Taw qhia rau qhov zoo thiab qhov tsis zoo ntawmBGA PCBtxiag ntoo
Ib daim phiaj pob sib xyaw (BGA) luam tawm cov boardcuita board (PCB) yog lub npoo mount pob pcb tsim tshwj xeeb rau kev sib ncig ua ke. BGA cov laug cam yog siv hauv cov ntawv thov uas cov npoo av yog ruaj khov, piv txwv li, hauv cov khoom siv xws li microprocess. Cov no yog cov ntawv luam tawm cov ntawv luam tawm hluav taws xob thiab tsis tuaj yeem siv. BGA cov laug cam muaj ntau dua kev sib txuas lus dua li lub pcbs tsis tu ncua. Txhua kis ntawm BGA Board tuaj yeem tsim cov kev sib raug zoo ntawm nws tus kheej. Tag nrho cov kev sib txuas ntawm cov PCBs kis tau tawm hauv daim ntawv ntawm ib qho kev sib dhos sib txawv lossis cov kab sib chaws. Cov PCBs no tau tsim kom tag nrho cov underside tag nrho tuaj yeem siv tau yooj yim hloov chaw tsuas yog siv cov chaw peripheral.
Cov pins ntawm bga pob yog luv dua li ib lub pcb tsis tu ncua vim tias nws tsuas muaj ib qho hom puag ncig. Vim li no, nws muab kev ua tau zoo dua ntawm kev nrawm dua. BGA vuam yuav tsum muaj qhov tseeb tswj thiab yog kev coj ua ntau zaus los ntawm cov tshuab automated. Qhov no yog vim li cas BGA cov cuab yeej tsis haum rau lub tshuab (socketing.
Soldering Tshuab BGA Ntim
Ib qho cub tawg yog siv los ham BGA pob rau cov ntawv luam tawm Circuit Court. Thaum lub melting ntawm cov hlua khau pib sab hauv qhov cub, qhov nro nyob rau saum npoo ntawm molten pob ua kom lub pob ua ke nyob rau hauv nws txoj hauj lwm tiag tiag ntawm tus PCB. Cov txheej txheem no txuas ntxiv mus kom txog thaum pob tau muab tshem tawm los ntawm qhov cub, txias thiab dhau los ua cov khoom. Txhawm rau kom muaj cov txheej txheem ruaj ruaj cam, tshuaj tswj cov txheej txheem soldering rau BGA pob yog qhov tsim nyog heev thiab yuav tsum ncav cuag qhov uas yuav tsum tau kub. Thaum tsim nyog cov tswv yim siv tau siv, nws tseem tshem tawm cov kev ua tau ntawm luv luv.
Qhov Zoo ntawm BGA Ntim
Muaj ntau ntau qhov zoo rau BGA ntim, tab sis tsuas yog cov kev qhia saum toj tshaj plaws yog cov ncauj lus kom ntxaws hauv qab no.
1. Bga ntim siv PCB qhov chaw ua tau zoo: kev siv BGA ntim cov lus qhia kev siv cov khoom me me thiab cov hneev me me. Cov pob no tseem yuav pab txuag chaw txaus rau kev hloov kho hauv PCB, yog li nce nws txoj kev ua tau zoo.
2. Txhim kho hluav taws xob thiab cov thermal ua tau zoo: qhov loj me ntawm BGA pob yog me heev, yog li cov PCB no tsis tshua muaj cua sov thiab cov txheej txheem dissipation yooj yim los siv. Thaum twg cov khoom cua silicon yog mounted nyob rau sab saum toj, feem ntau ntawm cov cua sov yog pauv ncaj qha rau pob kab sib tham. Txawm li cas los xij, nrog silicon tuag mounted rau hauv qab, silicon tuag txuas rau sab saum toj ntawm pob. Qhov no yog vim li cas nws tau suav hais tias yog qhov kev xaiv zoo tshaj plaws rau kev txias tshuab. Tsis muaj pendable lossis tsis yooj yim hauv BGA pob, yog li lub siab ntawm cov PCBs no tau nce ntxiv hluav taws xob.
3. Txhim kho cov txiaj ntsig tsim tau los ntawm kev txhim kho Soldering: Cov pob khoom ntawm BGA yog qhov loj txaus kom lawv muab cov ham yooj yim txaus los daws. Yog li ntawd, yooj yim ntawm vuam thiab tuav ua rau nws nrawm nrawm rau kev tsim khoom. Cov ntaub qhwv loj ntawm cov pcbs no tseem tuaj yeem ua haujlwm yooj yim yog tias xav tau.
4. Txo txoj kev pheej hmoo ntawm kev puas tsuaj: BGA pob yog ruaj khov-xeev soldered, yog li muab cov detability zoo thiab kav ntev rau txhua yam mob.
ntawm 5. Txo cov nqi: Cov txiaj ntsig saum toj no pab txo tus nqi ntawm BGA ntim. Kev siv cov khoom lag luam hluav taws xob ua kom txuag tau cov ntaub ntawv thiab txhim kho cov khoom siv thermoelectric, pab kom muaj cov khoom siv hluav taws xob zoo thiab txo cov khoom tsis zoo.
Qhov tsis zoo ntawm BGA ntim
Cov hauv qab no yog qee qhov tsis zoo ntawm BGA pob, piav qhia hauv kev nthuav dav.
1. Kev kuaj xyuas cov txheej txheem yog qhov nyuaj heev: nws nyuaj heev los tshuaj xyuas qhov Circuit Court thaum cov txheej txheem ntawm cov txheej txheem rau BGA pob. Nws yog qhov nyuaj heev los xyuas rau tej yam ua txhaum nyob hauv BGA pob. Tom qab txhua tivthaiv yog soldered, lub pob yog nyuaj rau kev nyeem thiab tshuaj xyuas. Txawm hais tias muaj kev ua yuam kev thaum lub sijhawm kuaj xyuas, nws yuav nyuaj rau kho nws. Yog li ntawd, los pab txhawb kev kuaj, kim heev ct scan thiab xoo hluav taws xob thev naus laus zis siv.
2. Kev ntseeg tau cov teeb meem: BGA pob muaj kev ntxhov siab. Qhov frealility no yog vim yog khoov kev ntxhov siab. Qhov kev ntxhov siab no ua rau muaj kev cuam tshuam cov teeb meem hauv cov ntawv tshaj tawm. Txawm hais tias cov teeb meem ntseeg tau muaj tsawg tsawg hauv BGA pob, qhov ua tau yeej yog tam sim no.
BGA Packaged RayPcb Technology
Cov thev naus laus zis feem ntau siv rau BGA pob Qhov loj siv los ntawm RayPCB yog 0.3mm, thiab qhov tsawg kawg nkaus uas yuav tsum muaj nyob ntawm 0.2 hli. Yam tsawg kawg nkaus spacing ntawm ob lub pob sib txawv bga (yog khaws cia ntawm 0.2 hli). Txawm li cas los xij, yog tias cov cai yuav sib txawv, thov hu rau RayPcb rau kev hloov pauv rau cov ntsiab lus xav tau. Qhov kev ncua deb ntawm BGA pob loj yog qhia hauv daim duab hauv qab no.
Yav Tom Ntej BGA Ntim
Nws yog qhov tsis lees paub tias BGA ntim yuav ua rau hluav taws xob thiab khoom siv hluav taws xob yav tom ntej. Lub neej tom ntej ntawm BGA ntim yog cov khoom thiab nws yuav nyob hauv kev ua lag luam rau qee lub sijhawm. Txawm li cas los xij, tus nqi tam sim no ntawm thev naus laus zis tau nrawm heev, thiab nws yuav muaj lwm yam luam tawm Circuit Court Board uas yog qhov ua tau ntau dua li BGA ntim. Txawm li cas los xij, txoj kev kho tshiab hauv thev naus laus zis tau ua rau muaj kev kub ntxhov thiab cov nqi teeb meem rau cov hluav taws xob hluav taws xob. Yog li ntawd, nws tau kwv yees tias ntim hauv BGA yuav mus ntev heev hauv kev lag luam hluav taws xob vim muaj txiaj ntsig zoo thiab cov laj thawj tsis txaus ntseeg thiab cov laj thawj tsis txaus ntseeg. Ib qho ntxiv, muaj ntau hom pob zeb bga, thiab qhov sib txawv ntawm lawv hom kev nce qhov tseem ceeb ntawm pob ntawv. Piv txwv li, yog qee hom pob bga tsis haum rau cov khoom hluav taws xob, lwm hom pob bga yuav raug siv.