SMT ist cov ntawv luv ntawm cov txheej txheem raws li PCB. PCB yog daim txhuam cev Circuit Court board. SMT (Surface Mount Technology) yog cov thev naus laus zis thiab cov txheej txheem hauv cov khoom siv hluav taws xob sib sau ua ke.
Nto Mount Technology (SMT) yog cov qauv ntawm txoj kev ua cov hmoov txhuas-dawb lossis luv-txhuas saum npoo av (SMC / SMD rau luv, nti Cheebtsam hauv Suav) rau saum npoo ntawm cov ntawv luam tawm Circuit (PCB) lossis lwm qhov chaw ua haujlwm qis. Circuit Court sib dhos tshuab rau cam los ua ke los ntawm reflow soldering lossis dip soldering.
Nyob rau hauv ib txwm muaj xwm txheej, cov khoom siv hluav taws xob uas peb siv yog tsim los ntawm PCB ntxiv rau ntau lub zog, tiv thaiv kab hluav taws xob thiab lwm yam khoom siv hluav taws xob raws li cov qauv siv hluav taws xob tsim, yog li ntau cov khoom siv hluav taws xob xav tau ntau hom smt chip ua tshuab los ua.
SMT cov txheej txheem yooj yim
Solder muab tshuaj txhuam luam ntawv-> Qhov kev tso kawm-> Reflow soldering-> AOI kho qhov muag-> Kev Txij Nkawm-> Sub-board.
Cov khoom siv hluav taws xob raug tsim kho me me, thiab yav dhau los siv los ntawm qhov-ntxig cov khoom siv tau ua tsis tau kom me me. Cov khoom siv hluav taws xob muaj ntau qhov kev ua tiav, thiab cov kev sib xyaw ntawm cov hluav taws xob (ICs) siv los tsis muaj qhov sib txuam, tshwj xeeb tshaj yog cov ntsuas loj, ICs sib xyaw ua ke, thiab yuav tsum siv cov khoom sib txuas saum npoo av. Cov khoom lag luam thiab khoom ntau lawm. Lub Hoobkas yuav tsum tsim cov khoom lag luam zoo ntawm tus nqi qis thiab cov zis muaj txiaj ntsig kom tau raws li cov neeg siv khoom xav tau thiab ntxiv dag zog rau kev sib tw ua lag luam. Kev txhim kho ntawm cov khoom siv hluav taws xob, kev txhim kho ntawm kev sib xyaw ntawm kev siv hluav taws xob (ICs), thiab kev siv ntau yam ntawm cov khoom siv hluav taws xob. Kev hloov hluav taws xob thev naus laus zis yog qhov yuav tsum tau ua raws li cov qauv thoob ntiaj teb. Nws yog pom tau tias nyob rau hauv rooj plaub uas qhov kev tsim thev naus laus zis ntawm CPU thoob ntiaj teb thiab cov duab tsim cov khoom lag luam xws li Intel thiab AMD tau nce mus rau ntau tshaj 20 nanometers, kev txhim kho ntawm smt saum npoo los ua ke thev naus laus zis thiab cov txheej txheem kuj tsis tsim nyog.
Cov txiaj ntsig zoo ntawm smt chip ua: lub siab sib dhos ua ke, qhov loj me me, thiab lub teeb yuag ntawm cov khoom siv hluav taws xob, qhov ntim thiab qhov hnyav ntawm cov khoom sib ntxiv tsuas yog li 1/10 ntawm cov tsoos ntsaws-hauv cov khoom siv. Feem ntau, tom qab siv SMT, qhov ntim ntawm cov khoom siv hluav taws xob raug txo 40% ~ 60%, Lub cev hnyav dua 60% ~ 80%. Muaj kev cia siab rau thiab muaj zog tiv thaiv kev co. Tus nqi qes qes qes qis. Zoo high-zaus cov yam ntxwv. Txo cov khoom siv hluav taws xob thiab xov tooj cua cuam tshuam. Yooj yim rau kev siv tshuab automation thiab txhim kho kev ua tau zoo. Txo cov nqi 30% rau 50%. Txuag cov khoom, zog, khoom siv, manpower, sijhawm, thiab lwm yam.
Vim tias cov txheej txheem nyuaj ntawm smt chip ua, ntau smt chip ua cov chaw muag khoom tau tshwm sim, tshwj xeeb hauv smt chip ua. Nyob rau hauv Shenzhen, ua tsaug rau txoj kev loj hlob ntawm lub tshuab hluav taws xob hluav taws xob, smt nti ua tiav Nws' s ib qho kev lag luam tawg.
Txheej Txheem
SMT cov txheej txheem yooj yim: tshuaj ntsuam kev luam ntawv (lossis kev xa tawm), kev tso kawm (kho), reflow soldering, ntxuav, tshuaj xyuas, thiab kho
1. Silkscreen: Nws txoj haujlwm yog tso xau lub zom zaws lossis muab cov kua nplaum lo rau lub ncoo PCB los npaj rau lub vuam ntawm Cheebtsam. Cov khoom siv siv yog tshuaj ntsuam tshuab luam ntawv (tshuaj ntsuam tshuab luam ntawv), uas tau nyob rau ntawm qhov ntej ntawm kab SMT ntau lawm.
2. Kev faib tawm: Nws yog txau kua nplaum rau hauv qhov chaw ruaj ruaj ntawm PCB, thiab nws lub luag haujlwm tseem ceeb yog kho cov hauv Cheebtsam ntawm PCB. Cov khoom siv siv yog dispenser, uas yog nyob ntawm qhov pib ntawm SMT ntau lawm kab lossis tom qab cov khoom siv tshuaj xyuas.
3. Kev Tshawb Fawb: Nws lub luag haujlwm yog txhawm rau txhawm rau nto rau qhov chaw ruaj ruaj rau qhov chaw ruaj ruaj ntawm PCB. Cov khoom siv siv yog tshuab tso, uas yog nyob tom qab ntawm lub tshuab luam ntawv tshuaj ntsuam hauv SMT cov kab ntau lawm.
4, tua: nws lub luag haujlwm yog yaj lub kua nplaum kom cov nplaim hluav taws xob sib dhos thiab PCB pawg thawj coj tau muab sib dhos ua ke. Cov khoom siv siv yog lub tshuab ua kom zoo nkauj, nyob tom qab lub tshuab tso rau hauv SMT cov kab ntau lawm.
5, reflow soldering: nws lub luag hauj lwm yog yaj yaj ham muab tshuaj txhuam kom cov khoom sib dhos saum npoo thiab cov laug cam PCB khov kho sib khi ua ke. Cov cuab yeej siv yog lub qhov cub reflow uas nyob tom qab qhov chaw tso tshuab hauv SMT cov kab ntau lawm.
6. Kev Tu Kom Huv: Nws lub luag haujlwm yog tshem cov vuam seem xws li flux uas muaj kev phom sij rau tib neeg lub cev ntawm PCB sib dhos. Cov cuab yeej siv yog tshuab ntxhua khaub ncaws, thiab qhov chaw nyob tsis tuaj yeem tsau, online lossis offline.
7. Kev Tshuaj Ntsuam Xyuas: Nws txoj haujlwm yog los tshawb xyuas qhov vuam zoo thiab lub zog sib dhos ntawm PCB cov kev sib dhos. Cov khoom siv siv yog tsom iav, tsom tsom, tsom rau hauv cov xov tooj hluav taws xob (ICT), ya mus soj ntsuam kev ntsuas, tsis siv lub tshuab kuaj hluav taws xob (AOI), X-RAY soj ntsuam xyuas, ua haujlwm tester, thiab lwm qhov chaw tuaj yeem teeb nyob rau qhov chaw tsim nyog ntawm cov kab ntau lawm raws li qhov xav tau ntawm kev tshuaj xyuas.
8. Rov Ua Haujlwm: Nws lub luag haujlwm yog ua kom cov PCB tsis muaj qhov ua tiav. Cov cuab yeej siv yog soldering irons, chaw nres tsheb rework, etc. Muab tso rau txhua qhov chaw ntawm cov kab ntau lawm.
Cov txheej txheem SMT
Ib Leeg Ib Leeg Tes
Cov khoom tuaj kuaj=GG gt; Silk screen solder paste (spot adhesive)=GG gt; SMD=GG gt; Kev ziab khaub ncaws (kho)=GG gt; Reflow soldering=GG gt; Kev Tu Khoom=GG gt; Tshuaj ntsuam xyuas=GG gt; Rov ua haujlwm
Lub rooj sib txig ob tog sib tshooj
A: Cov khoom tiav kev soj ntsuam=GG gt; Ib sab tshuaj ntsuam tshuab luam ntawv muab tshuaj txhuam (pom cov nplaum) ntawm PCB=GG gt; B sab screen printing solder muab tshuaj txhuam (chaw nplaum) ntawm PCB=GG gt; thaj=GG gt; ziab=GG gt; reflow soldering (Nws yog qhov zoo dua rau tsuas yog huv B sab=GG gt; huv=GG gt; tshuaj ntsuam=GG gt; kho).
B: kev kuaj khoom tuaj=GG gt; PCB sab Ib vijtsam luam ntawv tshuab muab tshuaj txhuam (taw tes nplaum)=GG gt; SMD=GG gt; ziab (tua)=GG gt; Ib sab reflow soldering=GG gt; kev tu=GG gt; flip board=PCB B sab taw tes SMD nplaum=GG gt; SMD=GG gt; Kev tua=GG gt; B-sab Wave Soldering=GG gt; Kev Tu Khoom=GG gt; Tshuaj ntsuam xyuas=GG gt; Rov ua haujlwm)
Tus txheej txheem no yog tsim nyog rau reflow soldering ntawm A-sab thiab yoj soldering ntawm B B. Hauv SMD sib sau ua ke ntawm B sab ntawm PCB, thaum tsuas yog SOT lossis SOIC (28) pins hauv qab, tus txheej txheem no yuav tsum tau siv.
Ib leeg ib leeg txheej txheem sib xyaw
Cov khoom tuaj kuaj=GG gt; PCB sab Ib vijtsam luam ntawv tshuab muab tshuaj txhuam (taw tes nplaum)=GG gt; SMD=GG gt; ziab (tua)=GG gt; reflow soldering=GG gt; kev tu=GG gt; ntsaws-hauv=GG gt; yoj soldering=GG gt; kev tu=GG gt; soj ntsuam=GG gt; Rov ua haujlwm
Ob tog ob tog txheej txheem sib xyaw
A: Kev tshuaj xyuas khoom tuaj=GG gt; B-sab chaw cov nplaum ntawm PCB=GG gt; SMD=GG gt; kev kho=GG gt; ntxeev board=GG gt; A-sab ntsaws ntawm PCB=GG gt; yoj soldering=GG gt; kev tu=GG gt; soj ntsuam=GG gt; rov ua haujlwm
Ntxig ua ntej thiab ntxig rau tom qab, haum rau rooj plaub uas muaj SMD ntau dua li cov khoom sib cais
B: kev kuaj khoom tuaj=GG gt; PCB sab Ib txoj hlua (pin khoov)=GG gt; ntxeev board=GG gt; PCB sab chaw thaj kua nplaum=GG gt; thaj=GG gt; kev kho=GG gt; ntxeev board=GG gt; yoj soldering=GG gt; kev tu=GG gt; Tshuaj ntsuam xyuas=GG gt; Rov ua haujlwm
Ntxig ua ntej thiab muab tshuaj txhuam tom qab, siv tau thaum muaj cov sib cais ntau tshaj li SMD Cheebtsam
C: Cov khoom tiav kev soj ntsuam=GG gt; PCB sab Ib qho screen luam ham muab tshuaj=GG gt; thaj=GG gt; ziab=GG gt; reflow soldering=GG gt; plug-in, tus pin khoov=GG gt; ntxeev board=GG gt; PCB B nto taw tes lo kua nplaum=GG gt; SMD=GG gt; kev kho=GG gt; nrov plig plawg=GG gt; yoj soldering=GG gt; kev tu=GG gt; soj ntsuam=GG gt; rework Ua haujlwm Ib sab sib xyaw, B sab txhawb.
D: Khoom xa tuaj khoom=GG gt; PCB B nto taw tes nplaum=GG gt; SMD=GG gt; kev kho=GG gt; ntxeev board=GG gt; Ib sab tshuaj ntsuam luam ntawv cam muab tshuaj ntawm PCB=GG gt; SMD=GG gt; Ib sab reflow soldering=GG gt; ntsaws-hauv=GG gt; B-sab nthwv dej soldering=GG gt; Kev Tu Khoom=GG gt; Tshuaj ntsuam xyuas=GG gt; Kev Ua Haujlwm Ib sab sib xyaw, B sab txhawb. Ua ntej lo ob sab SMD, reflow soldering, tso cov duab tom qab, yoj soldering E: kev soj ntsuam nkag=GG gt; PCB sab B tshuaj ntsuam luam ntawv cam muab tshuaj txhuam (taw tes lo kua nplaum)=GG gt; thaj=GG gt; ziab (tua)=GG gt; reflow soldering=GG gt; Tig board=GG gt; PCB sab Ib qho screen luam ham muab tshuaj=GG gt; SMD=GG gt; Kev ziab=Reflow soldering 1 (hauv zos soldering yuav siv tau)=GG gt; Plug-in=GG gt; Wave soldering 2 (Yog tias muaj qee qhov sib txuam, koj tuaj yeem siv phau ntawv soldering)=GG gt; Kev Tu Khoom=GG gt; Tshuaj ntsuam xyuas=GG gt; Kev Ua Haujlwm Ib tog nce qib, B sab sib tov.
Muab ob txheej txheem sib dhos txheej txheem
A: Cov khoom lag luam tshuaj xyuas tuaj, A-sab tshuaj ntsuam luam ntawv cam cam xim (pom cov nplaum pleev xim) ntawm PCB, thaj, ziab khaub ncaws (kho), A-sab reflow soldering, ntxuav, ntxeev; B-sab tshuaj ntsuam luam ntawv cam muab tshuaj txhuam (taw tes thaj ua rau ntawm PCB) Cov kua nplaum), SMD, ziab, rov qab zoo dua qub (dua li tsuas yog B sab, ntxuav, kuaj, ua haujlwm)
Tus txheej txheem no haum rau SMD loj xws li PLCC mounted rau ob sab ntawm PCB.
B: Kev tshuaj xyuas khoom tuaj, A-sab tshuaj ntsuam tshuab luam ntawv cam muab tshuaj txhuam (chaw pleev xim), PCB, ziab (kho), A-sab reflow soldering, ntxuav, ntxeev; B-sab chaw nplaum, PCB, kho, B-sab yoj soldering, ntxuav, soj ntsuam, rov ua haujlwm) Cov txheej txheem no tsim nyog rau reflow ntawm A-sab ntawm PCB.
Nyias-zaj duab xis luam ntawv thaiv
Qhov hom thin-zaj duab xis Circuit Court feem ntau luam ntawm PET nrog cov nyiaj muab tshuaj. Muaj ob txoj hauv kev rau dhau thiab ua raws cov khoom siv hluav taws xob ntawm cov pa roj sib-zoo li lub voj voos. Ib qho hu ua cov txheej txheem txheej txheem ib txwm, uas yog, 3 txheej txheem kua nplaum (liab kua nplaum, nyiaj kua nplaum, encapsulant) lossis 2 txheej txheem kua nplaum (nyiaj kua nplaum, kua nplaum ua kua nplaum), lwm cov txheej txheem tshiab yog 1-kua nplaum --- raws li lub npe pom zoo, nws yog siv ib qho nplaum los ua kom tiav cov pasting ntawm cov khoom siv hluav taws xob, tsis txhob siv 3 lossis 2 lub nplaum. Tus yuam sij rau txoj kev tshiab no yog siv ib yam tshiab ntawm cov nplaum conductive, uas muaj cov khoom zoo conductive thiab cov txheej txheem cov khoom ntawm cov muab tshuaj txhuam; nws yog tag nrho nrog SMT uas twb muaj lawm muab tshuaj ua haujlwm txheej txheem thaum siv, tsis ntxiv ib qho khoom siv twg.
Txo qhov tsis ua tiav
Cov txheej txheem tsim, kov, thiab luam tawm cov ntawv sib dhos sib dhos (PCA) tuaj yeem tso cov tshuab kev ntxhov siab ntau rau ntawm pob, uas tuaj yeem ua rau ua tsis tiav. Raws li daim phiaj array pob ua ntau dua, nws yuav nyuaj rau teeb tsa kev ruaj ntseg rau cov theem no.
Tau ntau xyoo, monotonic dabtsi yog khoov txoj kev ntsuas tus qauv tau raug cov yam ntxwv tshwj xeeb ntawm pob. Qhov kev ntsuas no tau piav qhia nyob rau hauv IPC / JEDEC-9702" Monotonic Dab Tsi ntawm Cov Kab Sib Tsoo ntawm Kab Rov Tav Sib Txuas ntawm Cov Cav Vaj." Txoj kev ntsuas no qhia txog kev tawg lub zog ntawm cov ntawv luam tawm Circuit Court kab rov tav sib txuas ua ke hauv qab cov thauj khoom. Txawm li cas los xij, hom kev ntsuas no tsis tuaj yeem txiav txim siab qhov siab tshaj plaws uas tau tso cai yog yog dab tsi.
Ib qho kev sib tw rau kev tsim khoom thiab kev sib sau ua ke, thiab tshwj xeeb tshaj yog rau cov PCA tsis muaj hmoov txhuas, yog qhov tsis muaj peev xwm ntsuas cov kev ntxhov siab ncaj qha rau cov pob qij txuas. Kev siv hluav taws xob ntau tshaj plaws siv los piav qhia txog kev pheej hmoo ntawm cov khoom sib txuas ua ke yog qhov nro ntawm cov ntawv luam tawm Circuit nyob ib sab ntawm cov khoom tiv thaiv, raws li tau piav qhia nyob rau hauv IPC / JEDEC-9704 Cov Lus Qhia rau Ntsuas Kev Ntsuas ntawm Cov Ntawv Hluav Taws Xob.
Ob peb xyoos dhau los Intel tau paub txog qhov teeb meem no thiab tau pib tsim lub tswv yim sib txawv los faib cov teeb meem phem uas tshwm sim hauv kev muaj tiag. Lwm lub tuam txhab, xws li Hewlett-Packard, kuj tseem paub txog cov txiaj ntsig ntawm lwm txoj kev xeem thiab pib xav txog cov tswv yim zoo ib yam li Intel. Raws li ntau thiab ntau dua cov tuam ntxhab thiab cov neeg yuav khoom lees paub qhov tseem ceeb ntawm kev txiav txim siab tsis pub tsawg rau kev ua haujlwm tsis zoo thaum lub sijhawm tsim khoom, tuav thiab sim, cov qauv no tau ua ntau dua thiab ntau txaus siab.
Raws li kev siv cov khoom siv txhuas-txuas ntxiv mus kom nthuav dav, yog li qhov kev txaus siab ntawm cov neeg siv; vim tias ntau tus neeg siv ntsib cov teeb meem zoo.
Raws li cov paj tau nce ntxiv, IPC xav tias yuav tsum tau pab lwm cov tuam txhab tsim cov qauv sim uas yuav ua kom paub meej tias BGAs tsis tau puas thaum tsim khoom thiab sim. Qhov haujlwm no tau ua tiav los ntawm IPC 6-10d SMT Cov Hluav Taws Xob Ua Ntej Txuas Txoj Kev Ntsuam Xyuas Ua Haujlwm Pab Pawg thiab JEDEC JC-14.1 Substrate Kev Ntsuas Qhov Ntxig rau Cov Khoom Siv Ntim, uas tau ua tiav.
Txoj kev ntsuas no qhia txog yim qhov chaw nyob uas tau teem rau hauv ib lub voj ncig. Lub PCA nrog BGA rau qhov chaw nruab nrab ntawm cov ntawv luam tawm hauv Circuit Court yog muab tso rau hauv txoj kev uas cov seem tau sib tw lub ntsej muag ntawm cov pins pab txhawb nqa thiab lub nra them rau tom qab BGA. Tso cov leeg gage uas nyob ib sab mus rau ntawm ntu ib feem raws li kev thov ntsuas txheej ntawm IPC / JEDEC-9704.
Lub PCA yuav khoov ntawm qhov tsis sib haum theem, thiab qib ntawm kev puas tsuaj los ntawm kev hloov mus rau cov qib siab no tuaj yeem txiav txim siab los ntawm qhov kev soj ntsuam tsis ua haujlwm. Txoj kev ua rov qab tuaj yeem txiav txim siab qib theem ntawm qhov nro yam tsis muaj kev puas tsuaj, uas yog qhov tsis sib haum.
Ntim khoom
Cov ntawv ntim khoom feem ntau yog yas thiab ceramic. Lub tshav kub-dissipating ib feem ntawm cov tivthaiv yuav muaj hlau. Lub koob ntawm kev tivthaiv tau muab faib ua txhuas thiab tsis muaj txhuas.
Kab lus thiab cov duab hauv Is Taws Nem, yog muaj ib qho dab tsi thov hu rau peb kom tshem tawm.
NeoDen muab afullSMT los ua ke lineolutions, suav nrogSMTreflow cub, yoj soldering tshuab, de thiab chaw tshuab, cam muab tshuaj txhuam tshuab, PCB loader, PCB tsis tshaj tawm, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X-Ray tshuab, SMT los ua ke kab khoom, Cov khoom siv PCB tsim cov cuab yeej ATMT spare xeem, thiab lwm yam txhua lub tshuab SMT koj yuav xav tau, thov tiv tauj peb kom paub ntau ntxiv:
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