PCB yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob. Nws txoj haujlwm yog txhawm rau txhim kho cov khoom siv hluav taws xob xws li servos, resistors, thiab lub teeb-emitting diodes xav tau rau circuits ntawm lub rooj tsavxwm los ntawm kev ntxiv cov khoom siv hluav taws xob sib txuas thiab cov txheej txheem, thiab kom ua tiav cov teeb liab kis ntawm cov khoom siv davhlau ya nyob twg thiab cov khoom siv. Raws li cov kev xav tau, PCBs feem ntau yog muab faib ua ib lub vaj huam sib luag, ob lub tog vaj huam sib luag, thiab cov txheej txheem ntau txheej, cov txheej txheem ntau txheej tuaj yeem muab faib ntxiv rau.plaub txheej, rau txheej, lossis ntau dua (Uniwell circuits PCB ua thiab kev tsim khoom tuaj yeem ncav cuag 52 txheej). Ntau hom PCBs muaj qhov zoo sib txawv thiab daim ntawv thov scenarios, yog li thaum tsim PCBs, nws yuav tsum muaj kev nkag siab tob txog lawv cov txheej txheem txheej thiab kev ua haujlwm.
1, Ib lub vaj huam sib luag PCB
2, Ob chav sided PCB
Ob chav sided PCB yog ntau tshaj li ib lub vaj huam sib luag PCB, tshwj xeeb tshaj yog nyob rau hauv Circuit Court board tsim nrog complex inputs thiab outputs. Hauv ob sab PCB, qee qhov chaw yog tshwj tseg rau saum thiab hauv qab cov khaubncaws sab nraud povtseg ntawm cov txheej txheem thiab cov khoom siv hluav taws xob sib txuas, ua kom cov khoom ntom ntom zoo heev. Ob chav sided PCB kuj muaj ntau yam zoo hauv cov khoom siv, vim hais tias cov khoom ntawm ob sab PCB yog qhov yooj yim los kho thaum lub sij hawm teeb tsa thiab tsis tshua muaj teeb meem thaiv.
3, Ntau txheej PCB
Piv nrog rau ob-sided PCB, lub ntsiab kom zoo dua ntawm ntau txheej PCB yog tias nws tuaj yeem muaj ntau qhov chaw thiab ua haujlwm hauv lub ntim me me. Tsis tas li ntawd, ntau txheej PCB muaj kev ua tau zoo dua thiab kev cuam tshuam qis dua vim tias kev siv coplanar thev naus laus zis hauv PCB tuaj yeem xa cov teeb liab los ntawm cov txheej hauv av thiab cov txheej txheem hluav taws xob hauv lub dav hlau symmetrical, ua tiav cov txiaj ntsig ntawm kev tawm suab nrov thiab EMI cuam tshuam. Multilayer PCBs feem ntau suav nrog plaub, rau,yim, thiabkaum ob txheej, ntawm cov plaub lossis rau rau txheej PCBs tau siv dav hauv ntau qhov chaw xws li MCUs, kev tswj hwm kev lag luam cuam tshuam, thiab TV neeg hlau.
4, Kev ua haujlwm ntawm txhua txheej hauv ntau txheej PCB
1. Sab saum toj / hauv qab pem teb
Cov txheej sab saum toj thiab hauv qab feem ntau yog siv los nruab cov khoom siv me me xws li siv lead ua oscillators, electrolytic capacitors, thiab fuses. Tib lub sijhawm, lawv kuj yog lub luag haujlwm rau kev faib cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, thiab tuaj yeem siv rau tub rog SMT chips thiab DIP chips.
2. Teeb liab txheej
Lub teeb liab txheej yog siv los txuas tag nrho cov teeb liab kab, feem ntau suav nrog Via thiab Pad rau kev txhaj tshuaj siab, cov kab saum toj kawg nkaus, cov kab hauv qab, thiab cov kab hauv Inner Layer, thiab qee zaum nruab nrog kev so kom yooj yim kho thiab kho.
3. Lub zog txheej
Lub hwj chim txheej yog siv los txuas tag nrho cov kab hluav taws xob ntawm lub rooj tsav xwm hauv Circuit Court, thiab tseem tuaj yeem nruab cov lim fais fab, transistor choppers, thiab lwm yam kom tau txais lub zog tawm tswv yim, yog li ua tiav kev tswj xyuas tam sim no thiab qhov hluav taws xob.
4. Strata
Cov txheej hauv av yog txheej hauv qab ntawm lub rooj tsav xwm hauv Circuit Court, siv los txuas cov kab hauv av. Nws zoo ib yam li VCC Plane, tab sis nws yog siv los txuas tag nrho cov teeb liab txheej nrog rau lub zog thiab hauv av. Vim muaj ntau txoj kev sib txuas, nws feem ntau nyuaj dua li VCC Plane. Yog li ntawd, yuav tsum tau saib xyuas tshwj xeeb thaum tsim cov khoom siv hluav taws xob.