PL81630B1 - - Google Patents
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- PL81630B1 PL81630B1 PL1971147758A PL14775871A PL81630B1 PL 81630 B1 PL81630 B1 PL 81630B1 PL 1971147758 A PL1971147758 A PL 1971147758A PL 14775871 A PL14775871 A PL 14775871A PL 81630 B1 PL81630 B1 PL 81630B1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
- H01R12/714—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00013—Fully indexed content
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/64—Means for preventing incorrect coupling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
- Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
- Y10T29/4922—Contact or terminal manufacturing by assembling plural parts with molding of insulation
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- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
- Push-Button Switches (AREA)
Abstract
Description
Uprawniony z patentu: International Computers Limited, Letchworth (Wielka Brytania) Sposób wytwarzania sprezynujacego lacznika elektrycznego do mikroobwodów oraz lacznik wytwarzany tym sposobem Przedmiotem wynalazku jest sposób wytwarzania sprezynujacego lacznika elektrycznego do mikro¬ obwodów oraz lacznik wytwarzany tym sposo¬ bem.Postep w technice produkcji mikroobwodów pozwolil na znaczne zmniejszenie wymiarów po¬ szczególnych elementów mikroobwodów, duza ilosc obwodów umieszcza sie w bardzo malej objetosci, w tak zwanym pakiecie ale wtedy trzeba wykonac odpowiednio duza ilosc polaczen takiego pakietu mikroobwodów. Jedna z trudnosci wykonania ta¬ kich polaczen elektrycznych jest to, ze wymiary oraz tolerancje polaczen pakietów mikroobwodów sa krancowo male i dlatego polaczenia te sa trudne do wykonania technika konwencjonalna.Konieczne jest równiez aby pakiet mikroobwo¬ dów byl latwo wymienialny, jezeli jednak mikro- obwód ma duza ilosc trwalych polaczen z obwo¬ dami zewnetrznymi to czas i wysilek potrzebny do rozlaczania i ponownego wykonania polaczen staje sie szczególnie dlugi i kosztowny. Trudnosc wymiany pakietów mikroobwodów, które sa przy- lutowywane do obwodów zewnetrznych, polega na tym, ze lut musi byc nastejtoiie bardzo starannie usumfiety z kazdego przewodu.W konwencjonalnych elementach elektrycznych styk elektryczny miedzy tymi elementami naj¬ czesciej zapewniony jest przez sprezyny wyko¬ nane z materialu przewodzacego elektrycznie za¬ pracowane w materiale izolacyjnym. Koniec spre- 2 zyny utrzymywany jest w styku z elektrycznie przewodzaca czescia elementu wtedy, gdy na co najmniej jeden z elementów wywarty jest nacisk a sprezyna zostaje scisnieta zapewniajac w ten 5 sposób polaczenie elektryczne miedzy elementami.Jednakze wraz z rozwojem mikroobwodów i wy¬ mogiem dokonania w urzadzeniu mikroobwodowym polaczenia elektrycznego wielkiej ilosci przewodów o bardzo malych wymiarach stwierdzono, ze do- io tychczas stosowane styki sprezynowe nielatwo poddaja sie miniaturyzacji. W wielu przypadkach zachodzi wiec koniecznosc montowania urzadzen mikroobwodowych na plytkach nosnych o znacznie wiekszych wymiarach, aby urzadzenie dalo sie 15 dostosowac do konwencjonalnych styków i laczni¬ ków elektrycznych, co zwieksza jednak wymiary oraz koszt pakietów mikroobwodów a wlasciwie przekresla zalety techniki miniaturyzacji.Celem wynalazku jest usuniecie powyzszych 20 niedogodnosci.Zadanie techniczne prowadzace do tego celu po¬ lega na opracowaniu sposobu wykonania sprezy¬ nujacego lacznika do mikroobwodów oraz latwego do montazu i demontazu mikroukladów, wyko- 25 nanegio tym sposobem.Zadanie to rozwiazano dzieki temu, ze wedlug wynalazku opracowany zostal sposób wykonania sprezynujacego lacznika elektrycznego mikroobwo¬ dów przez uzycie metalowej cienkiej plytki ma- 30 jacej ksztalt ramki, której dluzsze boki sa wza- SI 63081630 3 4 jemnie polaczone równomiernie rozmieszczonymi, równoleglymi czlonami paskowymi, po czym z tych ksztaltek tworzy sie stos ukladajac je jedna na druga, na przemian z przekladkami odleglosciowymi o takim samym ksztalcie jak ksztaltki metalowe ale bez czlonów paskowych, nastepnie przestrzen miedzy bokami ksztaltek stosu wypelnia sie cieklym zestalajacym sie elastomeTycznym ma¬ terialem izolacyjnym, po zestaleniu materialu, na¬ stepuje usuniecie boków ramek.Zgodnie z drugim zadaniem wynalazku opra¬ cowany zostal lacznik elektryczny wykonywany tym sposobem; lacznik zawiera wiele wydluzonych giet¬ kich sprezynujacych czlonów przewodzacych osadzo¬ nych w bloku z elastomerycznego materialu izolacyj¬ nego* przy czym kazdy z czlonów przewodzacych miesci sie miedzy powierzchniami tego bloku, a konce czlonów^ przewodzacych wystaja z obsza¬ rów .powierzchniowych czlonu. Lacznik taki two¬ rzy szereg przewodzacych sciezek miedzy dwoma mikroobwodami, z których kazdy znajduje sie w styku z odpowiednia czescia jednego z dwu ob¬ szarów powierzchniowych. Najkorzystniej te ob¬ szary powierzchniowe sa równoleglymi, przeciw¬ stawnymi sobie powierzchniami czolowymi plyty tworzacej blok. Do zapewnienia dobrego styku wystarcza stosunkowo mala sila dociskajaca. Naj¬ korzystniej jest, gdy krance czlonów przewodza¬ cych wystaja nieco z powierzchni bloku. Krance wystajace moga byc wykonane z materialu róz¬ niacego sie od materialu czlonów sprezynujacych na przyklad z materialu posredniego, od którego wymaga sie dobrego powiazania, oraz z warstwy krancowej wykonanej z metalu szlachetnego.Przedmiot wynalazku przedstawiony jest w przy¬ kladzie wykonania na rysunku, na którym fig. 1 przedstawia czlon sprezynujacy wygiety pod katem prostym, fig. 2 — czlon sprezynujacy majacy ksztalt krzywoliniowy, fig. 3 — czlon sprezynujacy osa¬ dzony w materiale elastomerycznym, fig. 4 — laczniki elektryczne w praktycznym wykonaniu, fig. 5 — czlon sprezynujacy jako czesc ramki, fig. 6 — ramke metalowa, która sluzy jako od- stepnlk, fig. 7 —r stos zawierajacy na przemian ulozone elementy przedstawione na fig. 5 i 6, fig. 8 — inne wykonanie lacznika, a fig. 9 — przedstawia lacznik z fig. 8 w zastosowaniu.Sposób wytwarzania sprezynujacego lacznika elektrycznego do mikroobwodów przedstawionego na fig. 3 jest nastepujacy. Konwencjonalna techni¬ ka trawienia chemicznego wytwarza sie szablon w postaci cienkiej metalowej plytki majacej ksztalt ramki 32 (fig. 5) z wielka iloscia sprezynujacych czlonów 10. W kazdym rogu ramki wykonuje sie ?twór lub wyciecie 36 dla nastepnego dokladnego zlozenia i ustawienia ramek. W procesie chemicz¬ nego trawienia w jednej operacji wykonuje sie duza ilosc ramek, przy czym wszystkie maja do¬ kladnie jednakowe wymiary. Nastepnie na ram¬ ce 32 ustawia sie przedstawiony na fig. 6 czlon odleglosciowy czyli odstepnik 33, po czym buduje sie stos, który zawiera na przemian ramki 32 i czlony odleglosciowe 33, przy czym grubosc czlo- „ nów odleglosciowych dokladnie okresla odstep mie- dzy kazdymi dwiema ramkami 32. Caly stos sciska sie nastepnie miedzy koncowymi plytkami 34 i 35 przy pomocy kolków 37, tak jak to Jest przedsta¬ wione na fig. 7, przez co tworzy sie wneke za¬ wierajaca duza ilosc dokladnie rozmieszczonych 5 czlonów sprezynujacych 10. Wneke wypelnia sie odpowiednim cieklym elastomerem, którym na przyklad moze byc guma silikonowa.Z kolei elastomer polimeryzuje sie, po czym usuwa sie koncowe plytki 34 i 35 oraz czlony od¬ leglosciowe to jest odstepniki 33. Nastepnie techni¬ ka trawienia chemicznego usuwa sie ramki 32 tak, ze w bloku spolimeryzowanego elastomeru pozo¬ staja tylko czlony sprezynujace 10 precyzyjnie na stale rozmieszczone w materiale elastomerycz¬ nym 21. Powierzchnie materialu 21 w razie po¬ trzeby poddaje sie procesowi szlifowania w celu poprawienia jej plaskosci.W ten sposób wytworzony zostaje sprezynujacy elektryczny lacznik do mikroobwodów 1, w któ¬ rym miedzy jedna strona arkusza gietkiego ela- stomerycznego materialu, a jego druga strona znaj¬ duje sie duza ilosc sciezek przewodzacych elek¬ trycznie wzajemnie odizolowanych. W ten sposób wytworzony jest wiec plaski lacznik 1, który ma anizotropowa charakterystyke przewodnictwa, to jest w jednym kierunku posiada wysoki stopien przewodnosci, natomiast w kierunku ortogenalnym do tegoz kierunku posiada niski, wzglednie pomi- jalny stopien przewodnosci. W wyniku takich wlasciwosci mikroobwód majacy styki wzglednie przewodzace powierzchnie stykowe stykajace sie z pewna liczba sprezynujacych czlonów 10 umiesz¬ czonych w elastomerze 21 jest polaczony elektrycz¬ nie z obwodami zewnetrznymi, wykonanymi na przyklad jako obwody drukowane, zaopatrzone dla zapewnienia wzajemnego polaczenia,' w styki wzglednie przewodzace powierzchnie stykowe o takiej samej geometrii rozmieszczenia jak mikro¬ obwód. Polaczenie elektryczne miedzy mikroobwó- dem a plytka z obwodami drukowanymi uzyskuje sie po prostu przez umieszczenie sprezynujacego lacznika 1 pomiedzy mikroobwodem a plytka z obwodami drukowanymi, oraz poddanie tego ze¬ stawu malemu naciskowi w celu zapewnienia nie¬ zawodnych polaczen elektrycznych.Nawiazujac do fig. 1 sprezynujacy czlon 10 wedlug wynalazku ma odpowiednie na górze 1 na dole powierzchnie stykowe czolowe 11 i 12. Spre¬ zynujacy czlon 10 jest utworzony z przewodzacego elektrycznie materialu sprezystego, takiego jak na przyklad braz fosforowy. Inne wykonanie czlonu sprezynujacego jest przedstawione na fig. 2, czlon 40 posiada dwie przeciwlegle powierzchnie sty¬ kowe, czolowe 41 i 42. Sprezynujace czlony 10 i 40 maja wymiary przekroju rzedu 25 |ji a dlugosc ich siega rzedu 2 mm. Na fig. 3 przedstawiony jest sprezynujacy lacznik elektryczny 1, w którym za¬ stosowana jest duza ilosc czlonów sprezynujacycfti takich jak 10 lub 40. \Kazdy czlon sprezynujacy It) jest osadzony w elastomerycznym materiale 21 który zarówno fizycznie jak i elektrycznie wzajem¬ nie oddziela kazdy czlon 10 od siebie tworzac lacz¬ nik 1. Elastomeryczny material 21 w celu popra¬ wienia plaskosci jego powierzchni szlifuje sie i pod¬ czas tego procesu powierzchnie stykowe 11, 12 20 25 30 35 40 45 50 55 60 .81630 5 sprezynujacych czlonów 10 wglebiaja sie, jak to jest pokazane, nieco ponizej powierzchni mate¬ rialu 21. Korzystnie przeciwstawne stykowe po¬ wierzchnie czolowe 11 i 12 pokrywa sie bezpra- dowo innym materialem przewodzacym i tworzy sie jak to przedstawiono na fig. 3, styki 13, 1$, 19, 20, 22 i 23. Powierzchnie stykowe przewodza¬ cego elementu 14 mikroobwodu 15 sa tak roz¬ mieszczone ze tworza styk elektryczny ze styka¬ mi 13, 18 i 19.Podobnie element przewodzacy 16 jest umiesz¬ czony tak, ze: laczy elektrycznie styki 20, 22 1 23 z nie pokazanym na rysunku zewnetrznym mikro- óbwodem elektrycznym. Element przewodzacy 16 jest na przyklad przewodzaca czescia plytki z ob¬ wodami drukowanymi. W ten sposób przez umiesz¬ czenie elementu przewodzacego 16 na sztywnym podlozu oraz przez przylozenia sily, na przyklad o wartosci 50 gramów, do mikroobwodu 15 utwo¬ rzone jest przy pomocy sprezystego lacznika 1 niezawodne sprezynujace, .;polaczenie elektryczne miedzy powierzchnia styku przewodzacego ele¬ mentu 14 oraz elementem przewodzacym 16. Na¬ lezy podkreslic, ze tak uksztaltowany lacznik 1 nie musi byc poddawany dokladnej kontroli od¬ nosnie wysokosci znajdujacych sie w nim czesci przewodzacych elektrycznie, jak to ma miejsce wówczas, gdy jako czlony laczace elektrycznie stosowane sa elementy konwencjonalne, zagadnienie to znika, poniewaz lacznik 1 jest w pelni sprezynu¬ jacy: Równiez dlatego, ze zadna czesc sprezystego lacznika 1 nie jest zwiazana lub w staly sposób polaczona z przewodzacymi powierzchniami styko- -wymi elementów 14 i 16 wymiana poszczególnego •podzespolu takiego jak na przyklad mikroobwo- . du 15 jest latwo realizowana przez usuniecie pod¬ zespolu ze stanu styku z lacznikiem 1.Na fig. 3 element przewodzacy 16 przedstawiony jest w styku z trzema stykami 20, 22, 23 sprezy¬ nujacych czlonów, jednak oczywiscie element prze¬ wodzacy 16 moze byc W styku z wieksza liczba styków, przykladowo z piecioma lub szescioma, bez wplywu na jakosc polaczenia istniejacego mie¬ dzy przewodnikiem 16 oraz powierzchnia styku przewodzacego elementu 14. Przedstawione jako majace ksztalt kopul styki 14, 18 i 19 oraz 20, 22 i 23 mozna równiez zrobic jako plaskie tak, ze styki te leza na tej samej powierzchni co i po¬ wierzchnia elastomerycznego materialu 21, a wtedy kopuly tworzace styki staja sie zbyteczne.Nawiazujac do fig. 4 przedstawiajacej zastosowa¬ nie sprezynujacego lacznika elektrycznego 1 w ze¬ spole elektrycznym na chlodzonym woda radia¬ torze 25 zamontowany jest mikroobwód 15 ze sprezynujacym lacznikiem elektrycznym 1 zamon¬ towanym na obwodzie 15. Plytka z obwodami dru¬ kowanymi jest przy pomocy kolków ustalaja¬ cych 26 i 27 odpowiednio usytuowana w stosunku do róznych mikroobwodów 15, a trzpienie z na¬ kretkami 28 i 29 sluza do utrzymywania plytki z obwodami drukowanymi w styku ze sprezynu¬ jacym lacznikiem 1 przez wywieranie na niego stalego nacisku. Koncówki 30 na plytce z obwoda¬ mi drukowanymi moga byc wówczas podlaczone 6 do sprezynujacego elektrycznego lacznika 1 przy pomocy zapewniajacych wzajemne polaczenie ele¬ mentów 31 na plytce z obwodami drukowanymi.Mimo, ze czlon sprezynujacy 10 przedstawiony zo- / 5 stal na fig. li fig. 2 w dwóch róznych posta¬ ciach nalezy podkreslic, iz te postacie sa jedynie przykladowymi i ze moga byc zastosowane inne . ksztalty. Jednakze w kazdym indywidualnym przy¬ padka sam czlon sprezynujacy 10 lub 40 nie ma 10 wystarczajacej wytrzymalosci aby mógl podtrzy- \ mywac element mikroobwodu 15 i dopiero przez osadzenie w materiale elastomerycznym 21 zostaje stworzona wystarczajaca wytrzymalosc pewnej ilosci takich sprezynujacych czlonów 10. ,-15 Innym przykladem realizacji wynalazku lest za¬ stopowanie na sprezysty czlon materialu porowa¬ tego. W porach, osadza sie selektywnie odpowiednie . metale 'tworzac wielka ilosc: przewodzacych elek¬ trycznie sciezek od jednej powieractai sprezystego 20 czlonu do jego drugiej powierzchni.Nawiazujac do fig. 3 nalezy zauwazyc, ze frag¬ menty styków 13, 18 i dalszych, tworza kopuly, wystajace nieco poza powierzchnie bloku 21 ma¬ terialu elastomerycznego, có ulatwia uzyskiwanie 25 odpowiedniego nacisku przez fragmenty styków elementów przewodzacych bez nadmiernego obcia¬ zenia sasiadujacych elementów obwodu co moglo¬ by powodowac przemieszczanie bloku elastomery-. . cznego, szczególnie wtedy, gdy przewodzace obszary 30 stykowe skojarzonego mikroobwodu i/lub plytki z obwodami leza na tej samej plaszczyznie.Elastomeryczny material, w praktyce, nie daje sie latwo przemieszczac, poniewaz miekki mate¬ rial posiada dosc wysoki wspólczynnik tarcia, w 35 wyniku czego powierzchnia czolowa bloku znaj¬ dujaca sie w styku z elementem obwodu ma sklon¬ nosc do przeciwstawiania sie bocznym przemiesz¬ czeniom w stosunku do powierzchni czolowej elementu. Tendencja ta wzraslta wraz ze wzrostem 40 nacisku w wyniku czego praktyczne naciski przy¬ kladane do elementów moga wytwarzac niewielkie wybrzuszenia na krancach bloku lacznika 1. Ko¬ rzystne jest aby konce osadzonych w bloku czlo¬ nów przewodzacych wystawaly* nieco z powierzchni 45 tego bloku, bowiem sily przylozone do elementów obwodu powoduja wówczas jedynie powstanie skutecznych nacisków miedzy osadzonymi czlonami, oraz przewodzacymi obszarami elementów obwodu.Korzystne jest, jak to jest pokazane ha fig. 8, 50 aby kraniec styku posiadal zewnetrzna warstwe 71 wykonana z metalu szlachetnego, na przyklad ze zlota. W zaleznosci od materialu uzytego na osa¬ dzone w elastomerycznym bloku czlony przewo¬ dzace 72 moze byc niezbedne zastosowanie po- 55 sredniego fragmentu w postaci warstw 70 z inne¬ go przewodzacego materialu, aby w ten sposób zapewnic dobre wzajemne powiazanie materialów.Te posrednie warstwy 70 tworza wystajace kon¬ ce czlonów przewodzacych 72. Blok 21 moze miec 60 czlony przewodzace 72 wykonane na przyklad z miedzi berylowej lub stopu fosforobromowego, zgiete w ksztalcie litery V dla zapewnienia wr~ maganej sprezystosci w tym kierunku w jakim przykladany jest nacisk. Konce czlonów 72 sa 65 poczatkowo tak umieszczone aby byly w zasa-81630 7 dzie na takim samym poziomie jaki maja plasz¬ czyzny czolowe 79 i 79a. Nastepnie nad koncami cztonów 72 formuje sie warstwe 70 na przyklad z miedzi przy pomocy procesu elektrolitycznego, w procesie osadzania miedziana warstwa 70 two¬ rzy kopule nad kazdym koncem czlonu 72. Na¬ stepnie kolejna warstwe 71, na przyklad ze zlota, w podobnym procesie osadza sie na kopulach miedzianych 70, tak ze warstwy zlota tworzace styk wystaja z czolowych powierzchni 79 i 79a.Nawiazujac do fig. 9, która ilustruje przyklad zamontowania miedzy para elementów 74 i 75 mikroobwodów posiadajacych przewodzace obsza¬ ry 76 i 77, bloku stykowego podobnego do tego z fig. 8 oraz przylozenie nacisku w celu uzyskania wzajemnego styku, widac, ze oprócz powstania wybrzuszenia na brzegach bloku 21 w przestrzeni miedzy powierzchniami 74 i 74a elementów 74 i 75 oraz wybrzuszen na poczatkowo plaskich powierzch¬ niach 79, 79a bloku, elastomeryczny material bloku nie ulega przemieszczeniu. Nalezy równiez pod¬ kreslic, ze poniewaz przy montazu poczatkowo docisk miedzy powierzchniami 79, 79a bloku oraz powierzchniami 74, 74a elementów nie wystepuje, to przed przylozeniem nacisku wystepuje tylko niewielkie tarcie, które zapobiega niewielkiemu wzglednemu przemieszczeniu miedzy blokiem oraz elementami 74 i 75. Skuteczny styk elektryczny miedzy przewodzacymi powierzchniami 76 i 77 jest zapewniony w -trojaki sposób.Po pierwsze poszczególne naciski miedzy two¬ rzacymi styk koncami czlonów 72 oraz odpo¬ wiednimi obszarami 76 i 77 sa malo zalezne od odpornosci na sciskanie elastomerycznego mate¬ rialu bloku 21.Po drugie pokrycie materialem szlachetnym kon¬ ców czlonów 72 zapewnia dalsze polepszenie styku, oraz po trzecie kazde tendencje do bocznego prze¬ mieszczenia bloku 21 wywoluja dzialanie docisko¬ we odpowiednio miedzy tworzacymi styk koncami czlonów 72 oraz przewodzacymi obszarami 76 i 77.Na fig. 9 pokazane jest, ze przy zastosowaniu tego rodzaju zestawu bloku stykowego dopuszczal¬ ny jest pewien stopien tolerancji w usytuowaniu na boki elementów obwodu 74 i 75 na przyklad czlon oznaczony przez 72a jest w styku z przewodzacym obszarem 77 w elemencie 75, nastomiast nie jest w styku z obszarem 76 w elemencie 74, przeciwnie, czlon 72b jest w styku z obszarem 76 w elemen¬ cie 74, natomiast nie jest w styku z obszarem 77 w elemencie 75. Dlatego tez dopuszczalne jest wzgledne boczne przemieszczenie miedzy elemen¬ tami 74 i 75, rzedu przedstawionego na rysunku, które nie powoduje zwarcia sasiadujacych obsza¬ rów 76 lub 77, oraz nie powoduje obawy, ze od¬ powiadajace sobie obszary 76 i 77 zostana nie po¬ laczone. PL PLProprietor of the patent: International Computers Limited, Letchworth (Great Britain) Manufacturing of a resilient electrical connector for microcircuits and a connector produced by this method The invention relates to a method of manufacturing a resilient electrical connector for microcircuits and a connector manufactured by this method. it allowed for a significant reduction in the dimensions of individual microcircuit elements, a large number of circuits are placed in a very small volume, in a so-called bundle, but then a correspondingly large number of connections of such a microcircuit packet must be made. One of the difficulties in making such electrical connections is that the dimensions and tolerances of the connections of the microcircuit packets are extremely small and therefore these connections are difficult to make using conventional technique. It is also necessary that the microcircuit pack be easily interchangeable, but if the microcircuit has a large number of persistent connections to external circuits, the time and effort required to disconnect and re-establish connections becomes particularly long and expensive. The difficulty in replacing the microcircuit packets, which are soldered to the external circuits, is that the solder must then be very carefully fused with each wire. In conventional electrical components, electrical contact between these components is most often provided by springs made of an electrically conductive material incorporated into the insulating material. The end of the spring is kept in contact with the electrically conductive part of the element when pressure is exerted on at least one of the elements and the spring is compressed, thus ensuring an electrical connection between the elements. However, with the development of the micro-circuits and the need to do so, In the micro-circuit device of electrical connection of a large number of wires of very small dimensions, it was found that the spring contacts used so far are not easily miniaturized. In many cases, it is therefore necessary to mount the microcircuit devices on carrier plates of much larger dimensions in order for the device to adapt to conventional electrical contacts and connectors, which, however, increases the dimensions and cost of the microcircuit packets and in fact undermines the advantages of the miniaturization technique. the elimination of the above-mentioned inconveniences. The technical task leading to this aim is to develop a method of making a resilient connector for microcircuits and easy to assemble and disassemble microcircuits, accomplished in this way. This task was solved thanks to the fact that according to the invention was developed a method of making a spring-loaded electric microcircuit connector by using a metal thin plate having the shape of a frame, the longer sides of which are similar to 63081630 3-4 jointly connected by evenly spaced, parallel strip members, and then the shapes are stacked by stacking them one by one and on the other, alternating with spacers of the same shape as the metal shapes but without strip members, then the space between the sides of the stack shapes is filled with a liquid hardening elastomeric insulating material, after the material solidifies, it will remove the step sides. with a second object of the invention, an electrical switch produced by this method was developed; The connector comprises a plurality of elongated flexible resilient conductive members embedded in a block of elastomeric insulating material, each of the conductive members located between the surfaces of the block and the ends of the conductive members protruding from the surface areas of the member. Such a connector forms a series of conductive paths between two microcircuits, each of which is in contact with a corresponding part of one of the two surface areas. Most preferably, these surface areas are parallel, opposing faces of the slab forming the block. A relatively low contact force is sufficient to ensure good contact. It is most preferred that the ends of the conductive members protrude slightly from the surface of the block. The protruding ends may be made of a material different from the material of the spring members, for example, an intermediate material which requires good bonding, and an end layer made of noble metal. The subject of the invention is illustrated in an example of embodiment in the figure, where fig. 1 shows a spring member bent at a right angle, fig. 2 - a spring member having a curvilinear shape, fig. 3 - a spring member embedded in an elastomeric material, fig. 4 - electric connectors in a practical embodiment, fig. 5 - a member resilient as part of the frame, fig. 6 - metal frame, which serves as a spacer, fig. 7 - a stack containing alternately arranged elements shown in figs. 5 and 6, fig. 8 - another embodiment of the connector, and fig. 9 - shows the connector of figure 8 in use. A method for producing the resilient electrical connector for microcircuits shown in figure 3 is as follows. A conventional chemical etching technique produces a template in the form of a thin metal plate having the shape of a frame 32 (FIG. 5) with a large number of spring members 10. A formation or cut 36 is made at each corner of the frame for the next accurate assembly and alignment of the frames. In the chemical etching process, a large number of frames are made in one operation, all of them having exactly the same dimensions. Then, on the frame 32, the spacing member, or spacer 33, shown in Fig. 6 is set, and then a stack is built, which alternately comprises frames 32 and spacing members 33, the thickness of the spacing segments accurately determining the distance between each two frames 32. The entire stack is then squeezed between the end plates 34 and 35 by pins 37 as shown in FIG. 7, thereby forming a cavity containing a large number of carefully spaced 5 spring members 10. The cavity is filled with a suitable liquid elastomer, which may be silicone rubber, for example. The elastomer is then polymerized and the end plates 34 and 35 and the spacers 33 are removed, and the frames 32 are then removed by chemical etching. so that in the block of polymerized elastomer only the resilient members 10 precisely permanently arranged in the elastomeric material 21 remain. if necessary, it is subjected to a grinding process in order to improve its flatness. In this way, a spring-loaded electrical connector for microcircuits 1 is produced, in which between one side of a sheet of flexible elastomeric material and its other side a large amount of electrically conductive paths isolated from each other. Thus, a flat connector 1 is produced which has an anisotropic conductivity characteristic, ie has a high degree of conductivity in one direction and a low or negligible degree of conductivity in the direction orthogeneous to that direction. As a result of such properties, a microcircuit having contacts, relatively conductive, the contact surfaces in contact with a number of spring members 10 housed in elastomer 21 is electrically connected to external circuits, for example, as printed circuits, provided with contacts to ensure mutual connection. relatively conductive contact surfaces with the same geometry as the microcircuit. The electrical connection between the microcircuit and the printed circuit board is achieved simply by placing a spring-loaded connector 1 between the microcircuit and the printed circuit board, and applying little pressure to this assembly to ensure reliable electrical connections. Referring to Fig. 1, the spring member 10 according to the invention has contact surfaces 11 and 12, respectively, at the top and bottom. The spring member 10 is formed of an electrically conductive elastic material, such as, for example, phosphor bronze. Another embodiment of the spring member is shown in FIG. 2, member 40 has two opposite contact surfaces 41 and 42. The spring members 10 and 40 have a cross-sectional dimension of the order of 25 µ and a length of 2 mm. 3 shows a spring-loaded electrical connector 1 in which a large number of spring members such as 10 or 40 are used. Each spring member It) is embedded in an elastomeric material 21 which both physically and electrically separates each other. link 10 from one another forming the link 1. In order to improve the flatness of its surface, the elastomeric material 21 is ground and during this process the contact surfaces 11, 12 20 25 30 35 40 45 50 55 60. 81 630 5 resilient members 10 are deepened as shown, slightly below the surface of the material 21. Preferably, the opposing contact faces 11 and 12 are directly overlapped by another conductive material and formed as shown in FIG. 3, contacts 13, 1 A, 19, 20, 22 and 23. The contact surfaces of the conductive element 14 of the microcircuit 15 are arranged so as to form an electrical contact with contacts 13, 18 and 19. Likewise, the conductive element 16 is arranged in a position. It is so that: it electrically connects contacts 20, 22 and 23 with an external electric micro-circuit, not shown in the drawing. The conductive element 16 is, for example, the conductive part of a printed circuit board. In this way, by arranging the conductive element 16 on a rigid substrate and by applying a force, for example of 50 grams, to the microcircuit 15, a reliable spring is created by means of the flexible connector 1; the electrical connection between the contact surface of the conductive ele- ments 14 and the conductive element 16. It should be emphasized that such a shaped connector 1 does not need to be subjected to a thorough control with regard to the height of the electrically conductive parts contained in it, as is the case when conventional elements are used as electrically connecting elements , this problem disappears because the connector 1 is fully resilient: Also because no part of the spring connector 1 is tied or permanently connected to the conductive contact surfaces of elements 14 and 16 replacement of a particular component such as example microcircuit. 15 is easily realized by removing the sub-assembly from the state of contact with the connector 1. In FIG. 3, the conductive element 16 is shown in contact with three contacts 20, 22, 23 of the resilient members, but of course the conductive element 16 may be In contact with a greater number of contacts, for example five or six, without affecting the quality of the existing connection between the conductor 16 and the contact surface of the conductive element 14. The dome-shaped contacts 14, 18 and 19 and 20, 22 and 23 can also be be made flat so that the contacts lie on the same surface as the surface of the elastomeric material 21, and then the domes forming the contacts are redundant. Referring to Fig. 4 showing the use of electric spring-loaded connector 1 in an electric joint on the water-cooled radiator 25 is fitted with a microcircuit 15 with a spring-loaded electric switch 1 mounted on the periphery 15. The printed circuit board is By means of retaining pins 26 and 27, respectively positioned in relation to the various microcircuits 15, the spindles 28 and 29 serve to hold the printed circuit board in contact with the spring-loaded fastener 1 by applying constant pressure to it. The terminals 30 on the printed circuit board can then be connected 6 to the resilient electrical connector 1 by means of interconnectable components 31 on the printed circuit board, although the spring member 10 is shown in Fig. 2 in two different forms, it should be emphasized that these figures are merely exemplary and that other forms may be used. shapes. However, in each individual case, the spring member 10 or 40 itself does not have sufficient strength to support the microcircuit element 15, and only by embedding it in the elastomeric material 21 is sufficient strength of a number of such spring members 10, 15. An example of the implementation of the invention is the stopping on an elastic member of a porous material. In the pores, it settles selectively appropriate. metals creating a large number of: electrically conductive paths from one mirror and elastic member 20 to its other surface. Referring to Fig. 3, it should be noted that the parts of contacts 13, 18 and further, form domes, protruding slightly beyond the surfaces of block 21 of the elastomeric material, which facilitates the achievement of adequate pressure by the contact portions of the conductive elements without overloading the adjacent circuit elements, which could cause the elastomer block to move. . Especially when the conductive contact areas of the associated microcircuit and / or the circuit plates lie on the same plane. The elastomeric material, in practice, is not easy to move because the soft material has a fairly high coefficient of friction, as a result of the face of the block in contact with the perimeter element tends to resist lateral displacement with respect to the face of the element. This tendency increases with increasing pressure, whereby the practical pressures applied to the elements may generate slight bulges at the ends of the connector block 1. It is preferable that the ends of the conductive parts embedded in the block protrude slightly from the surface of the block. for the forces applied to the circuit elements then only cause effective pressures between the seated members and the conductive regions of the circuit elements. It is preferable, as shown in Fig. 8, 50, that the contact end has an outer layer 71 made of noble metal, for example gold. Depending on the material used for the conductive members 72 embedded in the elastomeric block, it may be necessary to use an intermediate portion in the form of layers 70 of another conductive material in order to ensure good bonding of the materials to one another. 70 forms the protruding ends of the conductive members 72. Block 21 may have conductive members 72 made of, for example, beryllium copper or phosphorus alloy, bent in a V-shape to provide a backward resilience in the direction in which the pressure is applied. The ends of the members 72 are initially positioned so as to be on the same level as the front planes 79 and 79a on the same day. A layer 70, for example copper, for example, is formed over the ends of the trunks 72 by an electrolytic process, a copper layer 70 is formed by a deposition process over each end of the member 72. Then another layer 71, for example gold, is deposited by a similar process. on the copper domes 70 so that the gold layers forming the contact protrude from the face surfaces 79 and 79a. Referring to Fig. 9 which illustrates an example of mounting between a pair of microcircuit elements 74 and 75 having conductive regions 76 and 77, a contact block similar to 8 and applying pressure to make mutual contact, it can be seen that in addition to the bulging at the edges of the block 21 in the space between the surfaces 74 and 74a of the elements 74 and 75 and the bulges on the initially flat surfaces 79, 79a of the block, the elastomeric material block is not moved. It should also be emphasized that, since there is no initial pressure between the block surfaces 79, 79a and the element surfaces 74, 74a upon assembly, only slight friction occurs prior to the application of pressure, which prevents a slight relative displacement between the block and elements 74 and 75. Effective Electrical contact between the conductive surfaces 76 and 77 is provided in three ways. First, the individual pressures between the contact ends 72 and the respective regions 76 and 77 are little dependent on the compressive strength of the elastomeric material of block 21. the second noble material coating of the ends of the members 72 provides a further improvement in the contact, and thirdly, each tendency to move the block 21 laterally produces a pressing action between the contacting ends 72 and the conductive regions 76 and 77, respectively. it is that when using this kind of contact block assembly it is possible There is some degree of tolerance in the lateral positioning of the circuit elements 74 and 75, for example the member denoted by 72a is in contact with the conductive area 77 in the member 75, and not in contact with the area 76 in the member 74, on the contrary, the member 72b is in contact with area 76 in element 74, but not in contact with area 77 in element 75. Therefore, a relative lateral displacement between elements 74 and 75, of the row shown in the drawing, is permissible without short-circuiting adjacent areas. 76 or 77, and there is no fear that corresponding regions 76 and 77 will become unconnected. PL PL
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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GB2160970 | 1970-05-05 | ||
GB4519670 | 1970-09-23 |
Publications (1)
Publication Number | Publication Date |
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PL81630B1 true PL81630B1 (en) | 1975-08-30 |
Family
ID=26255424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PL1971147758A PL81630B1 (en) | 1970-05-05 | 1971-04-24 |
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US (1) | US3795037A (en) |
DE (1) | DE2119567C2 (en) |
FR (1) | FR2091247A5 (en) |
GB (1) | GB1341037A (en) |
PL (1) | PL81630B1 (en) |
SE (1) | SE384105B (en) |
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-
1971
- 1971-04-22 DE DE2119567A patent/DE2119567C2/en not_active Expired
- 1971-04-24 PL PL1971147758A patent/PL81630B1/pl unknown
- 1971-04-28 GB GB2160970A patent/GB1341037A/en not_active Expired
- 1971-05-05 SE SE7105861A patent/SE384105B/en unknown
- 1971-05-05 FR FR7116226A patent/FR2091247A5/fr not_active Expired
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1972
- 1972-12-11 US US00311602A patent/US3795037A/en not_active Expired - Lifetime
Also Published As
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DE2119567C2 (en) | 1983-07-14 |
SE384105B (en) | 1976-04-12 |
FR2091247A5 (en) | 1972-01-14 |
DE2119567A1 (en) | 1971-11-25 |
GB1341037A (en) | 1973-12-19 |
US3795037A (en) | 1974-03-05 |
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