DE1589735C - Process for the manufacture of ceramic capacitors - Google Patents

Description

3 .. 4

have used relatively cheap outer coverings or have fewer changes with temperature show than in one of the films alone. The surface 2 will be, for example one open at low temperature usually from one or more of the higher bringing silver color. For example, an end of the Temperature-resistant noble metals palladium, pia capacitor with the formation of a coating 5, which is in tin or from another the firing temperatures 5 conductive connection to the edge portion 3 of the enduring metal made. The covering 2 extends covering 2 is dipped in a silver color, The other end of the capacitor can then be used on a small edge section 3 up to the Edge of the film 1. This edge portion 3 extends formation of an outer metallic coating 6 on the only cover a small part of the film scope. He is dipped in fired pottery in silver paint to this, an exposed edge portion of the io den, wherein the outer covering 6 the inner covering 2 To create a covering on which an electrical connection encloses and overlaps. When you look at the outer clock with the lining 2 can be produced. The coating 6 applies by dipping, this extends remaining part of the coating 2 has from the edge of the film 1 over the edges of the capacitor. It couldn’t Distance, so that an edge zone 4 is formed, but also two separate coverings individually aufgedie there is no covering and the surface is made of ceramic (or the connection at the edges Shem material consists. This edge zone 4 surrounds the could be removed) if the covering is not Main part of the covering 2. should extend over the edges. The one with the outer ones

The film 1 with covering 2 and a film without covering covering provided capacitor can then become at low placed on top of one another so that the edge zones 4 riger temperature for aging of the coverings 5 and 6 of each film lie one on top of the other and that the 20 be sintered. The finished capacitor consists 2 of the film 1 was against the other film without a coating of two partial capacitors. When the pads 6 on is applied. During the firing, the opposite sides of the capacitor connect, like Edge zones of the films with each other, and the covering 2 al- shown, are connected to each other, the Teiltert, where a whole component is connected in parallel with a single capacitor. When the Verbingen inside lining 2 received, which is removed by the 25 manure of the linings 6 at the edges, receives interconnected edge zones of the films with one two partial capacitors. The characteristics of the Except for the edge section 3, on which the capacitors depend on the dielectric self-coating 2 extends to the outer edge, finished off the respective ceramic films. To the Erist. Over the edge section 3, the covering 2 can be used with generation, three of which are electric Connections are connected. 30 but only one from the expensive, at high temperature

The edge zones 4 are made because of the inclination of the ro-resistant noble metal.

hen ceramic material, during the firing Before application of the outer covering 6 has the

nens to connect, completed. Although the loading component has a capacity of zero. When the outer

If 2 is made of an expensive precious metal, the coverings 6 can be applied so that they the inner

Costs are reduced by the fact that only one covering 2 completely overlaps, one achieves the full capacity

umpteen precious metal covering is used. Through the zity. If the outer coverings only a minor one

Method will have an extremely reliable and cheaper overlap if a lower one is achieved

Capacitor manufactured. The higher strength of the capacity. After applying the outer coverings 5

both films reduce the risk of breakage. and 6 the condenser with feed lines

To produce a finished capacitor, it can be provided and encapsulated in the usual way.

1 sheet of drawings

Claims (3)

two partial capacitors using cheap-claims: rem material can be produced. According to the invention, this object is achieved 1. Process for the production of ceramic Kon- solves that only one coated and one non-capacitors, in which raw dielectric ceramic layered ceramic film is stacked Films are made and on a net, and that after firing both flat part the films have a covering from a ceramic side of the assembly with a covering from a see firing temperature resistant metal coating - lower temperature resistant metal coating coating is applied in such a way that these are provided. In an advantageous manner, only the The film resisted the high firing temperatures over a small edge section of the inner film extends to the edge of the film, with the hen, so that only the inner covering is made of a expensive one Part of this covering must be made of precious metal at a distance from the edge. The outer covering or is arranged, in which an uncoated the outer coverings can be made from much cheaper ceramic film on which materials covered with the covering are produced. On the side of a film, this assembly is burned 15 From British patent 794056 a method for producing a ceramic condensate bonding coating for the inner covering is known, in which a ceramic plate is brought out on both sides a metal coating that is stable at ceramic firing temperatures, permanent metal is coated, characterized in that in each case 2 ° ceramic material is applied as dielectric, only a coated and an uncoated ceramic material is fired and finally as a counter-coating a ramischer film can be arranged on top of each other, at low temperatures more stable metal over- and that after firing both flat sides of the train is applied. In this process, assemblies with a coating of one or two precious metal coatings are required, which makes the metal coating resistant to the manufacturer's temperatures more expensive,
be provided. The outer coverings can advantageously be 2. The method according to claim 1, characterized in that, via an edge of the assembly to the parallel form, that the outer linings are connected to one another of the partial capacitors. In the over one edge of the assembly to the parallel-simple way can thereby increase the capacity circuit of the partial capacitors are connected .. ■ ■. the. With particular advantage, the 3. The method according to claim 1, characterized in that the films used are different dielectrics, that they have properties for a capacitor, so that the properties Films used different dielectric properties of one film to complement or combine those of the other so that the properties of the 35 pause. one film complementing or graining those of the other. The invention is now intended by reference retire. to be explained on the figures of the drawing. It indicates - '■ F i g. 1 is a plan view of a raw ceramic 40 see dielectric film on one side one Has a metal coating, The invention relates to a method for the production of F i g. 2 is a plan view of the raw, dielectric development of ceramic capacitors, in which raw see ceramic film of Fig. 1, on which a ro- dielectric ceramic films are produced fro ceramic film is arranged without covering, and on some of the films a covering made of one at 45 F i g. 3 is an edge view of FIG. 2, ceramic firing temperatures resistant metal F i g. 4 a plan view of a finished condenser coating is applied in such a way that this filler and lay over a small portion of the edge of the film to F i g. 5 is an edge view of FIG. 4th
extends to the edge of the film, with the other part of the ceramic capacitor is arranged according to the inventive coating at a distance from the edge 5 ° according to the method of two raw ceramic and in which an uncoated ceramic see dielectric films, namely film on the with The side of a film covered by the covering a film 1, which on one side has a covering 2 laid out of a noble material and this assembly is fired and then covered with a metal coating, and on this assembly a bonding coating of a second film corresponding to the film 1, which is applied for the inner covering which, however, does not have a covering from a 55. The raw films are metal-0.075 to 0.15 mm thick, which is stable at lower temperatures, and consist of a coating. bigen ceramic material, e.g. B. from a titanium atom Such a procedure is from the British passport. The ceramic films can be the same or publication 995 177 known. Having different dielectric properties according to this process, condensate consisting of several layers. B. the thickness, the temperature coefficient made by sators. In this known method or the dielectric constant of these two keras at least two films and usually a mix of films may be different. An advantage of the multiplicity of films superimposed. The coverings use ceramic films with different between the films must, as it has the dielectric properties of the ceramic Firing temperatures should be able to withstand more necessary properties of the film wisely consist of expensive precious metal. can complement or compensate others. So The invention is based on the object, a can, for. B. the combined dielectric constant Method of creating a capacitor or ceramic film with a flatter curve