DE1002090B - Process for the manufacture of a printed current coil for electromagnetic electron beam deflection systems or transformers - Google Patents

Description

There are printed current coils are known, which consist of a flexible insulating tape that on its two sides each have a series of imprinted Carries solenoids that are offset from one another in a certain way. The individual successions, -den Members of these sequences are connected from one side to the other by metallizations, which pass through holes evenly distributed along the length of the tape. At least one side of the The tape is covered with an insulating cover. In these known coils, the insulating tape is on on which the windings are printed, folded in a zigzag with an insulating layer in between. In the Cutouts for an iron core are made in the middle of the individual spiral turns.

In contrast, the invention relates to a method for producing a printed current coil for electromagnetic Electron beam deflection systems or transformers that emerge from a spiral with certain inner and outer diameter consists, which by winding isolated turns of the flexible insulating tape is formed, which is printed on both sides with two sequences of carries conductive spirals that alternate from one side to the other through metallizations connected by holes, each following the ends of the conductive spirals of the two describe. The inventive method is characterized in that the flexible insulating Tape at certain intervals that increase with an increase in spiral dimensions from one end of the Ribbon spiral are linked to the other, is provided with holes that a metal skin is attached both sides of the tape and thus also on the edges of the holes that the metallized support is sensitized photographically that the two planes to a certain Offset values against each other and regularly in their dimensions according to the distance between the holes increasing spiral sequences are printed simultaneously on both sides that the printed Drawings are developed, watered and etched at the same time, and then the etched and dried Product is wound onto a mandrel with its sides isolated from one another, in Depending on its diameter, the holes and the negative size were chosen so that the Holes come to lie on the same radii, as well as that finally the mandrel pulled out and that finished product is finally attached to its destination.

The fact that the tape is not folded but: wound allows it to be easily slipped onto the neck of a cathode ray tube without the need for a method of making a printed electromagnetic current coil
Electron beam deflection systems
or transformers

Applicant:
Center d'Etudes et de Developpements

de l'Electronique (CEDEL),
Courbevoie, Seine (France)

Representative: Dipl.-Ing. E. Prince and Dr. G. Hauser,
Patent attorneys, Graefelfing near Munich, Aribostr. 14th

Claimed priority:
France January 15, 1954

Jaques Marie Noel Hanlet, Paris,
has been named as the inventor

that cutouts for the iron core are required. The winding can be done in a very simple way be made automatically.

The method described is further characterized in that all method steps are continuous Successive assembly lines can be carried out.

In a modified embodiment, the insulating cover can be provided by a flexible insulating tape be replaced, which is wound at the same time as the tape supporting the solenoids.

Certain additional measures are also provided, which are described in detail below and the most important of which is that the perforations of the as yet unprinted insulating tape are made after it has been wound onto a mandrel of a certain diameter, this diameter being equal to that of the core is to which the finished coil is to be applied later. If D denotes the diameter of this core and Δ D denotes the change in diameter with each turn, then automatically results in a step length of the perforations that is equal to -? - ^ - "J - ^{Δ D)} for two solenoid members to be printed per turn. The negatives are then printed with a progressive one

609 769/220

Distortion such that the width of the solenoid members increases by AD with each turn while their length changes by π AD .

Preferably also before the final. Winding of the printed tape the winding drawing, which was made coherent by the metallization of the holes mentioned, in the Thickness reinforced by making an electroforming. Treatment to deposit a conductive material in the drawing is subjected.

Further details emerge from the following description of some exemplary embodiments on the basis of the drawing. 1 shows in a simplified oblique image,

The intermediate product to be manufactured, namely a tape that is electrically printed on both sides, is for example shown in Fig. 3. It consists of an insulating support, on one side of which5 the links3 5 (Fig. 3 a) and on the other side 6, the links 4 are printed (Fig. 3 b). These two episodes, of Links are isolated from one another through the thickness of the carrier and must be connected to one another in the manner mentioned get connected.

According to Fig. 4, an insulating tape 7 is preferably made of a plastic material such as polyvinyl or polytetrafluoroethylene, initially perforated at intervals, which is half the circumference of the cylindrical core (mandrel or support) on which the tape

Fig. 2 shows, in the plane, a type of deflection coil for which 15 is to be rolled up after printing speak the procedure described advantageous. These holes 8 are here with the same can be used at intervals, but have to be continuous

Fig. 3 shows the intermediate product, which is used for the manufacture of increasing diameter in order to achieve the mutual. A deflection coil of this type must be made, taking into account the shift that was mentioned at the beginning of FIG. - Fig. 5 shows a few later stages of the process. The step length must therefore be between FIGS. 6, the continuation of FIG. 5 and the edges of the holes 8, and not between their central FIGS. 7 the intermediate product, which will be measured during manufacture points. Such a distribution is shown in a transformer winding according to the same method for the sake of clarity on an exaggerated scale in FIG. 4 and with the same devices as in FIG. 4 and FIG. It can be obtained immediately until 6 has to be made. the, as shown in Fig. 4b by the required In Fig. 1 is indicated at 1 a portion of the neck of a borrowed length of the tape 7 together with insulating cathode ray tube around the; a deflection intermediate layers 31 and 32 (one may also suffice) coil 2 is laid around. This is the clarity 30 on a mandrel 12 on wraps. The diameter of this half by a double turn of the two wick domes is the same as the inside diameter of the finished lungs from which it is composed, shown. Coil winding. The intermediate strips are chosen in such a way that these two windings are electrically connected in series that their total thickness is the same as that of the later one. The winding can practically consist of an over insulating tape and the protruding metal layer support of solenoid members 3 and 4 (FIG. 2) on the tape still to be treated. These are formed, which are isolated from each other, but electrical thickness is known beforehand, since they are connected in series with the difference tric. If 3 denotes the first between the diameters of the mandrel 12 and a link, the connection is linked inside its imaginary cylindrical surface 35, which delimits the finished upper half, for example with the corresponding winding from the outside. Other connection of the link 4 connected. The connection in 40, on the other hand, depends on the current density provided for the lower half of this link 4 to be produced. The perforations 13 corresponding connection of another member, which is then designed diametrically opposite with the help of 3, connected and so on in the assumed conical or frustoconical layering of holes. iron made that through the entire winding 'instead of making links 3 and 4 individually, they 45 are driven through. If AD denotes the stacking up and the successive change in the diameter of each turn, connecting links to one another by soldering, D being the diameter of the mandrel, the opening such a winding is made by winding an angle of the punches proportional to half of this band that this band Links are taken on both of its modification, which carries the desired effect printed on the sides. Such a wound 50 results. If so, the tape from the mandrel. 12 unrolled and spiral can then, on the neck of the cathode ray is drawn off, so it appears in the shape of the tube or on a tube surrounding this neck - Fig. 4 a.

shaped carrier, if it is now the tape of a double-sided metallization

is a deflection coil. In the event of a trans- fer, and this metallization becomes formator, the spiral can be applied to a magnetic core 55 by vapor deposition of a conductive material in the Va- or on another coil which has a different winding or in a neutral atmosphere of the transformer forms, be pushed on. The coating 9 in Fig. 4c only needs a few the. To have a micron thickness according to the method described.

posed winding is thus primarily characterized in the course of this metallization, how

characterized in that it is made from a single, on both sides 60 at 10 in the cross section of FIG. 4d, a body printed band. If you d the, tende layer on the wall of each hole 8, so that

the two cast down coats over each
these holes are electrically connected to each other.
Towards the two so metallized and electrically

The diameter of a turn of the finished winding must be the one printed on one side Link 3 to a suitable one! Route, here

Against the other on the side of printed pages ^& sammenhängenden ⁵ will now a photoempfind ^{ö ö &} Liehe layer 11 is applied (Fig. 4 c and 4d). That

Links 4 be offset. In addition, metallic metallized and sensitized tape is now prepared for double-sided photographic printing of the drawings of winding members 3 and 4 70 (Fig. 2).

Connections must be made between these members, and this happens simultaneously with the Imprint of the solenoid links.

This photographic print can be made in one of the following two ways, preferably after the second. Either you draw a single element 3 and a single element 4 and project them onto the corresponding sides of the tape, letting them advance one step after each projection (and at the same time regulating the enlargement of the negatives in such a way that the length drawn on the tape each of them increases by π Δ D and the width increases by Δ D for each setting), or the two distorted negative sequences are prepared beforehand on transparent substrates and the imprint is effected by contact exposure. This second method is shown on the left in FIG. The device known per se is only shown schematically. The prepared tape 15 is passed together with two drawing tapes 16 and 17 in front of windows 18, which are illuminated by lamps, preferably with short-wave radiation. The type of drawings on the strips 16 and 17 need not be shown again: to be, since they can be seen directly from Fig. 3a and 3b.

The printed tape 15 can then directly into a development trough 21, then into a Fixing trough 22 and from there into a watering trough 23. It can also after passage can be introduced directly into an etching trough 24 by a drying device. The etching removed the metallization of the unprinted parts of the two sides. It goes on quickly as it only must remove a very small thickness of metal. On the other hand, it preserves the conductive bridges between the both sides, because these bridges are printed at the same time with the drawings of the solenoid windings been.

After the etching has ended, the printed tape is introduced into an electroplating bath (FIG. 6) the electroplating is preferably carried out in two successive stages. In one first trough 26 is a copper plating of the remaining in continuous passage in an alkaline copper bath Metallization made, while in the trough 27 thereupon an additional galvanic reinforcement the metal layer takes place in a strongly acidic copper plating bath. This way you will be proportionate with high speed the thickness of the conductors forming the windings and their connection points brought to a few hundredths of a millimeter, as is desired for the deflection coil.

At the exit of the last electroforming bath, the printed tape is watered by passing it through a washing trough 28 is guided, then dried at 29 and wound onto a mandrel 30. This Dorn can be the final one. Have inner diameter of the winding, and in this case can be an insulating Coating on one or both sides of the printed and reinforced tape after drying have been applied at 29. This application can be carried out in a known manner from a fixed device done on the moving belt, and followed by a renewed drying. Instead of Before applying a coating, you can also apply the tape with one or two insulating tapes in between wind it on the mandrel as needed.

The thickness of the metallization could be increased prior to photographic sensitization, however this would slow down the etching process.

In the case of a transformer winding (Fig. 7) is a respective reversal of the direction of circulation of the current not necessary for the transition from one side of the belt to the other, because not like a deflection coil such a current reversal takes place in each winding element.

Claims (10)

PATENT CLAIMS: 1. Process for the production of a printed current coil for electromagnetic electrons - beam deflection systems or transformers, which consist of a spiral with a certain interior and outer diameter consists, which by winding isolated turns of a flexible insulating tape is formed, which on both sides printed two series of conductive Bears spirals that alternate with one another from one side to the other through metallizations are connected by holes, each forming the ends of the conductive spirals of the denote both sequences, characterized in that the flexible insulating tape in certain Distances that increase with an increase in spiral dimensions from one end of the spiral tape on the other hand, holes are made so that a pile of metal is on both of them Sides of the tape and thus also on the edges of the holes is deposited that the metallized Support is sensitized photographically that the two planes to a certain value offset against each other and regularly in their dimensions according to the hole spacing increasing spiral sequences are printed simultaneously on both sides that the printed Drawings are developed, washed and etched at the same time, so that the etched and dried product is then isolated with its sides is wound against each other on a mandrel, depending on its diameter The holes and the negative size were chosen in such a way that the holes have the same radii come lying, and that finally the mandrel is pulled out and the finished product finally to his. Destination is attached. 2. The method according to claim 1, characterized in that in the process stage of the perforation the insulating flexible tape at the same time with at least one interposed. Tape on one The mandrel of the same diameter as the mandrel mentioned is wound up in this State the perforation is made with the help of frustoconical punches and that the thus perforated tape is unwound to carry out the further manufacturing stages. 3. The method according to claim 2, characterized in that the opening of the frustoconical Punch equal to or proportional to half the change in diameter per turn of the final one or provisional spiral is made. 4. The method according to claim 1, characterized in that the simultaneous Drude is carried out by the perforated and sensitized carrier is advanced step by step and that at each step from both sides with mutual offset by the distance between two successive perforations the images of the two solenoids to be printed on the tape are designed in this step, these images being optically enlarged in such a way that their width increases with each turn, i.e. with each number η of distances between the holes distributed on a spiral turn during the perforation. increases, proportional to the change in diameter of two consecutive turns, while their length, under the same circumstances, is proportional to the change in length of the two successive ones Turns divided by the number of hole spacings per turn increases. 5. The method according to claim 1 and 4, characterized characterized in that the simultaneous imprint by a steady passing of the perforated and sensitized tape is made in front of a pair of optical windows, one at the same time Pair of clear ribbons is passed, which one after the other the images of the two Wear solenoid sequences, these being offset and distorted from one another and the bands before were manufactured. 6. The method according to claim 1, characterized in that that the after dear etching .on the tape remaining metallization before winding onto the supply mandrel in at least one electroplating Bad is reinforced. 7. The method according to claim 6, characterized in that the reinforcement is carried out by passing the etched strip through a first alkaline copper plating bath and then through a second, strongly acidic copper plating bath is passed through. 8. The method according to claim 1, characterized in that prior to processing on the supply mandrel the printed tape is covered with an insulating material on at least one side. 9. The method according to claim 1, characterized in that the printed tape simultaneously with at least one insulating intermediate band on which the supply mandrel is wound. 10. The method according to claim 1 and one or more of claims 5 to 9, characterized in that that of the photographic sensitization of the previously punched and metallized The tape continues to be treated in uninterrupted fashion until it is wound onto the final storage mandrel Order is going on. Considered publications:
German patent specification No. 906 831. 1 sheet of drawings © 609 769/220 1.57