Source: http://www.google.de/patents/US4674175
Timestamp: 2013-05-18 16:47:22
Document Index: 184225226

Matched Legal Cases: ['art 6', 'art 6', 'art 6', 'art 6', 'art 3', 'art 6', 'art 6', 'art 7', 'art 7', 'arts 3']

Patent US4674175 - Process for manufacturing electronic modules for microcircuit cards - Google PatenteSuche Bilder Maps Play YouTube News Gmail Drive Mehr » Erweiterte Patentsuche | Webprotokoll | Anmelden Erweiterte Patentsuche PatenteThe invention relates to microcircuit cards, used for electronic transactions or other purposes, and concerns a process for mass producing electronic modules to be used in these cards and the modules obtained according to this process. According to the invention, there are fabricated, on the one hand,...http://www.google.de/patents/US4674175?utm_source=gb-gplus-sharePatent US4674175 - Process for manufacturing electronic modules for microcircuit cards Ver�ffentlichungsnummerUS4674175 APublikationstypErteilung Anmeldenummer06/846,936 Ver�ffentlichungsdatum23. Juni 1987Eingetragen1. Apr. 1986 Priorit�tsdatum2. Apr. 1985Auch ver�ffentlicht unterEP0197438A1EP0197438B1EP0197438B2 ErfinderJean-Marcel StampfliUrspr�nglich Bevollm�chtigterEta Sa Fabrique D'EbauchesEta Sa Fabriques D'Ebauches Schild-Rust-Strasse 17 Ch-2540 Granges/Switzerland US-Klassifikation29/827438/12329/835283/86438/124425/DIG.130235/492235/488257/E23.12529/856283/72257/E23.6429/841Internationale KlassifikationH01L23/498H01L21/60H01L23/31B42D15/10G06K19/077 UnternehmensklassifikationH01L2224/49171H01L2924/01079G06K19/07743H01L2224/48472H01L24/48H01L2924/14H01L2224/48245G06K19/07745H01L2224/48228H01L23/3121H01L2924/01057G06K19/07747H01L2924/01014H01L23/49855H01L2924/0102H01L24/49 Europ�ische KlassifikationG06K 19/077M2G06K 19/077MH01L 23/498KG06K 19/077KH01L 23/31H2ReferenzenPatentzitate (5) Referenziert von (36)Externe LinksUSPTO USPTO-Zuordnung EspacenetProcess for manufacturing electronic modules for microcircuit cardsUS 4674175 A Zusammenfassung The invention relates to microcircuit cards, used for electronic transactions or other purposes, and concerns a process for mass producing electronic modules to be used in these cards and the modules obtained according to this process. According to the invention, there are fabricated, on the one hand, a metal grid with a plurality of openings into which there penetrate tongues attached to the frame of this grid and intended to form the modules' contact areas, and, on the other hand, pellets of plastics material which have a generally flat front face, a rear face in which there is a hollow and, between this hollow and the front face, windows so arranged that they can be positioned opposite the grid tongues. Then a pellet is attached by its front face to the tongues in each opening, an integrated circuit chip is bonded to the bottom of the hollow in each pellet in such a way that its rear face is directed towards the grid, the connecting terminals of the chip are connected by means of conductors to the tongues to which the pellet is attached, said conductors being seated in the hollow in the pellet and passing through the said windows, and the hollow and the windows are filled with an insulating, hardenable and adhesive material. There then remains only to detach the modules from the grid by cutting the tongues around each pellet.
I claim: 1. A process for fabricating electronic modules for microcircuit cards, each module comprising an integrated circuit chip with a front face provided with connecting terminals and a rear face and a set of metal contact areas each connected to one of the chip's connecting terminals, the process comprising the following steps: providing a metal grid comprising a plurality of identical openings defined by a frame and, in each opening, a set of tongues attached to the frame for forming the contact areas of a module; providing a series of pellets of synthetic material, these being smaller than the openings in the grid and each one having a generally flat front face, a rear face in which there is located a hollow and, between this hollow and said front face, windows so arranged that they can be positioned opposite the tongues respectively of one of said sets of tongues; attaching each said pellet of said series by its front face to one of said sets of tongues in such a way that said windows are actually opposite these tongues; attaching an integrated circuit chip to the bottom of said hollow in each said attached pellet so that the rear face of said integrated circuit is directed towards the said grid; connecting said chip's connecting terminals to said tongues to which said pellet is attached by means of conductors located in the hollow in said pellet and passing through said windows; and filling said hollow and said windows in each said pellet with an electrically insulating, hardenable, adhesive material.
2. A process according to claim 1, wherein to fix a chip inside a pellet and connect its connecting terminals to said tongues in said grid, said chip is first bonded to the bottom of said hollow in said pellet and then each said conductor is soldered at one end to one of said chip's connecting terminals and, at the other end, to the corresponding tongue.
FIGS. 2.sub.a and 2.sub.b are views respectively of the back and front of a pellet of plastics material which is also manufactured according to this same method;
FIG. 2.sub.c is a sectional view of the pellet along the broken line II-II to be seen in FIG. 2.sub.a ;
FIG. 3 shows how pellets such as that of FIGS. 2.sub.a and 2.sub.c are attached to the tongues in the grid of FIG. 1, these being intended to form the modules' contact areas;
FIG. 5.sub.a is a partial plan view of a tongue of FIG. 4, showing better the shape of the lugs;
FIG. 5.sub.b shows, viewed from above, the tongue of FIG. 5.sub.a when the lugs are folded over at right angles;
FIG. 6.sub.a is a partial rear view of a pellet, with an integrated circuit chip and the connections between the chip terminals and the grid tongues after they have been effected;
FIG. 6.sub.b is a sectional view along the broken line VI-VI to be seen in FIG. 6.sub.a ;
FIG. 7 is a sectional view similar to that of FIG. 6.sub.b but showing a completed module;
FIGS. 10, 11.sub.a, 11.sub.b, 11.sub.c, 12, 13.sub.a, 13.sub.b, and 14 are views corresponding respectively to those in FIGS. 1, 2.sub.a, 2.sub.b, 2.sub.c, 3, 6.sub.a, 6.sub.b, and 7 but illustrating the second method of implementing the invention; and
DESCRIPTION OF THE PREFERRED EMBODIMENTS To produce electronic modules in accordance with the method of implementing the process according to the invention which we have chosen to describe first, the manufacturer begins by fabricating a metal grid 1 in the form of a strip, as is shown partially in FIG. 1, and pellets 6 of synthetic material, as shown in FIGS. 2.sub.a, 2.sub.b and 2.sub.c.
Each pellet 6 is in the form of a disk which is slightly smaller than the openings 2 in the grid 1 and which has one essentially flat face 6.sub.a and a circular central part 6.sub.c which is thicker than the peripheral part 6.sub.d which surrounds it. For example, the diameter of the central part 6.sub.c can be about half that of the disk and its thickness approximately one and a half times that of the peripheral part 6.sub.d.
As FIG. 2.sub.b shows, the pellet has shallow channels 7 in its flat or front face 6.sub.a, these being provided to receive the tongues 3 from any one of the openings in the grid.
Furthermore, as may be seen from FIGS. 2.sub.a and 2.sub.c, the pellet also has, in its rear face 6.sub.b, a hollow 8 formed by a central space 8.sub.a and a series of radial grooves 8.sub.b which extend from this space to the windows 9 which are provided between the hollow and the front face 6.sub.a of the pellet and which each open into one of the channels 7.
Once the manufacturer has at his disposal the grid 1 and pellets 6, each of these pellets is attached by its front face 6.sub.a to the tongues 3 in an opening 2 in the grid, in such a way that the tongues are located in the pellet channels 7 provided to receive them, as is shown in FIG. 3.
For a reason which will become clear below it is advantageous to give the sides of these lugs an inwardly curving or "V" shape, as FIG. 5.sub.a shows, so that they are narrower at the centre than at the ends.
After the grid has been cut off the lugs are folded over at an angle of 90 FIG. 5.sub.b.
Therefore, after the pellets have been attached to the grid, the next step is to adhere an integrated circuit chip 12 to the seat 10 reserved for this purpose in each pellet (see FIGS. 6.sub.a and 6.sub.b), obviously in such a way that the chip's front face provided with connecting terminals 13 is located on the opposite side of the grid. Each of these terminals is then connected to a tongue 3, by sliding a conductor 14 into a groove 8.sub.b and the corresponding opening 9 and ensuring that no part of the conductor projects from the hollow 8.
Once again the manufacturer begins be fabricating, on the one hand, a grid 1' in the form of a strip such as is shown in FIG. 10 and, on the other hand, pellets 6' of synthetic material like the one shown respectively from the rear and from the front in FIGS. 11.sub.a and 11.sub.b and, in FIGS. 11.sub.c, in section along the broken line XI--XI to be seen in FIG. 11.sub.a.
The grid 1' also has perforations 5' to drive it, openings 2' and tongues 3' extending inside the openings, but in each group of tongues there is one which has a special shape. This tongue comprises a main, straight part 3.sub.a ' which crosses the centre of the opening in which it is located and which is attached by its two ends to the frame 4' of the grid, and a branch 3.sub.b ' which extends from this central part to the frame to which it is also attached and which replaces one of the tongues 3 of the grid of FIG. 1. As for the other tongues 3', they have the same shape and are in the same position as before.
Furthermore, each pellet is still in the form of a disk with a practically flat front face 6.sub.a ', a peripheral part 6.sub.d ' which is thinner than the central part 6.sub.c ' and a hollow 8' in this central part.
However, if the pellet 6' of FIGS. 11.sub.a to 11.sub.c is compared with that, 6, of FIGS. 2.sub.a to 2.sub.c it will be seen that there are three differences.
The first, which concerns the channels in the front faces of the pellets, is imperative. It is in fact obvious that one of the channels 7' must also comprise a main part 7.sub.a ' and a branch 7.sub.b ' so that their configuration is adapted to that of the tongues 3' in the grid 1'.
The second is that the integrated circuit chip cavity 10 in the pellet has been replaced by an opening 10' which opens into the main part 7.sub.a ' of the special channel 7 and the third stems from the fact that the hollow 8' in the pellet 6' is not exactly the same shape as the one, 8, in the pellet 6, considering that one of the windows 9' opens into the main part of the channel in question. In reality, this last difference is unimportant as it could very easily be done away with by causing this window to open into the branch 7.sub.b '.
As in the first method of implementation, the next stages consist in fixing the pellets 6' onto the grid 1' (see FIG. 12), preferably using ultrasonic soldering, in adhering the chips 12' to the seats 10' reserved for them, in joining the connecting terminals 13' of the chips to the tongues 3' by means of the conductors 14', according to either one of the methods indicated above (see FIGS. 13.sub.a and 13.sub.b, FIG. 13.sub.b being a sectional view along the broken line XIII--XIII to be seen in FIG. 13.sub.a) and in filling the hollows 8' with an insulating, adhesive material 15' (see FIG. 14). Here, however, the chips 12' are adhered by means of a conductive adhesive to the main parts 3.sub.a ' of the special tongues 3' which, of course, are connected to the earth terminals.
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