JPH0379099A - Printed capacitor - Google Patents

Abstract

PURPOSE:To eliminate improper development due to incomplete soldering in the case of soldering a capacitor without necessity of using a capacitor manufactured as a sole component by providing various types of printed capacitors having different capacities on a printed board. CONSTITUTION:A dielectric material 4 is printed on the upper surface of a printed bard 1, an electric circuit is composed on the upper surface of the material 4, a pectinated first pattern 2 having conductivity and a second pattern 3 opposed to the pattern 2 are so laminated as not to be extended from the material 4, the patterns 2, 3 are engaged at an interval, and one end of the material 4 in the space is continuously trimmed. The whole first and second patterns 2, 3 engaged with the material 4 are covered with an insulating material 5, then so covered with a conductive material 5 as to superpose the whole patterns, a whole conductive material 8 is then covered with the material 5 to form a capacitor. Thus, an improper development due to incomplete soldering can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printed capacitor provided on a printed circuit board.

[Conventional technology]

Conventionally, this type of technology uses a capacitor manufactured as a single component and mounts the same capacitor on a printed circuit board.
The electrode legs of the capacitor were soldered to the conductive copper foil pattern that formed the electrical circuit on the back of the printed circuit board.

[Problem to be solved by the invention]

The disadvantages of the above-mentioned conventional methods are that, by using a capacitor manufactured as a single component, defects may occur due to incomplete soldering when the capacitor is soldered, and damage to the electrode legs of the capacitor due to vibration or drop impact may occur. When transporting a single printed circuit board on which the capacitor is placed, contact with components mounted on other printed circuit boards may cause damage to the components that come into contact with them, requiring height restrictions. Occurrence of unfavorable conditions where printed circuit boards cannot be used,
Securing the required volume when mounting the capacitor on a printed circuit board, mounting man-hours when mounting the capacitor on the printed circuit board, ordering and purchasing the capacitor,
This method has drawbacks such as parts management costs such as inventory and supply to manufacturing sites, and the need to secure extra capacitors for after-sales service.

[Means to solve the problem]

In order to solve the above problems, in the present invention, a dielectric material is printed on a printed circuit board, and a comb-shaped first pattern constituting an electric circuit is formed on the dielectric material, and a a second pattern is provided, the comb-like patterns k are interlocked with each other at intervals, one end of the dielectric material is trimmed, and the interdigitated comb-like patterns The present invention provides a printed capacitor characterized in that the entire first and second patterns are covered with an insulating material, and the entire pattern is further covered with a conductive material and an insulating material in a stacked manner.

[Effect]

According to the above configuration, a dielectric material is printed on the top surface of the printed circuit board, an electric circuit is configured on the top surface of the dielectric material, and a first conductive comb-shaped pattern and a The opposing second patterns are stacked so that they do not protrude from the dielectric material, and each of the comb-like patterns is meshed with a gap, and one end of the dielectric material within the meshed gap is The first and second comb-shaped patterns that are successively trimmed with a laser beam and meshed with the dielectric material are covered with an insulating material, and the entire comb-shaped patterns are stacked and conductive. A predetermined capacitor is constructed by covering the conductive material with a conductive material and then covering the entire conductive material with an insulating material.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of essential parts showing an embodiment of the present invention, and a printed circuit board 1 includes capacitors, resistors, ICs, transistors, diodes, volumes, etc. that constitute an electric circuit in a television receiver, for example. switch, tuner,
Various electrical components such as a flyback transformer and a power transformer are mounted, and the back side of the printed circuit board 1 includes a plurality of copper foil patterns that configure a printed wiring electrical circuit and conduct electricity.
Through-holes into which the various electrical components are inserted are formed in the same pattern, and after the electrode layers of the various electrical components are inserted into the through-holes of the pattern, the electrodes of the various electrical components protrude from the through-holes. The layers and patterns are electrically connected by automatic soldering using a dip or by soldering using a soldering iron.

In the present invention, one embodiment of the above-described capacitor will be described.

An electric circuit is configured on one side of the printed circuit board 1, and a comb-like first pattern 2 made of an electrically conductive material such as copper foil is provided on the surface of the printed circuit board 1, and is opposed to the first pattern 2. A dielectric material 4 is placed within the comb-shaped range of the second pattern 3.
The dielectric material 4 is sintered at 300 degrees Celsius for 5 seconds, and then stacked on the dielectric material 4 in order to provide strong adhesion between the dielectric material 4 and the printed circuit board 1. The comb-shaped first pattern 2 and the opposing second pattern 3 are laid so as to mesh with each other with an initially set interval.

FIG. 2 is a front view of the essential parts of one embodiment of the same site, in which an electric circuit is constructed on one side of the printed circuit board 1, and a spiral shape made of conductive material such as copper foil is provided on the surface of the printed circuit board 1. The dielectric material 4 is printed within the intertwined spiral-shaped range of the third pattern 10 and the fourth pattern 11 intertwined with the third pattern 10, and the dielectric material 4 and the pudding) M board 1 are printed. The dielectric material 4 is sintered at 300 degrees Celsius for 5 seconds to provide adhesive strength between the layers, and the intertwined spiral patterns 10 and 11 are initially formed so as to be stacked on the dielectric material 4. Lay them so that they are intertwined with each other at the set intervals.

FIG. 3 is an enlarged cross-sectional view of the main part of the same embodiment, showing the entire area between the comb-like first pattern 2 and the opposing second pattern 3, which are meshed with a gap, The sintered dielectric material 4 is continuously trimmed with a laser beam in order to form the initially set gap-like portions 7, and then the dielectric material 4 and the pattern 2.3 are trimmed continuously with a laser beam. The first insulating material 5 is stacked so as to completely cover the comb-shaped area, and a conductive material is further placed on the upper surface of the insulating material 5 at a position within the range of the insulating material 5 and not in contact with the pattern 2.3. The conductive material 6 is printed so as to be stacked, and the second insulating material 8 is stacked so as to completely cover the range of the conductive material 6, thereby forming a capacitor.

In order to create various capacitors, the width of the comb-like first pattern 2 and the second pattern 3, and the
The width of this gap resulting from meshing with a gap, and the width of the gap-shaped portion 7 obtained by continuously trimming the dielectric material 4 printed in the same comb-like spacing with a laser beam, By changing the width dimension of each of the above, changing the thickness and density of the dielectric material 4, and changing the required amount of each to match the capacitance of the various capacitors, it is possible to create various capacitors with different capacities that constitute an electric circuit. can be created freely.

The first insulating material 5 undergoes a chemical change when the surface of the dielectric material 4 between the comb-shaped first pattern 2 and the second pattern 3 and the pattern 2.3 comes into contact with hands or air. This prevents contact or electrical leakage between the conductive material 6 and the pattern 2.3 and the dielectric material 4, which will be performed next. occurs, causing a change in the initially set capacitance of the capacitor, which serves to prevent the original purpose from changing.

The conductive material 6 protects the capacitor made of the pattern 2.3 and the dielectric material 4 between the patterns 2.3 from receiving radio waves from the outside and having a negative effect on the capacitor. or prevent the radio waves emitted from the capacitor from having a bad influence on electrical components of other electrical circuits, and furthermore, the above-mentioned pattern 2.3 and the above-mentioned pattern 2
．． This serves to prevent the dielectric material 4 and the first insulating material 5 between the capacitors 3 and 3 from being scratched, causing a change in the initially set capacitance of the capacitor, and changing the original purpose of the shielding effect. ing.

The second insulating material 8 may undergo a chemical change when the surface of the conductive material 6 comes into contact with hands or air, causing oxidation, or the surface may be scratched, causing the pattern 2.3 and the pattern 2.3 to be damaged. It prevents the capacitor made of dielectric material 4 between the capacitors from receiving radio waves from the outside and having a negative effect on the capacitors, or prevents the radio waves emitted from the capacitors from affecting electrical components in other electrical circuits. The dielectric material 4 and the first insulating material 5 between the pattern 2.3 and the pattern 2.30
It is responsible for preventing damage to the capacitor, which would change the capacitor's initially set capacity and change its original purpose.

The printed circuit board 1 is mainly made of ceramic or glass cloth-based epoxy. The ceramic is formed by sintering, and the glass cloth-based epoxy is formed by cutting from a fixed-length plate.

The material of the dielectric material 4 is mainly composed of paste ceramic.

The material of the conductive material 6 is mainly made of copper paste.

The material of the insulating material 5 is mainly composed of epoxy resin and polyimide film.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

By providing various printed capacitors with variable capacitance on the printed circuit board, there is no need to use capacitors manufactured as single components, there is no need to use a capacitor manufactured as a single component, there are no defects caused by incomplete soldering when soldering the capacitor, and there is no vibration.・Damage occurred on the electrode legs of the capacitor due to a drop impact, and during transportation of the printed circuit board on which the capacitor was mounted, the same contact occurred due to contact with parts mounted on other printed circuit boards. It is possible to prevent the occurrence of damage between components, and it also solves the disadvantageous situation of not being able to be used in a place where the printed circuit board requires height restrictions, and it is possible to secure the necessary volume when mounting the capacitor on the printed circuit board. This eliminates the need for mounting the capacitor on a printed circuit board, as well as component management costs such as ordering, purchasing, inventorying, and supplying the capacitor to the manufacturing site. This has the advantage of reducing capacitor inventory.

[Brief explanation of drawings]

FIG. 1 is a front view of a main part showing an embodiment of the present invention, FIG. 2 is a front view of a main part of an embodiment of the same location, and FIG. 3 is an enlarged sectional view of a main part of the same embodiment. In the figure, 1 is a printed circuit board, 2 is a first pattern, 3 is a second pattern, 4 is a dielectric material, 5 is a first insulating material,
6 is a conductive material, 7 is a gap, 8 is a second insulating material,
10 is the third pattern, and 11 is the fourth pattern.

Claims (7)

[Claims] (1) printing a dielectric material on a printed circuit board, and providing a first comb-shaped pattern constituting an electric circuit on the dielectric material and a second pattern opposite to the first pattern; The comb-like patterns are interlocked at intervals, one end of the dielectric material is trimmed, and the entire first and second comb-like patterns interlocked with the dielectric material are A printed capacitor characterized by being covered with an insulating material, and further covered with a conductive material and an insulating material in a stacked manner. (2) The printed capacitor according to claim (1), wherein the comb-like pattern has a spiral shape. (3) The printed capacitor according to claim 1 or 2, wherein the printed circuit board is made of ceramic. (4) The printed capacitor according to claim 1 or 2, wherein the printed circuit board is made of glass cloth-based epoxy. (5) The printed capacitor according to claim (1), (2), (3) or (4), wherein the dielectric material comprises a paste-like ceramic. (6) Claim (1) wherein the conductive material is made of copper paste.
), (2), (3), (4) or (5). (7) Claims (1), (2), (3), (4) in which the insulating material is made of polyimide film or epoxy resin.
, (5) or (6).