JPH01316905A - Hybrid integrated circuit board - Google Patents

Abstract

PURPOSE:To obtain a circuit substrate possessed of a resistance value accuracy and an allowable power required by a method wherein a resistor shortcircuiting conductor is provided onto resistors connected to each other in series and both ends of the resistor to be disused are shortcircuited. CONSTITUTION:A resistor shortcircuiting conductor 7 is provided, which divides a resistor 2 in an adequate ratio. To obtain a low target resistance value, a resistance value is adjusted between the conductors 3 and 7, and the conductors 1 and 7 are shortcircuited to each other with a chip jumper or a silver paste 8 at a component packaging process. For a high target resistance value, a resistance value is adjusted between the conductors 1 and 3 and the conductors 1 and 7 are kept disconnected with each other. By these processes, a resistance value accuracy and an allowable power required can be easily obtained.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to hybrid integrated circuit boards.

[Prior art 1] Conventionally, when developing multiple types of hybrid integrated circuits that have the same circuit content but different required resistance values, it has been necessary to reduce the preparation time for the conductor and resistor forming process, and to use a printing screen or exposure mask. In order to reduce the number of points to be managed, it is ideal to share conductor patterns and resistor patterns without preparing individual conductor patterns and low-antibody patterns for each product type.

However, if the patterns are shared on the condition that the resistors are made of materials with the same area resistance value, the trimming width of the resistor will be shortened for products that require a high target resistance value. This causes disadvantages such as deterioration of resistance value accuracy and reduction of allowable power amount.

Figure 1(a) is a partial circuit diagram for explaining an example of a hybrid integrated circuit board that shares a pattern, and Figures 1(b) and (c) correspond to the circuit diagram in Figure 1(a). The resistor 2 is formed between the conductor 1 and the conductor 3, and the conductor 3 is connected to the electrode 4 of the transistor 5. Insert and adjust.

Figure 1(b) shows the state after trimming in a product that requires a low target resistance value.
The trimming bar width is normal.

Figure 1(c) shows the state after trimming in a product that requires a high target resistance value.
The width of the trimming bar is too short.

The resistors 2 shown in FIGS. 1(b) and 1(C) are made of materials having the same sheet resistance value.

[Problems to be Solved by the Invention] In the hybrid integrated circuit board having the above configuration, among the types that share the pattern, for the types that require a high target resistance value, the trimming width of the resistor is short. It's getting too much,
Problems such as deterioration of resistance value accuracy and decrease in allowable power amount arise.

[Means for Solving the Problem 1] The present invention provides a hybrid integrated circuit board having a conductor and a resistor on the substrate, by providing a conductor for shorting the resistor on the resistors connected in series, and removing unnecessary portions of the resistor. This is an attempt to solve the above problem by short-circuiting both ends with a chip jumper, silver paste, etc.6 [Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 2 is a pattern diagram for explaining one embodiment of the present invention, and parts having the same functions as those in FIG. 1 are given the same reference numerals.

The feature of Fig. 2 is that the pattern can be shared among multiple types of hybrid integrated circuit boards that require different resistance values as shown in Fig. 1 (b) and (C), and the trimming process of the constituent resistors The resistance value can be adjusted while leaving the normal width of the trimming bar.

This can be realized by preparing a resistor shorting conductor 7 that divides the resistor 2 into appropriate resistance value ratios.

In order to obtain a low target resistance value in FIG. 2 corresponding to the trimmed resistor 2 in FIG. 1(b), the resistance value is adjusted between the conductor 3 and the resistor shorting conductor 7, and At times, a chip jumper or silver paste 8 is used to short-circuit the conductor 1 and the resistor short-circuiting conductor 7.

In addition, if you want to obtain a high target resistance value in Figure 2 that corresponds to the trimmed resistor 2 in Figure 1 (C), adjust the resistance value between conductor 1 and conductor 3, The short circuit conductors 70 are left open.

[Effects of the present invention]

As explained above, according to the present invention, when developing multiple types of hybrid integrated circuit boards having the same circuit content and different required resistance values, the required resistance value accuracy can be achieved regardless of the product type. , the allowable amount of power can be easily obtained.

At the same time, it also reduces preparation time when forming conductors and resistors.
In addition, the number of printing screens or exposure masks to be managed can be reduced, leading to a significant reduction in manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is for explaining an example of a conventional hybrid integrated circuit that shares a pattern, and (a) is a partial circuit diagram;
(b) and (c) are pattern diagrams corresponding to the circuit diagram of (a). FIG. 2 is a pattern diagram of one embodiment of the present invention. In the figure, 1 is a conductor, 2 is a low antibody, 3 is a conductor, 4 is a transistor electrode, 5 is a transistor, 6 is a trimming groove, 7 is a resistor shorting conductor, and 8 is a chip jumper or silver paste. .

Claims (1)

[Claims] 1. A hybrid integrated circuit board having a conductor and a resistor on a substrate, characterized in that a resistor shorting conductor is provided on the resistor connected in series between the conductors.