Circuit Board lossis print circuit board (PCB) los yog daim txiag thaiv kab laug sab (PWB), yog lub rooj tsav tsheb ua los ntawm cov thev dej uas tsis yog thaij thiab cov khoom kub thooj rau cov khoom kub xws li fiberglass. Cov laug cam no tseem hu ua substrates. Lub substrate lossis lub rooj tsav khoom muaj peev xwm tsuas muaj ib zaug xwb (ib lub rooj sib tham ib zaug xwb) los yog ntau tshaj ib txheej (lub rooj sib tham hauv pawg thooj siab). Ib hom hlau uas siv hluav taws xob xws li tooj yog siv los ua txoj kev taug kev los sis cov cim kom pab khiav cov hluav taws xob. Tom qab cov qauv kev thaij no muaj nyob rau ntawm lub substrate, nws yog lub npe hu ua "luam tawm Circuit Court Board".
Cov Keeb Kwm Ntawm Cov Ntawv Sau Tseg ntawm Circuit Court
Lub keeb kwm ntawm Circuit Board boards yuav rov qab mus rau mid-1930s, thaum ib tug kws tsav tsheb hauv Australian Paul Eislerinvented PCB thaum tsim lub xov tooj cua. Cov xov tooj cua no tom qab siv ntau yam hauv World War II los ntawm Tebchaws Meskas. Tom qab no, kev siv thiab daim ntawv thov ntawm Circuit Court boards vim coj mus muag hauv kev lag luam hauv tshuab hluav taws xob. Cov khoom ntiag tug no tsis muaj kev siv twj ywm kom txog thaum cov tshuab txuas hluav taws xob tiv thaiv. Cov khoom hauv tshuab hluav taws xob yuav yog los ntawm qhov-lossis qhov SMD. Dua cov cuab yeej siv los siv cov khoom txav ntawm lub rooj tsav xwm hauv vaj hauv tsev yuav ua tau los ntawm lub qhov tshuab los yog qhov tob technology. Cov khoom siv kuj muaj xws li cov laug ci hauv cov qauv ntawm cov hlau ci, cov khoom siv khom sab laug, cov khoom siv rau BGA (pob daim phiaj pob zeb) thiab lub plhaws (solder flux).
Circuit Board Design: Guidelines, Rules thiab Tools
Raws li tau hais los saum no, lub rooj sibtham luam tawm yog ib lub rooj sibtham uas ua los ntawm ib lossis ntau ntau cov txheej txheem cov khoom siv thaij (fiberglass, ceramic, high heat-resistant plastic lossis lwm yam khoom siv dielectric) nrog txoj kev taug kev nrog cov hlau xws li tooj liab. Thaum lub sij hawm tsim cov txheej txheem ntawm lub rooj tsav xwm hauv Circuit Court, cov cim ntawm tooj liab los yog lwm tus neeg xyuas pib yog tawm ntawm lub rooj tsav tsheb tawm ntawm cov khoom siv uas yuav tsum tau txhim kho kom ruaj rau cov khoom siv / tshuab hluav taws xob. Thaum tag nrho cov tshuab hluav taws xob muaj nyob rau hauv lub rooj tsav xwm hauv Circuit Court thiab lub rooj tsavxwm npaj txhij rau kev siv, nws yog hu ua luam ntawv Circuit Board (PCA) lossis luam tawm Circuit Board Board (PCBA).
PCB lossis Cov Ntawv Sau Tseg Cov Ntawv Sau Tseg
Tus qauv tam sim no rau kev tsim ntawm lub Rooj Tswjhwm Saib Circuit Court yog IPC-2221A. IPC 2221A tus qauv siv rau ntawm daim qauv tsim tawm tsim cov cai rau kev tsim khoom ntiag tug thiab cov txheej txheem zoo. Cov ntaub ntawv thiab cov txheej txheem yog siv rau txhua hom kev sib cog lus Circuit Court nrog rau cov txheej txheem PCBs thiab cov ntaub ntawv muaj xws li substrate cov ntaub ntawv, cov khoom siv, cov txheej txheem rau plating txheej, thickness conductor, qhov chaw kawm, dimensioning thiab tolerance cai thiab ntau dua.
Lwm lub rooj tsav xwm tsim tawm qauv yog IPC-2220 thiab IPC-9592. Nws yuav tsum tau sau tseg tias IPC thiab lwm cov kev qhia yuav muab cov ntaub ntawv hais txog kev ncaj nceeg rau pawg tswj hwm.
PCBA lossis Pawg Neeg Txiav Txim Siab Plaub Ntug
Rau kev txhim kho kom zoo thiab txhim khu kev pom zoo, cov tswv yim zoo thiab kev nkag siab txog PCB qhov kev paub txog cov tswv yim thiab kev nkag siab yooj yim ntawm kev ua haujlwm ntawm circuit yog xav tau. Thaum tsim ib lub qauv luam tawm Circuit Board board, ib tug yuav tsum ua tib zoo tu cov khoom siv substrate raws li hom kev siv tshuab thiab tshuab rau kev siv. Qhov dav ntawm qhov khoom siv ntawm lub rooj tsav xwm Circuit Court (Circuit Conductors) yuav tsum raug xaiv xaiv ntse ntsuav raws li kev pom qhov siab tshaj plaws ntawm qhov siab tau nce siab ntawm qhov sib txawv ntawm qhov tam sim no thiab qhov kev pom zoo. Lwm cov ntsiab lus yuav tsum nco ntsoov nrog lub tswv yim tsim kho cov cuab yeej tsim tawm CTE, cov nqi thiab cov khoom siv dielectric. Tus designer xav kom zoo zoo sib npaug cov kev txwv nrog kev cia siab thiab kev xav tau. Tsis tas li ntawd, lub qhov ncauj ntawm lub qhov ncauj thiab ntawm qhov yuav tsum ua tib zoo xaiv.
Cov ntawv luam tawm Circuit Court Board
Daim duab kos yog ib daim duab uas qhia thiab piav qhia seb yuav ua li cas thiab cov khoom siv hluav taws xob yuav ua kom tiav li cas. Txhua feem ntawm daim duab ntawm daim duab ntawm daim duab tso cai yog sawv cev ntawm lub cim. Ua ib daim duab ntawm daim duab ua ntej cov khoom tsim tawm tseem ceeb heev. Nws muab ib lub tswv yim ntawm seb qhov Circuit Court yuav ua haujlwm li cas thiab yuav ua li cas kom ua tau raws li lub hom phiaj. Daim duab ntawm daim duab yog qhov tseem ceeb rau cov khoom siv tshiab, cuab yeej lossis gadget.
Yuav ua li cas kos ib daim duab circuit?
PCB Layout
Teeb duab hauv daim duab no tsis yog qhov nyuaj yog tias koj paub qhov tsim nyog. Nov yog qee cov lus qhia thiab cov txheej txheem:
Kawm thiab to taub tag nrho cov cim thiab cov ntawv sau rau cov khoom siv hauv tshuab uas siv rau hauv daim duab.
Siv tus pas ntsuas, kos cov hlua txuas tau raws li kab ncaj nraim. Siv cov cim nram qab no: 'blob' () ntawm txhua qhov sib txuas ntawm cov xov tooj, daim ntawv cim (resistors, capsitors, diodes etc) nrog lawv qhov tseem ceeb, qhov zoo (+) mov yuav tsum nyob rau saum toj thiab qhov tsis zoo (-) mov hauv qab . Kev tsis zoo yog feem ntau yog 0V, pes tsawg volts.
Rau txoj kab teeb meem ntawm txoj kab, pib ntawm sab laug mus rau sab xis. Yog li ntawd qhov teeb meem khiav tawm ntawm sab laug mus rau txoj cai (inputs thiab ntawm kev tswj yuav tsum yog nyob sab laug, tawm ntawm sab xis).
Cov Txwj Luam Pawg Neeg Los Sib Cuam Tshaj Plaws
Mounting khoom nyob rau hauv lub rooj tsav xwm hauv Circuit Court thiab kev npaj rau nws siv yog qhov hu ua circuit board assembly. Lub rooj sib txoos ntawm lub rooj sib txig ntawm Circuit Court yuav siv los ntawm qhov tshuab ua ke los yog tshuab siv tshuab (SMT) los yog sib xyaw rau ob qho tib si. Thaum lub Rooj Tswjhwm Saib Circuit Court tau muab sib xyaw nrog cov khoom ua ke nws npaj txhij rau kev sim thiab thaum kawg yuav tsum tau sib sau ua ke nrog cov khoom. Tab sis nws tsis tau lees tias lub rooj sib tham ntawm Circuit Board yuav muab 100% zero defect ntau lawm. Yuav muaj kev tsis txaus siab thiab cov kev kho no yuav tsum rov ua haujlwm / kho.
Tshooj thiab daim duab ntawm hauv internet, yog tias muaj kev cuam tshuam dab tsi hu peb mus rho tawm.
NeoDen muab tag nrho cov smt kev sib txuas daws teeb meem, xws li SMT reflow qhov cub, yoj tes laug tshuab, de laim cov tshuab luam ntawv, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X-hluav taws xob tshuab, SMT los ua ke kab khoom siv, PCB Cov Khoom Pab Khoom Siv Nruab Nruag SMT tej yam zoo li txhua yam SMT cov cav koj xav tau, thov hu rau peb kom paub ntxiv:
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