cov luam tawm hauv Circuit Court board (PCB) yog lub hauv paus ntawm lub cev lossis lub platform uas cov khoom siv hluav taws xob tuaj yeem raug soldered. Cov kab tooj liab txuas cov khoom sib txuas no rau ib leeg, tso cai rau cov ntawv luam tawm Circuit Board (PCB) ua nws txoj haujlwm raws li tus qauv tsim.

Cov ntawv luam tawm Circuit Board yog lub hauv paus ntawm cov khoom siv hluav taws xob. Nws tuaj yeem yog txhua yam duab thiab qhov loj me, nyob ntawm daim ntawv thov ntawm cov khoom siv hluav taws xob. Feem ntau cov khoom siv substrate / substrate rau PCB yog FR-4. FR-4 raws li PCBs feem ntau pom muaj nyob rau hauv ntau yam khoom siv hluav taws xob, thiab lawv cov kev tsim khoom muaj ntau. Piv nrog ntau txheej PCBs, ib sab thiab ob sab PCB yog yooj yim rau kev tsim.

FR-4 PCB yog ua los ntawm iav fiber ntau thiab epoxy resin ua ke nrog laminated tooj liab cladding. Qee qhov piv txwv tseem ceeb ntawm ntau txheej txheej (txog 12 txheej) PCBs yog computer graphics phaib, motherboards, microprocessor boards, FPGAs, CPLDs, hard drives, RF LNAs, satellite kev sib txuas lus kav hlau txais xov pub, hloov hom fais fab mov, hauv xov tooj, thiab lwm yam. Muaj ntau yam piv txwv uas yooj yim ib-txheej thiab ob-txheej PCBs yog siv, xws li CRT TVs, analog oscilloscopes, handheld calculators, computer nas, thiab FM xov tooj cua circuits.

Kev siv ntawm PCB:

1. Cov khoom siv kho mob:

Niaj hnub no kev nce qib hauv kev kho mob science yog tag nrho vim kev loj hlob sai ntawm kev lag luam hluav taws xob. Cov khoom siv kho mob feem ntau, xws li pH meter, lub plawv dhia sensor, ntsuas kub, ECG / EEG tshuab, MRI tshuab, X-ray, CT scan, ntshav siab tshuab, ntsuas ntshav qab zib cov cuab yeej, incubator, microbiological khoom thiab ntau lwm yam khoom. ib qho hluav taws xob PCB cais raws li. Cov PCBs no feem ntau yog tuab thiab muaj ib daim ntawv me me. Dense txhais tau hais tias cov khoom me me SMT tau muab tso rau hauv ib qho me me PCB. Cov cuab yeej siv kho mob no tau ua me me, nqa tau yooj yim, lub teeb hauv qhov hnyav, thiab yooj yim rau kev khiav lag luam.

2. Cov khoom siv hauv tsev.

PCBs kuj tau siv dav hauv kev tsim khoom, chaw tsim khoom, thiab looming factories. Cov kev lag luam no muaj cov tshuab hluav taws xob siab thiab cov khoom siv uas tau tsav los ntawm circuits uas ua haujlwm ntawm lub zog siab thiab xav tau cov dej ntws siab. Vim li no, txheej tooj liab tuab yog laminated ntawm PCB, uas txawv ntawm cov khoom siv hluav taws xob hauv PCBs, uas tuaj yeem kos cov dej ntws mus txog 100 amperes. Qhov no yog qhov tseem ceeb tshwj xeeb hauv kev siv xws li arc vuam, servo lub cev muaj zog loj, cov roj ntsha lead-acid chargers, kev lag luam tub rog, thiab cov khaub ncaws paj rwb vague tshuab.

3. teeb pom kev zoo.

Nyob rau hauv cov nqe lus ntawm teeb pom kev zoo, lub ntiaj teb no yog tsiv mus nyob rau hauv cov kev taw qhia ntawm lub zog-txuag kev daws teeb meem. Cov qij halogen no tsis tshua pom tam sim no, tab sis tam sim no peb pom cov teeb ci LED thiab cov teeb ci siab siv LED nyob ib puag ncig. Cov LEDs me me no muab lub teeb ci siab thiab yog mounted ntawm PCBs raws li txhuas substrates. Aluminium muaj cov cuab yeej ntawm absorbing cua sov thiab dissipating nws nyob rau hauv cov huab cua. Yog li ntawd, vim muaj lub zog siab, cov txhuas PCBs feem ntau yog siv hauv LED teeb circuits rau nruab nrab thiab siab zog LED circuits.

4. Automotive thiab aerospace kev lag luam.

Lwm daim ntawv thov ntawm PCB yog kev lag luam tsheb thiab aerospace. Qhov tshwm sim ntawm no yog qhov reverberation tsim los ntawm kev txav ntawm lub dav hlau lossis tsheb. Yog li ntawd, txhawm rau ua kom txaus siab rau cov kev vibrations siab, PCB yuav hloov tau. Yog li ntawd, ib hom PCB hu ua Flex PCB yog siv. Lub PCB hloov tau tuaj yeem tiv taus kev co siab thiab yog lub teeb hauv qhov hnyav, uas tuaj yeem txo qhov hnyav tag nrho ntawm lub dav hlau. Cov PCBs hloov tau yooj yim no kuj tuaj yeem hloov kho hauv qhov chaw nqaim, uas kuj yog qhov txiaj ntsig zoo. Cov PCBs hloov tau yooj yim no yog siv los ua cov khoom sib txuas, kev sib txuas, thiab tuaj yeem sib sau ua ke hauv qhov chaw sib cog lus, xws li tom qab lub vaj huam sib luag, hauv qab dashboard, thiab lwm yam. Ib qho kev sib xyaw ua ke ntawm nruj thiab yoog raws PCB kuj tseem siv tau.

PCB hom:

Printed Circuit Boards (PCB) muab faib ua 8 pawg. Lawv yog

Ib sab PCB:

Lub Cheebtsam ntawm ib leeg-sab PCB tsuas yog mounted rau ntawm ib sab, thiab lwm sab yog siv rau tooj liab nyob ntawm tej. Ib txheej nyias ntawm cov ntawv ci tooj liab yog siv rau ib sab ntawm RF-4 substrate, thiab tom qab ntawd siv lub npog ntsej muag los muab cov rwb thaiv tsev. Thaum kawg, kev tshuaj ntsuam luam ntawv yog siv los muab cov ntaub ntawv cim rau cov khoom xws li C1 thiab R1 ntawm PCB. Cov txheej txheem PCBs no yooj yim heev rau kev tsim thiab tsim khoom ntawm qhov loj, kev lag luam xav tau loj, thiab lawv kuj pheej yig heev los yuav. Feem ntau siv hauv cov khoom siv hauv tsev, xws li cov kua txiv hmab txiv ntoo / cov khoom sib tov, cov kiv cua them nyiaj, lub tshuab xam zauv, cov roj teeb me me, cov khoom ua si, TV chaw taws teeb tswj, thiab lwm yam.

Ob txheej txheej PCB:

Ob-sided PCB yog PCB nrog tooj liab txheej siv rau ntawm ob sab ntawm lub rooj tsavxwm. Laum qhov, thiab THT Cheebtsam nrog cov hlau lead yog ntsia rau hauv cov qhov no. Cov qhov no txuas ib sab mus rau lwm sab los ntawm cov kab tooj liab. Cov khoom siv lead ua dhau los ntawm lub qhov, cov hlau lead ntau dhau raug txiav los ntawm lub tshuab txiav, thiab cov hlau lead yog welded rau lub qhov. Tag nrho cov no yog ua manually. Kuj tseem muaj SMT cov khoom thiab THT cov khoom ntawm 2-txheej PCB. SMT Cheebtsam tsis xav tau qhov, tab sis cov ntaub qhwv yog tsim rau ntawm PCB, thiab SMT cov khoom raug kho ntawm PCB los ntawm kev rov ua dua. SMT Cheebtsam nyob hauv qhov chaw me me ntawm PCB, yog li ntau qhov chaw dawb tuaj yeem siv rau ntawm lub rooj tsavxwm Circuit Court kom ua tiav ntau lub zog. Ob-sided PCBs yog siv rau cov khoom siv fais fab, amplifiers, DC tsav tsav, ntsuas ntsuas, thiab lwm yam.

Multilayer PCB:

Multi-txheej PCB yog ua los ntawm ntau txheej 2-txheej PCB, sandwiched ntawm dielectric insulating txheej los xyuas kom meej tias lub rooj tsavxwm thiab cov khoom tsis puas los ntawm overheating. Multi-txheej PCB muaj ntau qhov ntev thiab ntau txheej, los ntawm 4-txheej PCB mus rau 12-txheej PCB. Cov khaubncaws sab nraud povtseg ntau dua, qhov nyuaj ntawm Circuit Court thiab qhov nyuaj ntawm PCB layout tsim.

Multi-txheej PCBs feem ntau muaj cov dav hlau hauv av ywj siab, lub dav hlau fais fab, lub dav hlau teeb liab ceev, kev xav txog kev ncaj ncees, thiab kev tswj xyuas thermal. Cov kev siv feem ntau yog cov tub rog xav tau, aerospace thiab aerospace electronics, satellite kev sib txuas lus, navigation electronics, GPS nrhiav, radar, digital signal processing thiab cov duab ua.

Rigid PCB:

Tag nrho cov PCB hom tau tham saum toj no yog nyob rau hauv pawg PCB nruj. Rigid PCBs muaj cov khoom substrates xws li FR-4, Rogers, phenolic resin thiab epoxy resin. Cov phiaj no yuav tsis khoov thiab ntswj, tab sis tuaj yeem tswj tau lawv cov duab rau ntau xyoo txog li 10 lossis 20 xyoo. Qhov no yog vim li cas ntau cov khoom siv hluav taws xob muaj lub neej ntev vim tias muaj kev sib tw, kev ruaj khov thiab kev sib tw ntawm cov PCBs nruj. PCBs ntawm cov khoos phis tawj thiab laptops yog nruj. Ntau lub TVs, LCD thiab LED TVs feem ntau siv hauv tsev yog ua los ntawm PCBs nruj. Tag nrho cov saum toj no ib leeg-sab, ob-sided thiab multilayer PCB daim ntawv thov kuj muaj feem xyuam rau cov PCBs nruj.

Flex PCB:

Flexible PCB los yog hloov pauv PCB tsis nruj, tab sis nws hloov tau thiab tuaj yeem khoov tau yooj yim. Lawv yog cov elastic, muaj cov cua kub tsis kam thiab cov khoom hluav taws xob zoo heev. Cov khoom siv substrate ntawm Flex PCB nyob ntawm kev ua haujlwm thiab tus nqi. Cov ntaub ntawv substrate rau Flex PCB yog polyamide (PI) zaj duab xis, polyester (PET) zaj duab xis, PEN thiab PTFE.

Tus nqi tsim khoom ntawm Flex PCB yog ntau dua li cov PCB nruj. Lawv tuaj yeem muab tais los yog qhwv ib ncig ntawm cov ces kaum. Piv nrog rau cov PCB nruj sib xws, lawv siv qhov chaw tsawg dua. Lawv yog cov hnyav tab sis muaj zog tsim kua muag tsawg heev.

Rigid-Flex PCB:

Kev sib xyaw ua ke ntawm cov PCBs nruj thiab hloov tau yooj yim yog qhov tseem ceeb heev hauv ntau qhov chaw thiab qhov hnyav-kev txwv. Piv txwv li, nyob rau hauv ib lub koob yees duab, lub Circuit Court yog ib qho nyuaj, tab sis kev sib xyaw ua ke ntawm nruj thiab yoog raws PCB yuav txo cov naj npawb ntawm cov khoom thiab txo cov PCB loj. Kev xaim ntawm ob lub PCB tuaj yeem ua ke ntawm ib qho PCB. Cov ntawv thov feem ntau yog cov koob yees duab digital, xov tooj ntawm tes, tsheb, laptops thiab cov khoom siv nrog cov khoom txav

Kev kub ceev PCB:

High-speed lossis high-frequency PCBs yog PCBs siv rau cov ntawv thov kev sib txuas lus nrog cov zaus siab dua 1 GHz. Hauv qhov no, teeb meem kev ncaj ncees tuaj rau hauv kev ua si. Cov khoom siv ntawm high-frequency PCB substrate yuav tsum tau ua tib zoo xaiv kom ua tau raws li cov qauv tsim.

Cov khoom siv feem ntau yog polyphenylene (PPO) thiab polytetrafluoroethylene. Nws muaj qhov ruaj khov dielectric tas li thiab me me dielectric poob. Lawv muaj qhov nqus dej tsawg tab sis tus nqi siab.

Ntau lwm cov khoom siv dielectric muaj qhov sib txawv dielectric tsis tu ncua, ua rau muaj kev hloov pauv impedance, uas tuaj yeem cuam tshuam kev sib haum xeeb thiab poob ntawm cov teeb liab digital thiab poob ntawm cov teeb liab kev ncaj ncees.

Aluminium PCB:

Aluminium-based PCBs substrate cov ntaub ntawv muaj cov yam ntxwv ntawm kev ua kom sov zoo. Vim tsis muaj thermal tsis kam, aluminium-raws li PCB txias yog zoo dua li nws cov tooj liab-raws li PCB. Nws radiates cua sov nyob rau hauv cov huab cua thiab nyob rau hauv lub thermal junction cheeb tsam ntawm lub PCB board.

Ntau lub teeb ci LED teeb ci, lub teeb ci siab LED yog ua los ntawm aluminium backing PCB.

Aluminium yog cov hlau nplua nuj thiab nws cov mining nqi qis, yog li tus nqi ntawm PCB kuj tseem qis heev. Aluminium yog recyclable thiab non-toxic, yog li nws yog ib puag ncig tus phooj ywg. Aluminium muaj zog thiab ruaj khov, yog li nws txo qhov kev puas tsuaj thaum tsim khoom, kev thauj mus los thiab kev sib dhos

Tag nrho cov yam ntxwv no ua rau txhuas-raws li PCBs muaj txiaj ntsig zoo rau cov ntawv thov tam sim no xws li cov tswj lub cev muaj zog, cov roj teeb hnyav hnyav, thiab lub teeb ci siab LED.

nyob rau hauv xaus:

Nyob rau hauv xyoo tas los no, PCBs tau hloov zuj zus los ntawm ib txheej txheej yooj yim mus rau ntau lub tshuab, xws li high-frequency Teflon PCBs.

PCB tam sim no npog yuav luag txhua qhov chaw ntawm kev siv thev naus laus zis niaj hnub thiab kev hloov pauv kev tshawb fawb. Microbiology, microelectronics, nanotechnology, aerospace kev lag luam, tub rog, avionics, neeg hlau, kev txawj ntse thiab lwm yam kev lag luam yog tag nrho raws li ntau hom ntawv luam tawm Circuit Board (PCB) lub tsev thaiv.