ruaj khov qauv nyob rau hauv niaj hnub electronics los xyuas kom meej tias cov installation yuav ntau compacted. Qhov tsim nyog ntawm qhov no yog qhov tshwm sim ntawm cov BGA housings. Pike cov nta nyob rau hauv lub tsev thiab peb yuav muab suav hais tias nyob rau hauv no tsab xov xwm.
lus qhia dav dav
Keeb nws tsis muaj tsev nyob muaj ntau cov lus xaus nyob rau hauv lub cev ntawm lub nti. Vim hais tias ntawm no, lawv tau muab tso rau hauv ib tug me me rau thaj tsam. Qhov no tso cai rau koj txuag lub sij hawm thiab tsim ntau thiab ntau yam me me kiag li lawm. Tab sis lub xub ntiag ntawm xws li ib mus kom ze nyob rau hauv siab puv txaav thaum lub sij hawm kho ntawm hluav taws xob khoom nyob rau hauv ib tug BGA pob. Brazing nyob rau hauv cov ntaub ntawv no, yuav tsum muaj raws li muaj tseeb thiab precisely ua rau technology.
Yuav ua li cas koj xav tau?
Koj yuav tsum Tshuag li on:
- Soldering chaw nres tsheb, qhov chaw uas muaj ib tug kub rab phom.
- Ncais.
- Solder muab tshuaj txhuam.
- Daim kab xev.
- Desoldering braid.
- Flux (dua li ntoo thuv).
- Stencil (mus thov solder muab tshuaj txhuam rau ib tug nti) los yog ib tug duav (tab sis zoo dua mus nyob rau hauv thawj embodiment).
Soldering BGA-corps tsis yog ib tug tham qhov teeb meem. Tab sis hais tias nws yog ntse los siv, nws yog tsim nyog los nqa tawm qhov kev npaj ntawm ua hauj lwm cheeb tsam. Tsis tas li ntawd rau tau ib tug repetition ntawm kev ua tau piav nyob rau hauv tsab xov xwm yuav tsum tau qhia rau koj txog cov yam ntxwv. Ces technology soldering tej daim nyob rau BGA pob yuav tsis tau yooj yim (yog tias muaj kev nkag siab txog cov txheej txheem).
nta
Qhia hais tias ib tug technology yog solder BGA tej pob khoom, nws yuav tsum tau muab sau tseg tej yam kev mob repetition tag nrho tuition. Yog li ntawd, nws twb siv Suav-ua stencils. Lawv peculiarity yog tias muaj cov ob peb daim no yog sau nyob rau hauv ib tug loj piece. Vim qhov no thaum rhuab Stencil pib khoov. Qhov loj loj ntawm lub vaj huam sib luag ua rau yus lub fact tias nws xaiv thaum cua sov ib tug tseem ceeb npaum li cas ntawm tshav kub kub (xws li, muaj ib tug radiator nyhuv). Vim hais tias ntawm no, koj xav tau lub sij hawm kom sov li lub nti (uas adversely muaj feem xyuam rau nws ua tau zoo). Tsis tas li ntawd, xws stencils yog ua los ntawm cov tshuaj etching. Yog li ntawd, cov tshuaj txhuam yog thov yog tsis yog li ntawd ib qho yooj yim raws li nyob rau hauv qhov kev kuaj los ntawm laser txiav. Zoo, yog koj yuav tuaj koom thermojunction. Qhov no yuav tiv thaiv tau dabtsi yog khoov stencils thaum lub sij hawm lawv cov cua kub. Thiab thaum kawg nws yuav tsum tau muab sau tseg hais tias cov khoom ua siv laser txiav, muab siab raug (sib txawv tsis ntau tshaj 5 microns). Thiab vim hais tias ntawm no yuav ua tau tej yam yooj yim thiab yooj yim rau siv cov qauv siv rau lwm yam hom phiaj. Thaum no accession yog tiav, thiab yuav tshawb li cas nta soldering BGA pob technology nyob rau hauv lub tsev.
kev kawm
Ua ntej yuav pib otpaivat nti, nws yog tsim nyog los muab tso rau lub xov touches rau ntawm ntug ntawm nws lub cev. Qhov no yuav tsum tau ua nyob rau hauv lub qhaj ntawv ntawm kev tshuaj ntsuam luam ntawv, uas qhia tau hais tias nyob rau hauv lub tshuab hluav taws xob tivthaiv txoj hauj lwm. Qhov no yuav tsum tau ua los pab txhawb lub tom ntej formulation ntawm lub nti rov qab mus rau lub Rooj Tswjhwm Saib. Tshuab yuav tsum ua kom muaj huab cua nrog warmth nyob rau hauv lub 320-350 degrees Celsius. Nyob rau hauv cov ntaub ntawv no rau saum huab cua tshaj tawm yuav tsum tau tsawg heev (txwv tsis pub yuav hloov rov qab pov tseg uas nyob ib sab solder). Tshuab yuav tsum tau khaws cia li hais tias nws yog perpendicular mus rau lub Rooj Tswjhwm Saib cov. Preheat nws no txoj kev hais txog ib tug feeb. Ntxiv mus, cov huab cua yuav tsum tsis txhob muab xa mus rau qhov chaw thiab lub puag ncig (ntug) ntawm lub Rooj Tswjhwm Saib. Qhov no yog tsim nyog nyob rau hauv kom tsis txhob overheating ntawm cov siv lead ua. Ib tug tshwj xeeb rhiab rau qhov no nco. Raws li los ntawm ib tug nuv ntawm ib tug ntug ntawm lub nti, thiab kom sawv saum toj no board. Ib tug yuav tsum tsis txhob rhuav kuv zoo tshaj plaws. Tom qab tag nrho, yog hais tias tus solder twb tsis tau kiag li melted, ces muaj yog ib tug uas yuav mus rhuav kev khiav. Tej zaum thaum ua ntawv thov flux thiab solder sov pib sib sau ua ke rau hauv npas. Lawv loj yuav ces yuav sis tsis ncaj. Thiab soldering tej daim nyob rau BGA pob yuav tsis.
tu
Thov spirtokanifol, sov nws thiab tau khib nyiab sau. Nyob rau hauv cov ntaub ntawv no, nco ntsoov tias ib tug zoo li mechanism yuav tsis nyob rau hauv txhua rooj plaub yuav tsum tau siv thaum ua hauj lwm nrog soldering. Qhov no yog vim muaj ib tug uas tsis muaj kev coefficient. Raws li los ntawm kev tu thiab ntxuav lub chaw ua hauj lwm cheeb tsam, thiab yuav yog ib tug zoo qhov chaw. Ces, los tshawb xyuas lub zwj ceeb ntawm cov uas nrhiav tau thiab los soj ntsuam seb puas yog nws ua tau rau nruab rau lawv nyob rau hauv lub qub qhov chaw. Nrog ib tug tsis zoo teb yuav tsum tau hloov. Yog li ntawd nws yog tsim nyog mus luaj lub rooj tsavxwm thiab chips ntawm lub qub solder. Muaj kuj yog ib tug tau hais tias yuav raug muab txiav tawm "penny" nyob rau lub Rooj Tswjhwm Saib (siv cov braid). Nyob rau hauv cov ntaub ntawv no, zoo yuav pab tau ib tug yooj yim soldering hlau. Txawm tias ib txhia neeg siv nrog braid thiab cov plaub hau dryers. Thaum ua tau zoo manipulations yuav tsum saib xyuas lub sam xeeb ntawm cov tshuaj lo daim npog qhov ncauj. Yog hais tias nws yog puas, ces cov tshuaj lo rastechotsya raws paths. Thiab ces BGA-soldering yuav tsis vam meej.
Knurled tshiab khoom
Koj muaj peev xwm siv twb npaj teb. Lawv yog cov nyob rau hauv xws li ib tug cov ntaub ntawv, koj cia li yuav tau tsi los ntawm cov pawm no ntau npau rau yaj. Tab sis qhov no yog tsuas haum rau ib tug me me muaj pes tsawg tus ntawm cov lus xaus (yuav koj xav txog tej yam ib tug nti nrog 250 "ko taw"?). Yog li ntawd, raws li ib tug yooj yim txoj kev uas yuav soj ntsuam technology siv. Tsaug rau cov hauj lwm no yog nqa tawm sai sai thiab nrog rau cov zoo tib yam. Tseem ceeb no yog txoj kev siv cov high-zoo solder muab tshuaj txhuam. Nws yuav tsum tam sim ntawd hloov mus rau hauv ib tug ci ntsa iab tus pob. Tsawg-zoo daim ntawv ntawm tib yuav tawg ua me me mus rau hauv ib tug loj tus naj npawb ntawm cov me me puag ncig "thooj". Thiab nyob rau hauv cov ntaub ntawv no, tsis txawm lub fact tias cov cua sov txog li 400 degrees ntawm tshav kub thiab nws muaj ib tug flux yuav pab tau. Rau qhov yooj yim ntawm lub nti yog tsau nyob rau hauv lub Stencil. Tom qab ntawd, ib tug duav mus thov solder muab tshuaj txhuam (txawm hais tias koj yuav siv koj cov ntiv tes). Ces, thaum tswj Stencil ciaj tais, nws yog tsim nyog rau yaj lub muab tshuaj txhuam. tshuab kub yuav tsum tsis pub tshaj 300 degrees Celsius. Nyob rau hauv rooj plaub no tus ntaus ntawv yuav tsum tau perpendicular mus rau lub tshuaj txhuam. Lub Stencil yuav tsum tau khaws cia kom txog rau thaum cov tshuaj lo hardens kiag li. Tom qab ntawd koj yuav tshem tawm cov fastening daim kab xev thiab lub insulating tshuab, cua uas yog preheated rau 150 degrees Celsius, maj mam muab kub kom txog thaum nws pib yaj flux. Koj muaj peev xwm ces disconnect los ntawm lub Stencil nti. Qhov kawg no yuav tsum tau tus khoom. Lub nti yog tseem siab npaj rau nruab nws rau lub rooj tsavxwm. Raws li koj tau pom, soldering BGA-zoo li yog tsis nyuab thiab nyob rau hauv tsev.
fasteners
Yav tas los, nws twb pom zoo kom ua lub finishing touches. Yog hais tias cov tswv yim no, lub tso rau twb tsis coj mus rau hauv tus account yuav tsum tau nqa tawm raws li nram no:
- Ntxeev nti li hais tias nws mus cov lus xaus.
- Xa mus rau lub ntug dimes kom lawv coincide nrog npas.
- Peb kho, uas yuav tsum tau cov nti ntug (rau qhov no me me khawb nrog ib rab koob yuav tsum muaj ntaub ntawv).
- Yog tas, ua ntej ib tug txoj kev thiab mam perpendicular mus rau nws. Yog li, nws yuav tsum txaus ob khawb.
- Peb muab ib tug nti rau designations thiab sim mus caum cov khoom kov pyataks ntawm qhov siab.
- Nws yog tsim nyog los sov li lub chaw ua hauj lwm cheeb tsam kom txog rau thaum cov tshuaj lo yog nyob rau hauv ib tug molten lub xeev. Yog hais tias saum toj no cov kauj ruam tau ua raws nraim lub nti yuav tsum tsis txhob yuav ib qho teeb meem rau nws lub rooj zaum. Qhov no yuav pab kom nws quab yuam ntawm nto nro, uas muaj solder. Nws yog tsim nyog los muab tso rau ib tug heev me ntsis ntawm flux.
xaus
Ntawm no nws yog tag nrho cov hu ua "lub cuab yeej ntawm soldering tej daim nyob rau BGA pob." Nws yuav tsum tau muab sau tseg no uas siv tsis paub rau feem ntau cov xov tooj cua amateurs soldering hlau thiab cov plaub hau tshuab. Tab sis, dua li no, cov BGA-soldering qhia tau hais tias zoo tshwm sim. Yog li ntawd, nws tseem yuav txaus siab rau thiab yuav ua li cas nws heev ntse. Txawm tias tus tshiab yeej ib txwm ntshai ntau, tab sis, nrog rau lub tswv yim kev ntawm no technology ua commonplace cuab tam.