, respectively. 4... Resistance block, 5A to 5D... Conductive pattern, 6A to 6C... Printed resistance [resistance element], 7... Conductive paste (conductor), 8.9... Notch. Agent Yoshihiro Morimoto Figure 3 5A-so 111@Haaq->6.4-6C-6plp'IJ (S anti(J &tfL!'
#) Figure 4 Figure 6

Claims (1)

[Claims] 1. In a resistance block formed by providing resistance elements between multiple conductive patterns, when modifying the resistance value between two specific conductive patterns in the resistance block to the desired resistance value, the necessary short-circuit or connect a conductor between the two conductive patterns to make the resistance lower than the desired resistance, and then connect the effective resistance between the two conductive patterns. A resistance value correction method that modifies the element to increase the resistance value to the desired resistance value.