DE1521401A1 - Weichloetverfahren an einer Nickeloberflaeche und Koerper mit einer durch dieses Verfahren erhaltenen Loetverbindung - Google Patents
Weichloetverfahren an einer Nickeloberflaeche und Koerper mit einer durch dieses Verfahren erhaltenen LoetverbindungInfo
- Publication number
- DE1521401A1 DE1521401A1 DE19631521401 DE1521401A DE1521401A1 DE 1521401 A1 DE1521401 A1 DE 1521401A1 DE 19631521401 DE19631521401 DE 19631521401 DE 1521401 A DE1521401 A DE 1521401A DE 1521401 A1 DE1521401 A1 DE 1521401A1
- Authority
- DE
- Germany
- Prior art keywords
- soldering
- nickel
- gold
- ait
- semiconductor device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 10
- 229910052759 nickel Inorganic materials 0.000 title claims description 9
- 238000005476 soldering Methods 0.000 title description 7
- 239000004065 semiconductor Substances 0.000 claims description 10
- 229910000679 solder Inorganic materials 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 2
- BHMLFPOTZYRDKA-IRXDYDNUSA-N (2s)-2-[(s)-(2-iodophenoxy)-phenylmethyl]morpholine Chemical compound IC1=CC=CC=C1O[C@@H](C=1C=CC=CC=1)[C@H]1OCCNC1 BHMLFPOTZYRDKA-IRXDYDNUSA-N 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 9
- 229910052737 gold Inorganic materials 0.000 description 9
- 239000010931 gold Substances 0.000 description 9
- 229910052718 tin Inorganic materials 0.000 description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 1
- 241000272517 Anseriformes Species 0.000 description 1
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 241000139306 Platt Species 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003353 gold alloy Substances 0.000 description 1
- MSNOMDLPLDYDME-UHFFFAOYSA-N gold nickel Chemical compound [Ni].[Au] MSNOMDLPLDYDME-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
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- B23K35/004—Interlayers, transition pieces for metallurgical bonding of workpieces at least one of the workpieces being of a metal of the iron group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
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- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9335—Product by special process
- Y10S428/936—Chemical deposition, e.g. electroless plating
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12889—Au-base component
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12937—Co- or Ni-base component next to Fe-base component
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12944—Ni-base component
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- Engineering & Computer Science (AREA)
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- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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- Electroplating Methods And Accessories (AREA)
- Chemically Coating (AREA)
Description
Patentanwalt
Anmelder: N. V. PHILIPS'QLOEIUMfENFABRIEKEN '
Anmelder: N. V. PHILIPS'QLOEIUMfENFABRIEKEN '
"teiohlötverfahren an einer Kiekeloberfliehe und Körper ait einer
duroh dieses Verfahren erhaltenen LStverbindung."
Sie Erfindung betrifft ein Verfahren sma Aufbringen
einer Schicht aus Weiohlöt auf einen Körper ait einer Oberfliohe, dl·
.in wesentlichen aus Nickel besteht, aittels eines Lötaetalles wie
Pb, Sn, In, einer Zinnlegierung oder einer Indiualegierung, im welehea
Zweok vor dem Aufbringen des LÖtaetallea die Äiokelfllohe «it
einea Goldüberxug versehen wird.'
Zur Verbesserung der sohleohten Lötbarkeit vor Ober«
flicken aus Niokel oder Nickellegierungen w£rd bei eine« bekannte» ·
Verfahren eine solche Oberfliohe sunlohst ait eine« Qoldftbersttg «it
einer Stärke von 1 bis 2,5 μ tibersogen, worauf das Lötaetall angebraoht
wird. Lötmetalle aus Zinnbasis benetsen SoldoberfHohen erkeblieh
besser als Niokel oder Nickellegierungen, aber die Lötbarkeit ist nota
nicht ganz zufriedenstellend« Wenn auf eine Yiakelowerflleet «in·
bestiaate Meng· Lötaetall gebraoht wird, flieest letztere· aloht kln*
reichend über die Oberfliohe aus» Site bringt »it sieh, das· «int
Menge Lötaetall auf gebraoht werden «use and ein flmss«ittel,
ist. Dies ist bei vielen Anwendungen unsmllssig, :..-·'
<: -.* ' ' ;!'
- Sie· gilt mater andere« ffe in
·Λ
leitervorriohtung aa Montagebodea el»er letalutll· sejfejitigt w»rien
■oll. In Hinbliok auf die Teaperatur, dU nle#t sm keeÄ*
wird au diese« Zweok oft Fb, Sn, eine tlaalegierieig»':
Indiualegierung ait OaIIiUB eier A^ualn^u« beAmtst·
besteht aus vernickelte« lieen-fiekeV'-ÖoaeVt oder am«
' 909850/03tS
152U01
gut« Wirkungew·!·· der Halbleitervorrichtung ist ·· erfordern·*, d«f·
di· Löteohioht einen niedrigen thermischen und einen niedrig» «ltktriaoh«n
Üebergangewideretand attfweist, d.h. da·· si· a6*gliohet dflna
•ein au·β.
Die Irfindung aohafft ein erheblich beeaere« Yerfanren
•um Durchführen eine· LBtvorgang·· cn eine« KSrper, des««n Oberfliehe
in wesentlichen au· Nickel besteht, wobei da· LStmetali «it niedrigea
Sohaelspunkt ein erheblieh besser·· Flieseverhalten al· auf einer Gold·
oberfliohe seigt» so da·· tMaerat dünne Löteohichtet» erhalten werden
kflnnen. Das erfindungsgralaee Verfahren hat daa Merkaalf da·· vor dea
Anbringen des LStmetall·· ein Ooldüberiug ai' einer Stlrke von 0,01
ble 0,2 μ auf der Hiokeloberfllohe angebracht und der K8rper darauf
auf eine'Temperatur ιwischen 300 und 43O0C erwirmt wird.
Infolge dieser Erwärmung diffundiert die Ooldsohioht in
da· Nickel, so das· an der Oberflieh· eine Nickel-Goldlegierung entsteht,
welche die beschriebene ror3Ügliche Benetzbarkeit aufweist· Die Ir«
wlraung auf «in· Temperatur innerhalb d·· angegebenen Bereich· i»t
•ine unumgängliche Forderung ua das gewünschte Resultat in erhalten»
Brfelft die Erwlrmung auf ein· Temperatur unterhalb 9009C, to dlfftmditrt
da· Gold nioht hinreichend in die Micke1sohlent «im and ti·
Benetzbarkeit übersteigt die einer öoldoberfHohe nieht mat stark.
Ist di· trhitiungsteaperatur s.l. 9000C, so diffundiert dae Gold su
tief in d*s liokel hineia, so daee die Oberfliehe atwh ein· geringere
Beaetsbarkeit aufweist. .
ils ame· ftr di· IStvarkeit wurde der Durchmesser, gar
«aalt, auf die ein· beetimmte Gewiohtsmtnge Sinnlot ausflieset.
, . ' 909850/0315
152U01
- 3 - ΡΗ.17.β66
Yerauehewelee wurden Iiokelplattsn ait einer Goldaohicht rtxa et«·.
0»1 a tbersogen. Sin· Platt· wurd· nicht erwirat und di· anderen
wurittt während 30 Minuten auf Temperaturen τοη 100, 800« 230, 300,
350, 400, 450 und 5000C gehalten. Zwieohen 300 und 4000C «er«· «in
,'. f lieae>Durohaeeaer de· ausgeflossenen Zinn· geaeseen, der etwa dreimal
f
grSsscr als der einer vergoldeten nicht erwäraten Platt· «ar· Bei.auf
grSsscr als der einer vergoldeten nicht erwäraten Platt· «ar· Bei.auf
t ffftap«ratur«n unterhalb 30O0O er#lrmtei>
Platten war dieser Surehaaaeer
» kau« grisevr und oberhalb 45O0C wurde e» proportional »ur
Di· Ooldsohicht kann auf rereohiedene Vei·· auf
]fiokelob«rflSoh· aufgebracht werden, s.B..galvanieoh öder auch aittttla
villa·· A«etau80headee ohne Anwendung einer lueeeren StroaqiMll·· Xn
fiiniioht auf di· Cltiohaleeigkeit d«r Ooldsohioht und inebeaooUre,
wwna- dar LStrorgang an kleinen Gegenständen erfolgen «oll, wird la
■ Hinbliek auf. die Einfachheit der Behandlung da« Auatauachbad »«Tortugt.
Di·*·-AuataueohbSder sind an aioh bekannt! ein solche· Bad «nthllt
·*!· K*Oeld»ojranid und W«iaalure und hat einen pB-Vert τοη. «twa i·
Da» «rfindungegwal··· Terfahren erfordert kein FlUMaittel
tua Löten. Auaeerd·« eignet eich dieses Terfahren Torsfiglica aaa draeklosen.
L8ten.
Si· durch da· Terfahrea nach der Brfiadang angeVraohte
litttahieht kann nioht nur sua Ltiten, »ondern auch als Xorraaiaaetahmlt
benutet werden, der erheblieh günstiger iet als Ate Iblleha« Aatikorrosionssohiohten.
Bs i»t bekannt, au dieaea Sweek «Ina Beaieat
eines weniger edlen Metall·· ala daa der unterlage aaiubriagaa· Bann
entsteht in einer feuchten ataosphlre nach Beschädigung ein karage-
909850/0315
- 4 -' PH.17.866
sohloesenee galvanisches Element, wobei das da· unterliegende Material
auf KoBten der unedleren, in Lotung gehenden Sohioht kathoditoh gtschützt
wird» Nach lingerer Ztit geht der Bohiitz vtrloren, wtnn tint
su grosse Menge der unedlen Sohioht gtlSst wird.
Bei der erfindungsgemfee angebrachten Sohioht Lötmetalltt
gibt ta tint Grtnsschicht eines Edelmetallea zwisohtn der unedlen
LStmetallsohioht, z.B. dem Zinn, und dem Baeiametall, z.B. Jfiokel,
vernickeltem Eisen oder vernickeltem Eisen-Nickel-Kobalt* Sofern dittt
Bdtlmetalltohioht nioht zu stark besohfidigt wird, schafft bei Btschfidigung
dtr unedlen Aussensohioht diese Anordnung tintn erheblich
dauerhafteren Schutz als die vorstehend beschriebene, bekannte Anordnung*
Eine Traneistorhülle fur tint Halbleitervorrichtung z.B.
wird als Ganzes vernlokeltt darauf wird ein Goldübtreug nitdergeaohlagtn,
trwfrat und s«B» galvanisoh versinnt· Dite ergibt eine Halbleittrvorriohtung
mit tiner Hüllt, dtrtn Ansohlussdra'hte vorsüglioh IStbar
sind, während das Ganz« erheblich korrosionsfester alt bisherigt Hüllen
£a wtrdtn nachstehend beispielsweise drti Ffllt btsehr
leben, in denen das' erfindungsgtmJiese Terfahrtn angewandt witd.
Itiapitl 1.
Auf tiner Anzahl eietrnert MontagebSdtft fflr tin UkIbltittndts
aiteentisit einea Durehattstr ^On 8 Km, zwti Qlftsduroh·
ffihrungtn uad einen Anathlussdraht, dtr tu Montagtboden angtsohwtisst
war, wurde vor dem Sohmelcen duroh galvanisches Vernickeln tint Nickel»·
eohicht «it tiner Starke von 5 μ angebracht. Zu diesem Zwtok wurde tin
909850/0315 BAD oRIG'NAU
auf 6O0C erhitztes Wattsohes Vernickelungsbad mit folgender Zusammen·*
Setzung pro Liter benutzti
■ 20 g HiOl0.6H9O
200 g HiSO .7H2O und
25 g H5BO3.
■ 20 g HiOl0.6H9O
200 g HiSO .7H2O und
25 g H5BO3.
Darauf wurden die MontagebSden überzogen mittel· eine·
bekannten Austauschbades mit 0*1 μ Gold*
einer Temperatur von 55O0C gehalten. Nach Abkühlung wurde auf der Seite
des Montagebodene. an der das Halbleiterelement angebracht werden solltef
eine Folie au· LStmetall mit der Zusammensetzung 70 # Sn und 30 $ Pb
angebracht und darauf ein Hiokelstreifen mit einem daran befestigten
tfalbleiterkristall gelegt. Das Qanze wurde zum Schmelzen der Folie
einige-Standen lang in einem heiaaen Misohgaaatrom aus Stickstoff mit
. 5 Volumenprozent Wasserstoff alt einer Temperatur Ton 300 0 erwlrmt.
Die Folien flössen unmittelbar aus und lieferten eine glelehaiseige Bedeckung
der Oberfllohe de· Montagebodens* Das Halbleiterelement bestand
aus einer {Jermaniumkristallplatte, die mit einer In-Ga-Legierung auf
einem HiokeIstretfen festgelötet war. Darauf wurde dft» Ganze in einem
kalte/i Luftstrom auf Zimmertemperatur abgekühlt. Bs wurde ·1η· το*«
zügliohe Haftung de· Kristall·· an dem Montageboden eriitVt.
Beiapiel 2. · . ■ ' * . '' . . " .
Sin au· Kupfer bestehander Montagefcodih für ein« Hoch·
Ieistung·diode, in dem eine kreiefSrmige Hut angebracht w»»t wuyie
mittel· de· vorstehend beschriebenen Bad·· mit einer 1 μ' etftrkin Hiok#X·
sohioht und diese mittel· eines Austaueohbades mit elftem 0,1 ψ starkes
909850/0315 ' \
-152U01
Oxidüberzug versehen und darauf der Kupferboden 30 Minuten lang auf eine
Temperatur von 33O0C erwiret. line zylindrische, einseitig geschlossene
Kappe» deren untere Seite Kit eine« gewissen Spiel in die kreisförmig·
Nut des Montagebodens passtet wurde auf gleiohe Weise verniokelt«
vergoldet und erwärmt. Auf den Montageboden wurde «ine Folie Blei-Zinnlot gelegt und darauf der Krieta.ll angebracht· Dann wurde
die Kappe Bit der unteren Seite in die* Nut geführt. Bs wurden einige
Perlohen Blei-Zinnlot an der Nut gegen die Kappe gelegt und das Gänse
auf eine temperatur von etwa 3OQ0C erwärmt« Maoh Abkf luag war das Lot
• swisohen die Nut und den Kappenrand geflossen, und es hatte sich eine
voraügliohe Haftung gebildet» Ks haste sich sine* gut aussehende! glatte
Lotnaht gesildet. Gleichseitig war der Kristai1 fest si* dem Montageboden
rerietet.
Beispiel 3.
Beispiel 3.
Auf einen Kupferboden für eine Halbleitervorrichtung
wurde' Kittels des Vernlekelungsbades nach Beispiel 1 eine Nickeleohiöht
Kit einer Stärke von 1 μ aufgebracht die Kittels eines Auetauaohbades
Kit eineK Goldüberzug Kit einer Starke von 0,1 μ versehen wurde, vorauf
das Gänse 30 Minuten lang auf 33O°C erwärmt wurde. Die .Heibleitervorriohtung
bestand aus einer GerKaniumkristallplatte, in die beiderseits
ein· IadiUKkugel durch XrwIrKuag teilweise eindiffundiert war. Auf der
Kollektorseite war die IndiuKkugel flaoh abgeschliffen» Der Halbleiter-'ikitper
wurde Kit dieser Seit« auf die vergoldete Oberfläche gelegt und la·'Qanse einige Hinuten lang auf ein· Temperatur von 160°0 in einer
dfiftde Oterfllohensohicht des IadiuKS floss über die vergoldete lodenfllohe
am und ergab so «ine vorsügliohe Haftung des Halbleiterkristalles
909850/0315 BAD obig>nAU
Claims (1)
1. Verfahren sub Aufbringen einer Schiaht aus Weichlot auf
•inen Körper "ait ainar OberflEehe, die ia wesentlichen aus Nickel besteht,
aittele einea LStaetalles wie Fb, Sn1 In, einer Zinnlegierung oder einer
Indiualegierung, »u welchem Zweck vor da« Aufbringen dea LStaetalles
die Xiokelfliohe ait eine'a Qolduberzug veraahen wird, dadurch gekenn-
* leiohnet, dass der Ooldübersug in einer Stfirke tob 0,01 bia 0,2 μ
aufgebracht und der Körper darauf auf eine Teaperatur swiaoken 3OQ0C
und 45O0O erwfrat wird.
2· KSrper, insbesondere Metallhülle fur «ine Halbleitervorrichtung,
an welchea Körper aindestens eine duroh Aas Terfahrtn naoh
Anspruoh 1 hergestellte LStverbindung vorgesehen ist»
3· Körper, insbesondere Metallhülle fur «in« Halbleitervorrichtung,
welcher Körper durch das Verfahren naeh Anspruch 1 ait •iner Bohioht LSteetall fibersogen ist·
909850/0315
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL281894 | 1962-08-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1521401A1 true DE1521401A1 (de) | 1969-12-11 |
DE1521401B2 DE1521401B2 (de) | 1972-03-02 |
DE1521401C3 DE1521401C3 (de) | 1975-05-15 |
Family
ID=19754033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1521401A Expired DE1521401C3 (de) | 1962-08-08 | 1963-08-03 | Verfahren zum Verbessern der Lötbarkeit einer im wesentlichen aus Nickel bestehenden Oberfläche eines Körpers |
Country Status (4)
Country | Link |
---|---|
US (1) | US3364064A (de) |
DE (1) | DE1521401C3 (de) |
GB (1) | GB1031436A (de) |
NL (1) | NL281894A (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3489266A (en) * | 1963-09-23 | 1970-01-13 | Sylvania Electric Prod | Hermetic seal for a thin-walled container |
US3516075A (en) * | 1965-10-04 | 1970-06-02 | Ncr Co | Bistable magnetic thin film rod having a conductive overcoating |
US3451030A (en) * | 1966-07-01 | 1969-06-17 | Gen Electric | Solder-bonded semiconductor strain gauges |
US3634048A (en) * | 1968-02-14 | 1972-01-11 | Mallory & Co Inc P R | Solderable stainless steel |
US3675310A (en) * | 1971-04-20 | 1972-07-11 | Us Interior | Soldering method |
US3963455A (en) * | 1973-01-12 | 1976-06-15 | Lea-Ronal, Inc. | Electrodeposited gold plating |
US3878065A (en) * | 1974-01-30 | 1975-04-15 | Buckbee Mears Co | Process for forming solderable coating on alloys |
US4361470A (en) * | 1974-09-03 | 1982-11-30 | Micro-Plate, Inc. | Connector contact point |
DE2742922C2 (de) * | 1977-09-23 | 1984-03-08 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum mittelbaren Verbinden zweier Teile |
DE2742921C2 (de) * | 1977-09-23 | 1985-07-11 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum mittelbaren Verbinden zweier Teile durch Verschweißung zweier Metallauflagen |
US4300959A (en) * | 1979-08-22 | 1981-11-17 | United Technologies Corporation | Impermeable electroform for hot isostatic pressing |
US4411965A (en) * | 1980-10-31 | 1983-10-25 | Occidental Chemical Corporation | Process for high speed nickel and gold electroplate system and article having improved corrosion resistance |
US4418857A (en) * | 1980-12-31 | 1983-12-06 | International Business Machines Corp. | High melting point process for Au:Sn:80:20 brazing alloy for chip carriers |
US4397086A (en) * | 1981-01-26 | 1983-08-09 | The Bendix Corporation | Method of fabricating a socket type electrical contact |
US4331258A (en) * | 1981-03-05 | 1982-05-25 | Raychem Corporation | Sealing cover for an hermetically sealed container |
US4505060A (en) * | 1983-06-13 | 1985-03-19 | Inco Limited | Process for obtaining a composite material and composite material obtained by said process |
US4551184A (en) * | 1983-06-13 | 1985-11-05 | Inco Limited | Process for obtaining a composite material and composite material obtained by said process |
US4666796A (en) * | 1984-09-26 | 1987-05-19 | Allied Corporation | Plated parts and their production |
US4601958A (en) * | 1984-09-26 | 1986-07-22 | Allied Corporation | Plated parts and their production |
US4737418A (en) * | 1986-12-22 | 1988-04-12 | Advanced Materials Technology Corp. | Nickel clad corrosion resistant lid for semiconductor package |
US4895291A (en) * | 1989-05-04 | 1990-01-23 | Eastman Kodak Company | Method of making a hermetic seal in a solid-state device |
US5466540A (en) * | 1994-02-14 | 1995-11-14 | Ceridian Corporation | Mark of an electronic component lid |
CA2370770A1 (en) | 1999-04-16 | 2000-10-26 | Edison Welding Institute | Soldering alloy |
US20070039826A1 (en) * | 2005-08-18 | 2007-02-22 | Chia-Hua Chang | Thickening method of an electroforming shim |
CN113529146B (zh) * | 2021-05-27 | 2022-06-07 | 中国航发南方工业有限公司 | 航空发动机扩压器刷镀镍工艺 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2429222A (en) * | 1943-06-05 | 1947-10-21 | Bell Telephone Labor Inc | Method of making contact wires |
GB872785A (en) * | 1957-04-17 | 1961-07-12 | Engelhard Ind Inc | Immersion plating with noble metals |
US2969295A (en) * | 1958-05-05 | 1961-01-24 | Pacific Semiconductors Inc | Chemical gold plating |
-
0
- NL NL281894D patent/NL281894A/xx unknown
-
1963
- 1963-07-30 US US298548A patent/US3364064A/en not_active Expired - Lifetime
- 1963-08-02 GB GB30759/63A patent/GB1031436A/en not_active Expired
- 1963-08-03 DE DE1521401A patent/DE1521401C3/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1521401C3 (de) | 1975-05-15 |
NL281894A (de) | |
US3364064A (en) | 1968-01-16 |
GB1031436A (en) | 1966-06-02 |
DE1521401B2 (de) | 1972-03-02 |
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