Printed Circuit Board (PCB) yog cov khoom siv hluav taws xob yooj yim siv dav hauv ntau yam khoom siv hluav taws xob thiab lwm yam khoom siv. PCB qee zaum hu ua PWB (Printed Wire Board). Nws tau siv ntau dua hauv Hong Kong thiab Nyiv ua ntej, tab sis tam sim no nws tsawg dua (qhov tseeb, PCB thiab PWB txawv). Hauv Western lub teb chaws thiab cheeb tsam, nws feem ntau hu ua PCB. Nyob rau sab hnub tuaj, nws muaj ntau lub npe vim muaj ntau lub teb chaws thiab cheeb tsam. Piv txwv li, nws yog feem ntau hu ua lub rooj tsav xwm luam ntawv hauv Suav teb av loj (yav tas los hu ua pawg thawj coj saib xyuas), thiab feem ntau hu ua PCB hauv Taiwan. Circuit boards yog hu ua hluav taws xob (circuit) substrates hauv Nyiv thiab substrates hauv South Kauslim.
PCB yog kev txhawb nqa ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib txuas ntawm cov khoom siv hluav taws xob, feem ntau yog kev txhawb nqa thiab kev sib tshuam. Ntshiab los ntawm sab nraud, txheej txheej ntawm lub rooj tsav xwm Circuit Court feem ntau muaj peb xim: kub, nyiaj, thiab lub teeb liab. Muab faib los ntawm tus nqi: kub yog qhov kim tshaj plaws, nyiaj yog thib ob, thiab lub teeb liab yog qhov pheej yig tshaj. Txawm li cas los xij, cov xaim hauv lub rooj tsav xwm hauv Circuit Court yog cov tooj liab ntshiab, uas yog tooj liab liab.
Nws tau hais tias tseem muaj ntau cov hlau tseem ceeb ntawm PCB. Nws tau tshaj tawm tias, qhov nruab nrab, txhua lub xov tooj ntse muaj 0.05g kub, 0.26g nyiaj, thiab 12.6g tooj liab. Cov ntsiab lus kub ntawm lub laptop yog 10 npaug ntawm lub xov tooj ntawm tes!
Raws li kev txhawb nqa rau cov khoom siv hluav taws xob, PCBs xav tau cov khoom sib txuas ntawm qhov chaw, thiab ib feem ntawm cov txheej tooj liab yuav tsum raug nthuav tawm rau kev sib tsoo. Cov khaubncaws sab nraud povtseg no yog hu ua pads. Cov ntaub qhwv feem ntau yog cov duab plaub lossis puag ncig nrog thaj tsam me me. Yog li ntawd, tom qab lub npog ntsej muag yog pleev xim rau, tsuas yog tooj liab ntawm lub ncoo yog raug rau saum huab cua.
Cov tooj liab siv hauv PCB tau yooj yim oxidized. Yog hais tias cov tooj liab ntawm lub ncoo yog oxidized, nws yuav tsis tsuas yog nyuaj rau solder, tab sis kuj lub resistivity yuav zoo heev, uas yuav cuam tshuam rau kev ua tau zoo ntawm cov khoom kawg. Yog li ntawd, lub ncoo yog plated nrog inert hlau kub, los yog saum npoo yog them nrog ib txheej ntawm cov nyiaj los ntawm cov txheej txheem tshuaj, los yog ib tug tshwj xeeb chemical zaj duab xis yog siv los npog cov tooj liab txheej los tiv thaiv lub ncoo los ntawm kev sib cuag huab cua. Tiv thaiv oxidation thiab tiv thaiv lub ncoo, kom nws tuaj yeem ua kom muaj txiaj ntsig ntawm cov txheej txheem tom ntej.
1. PCB tooj liab clad laminate
Copper clad laminate yog ib lub phaj zoo li cov khoom ua los ntawm impregnating iav fiber ntau daim ntaub los yog lwm yam ntaub ntawv reinforcing nrog resin ntawm ib sab los yog ob sab nrog tooj liab ntawv ci thiab kub nias.
Siv iav fiber ntau daim ntaub-raws li tooj liab clad laminate ua piv txwv. Nws cov ntaub ntawv tseem ceeb yog tooj liab ntawv, iav fiber ntau daim ntaub, thiab epoxy resin, uas suav txog li 32%, 29% thiab 26% ntawm cov nqi khoom, feem.
Circuit Board Hoobkas
Copper clad laminate yog cov khoom siv tseem ceeb ntawm cov ntawv luam tawm hauv Circuit Court, thiab cov ntawv luam tawm Circuit Court boards yog qhov tseem ceeb ntawm cov khoom siv hluav taws xob rau feem ntau cov khoom siv hluav taws xob kom ua tiav cov kev sib txuas hauv Circuit Court. Nrog kev txhim kho txuas ntxiv ntawm thev naus laus zis, qee qhov tshwj xeeb hluav taws xob tooj liab clad laminates tuaj yeem siv tau nyob rau xyoo tas los no. Ncaj qha tsim cov khoom siv hluav taws xob luam tawm. Cov conductors siv nyob rau hauv cov ntawv luam Circuit Court boards feem ntau yog ua los ntawm nyias cov ntawv zoo li refined tooj liab, uas yog, tooj liab ntawv ci nyob rau hauv ib tug nqaim siab.
2. PCB Immersion Kub Circuit Board
Yog tias kub thiab tooj liab nyob rau hauv kev sib cuag ncaj qha, yuav muaj kev cuam tshuam lub cev ntawm electron migration thiab diffusion (kev sib raug zoo ntawm qhov sib txawv ntawm qhov sib txawv), yog li ib txheej ntawm "nickel" yuav tsum tau electroplated raws li txheej thaiv, thiab ces kub yog electroplated rau. sab saum toj ntawm npib tsib xee, yog li peb feem ntau hu nws Electroplated kub, nws lub npe tiag tiag yuav tsum hu ua "electroplated npib tsib xee kub".
Qhov sib txawv ntawm cov kub kub thiab mos kub yog cov muaj pes tsawg leeg ntawm cov txheej txheem kawg ntawm kub uas yog plated rau. Thaum kub plating, koj tuaj yeem xaiv electroplate ntshiab kub lossis alloy. Vim hais tias lub hardness ntawm ntshiab kub yog mos, nws kuj hu ua "mos kub". Vim tias "kub" tuaj yeem tsim cov hlau zoo nrog "txhuas", COB yuav tsum tau tshwj xeeb tshaj yog xav tau cov tuab ntawm cov txheej kub no thaum ua cov hlau txhuas. Tsis tas li ntawd, yog tias koj xaiv electroplated kub-nickel alloy los yog kub-cobalt alloy, vim hais tias cov alloy yuav nyuaj dua li cov kub ntshiab, nws tseem hu ua "hard kub".
Circuit Board Hoobkas
Cov txheej kub-plated yog dav siv nyob rau hauv cov khoom pads, kub ntiv tes, thiab connector shrapnel ntawm lub Circuit Court board. Cov motherboards ntawm cov xov tooj ntawm tes uas siv dav tshaj plaws yog cov laug cam feem ntau yog cov kub plated, cov laug cam rau kub, lub computer motherboards, suab thiab me me digital circuit boards feem ntau tsis yog kub plated boards.
Kub yog kub tiag. Txawm hais tias tsuas yog txheej nyias nyias yog plated, nws twb tso nyiaj rau ze li ntawm 10% ntawm tus nqi ntawm lub rooj tsavxwm. Kev siv cov kub ua ib txheej plating yog ib qho rau kev yooj yim vuam thiab lwm yam rau kev tiv thaiv corrosion. Txawm tias tus ntiv tes kub ntawm lub cim xeeb stick uas tau siv rau ob peb xyoos tseem flickers li yav dhau los. Yog tias koj siv tooj liab, txhuas, lossis hlau, nws yuav xeb sai sai rau hauv cov khoom seem. Tsis tas li ntawd, tus nqi ntawm cov phaj kub-plated yog qhov siab, thiab lub vuam lub zog tsis zoo. Vim tias cov txheej txheem electroless nickel plating yog siv, qhov teeb meem ntawm cov disks dub yuav tshwm sim. Cov nickel txheej yuav oxidize lub sij hawm, thiab kev cia siab rau lub sij hawm ntev kuj yog ib qho teeb meem.
3. PCB Immersion Silver Circuit Board
Immersion Silver yog pheej yig dua li Immersion Kub. Yog tias PCB muaj kev sib txuas ua haujlwm thiab xav tau los txo cov nqi, Immersion Silver yog qhov kev xaiv zoo; ua ke nrog Immersion Silver qhov zoo flatness thiab kev sib cuag, ces cov txheej txheem Immersion Silver yuav tsum tau xaiv.
Immersion Silver muaj ntau daim ntawv thov hauv cov khoom sib txuas lus, tsheb, thiab lub computer peripherals, thiab nws kuj muaj cov ntawv thov hauv high-speed teeb liab tsim. Txij li thaum Immersion Silver muaj cov khoom hluav taws xob zoo uas lwm cov kev kho deg tsis tuaj yeem sib xws, nws kuj tuaj yeem siv rau hauv cov teeb liab siab. EMS pom zoo kom siv cov txheej txheem immersion nyiaj vim tias nws yooj yim rau kev sib sau thiab muaj kev kuaj xyuas zoo dua. Txawm li cas los xij, vim muaj qhov tsis xws luag xws li tarnishing thiab solder sib koom voids, qhov kev loj hlob ntawm immersion nyiaj tau qeeb (tab sis tsis txo).
nthuav
Cov ntawv luam tawm Circuit Board yog siv los ua cov khoom sib txuas ntawm cov khoom siv hluav taws xob sib xyaw ua ke, thiab cov khoom siv hluav taws xob zoo yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom siv hluav taws xob ntse. Ntawm lawv, plating zoo ntawm cov ntawv luam tawm Circuit Board yog qhov tseem ceeb tshwj xeeb. Electroplating tuaj yeem txhim kho kev tiv thaiv, solderability, conductivity thiab hnav tsis kam ntawm Circuit Board. Hauv kev tsim cov txheej txheem ntawm cov ntawv luam tawm, electroplating yog ib qho tseem ceeb. Qhov zoo ntawm electroplating muaj feem xyuam rau kev ua tiav lossis tsis ua haujlwm ntawm tag nrho cov txheej txheem thiab kev ua haujlwm ntawm lub rooj tsavxwm Circuit Court.
Cov txheej txheem electroplating tseem ceeb ntawm pcb yog tooj liab plating, tin plating, npib tsib xee plating, kub plating thiab lwm yam. Copper electroplating yog qhov yooj yim plating rau kev sib txuas hluav taws xob ntawm cov laug cam; tin electroplating yog qhov tsim nyog rau kev tsim cov high-precision circuits raws li cov txheej txheem tiv thaiv corrosion hauv cov qauv ua; npib tsib xee electroplating yog electroplate ib nickel barrier txheej ntawm lub rooj tsavxwm Circuit Court tiv thaiv tooj liab thiab kub Mutual dialysis; electroplating kub tiv thaiv passivation ntawm npib tsib xee nto kom tau raws li kev ua tau zoo ntawm soldering thiab corrosion kuj ntawm lub rooj tsav xwm Circuit Court.