JPH03228367A - Integrated circuit - Google Patents

Abstract

PURPOSE:To extremely reduce necessity of building a DC power supply in an electronic apparatus and to facilitate assembly of the apparatus in a high density by connecting a pn junction rectifying means to the power supply wiring of an electronic circuit, and connecting the high potential side power supply wiring to the cathode of the rectifying means and the low potential side power supply wiring to the anode. CONSTITUTION:The anode and cathode of rectifying means 1 having a pn junction diode formed on the same substrate as that of an integrated circuit block performs a rectifying operation in synchronization with a period in which the voltage polarities of a commercial power supply applied to input terminals 3, 4 change with positive and negative voltages with time. When the commercial power supply is first applied to the input terminals 3, 4, it is rectified by the means 1, and converted to a quasi-DC voltage having a variation in frequency or twice the frequency of the commercial power supply. The quasi-DC voltage is stored in an external capacitor 7, and smoothed. On the other hand, the voltage smoothed by the capacitor 7 is applied to the block 2, and operated. Thus, the rectifying means is integrated, and the commercial power supply can be applied to the entire integrated circuit.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a method for forming an electronic circuit of a semiconductor integrated circuit.

[Prior Art] Conventionally, it has been considered to make power supply to semiconductor integrated circuits as easy as possible (and to incorporate electronic circuits for power supply into semiconductor integrated circuits. For example, integrated circuits with significantly different DC power supply voltages have been considered. When incorporating into electronic equipment, it is possible to coexist with the power supply for other electronic circuits of the electronic equipment, and to reduce the number of external parts as much as possible, such as building a DC stabilized power supply circuit at the power supply inlet of the integrated circuit. A good example is this attempt.

[Problem to be solved by the invention] Nowadays, with the spread of chopper power supply technology, it has become easier to generate a desired DC power source from a commercial power source.
It must be said that the space for incorporating it into electronic equipment is usable and large. These problems can no longer be ignored in today's world where miniaturization is favored.

The present invention focuses on how a collection circuit should be designed to significantly alleviate the problem of technical rust, and aims to provide an effective method for solving the problem. [Means for solving the problem] In the present invention, as specific means for solving the problem, an integrated circuit board, an electronic circuit formed on the integrated circuit board, and an insulating separation thin film between the integrated circuit board and the wiring layer formed in the manufacturing process of the electronic circuit are provided. pn formed on the thin film
junction rectifier, the pn junction rectifier is connected to the power supply wiring of the electronic circuit formed on the integrated circuit board, and the cathode of the rectifier is connected to the high potential side power supply wiring of the electronic circuit. , an anode is connected to a low potential side power supply wiring of the electronic circuit.

It is characterized by being arranged as follows.

[Example code] The present invention will be described in detail below through specific examples.

FIG. 1 is a basic configuration diagram of the present invention. In the figure, 1 is a rectifier, 2 is a drug type circuit block, 3 and 4 are commercial power supply (AC) input terminals, 5 is a high potential power line for an integrated circuit block, 6 is a low potential power line for an integrated circuit block, and 7 is a low potential power line for an integrated circuit block. The external capacitor is a capacitor.

When commercial power is applied to the 3 and 40 input terminals, the commercial power is rectified by the rectifier 1 and converted into a quasi-DC voltage (pulsating current) having a frequency fluctuation of the commercial power supply frequency or twice its frequency. The quasi-DC voltage is then stored in an external capacitor 7 and smoothed.

On the other hand, the integrated circuit block 2 is operated by applying a voltage smoothed by the capacitor 7.

By integrating the rectifying means as described above, it becomes possible to apply commercial power to the entire drug type circuit.

FIG. 2 shows a specific example of the configuration of the present invention. 1' is a rectifier, 2 is a drug circuit block, 3/, 4/ are commercial power input terminals, 5 is a high potential power line for the drug circuit block 2, 6 is a low potential power line for the drug circuit block 2, and 7 is a capacitor. ,8,
9, 10, and 11 are pn junction diodes formed on the same substrate as the chemical circuit block. Here, the rectifying means 1'
is composed of pn junction diodes 8 to 11, and performs double-wave rectification, that is, rectification operation is performed in synchronization with the period in which the voltage polarity of the commercial power supply applied to the 3' and 4' input terminals switches between positive and negative voltages over time. conduct. First, let us consider the case where the commercial power supply is applied with a positive voltage to 6' and a negative voltage to 4'.The positive voltage input from 3' is applied to the anode of the diode 8. The current flowing out from the cathode of the diode 8 enters the anode of the diode 10 through the path of the high potential power line 5 of the drug circuit block 2 -> inside the centralization circuit block -> the low potential power line 6 of the integrated circuit block 2. . At this time, a voltage is applied to the diode 10 in the forward direction (that is, the direction in which current flows), so it becomes conductive and the diode 10
It flows from the 0 cathode to the 4' commercial power supply (negative voltage).

Next, consider the reverse operation. In other words, the commercial power supply has a positive voltage at 4',
Considering the case where a negative voltage is applied to 5',
The positive voltage from 4' is applied to the anode of diode 9. The current flowing out from the cathode of the diode 90 enters the anode of the diode 11 through the path of the high potential power line 5 of the integrated circuit block 2 -> inside the integrated circuit block -> the low potential power line 6 of the integrated circuit block 2. At this time, the diode 11 is in the forward direction (i.e. the direction in which current flows)
Since a voltage is applied to the diode 11, it becomes conductive and flows from the cathode of the diode 11 to the commercial power supply (negative voltage) 3'. As is clear from the above explanation, in accordance with the alternating operation of the voltage polarity of the commercial power supply, the rectifying means composed of diodes 8 to 11 aligns the inertia of the power supply applied to the drug type circuit block 2 in one direction, so that the drug type circuit block 2 can operate normally.

FIG. 3 is an integrated plan view of the rectifying means shown in FIG. 2.

In the figure, 5" and 4" are metal wiring for commercial power input, 5' is metal wiring for high potential supply of the integrated circuit block, 6' is metal wiring for low potential supply of the integrated circuit block, and 31 and 52 are on the insulating layer. 53, 54, 55.56 are pn junction boundaries formed in the semiconductor region of 31.32, 3
7, 3s, 39, 4o, 41.42 are metal wiring for power supply (
This is a contact hole (hole in an insulating layer) for electrically connecting the semiconductor regions 61 and 32 to each other.

FIG. 4 is a sectional view of the rectifying means accumulation section. In the figure, 4" is a metal layer for commercial power supply, 5' is a metal wiring for high potential supply of an integrated circuit flock, 6' is a metal wiring for low potential supply of an integrated circuit block, 51 is a semiconductor substrate for forming an integrated circuit, 52 A silicon oxide insulating film 45.44 is a semiconductor region formed on the insulating film 42, 45, 46, 47.48 are contact holes for electrical connection with a metal wiring layer, and 49 is a semiconductor region 43.44. 50 is an inactivation film (passivation film) formed in the final step of the semiconductor integrated circuit.

The reason why the rectifying means is formed on the insulating layer is to completely insulate the rectifying semiconductor element from the substrate 41 and eliminate parasitic diodes.
S (5ilicon on 5aphire), SO
工（5ilicon On 工n5ulator）S
IP OX (5ilicon engineered)
In an insulation isolation technique called oxidation, etc., it is possible to realize an even simpler structure. This is because they are A due to the reverse bias of the pn junction.
This is because an electrically completely independent element group can be formed on an insulating substrate rather than being pre-separated.

[Effects of the Invention] If the present invention is implemented as described above, the need to incorporate a DC power supply into electronic equipment becomes extremely low, and high-density assembly of electronic equipment becomes easy.

Further, according to the present invention, unlike conventional integrated circuits, the power supply W
It is possible to prevent the integrated circuit from being destroyed due to incorrect FE application method.

The invention has a wide range of applications. For example, electronic devices installed in automobiles will be able to directly utilize alternating current voltage generated by engine power. It can also be applied to most other everyday home appliances such as electric kettles, vacuum cleaners, and electric washing machines.

[Brief explanation of drawings]

FIG. 1 is a basic configuration diagram of the present invention, FIG. 2 is a diagram of a specific configuration example of the present invention, FIG. 3 is a plan view of an integrated circuit of the present invention, and FIG. 4 is a sectional view of a drug type circuit of the present invention. In the figure 1.1'...... Rectifying means 2.
2', 2"...Integrated circuit block 3, 3/
, 3 //...Commercial power input terminal 4.4
'4''...Commercial power input terminal 5, s', s
“...Integrated circuit block high potential line 6 &6'v6
“...Integrated circuit block low potential line 31.32.
...... Semiconductor region 43.4 on the insulating film
4...... Semiconductor region 2 on the insulating film
figure

Claims (1)

[Claims] An integrated circuit board, an electronic circuit formed on the integrated circuit board, an insulating and separating thin film between the integrated circuit board and a wiring layer formed in the manufacturing process of the electronic circuit, and a pn junction rectifier formed on the thin film. means, the pn junction rectifying means is connected to the power wiring of the electronic circuit formed on the integrated circuit board, and the cathode of the rectifying means is connected to the high potential side power wiring of the electronic circuit, and the anode is connected to the power wiring of the electronic circuit formed on the integrated circuit board. is connected to a low potential side power supply wiring of the electronic circuit.