SMT kev paub yooj yim
1. Nto Mount Technology-SMT (Nto Mount Technology)
SMT yog dab tsi:
Feem ntau hais txog kev siv cov khoom siv sib dhos tsis siv neeg los txuas ncaj qha thiab solder chip-type thiab miniaturized leadless los yog luv-lead saum npoo los ua ke cov khoom siv / khoom siv (xws li SMC / SMD, feem ntau hu ua chip Cheebtsam) rau saum npoo ntawm lub rooj tsavxwm luam tawm. (PCB) Los yog lwm yam khoom siv hluav taws xob sib dhos rau ntawm txoj hauj lwm teev nyob rau saum npoo ntawm lub substrate, tseem hu ua nto mount technology los yog nto mount technology, hu ua SMT (Surface Mount Technology).
SMT (Surface Mount Technology) yog ib qho kev lag luam tawm tshiab hauv kev lag luam hluav taws xob.Nws txoj kev loj hlob sai thiab kev loj hlob sai yog kev hloov pauv hauv kev lag luam hluav taws xob sib dhos.Nws yog lub npe hu ua "Rising Star" ntawm kev lag luam hluav taws xob.Nws ua rau kev sib dhos hauv hluav taws xob ntau thiab ntau dua Qhov nrawm dua thiab yooj yim dua, kev hloov pauv ntawm ntau yam khoom siv hluav taws xob, kev sib koom ua ke siab dua, thiab tus nqi pheej yig dua, tau ua rau muaj txiaj ntsig zoo rau kev loj hlob ntawm IT ( Information Technology) kev lag luam.
Surface mount technology yog tsim los ntawm kev tsim technology ntawm cov khoom siv hluav taws xob.Txij xyoo 1957 txog rau tam sim no, kev txhim kho ntawm SMT tau dhau los ntawm peb theem:
Thawj theem (1970-1975): Lub hom phiaj tseem ceeb ntawm kev ua haujlwm yog siv cov khoom siv me me hauv kev tsim khoom thiab tsim hluav taws xob hybrid (hu ua tuab zaj duab xis circuits hauv Suav teb).Los ntawm qhov kev xav no, SMT tseem ceeb heev rau kev sib koom ua ke Cov txheej txheem tsim khoom thiab kev tsim kho thev naus laus zis ntawm circuits tau ua rau muaj txiaj ntsig zoo;tib lub sijhawm, SMT tau pib siv dav hauv cov khoom siv pej xeem xws li quartz electronic watches thiab tshuab xam zauv hluav taws xob.
Qhov thib ob theem (1976-1985): los txhawb qhov ceev ceev miniaturization thiab multi-functionalization ntawm cov khoom siv hluav taws xob, thiab pib siv dav hauv cov khoom xws li lub koob yees duab video, headset radios thiab electronic cameras;Nyob rau tib lub sijhawm, ntau cov cuab yeej siv hluav taws xob rau kev sib dhos saum npoo tau tsim Tom qab kev txhim kho, kev teeb tsa thev naus laus zis thiab cov ntaub ntawv txhawb nqa ntawm cov khoom siv nti kuj tau paub tab, tso lub hauv paus rau kev loj hlob ntawm SMT.
Qhov thib peb theem (1986-tam sim no): Lub hom phiaj tseem ceeb yog txo cov nqi thiab ntxiv txhim kho kev ua tau zoo-tus nqi piv ntawm cov khoom siv hluav taws xob.Nrog rau kev loj hlob ntawm SMT thev naus laus zis thiab kev txhim kho ntawm cov txheej txheem kev ntseeg siab, cov khoom siv hluav taws xob siv hauv kev ua tub rog thiab kev nqis peev (tsheb computer kev sib txuas lus cov cuab yeej siv khoom lag luam) tau tsim sai heev.Nyob rau tib lub sijhawm, ntau cov khoom siv sib dhos ua ke thiab cov txheej txheem txheej txheem tau tshwm sim los ua cov khoom siv nti Cov kev loj hlob sai ntawm kev siv PCBs tau ua kom cov nqi ntawm cov khoom siv hluav taws xob poob qis.
2. Nta ntawm SMT:
① Kev sib dhos siab ceev, me me thiab lub teeb yuag ntawm cov khoom siv hluav taws xob.Qhov ntim thiab qhov hnyav ntawm SMD cov khoom tsuas yog kwv yees li 1/10 ntawm cov tsoos plug-in cov khoom.Feem ntau, tom qab SMT tau txais kev pom zoo, qhov ntim ntawm cov khoom siv hluav taws xob raug txo los ntawm 40% ~ 60% thiab qhov hnyav yog txo los ntawm 60%.~ 80%.
② Muaj kev ntseeg siab, muaj zog tiv thaiv kev vibration, thiab tsis tshua muaj kev sib koom ua ke tsis zoo.
③ Cov yam ntxwv zoo siab, txo cov hluav taws xob thiab xov tooj cua cuam tshuam.
④ Nws yog ib qho yooj yim kom paub automation thiab txhim kho ntau lawm efficiency.
⑤ Txuag cov ntaub ntawv, lub zog, khoom siv, cov neeg ua haujlwm, lub sijhawm, thiab lwm yam.
3. Kev faib tawm ntawm cov txheej txheem saum npoo av: Raws li cov txheej txheem sib txawv ntawm SMT, SMT tau muab faib ua cov txheej txheem xa tawm (yoj vuam) thiab cov txheej txheem muab tshuaj txhuam (reflow soldering).
Lawv qhov sib txawv tseem ceeb yog:
① Cov txheej txheem ua ntej patching yog txawv.Cov qub siv cov nplaum nplaum thiab cov tom kawg siv cov tshuaj txhuam hniav.
② Cov txheej txheem tom qab patching yog txawv.Cov qub dhau los ntawm qhov cub reflow los kho cov kua nplaum thiab muab tshuaj txhuam rau hauv PCB board.Wave soldering yuav tsum tau;tom kawg dhau los ntawm qhov cub reflow rau soldering.
4. Raws li cov txheej txheem ntawm SMT, nws tuaj yeem muab faib ua hom hauv qab no: txheej txheem mounting ib leeg, txheej txheem ob sab mounting, txheej txheem ntim ob sab sib xyaw
① Sib sau ua ke siv cov khoom siv saum npoo av
A. Kev sib dhos ib leeg nrog tsuas yog nto mounting (ib leeg-ib sab mounting txheej txheem) Txheej txheem: tshuaj ntsuam luam ntawv solder paste → mounting Cheebtsam → reflow soldering
B. Ob sab sib dhos nrog tsuas yog nto mounting (ob chav sided mounting txheej txheem) txheej txheem: tshuaj ntsuam luam ntawv solder paste → mounting Cheebtsam → reflow soldering → rov qab sab → screen printing solder paste → mounting Cheebtsam → reflow soldering
② Sib sau ua ke nrog cov khoom siv saum npoo av ntawm ib sab thiab sib xyaw ntawm cov khoom siv saum npoo av thiab cov khoom perforated nyob rau sab nraud (ob chav sib xyaw ua ke txheej txheem)
Txheej txheem 1: Kev tshuaj ntsuam luam ntawv solder paste (sab saum toj sab) → mounting Cheebtsam → reflow soldering → rov qab sab → dispensing (sab hauv qab) → mounting Cheebtsam → kub curing → rov qab sab → tes-ntxig cov khoom → yoj soldering
Txheej txheem 2: Kev tshuaj ntsuam luam ntawv solder paste (sab saum toj sab) → mounting Cheebtsam → reflow soldering → tshuab plug-in (sab saum toj sab) → rov qab sab → dispensing (sab hauv qab) → thaj → kub kho → yoj soldering
③ Sab saum toj nto siv cov khoom perforated thiab hauv qab saum npoo siv cov khoom siv saum npoo av (ob tog sib xyaw ua ke txheej txheem)
Txheej txheem 1: Dispensing → mounting Cheebtsam → kub kho → rov qab sab → tes inserting Cheebtsam → yoj soldering
Txheej txheem 2: Tshuab ntsaws → rov qab sab → dispensing → thaj → kub kho → yoj soldering
Cov txheej txheem tshwj xeeb
1. Ib leeg-sab saum npoo sib dhos txheej txheem ntws Siv cov tshuaj pleev xim rau mount cov khoom thiab reflow soldering
2. Ob chav sided nto los ua ke txheej txheem ntws A sab siv cov tshuaj nplaum rau mount cov khoom thiab reflow soldering nrov plig plawg B sab siv solder paste rau mount cov khoom thiab reflow soldering
3. Ib leeg-sab sib xyaw ua ke (SMD thiab THC nyob rau tib sab) Ib sab siv solder paste rau mount SMD reflow soldering A sab interposing THC B sab yoj soldering
4. Ib sab sib xyaw ua ke (SMD thiab THC nyob rau ob sab ntawm PCB) Siv SMD nplaum rau ntawm B sab rau mount SMD nplaum curing nrov plig plawg A sab ntxig THC B sab yoj vuam
5. Ob sab sib xyaw mounting (THC nyob rau sab A, ob sab A thiab B muaj SMD) Siv cov nplaum nplaum rau sab A rau mount SMD thiab ces ntws solder flip board B sab siv SMD kua nplaum rau mount SMD kua nplaum curing flip board A sab rau ntxig THC B Nto yoj soldering
6. Ob tog sib xyaw ua ke (SMD thiab THC ntawm ob sab ntawm A thiab B) Ib sab siv cov tshuaj txhuam hniav rau mount SMD reflow soldering nrov plig plawg B sab siv SMD kua nplaum mounting SMD kua nplaum curing nrov plig plawg A sab ntxig THC B sab yoj soldering B- sab phau ntawv welding
Tsib.SMT cov ntsiab lus kev paub
Feem ntau siv SMT tivthaiv hom:
1. Nto mount resistors thiab potentiometers: rectangular nti resistors, cylindrical ruaj resistors, me me ruaj resistor tes hauj lwm, nti potentiometers.
2. Nto mount capacitors: multilayer nti ceramic capacitors, tantalum electrolytic capacitors, txhuas electrolytic capacitors, mica capacitors
3. Nto mount inductors: hlau-hloov nti inductors, multilayer nti inductors
4. Sib nqus hlaws: Chip Bead, Multilayer Chip Bead
5. Lwm yam nti Cheebtsam: nti multilayer varistor, nti thermistor, nti nto yoj lim, nti multilayer LC lim, nti multilayer ncua kab
6. Nto mount semiconductor li: diodes, cov qauv me me ntim cov transistors, cov qauv me me ntim cov khoom sib xyaw ua ke SOP, leaded yas pob integrated circuits PLCC, quad tiaj pob QFP, ceramic nti cab kuj, rooj vag array spherical pob BGA, CSP (Chip Scale Package)
NeoDen muab tag nrho SMT sib dhos kab kev daws teeb meem, suav nrog SMT reflow qhov cub, yoj lub tshuab siv lub tshuab, xaiv thiab tso tshuab, tshuab luam ntawv muab tshuaj txhuam, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X-Ray tshuab, SMT sib dhos kab khoom, PCB ntau lawm Equipment SMT spare qhov chaw, thiab lwm yam yam SMT tshuab koj xav tau, thov hu rau peb kom paub ntxiv:
Post lub sij hawm: Jul-23-2020