Abstract:
In a method for processing or treating a plurality of printed circuit boards, comprising the following steps:
   providing a plurality of printed circuit boards ( 4, 5, 6, 7 ).   providing at least one frame or carrier element ( 2, 3 ), for coupling to a plurality of printed circuit boards ( 4, 5, 6, 7 ),   coupling or connecting the printed circuit boards ( 4, 5, 6, 7 ) to the at least one frame or carrier element ( 2, 3 ),   processing or treating the printed circuit boards ( 4, 5, 6, 7 ) in the state coupled to the frame or carrier element ( 2, 3 ),
 
it is provided that printed circuit boards ( 4, 5, 6, 7 ) of different sizes and/or thicknesses and/or of different constructions are coupled to the at least one frame or carrier element ( 2, 3 ) to form a composite assembly ( 1 ) and are subjected to further processing in the composite assembly ( 1 ) formed by the printed circuit boards ( 4, 5, 6, 7 ) and the at least one frame or carrier element ( 2, 3 ).
   
 
     Furthermore, a composite assembly ( 1 ) for processing or treating a plurality of printed circuit boards ( 4, 5, 6, 7 ) and also a use of such a method and composite assembly ( 1 ) are provided.

Description:
[0001]    This is a national stage of PCT/AT11/000120 filed Mar. 10, 2011 and published in German, which has a priority of Austria no. GM 168/2010 filed Mar. 16, 2010, hereby incorporated by reference. 
     
    
     FIELD OF THE INVENTION  
       [0002]    The present invention relates to a method for processing or treating a plurality of printed circuit boards, comprising the steps of:
       providing a plurality of printed circuit boards,   providing at least one frame or carrier element for coupling to a plurality of printed circuit boards,   coupling or connecting the printed circuit boards to the at least one frame or carrier element,   processing or treating the printed circuit boards in the state coupled to the frame or carrier element.       
 
         [0007]    The invention, moreover, relates to a composite assembly for processing or treating a plurality of printed circuit boards, including at least one frame or carrier element for coupling to a plurality of printed circuit boards, said composite assembly, in the coupled state of the printed circuit boards, together with the at least one frame or carrier element being capable of being fed to the processing or treating of the printed circuit boards, and the use of such a method and composite assembly. 
       PRIOR ART  
       [0008]    In the context of the production of printed circuit boards, it is known to produce a plurality of printed circuit boards or printed circuit board elements on a common plate-shaped element, such printed circuit boards, as a rule, each comprising a plurality of conducting and insulating layers and/or components integrated in such a printed circuit board. According to those known production methods, the substantially full-area mounting of a plurality of circuit boards on the common plate-shaped element is effected, whereupon, after completion of the circuit boards, the latter are separated from one another. In those cases, each of the circuit boards has a respective edge region about its periphery, and hence outside a substantially central region forming an actual circuit board element, in which central region the structures for mounting the circuit board and/or electronic components are integrated. Said edge region, for instance, is provided for carrying out further circuit board processing steps such as, for instance, in the context of the placing of components to be fixed to at least one surface and/or the installation into an electric or electronic device, in order to enable the manipulation and, in particular, automatic seizure of such a circuit board during subsequent treating or processing steps. According to presently known process controls, it is thus to be anticipated that the peripheral region to be provided for the frame or edge region of the circuit board is likewise usually produced of the same materials and by the same processes as the printed circuit board. Such an edge or peripheral region, which is not required for the functioning of the circuit board bearing in mind the usually multilayered structure comprised of expensive materials, however, will result in elevated costs of such a printed circuit board. In the context of known production methods of printed circuit boards, it is, moreover, to be anticipated that regions or areas located between individual circuit board elements, of the common plate-shaped element will be discarded as waste products such that elevated costs for the production of circuit boards or circuit board elements will also occur in this respect. 
         [0009]    In connection with the production of printed circuit boards it is, for instance, further known to remove individual defective circuit boards from a common plate-shaped element if these have been recognized as defective in the course of tests or checks, and to replace such removed, defective printed circuit boards with individual printed circuit boards. 
         [0010]    In addition, methods for collectively processing or treating and handling printed circuit boards of the initially defined kind are known, according to which several printed circuit boards or printed circuit board elements are usually inserted into carrier or frame elements each surrounding the printed circuit boards about their entire peripheries, and are fixed to them, for instance by gluing, in order to produce a composite assembly comprised of at least one frame or carrier element and a plurality of printed circuit boards. In this respect, it may, for instance, be referred to DE-A 196 00 928, U.S. Pat. No. 4,689,103 or U.S. Pat. No. 5,044,615. Those known methods for inserting printed circuit boards into a frame element each completely surrounding the printed circuit boards in order to produce a composite assembly to be jointly handled, in particular, involve the drawbacks that the reception openings to be provided in the frame element for placing the printed circuit boards have to be precisely adapted to the dimensions of the printed circuit boards to be inserted, and that a proper fixation, for instance by gluing to the peripheral edges of the printed circuit boards and frame elements usually having comparatively small thicknesses, is therefore extremely difficult and cumbersome. 
         [0011]    The known embodiments, moreover, involve the drawback that only printed circuit boards having identical dimensions and/or shapes are each coupled to a frame or carrier element such that different frame and carrier elements are each employed for processing different printed circuit boards. The use of optionally at least partially automated processes will, therefore, be rendered difficult, in particular with small series or low piece numbers, thus increasing the expenditures involved in the respective exchange or adaptation required when treating or processing different printed circuit boards. 
       SUMMARY OF THE INVENTION 
       [0012]    The present invention thus aims to further develop a method and composite assembly of the initially defined kinds in the context of processing or treating a plurality of printed circuit boards to the effect that the above-mentioned drawbacks will be avoided and a method and composite assembly largely renouncing cumbersome and expensive conversion operations when processing printed circuit boards of different sizes and/or shapes or dimensions will, in particular, be provided. 
         [0013]    To solve these objects, a method of the initially defined kind is substantially characterized in that printed circuit boards of different sizes and/or thicknesses and/or different constructions are coupled to the at least one frame or carrier element to form a composite assembly and are subjected to further processing in the composite assembly formed by the printed circuit boards and the at least one frame or carrier element. In that printed circuit boards of different sizes and/or thicknesses and/or technologies and/or different constructions or, in general, different dimensions and/or shapes are coupled to the at least one frame or carrier element to form a composite assembly and said composite assembly is subsequently subjected to further processing of the printed circuit boards, cumbersome and expensive conversion operations of, in particular, the consecutive production or processing lines can be renounced even with small piece numbers or when changing between individual series of printed circuit boards. In doing so, different printed circuit boards that are assigned to a common component after processing, and/or different printed circuit boards that require differently high expenditures in further processing, according to the invention can, for instance, be coupled to at least one frame or carrier element as will be discussed in more detail below, which will result in considerable advantages, for instance, with regard to time and cost savings in the production and processing of such printed circuit boards, by enabling the achievement of a better workload or higher throughput of processing and assembly lines. 
         [0014]    In order to enable simple handling of the different printed circuit boards respectively coupled to at least one frame or carrier element, in particular during a largely automated process, it is proposed according to a preferred embodiment that the configuration or design of the at least one frame or carrier element is selected as a function of the dimensions and/or design of the printed circuit boards to be processed or treated, in order to provide a composite assembly having substantially linear outer edges. When providing substantially linear outer edges of the composite assembly formed by the different printed circuit boards and the at least one frame or carrier element by the appropriate adaption of the configuration or design of the at least one frame or carrier element to the dimensions and/or designs of the different printed circuit boards, further processing or treating operations in a assembly line will thus be simplified in a manner substantially independent of the different printed circuit boards. 
         [0015]    According to a preferred embodiment of the method according to the invention, it is proposed that the external dimension of the composite assembly is selected to be constant, in particular in a direction normal to a transport direction of the printed circuit boards to be processed or treated. It is thereby ensured that at least the dimensions in a passage direction through such a consecutively arranged processing line will be selected to be constant so as to enable the reduction or avoidance of adjustment or conversion operations of such a processing line at a change of, in particular, the sizes or dimensions of the printed circuit boards to be processed. 
         [0016]    To enable a particularly simple adaptation and coupling or connection of the plurality of printed circuit boards to the frame or carrier elements for the production of the composite assembly to be handled subsequently, it is proposed according to a further preferred embodiment that a frame or carrier element is each provided on mutually opposite peripheral or edge regions of the composite assembly for coupling or connecting to a plurality of printed circuit boards. 
         [0017]    To enable particularly simple and reliable coupling between the plurality of printed circuit boards and the at least one frame or carrier element for the production of the composite assembly to be handled subsequently, it is proposed according to a further preferred embodiment that coupling or connecting of the printed circuit boards to the at least one frame or carrier element is each effected by using at least one coupling element of a printed circuit board each matching at least one complementary coupling element of the at least one frame or carrier element. 
         [0018]    To enable particularly simple and reliable handling or processing of the individual printed circuit boards during a subsequent treating or processing step, it is, moreover, proposed that a plurality of printed circuit boards are each connected to the at least one frame or carrier element in a mutually spaced-apart relationship, as in correspondence with a further preferred embodiment of the method according to the invention. 
         [0019]    To further enhance the processing speed or throughput rate through a processing or treating line of such printed circuit boards, it is proposed according to a further preferred embodiment that coupling or connecting between the plurality of printed circuit boards and the at least one frame or carrier element is performed in an automated manner. 
         [0020]    To ensure reliable coupling or connecting of the different printed circuit boards to the at least one frame or carrier element, it is proposed according to a further preferred embodiment that coupling or connecting between the plurality of printed circuit boards and the at least one frame or carrier element is performed by gluing mutually facing end faces of the frame or carrier element and the printed circuit board to be connected thereto. By using a gluing operation, a reliable connection will be achieved between the individual printed circuit boards and the at least one frame or carrier element, optionally by simultaneously using the additionally provided, complementary coupling elements. After all, such gluing operations are common in the context of processes for producing and processing printed circuit boards and thus, in particular, will not constitute additional expenditures or process steps in the context of the production of printed circuit boards or printed circuit board elements. 
         [0021]    For a particularly reliable gluing operation to be optionally performed in an accordingly automated manner, it is proposed according to a further preferred embodiment that the adhesive is applied to at least one end face of at least one element to be connected, and the elements to be connected are subsequently connected by mutual joining or pressing. In this context, it is, moreover, proposed in a preferred manner that applying or introducing an adhesive into a gap between end faces of elements to be connected is accomplished using a dispensing means, a doctor blade, a screen-printing method or the like, as in correspondence with a further preferred embodiment of the method according to the invention. 
         [0022]    In order to improve the throughput rate of a processing or assembly line, it is, moreover, preferably proposed according to the method of the invention that printed circuit boards calling for differently high processing expenditures in the course of subsequent processing operations are coupled or connected to at least one frame or carrier element. By forming a composite assembly from different printed circuit boards requiring differently high processing expenditures after the production of the composite assembly, the devices to be used for treating or processing can be used in an accordingly more uniform manner. As compared to process controls by which identical printed circuit boards optionally requiring different treating or processing operations are each processed, it will thus be possible to employ for the different printed circuit boards, in particular, different devices to be used for subsequent processing, which devices have been accordingly optimized and mutually tuned. 
         [0023]    As already briefly pointed out above, further improvement in the production of printed circuit boards will be achieved in that printed circuit boards which, after processing, will be assigned to a common structural unit, or integrated or arranged in a common structural unit, are connected or coupled to at least one frame or carrier element, as in correspondence with a further preferred embodiment of the method according to the invention. It will thus, for instance, be possible according to the invention to provide kits comprising a plurality of different printed circuit boards or printed circuit board elements in, in particular, finished states of the printed circuit boards, which will, for instance, subsequently be used in a common component. By providing such a unit or composite assembly comprising at least one frame or carrier element and a plurality of different printed circuit boards, it will be possible to reduce both logistic and administrative expenditures when using or installing such printed circuit boards in electronic devices or components, in that a kit or composite assembly will, for instance, contain all printed circuit boards used in an electronic device or component, so that the construction or assemblage of such devices, in particular, will not require printed circuit boards to be provided from different sources involving accordingly increased expenditures. 
         [0024]    The present method according to the invention, according to which printed circuit boards of different sizes and/or dimensions and/or for different purposes of use are coupled to at least one frame or carrier element to form a common assembly or kit, thus allows for a strong reduction of the expenditures involved in providing such different printed circuit boards for the subsequent incorporation of these printed circuit boards in a component or electronic device. 
         [0025]    To solve the initially mentioned objects, a composite assembly of the initially defined kind for processing or treating a plurality of printed circuit boards is essentially characterized in that printed circuit boards of different sizes and/or thicknesses and/or different structures are coupled to the at least one frame or carrier element to form said composite assembly, and that the composite assembly formed by the printed circuit boards and the at least one frame or carrier element is capable of being subjected to further processing. As already pointed out above, it will thus be possible in a simple and reliable manner to form a composite assembly comprised of at least one frame or carrier element and a plurality of different printed circuit boards such that corresponding advantages in respect to both the throughput of, in particular automated, processing and assembly lines and the subsequent use of such finished printed circuit boards will be achieved. 
         [0026]    In order to facilitate handling after the production of the composite assembly, it is proposed according to a preferred embodiment that the dimensions of the at least one frame or carrier element are selected as a function of the dimensions and/or design of the printed circuit boards to be processed or treated, in order to provide a composite assembly having substantially linear outer edges. 
         [0027]    In order to further improve the throughput through subsequent processing lines, it is proposed according to a further preferred embodiment that the external dimension of the composite assembly is selected to be constant, in particular in a direction normal to a transport direction of the printed circuit boards to be processed or treated. 
         [0028]    In order to enable particularly simple and reliable handling of the composite assembly comprised of a plurality of printed circuit boards and at least one frame or carrier element, in particular during a largely automated process, it is, moreover, proposed that a frame or carrier element is each provided on mutually opposite peripheral or edge regions of the composite assembly for coupling or connecting to a plurality of printed circuit boards, as in correspondence with a further preferred embodiment of the invention. 
         [0029]    In order to enable particularly simple and reliable coupling for the production of the composite assembly according to the invention, it is proposed according to a further preferred embodiment that the at least one frame or carrier element comprises a plurality of coupling elements that are each capable of being coupled or connected to at least one complementary coupling element of a respective printed circuit board. 
         [0030]    In order to simplify or facilitate subsequent treating and/or processing steps, it is, moreover, proposed that a plurality of printed circuit boards are each connected to the at least one frame or carrier element in a mutually spaced-apart relationship, as in correspondence with a further preferred embodiment of the invention. 
         [0031]    In order to reduce costs and achieve additional material savings, it is proposed according to a further preferred embodiment that the at least one frame or carrier element is configured to be reusable. 
         [0032]    In the context of reducing the costs involved in the production or processing of individual printed circuit boards, it is, moreover, proposed according to a further preferred embodiment that the at least one frame or carrier element is made of a material that is more cost-effective than the material used for the printed circuit boards. 
         [0033]    In order to achieve a reliable connection or coupling between the different printed circuit boards and the at least one frame or carrier element, it is proposed according to a further preferred embodiment that the printed circuit boards and the at least one frame or carrier element are connectable by gluing. 
         [0034]    In order to reduce the logistic expenditures involved in further mounting or when using printed circuit boards produced by the use of the composite assembly according to the invention, it is, moreover, proposed that printed circuit boards which, after processing, will be assigned to a common structural unit, or integrated or arranged in a common structural unit, are connected or coupled to at least one frame or carrier element, as in correspondence with a further preferred embodiment of the composite assembly according to the invention. As already indicated above, the supplying or logistic expenditures involved in the incorporation of different printed circuit boards into a component or electronic device will thus be strongly reduced. 
         [0035]    In accordance with the invention, the use of the method and/or composite assembly according to the invention for the, in particular, automated assemblage, mounting etc. of printed circuit boards is applied, thus enabling the achievement of advantages in terms of cost savings relating to reduced time expenditures in the production due to, in particular, the greatest possible elimination of conversion times when processing different printed circuit boards, as already pointed out above several times. When using a composite assembly comprised of different printed circuit boards and at least one frame or carrier element, it is, moreover, possible to achieve advantages in view of a reduction of the logistic expenditures involved in the installation of such different printed circuit boards in a common component or in an electronic device. 
     
    
     
       SHORT DESCRIPTION OF THE DRAWINGS  
         [0036]    In the following, the invention will be explained in more detail by way of exemplary embodiments schematically illustrated in the accompanying drawing. Therein,  FIG. 1  is a schematic top view of a composite assembly according to the invention, which is comprised of a plurality of different printed circuit boards and two frame or carrier elements, said composite assembly having been produced by the method according to the invention; and  FIGS. 2 to 7  are partially sectioned partial views of a connection of different printed circuit boards, or one printed circuit board each, to at least one frame or carrier element, with the elements to be connected partially having different thicknesses or, in general, different structures. 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0037]    In the illustration according to  FIG. 1 , a composite assembly is generally denoted by  1 , wherein a plurality of respectively differently configured printed circuit boards or printed circuit board elements  4 ,  5 ,  6  and  7  are coupled or connected to frame or carrier elements  2  and  3  provided on the outer edges of the composite assembly  1 . 
         [0038]    Besides the connection of the printed circuit boards  4  to  7  with the frame or carrier elements  2  and  3  located on the outer peripheries, for instance by gluing as will be discussed in detail below especially with reference to  FIGS. 2 to 7 , additional coupling elements may be provided, which are denoted by  8  for the printed circuit board  5  represented in  FIG. 1  and, for instance, are formed by substantially triangular protrusions projecting from a lateral edge or end face  9  of the printed circuit board  5 . The coupling elements  8  cooperate with respective recesses or depressions provided in the frame or carrier elements  2  and  3  and schematically indicated in  FIG. 1  by broken lines  10 . 
         [0039]    From  FIG. 1 , it is apparent that, besides a substantially linear configuration of the frame or carrier element  2 , the carrier element  3 , in particular, has an appropriately contoured design on its inner side facing the printed circuit boards  4  to  7 , which contoured design is adapted to the different sizes or dimensions of the printed circuit boards  4  to  7  to be coupled or connected thereto and is schematically denoted by  11 . By contrast, the frame or carrier element  3 , on its side facing away from the printed circuit boards  4  to  7 , is also designed to be linear such the composite assembly  1  formed by the frame or carrier elements  2  and  3  as well as the printed circuit boards  4  to  7  to be connected thereto has substantially linear outer edges in a transport or processing direction schematically indicated by  12 , which will be accordingly beneficial for the subsequent handling of the composite assembly  1 , or processing of the printed circuit boards  4  to  7 . 
         [0040]    In order to reduce any conversion work optionally required in consecutively arranged processing stations or assembly lines, the dimension of the composite assembly  1  can, moreover, be selected to remain substantially constant, in particular normally to the transport direction, even when providing or processing different printed circuit boards. 
         [0041]    The printed circuit boards  4  to  7  used in the schematic illustration according to  FIG. 1  have different sizes or different dimensions and can, for instance, be formed by printed circuit boards calling for different processing expenditures and/or the use of different processing devices in the context of subsequent processing steps. In this manner, mixed arrays of printed circuit boards  4  to  7  enabling the optimized utilization of, in particular, automated processing devices during subsequent processing steps can be used. 
         [0042]    After having been completed or processed, the different printed circuit boards  4  to  7  can additionally or alternatively be integrated in a common component or a common electronic device such that the logistics required for the provision of different printed circuit boards  4  to  7  when assembling such a component or device can be accordingly simplified. When providing a composite assembly comprising a plurality of printed circuit boards including, for instance, all printed circuit boards of a device or component to be produced or assembled, it will thus suffice, for the assemblage of a device, to provide a composite assembly  1  comprising all printed circuit boards  4  to  7  required for that device, while, in known embodiments, such different printed circuit boards have to be provided from a plurality of different formats or production processes involving accordingly increased logistic expenditures. 
         [0043]    Such a composite assembly  1  thus, for instance, provides a kit or set of printed circuit boards  4  to  7  to be, for instance, used when assembling a lighting device for a vehicle, comprising a headlamp and a back light. 
         [0044]    The different shapes or dimensions of the printed circuit boards  4  to  7  illustrated in  FIG. 1  merely constitute a schematic and exemplary illustration such that both the number and the shapes and/or the sizes of the printed circuit boards  4  to  7  to be used for the production of a composite assembly  1  can be selected as a function of the requirements and, in particular, so as to be different from the shapes or sizes and the number illustrated in  FIG. 1 . 
         [0045]    It may, moreover, optionally also suffice to provide but a single frame or carrier element  2  or  3 , which is, for instance, disposed along a side edge of the composite assembly  1 , that corresponds to the transport direction  12  for handling the composite assembly  1 . 
         [0046]    In a manner deviating from the illustration according to  FIG. 1 , it may, moreover, be provided that, in particular normally to the transport direction, adjacently arranged printed circuit boards are connected to each other and only on their outer peripheries or edges as are denoted by  9  for the printed circuit board  5  are connected to at least one contiguous frame or carrier element  3 . 
         [0047]      FIGS. 2 to 7 , partially in section, depict different ways to connect contiguously arranged printed circuit boards or a printed circuit board and a contiguous frame or carrier element. For reasons of simplification of the description or nomenclature, the parts illustrated in  FIGS. 2 to 7  and to be mutually connected will partially be generally referred to as elements. Such an element can be comprised of a printed circuit board or a frame or carrier element as indicated above, wherein, in order to further simplify the description, the element each indicated on the right-hand side in the individual illustrations according to  FIGS. 2 to 7  constitutes a frame or carrier element, while an element to be connected thereto is to be comprised of a printed circuit board. 
         [0048]    In the embodiment according to  FIG. 2 , an adhesive  23  is applied to an end side or end face  21  of a printed circuit board  22  by the aid of a dispenser (not illustrated) or a dispensing means (not illustrated). In order to establish a connection, the printed circuit board  22  and the frame or carrier element  24  to be connected thereto are moved towards each other in the sense of arrows  25  and  26  so as to provide a connection in the region of the end faces  21  and  27  via said adhesive  23 . 
         [0049]    In the modified embodiment illustrated in  FIG. 3 , both a printed circuit board  31  and a frame or carrier element  32  are placed on a plate or support  33 , while an adhesive  34  is introduced into the gap  38  formed between the end faces  36  and  37  by the aid of a dispensing means  35 . 
         [0050]    Instead of the dispenser or dispensing means  35  for the adhesive, ink-jet printing may, for instance, also be provided to introduce the adhesive  34  into the gap  38 . 
         [0051]    In the embodiment according to  FIG. 4 , a printed circuit board  41  and a frame or carrier element  42  are again supported on a support device or support plate  43 , wherein an opening or gap  44  is provided in the support plate  43  in the region of the elements  41  and  42  to be connected to each other. An adhesive  46  is introduced between the end faces  47  and  48  of the elements  41  and  42  via said gap  44  by the aid of a dispensing means  45  so as to establish a connection between the individual elements. 
         [0052]    From the illustrations according to  FIGS. 2 to 4  it is apparent that the elements to be connected have, for instance, different thicknesses or vertical extensions or, in general, different structures, e.g. due to different numbers of printed circuit board plies or layers. 
         [0053]    In the embodiments according to  FIGS. 5 and 6 , the application of an adhesive is each effected by screen-printing, wherein a printed circuit board  51  and a frame or carrier element  52  are supported or placed on a support plate  53  in the configuration according to  FIG. 5 . Considering the different heights of the elements  51  and  52 , a template  54  is used, which is configured to be offset in the region of the gap  55  formed between the elements  51  and  52  and into which the adhesive is to be introduced, as is indicated by step  56 . Adhesive  58  is introduced into the gap  55  in the offset region  56  by the aid of a doctor blade  57  to connect the elements  51  and  52 . 
         [0054]    In order to avoid the use of an offset template  54  as illustrated in  FIG. 5 , the embodiment according to  FIG. 6  uses an appropriately contoured support plate  63  for supporting a printed circuit board  61  and the frame or carrier elements  62  to be connected thereto on both sides, which support plate, as indicated by  64 , is designed to be accordingly offset in the region of the printed circuit board  61 , which has a large height or thickness. In the embodiment according to  FIG. 6 , a substantially plane surface of the elements  61  and  62  to be connected to each other is thus provided so as to enable the use of an accordingly simple or standard template  65 . Adhesive  68 , via passage openings  66 , is again introduced into the gap  69  formed between the elements  61  and  62  to be connected, using a doctor blade  67 . 
         [0055]    In the further modified embodiment according to  FIG. 7 , a connection between a printed circuit board  71  and a frame or carrier element  72  is indicated, with both of the elements  71  and  72  being arranged on a plane support plate  73 . By configuring the frame or carrier element  72  to comprise an offset region  74  on its upper side for adaptation to a reduced thickness or height of the printed circuit board  71 , a standard template  75  may be substantially employed, wherein an adhesive  77 , via an interruption or opening  79  in the template  75 , is introduced into the gap  78  between the elements  71  and  72  to be connected, again by using a doctor blade  76 . 
         [0056]    Bearing in mind the usually automated processing and comparatively small dimensions of printed circuit boards connected to frame or carrier elements  2  and  3  to form a composite assembly  1 , it is to be anticipated that an elevated number of printed circuit boards  4  to  7  will be used in most cases relative to the illustrated embodiments. The printed circuit boards  4  to  7  combined to a composite assembly  1  are arranged in a spaced-apart relationship in order to enable the proper and separate treatment or processing of the individual printed circuit boards  4  to  7 . 
         [0057]    In order to enable further cost savings, it may, moreover, be provided that the material of the frame or carrier elements  2 ,  3 ,  24 ,  32 ,  42 ,  52 ,  62  or  72  is usually comprised of a material that is more cost-effective than the material used for the printed circuit boards  4  to  7 ,  22 ,  31 ,  41 ,  51 ,  61  or  71  to be connected thereto. 
         [0058]    For a further cost reduction, it may, moreover, be provided that the frame or carrier elements  2 ,  3 ,  24 ,  32 ,  42 ,  52 ,  62  or  72  are configured to be reusable.