Ntawv luam tawm hauv Circuit Court board yog tus muab kev sib txuas hluav taws xob rau cov khoom siv hluav taws xob. Nws txoj kev loj hlob muaj keeb kwm ntawm ntau tshaj 100 xyoo; nws cov qauv tsim feem ntau yog layout tsim; Lub ntsiab kom zoo dua ntawm kev siv lub rooj tsavxwm Circuit Court yog kom txo tau cov xaim thiab kev sib dhos yuam kev, thiab txhim kho qib ntawm automation thiab kev ua haujlwm ntau lawm. Raws li tus naj npawb ntawm Circuit Court boards, nws tuaj yeem muab faib ua ib leeg-ib sab boards, ob-sided boards, plaub-txheej boards, rau-txheej boards thiab lwm yam multilayer circuit boards.

Txij li thaum lub rooj tsavxwm luam tawm tsis yog cov khoom siv dav dav dav dav, lub ntsiab lus ntawm lub npe yog me ntsis ruam. Piv txwv li, lub motherboard rau tus kheej lub computer yog hu ua lub ntsiab board, thiab tsis tuaj yeem hu ncaj qha rau lub rooj tsav xwm Circuit Court. Txawm hais tias muaj cov kab hluav taws xob hauv lub motherboard, Lawv tsis zoo ib yam, yog li thaum ntsuas kev lag luam, ob qho tib si muaj feem xyuam nrog tab sis tsis tuaj yeem hais tias yog tib yam. Lwm qhov piv txwv: vim tias muaj cov khoom sib xyaw ua ke rau ntawm lub rooj tsav xwm Circuit Court, cov xov xwm tshaj tawm hu nws lub rooj tsavxwm IC, tab sis qhov tseeb nws tsis zoo ib yam li lub rooj tsav xwm luam tawm. Peb feem ntau hais tias lub rooj tsavxwm luam tawm yog hais txog lub rooj tsavxwm liab qab – uas yog, lub rooj tsavxwm tsis muaj cov khoom siv sab saud. Nyob rau hauv tus txheej txheem ntawm PCB board tsim thiab Circuit Court board ntau lawm, engineers tsis tsuas yog yuav tsum tau tiv thaiv kev huam yuaj nyob rau hauv lub PCB board manufacturing txheej txheem, tab sis kuj yuav tsum tau kom tsis txhob tsim yuam kev.

Teeb meem 1: Circuit Court board luv Circuit Court: Rau hom teeb meem no, nws yog ib tug ntawm cov feem ntau faults uas yuav ncaj qha ua rau lub Circuit Court board tsis ua hauj lwm. Qhov loj tshaj yog vim li cas rau PCB board luv Circuit Court yog tsis tsim nyog solder pad tsim. Nyob rau lub sijhawm no, koj tuaj yeem hloov lub voj voog puag ncig mus rau oval. Zoo li, nce qhov kev ncua deb ntawm cov ntsiab lus los tiv thaiv luv luv Circuit Court. Kev tsim tsis tsim nyog ntawm cov kev taw qhia ntawm PCB pov thawj qhov chaw tseem yuav ua rau lub rooj tsavxwm luv luv thiab tsis ua haujlwm. Piv txwv li, yog tias tus pin ntawm SOIC yog sib npaug rau cov tin nthwv dej, nws yooj yim ua rau muaj kev sib tsoo luv luv. Lub sijhawm no, qhov kev taw qhia ntawm ib feem tuaj yeem hloov kho kom tsim nyog ua kom nws nyob rau sab xis ntawm tin yoj. Muaj lwm txoj hauv kev uas yuav ua rau luv luv Circuit Court tsis ua haujlwm ntawm PCB, uas yog, tsis siv neeg plug-in bent ko taw. Raws li IPC tau teev tseg tias qhov ntev ntawm tus pin yog tsawg dua 2 hli thiab muaj kev txhawj xeeb tias cov khoom yuav poob thaum lub kaum sab xis ntawm cov ceg khoov loj dhau, nws yooj yim ua rau luv luv, thiab qhov sib koom ua ke yuav tsum muaj ntau dua. tshaj 2 hli ntawm lub voj voog.

Teeb meem 2: PCB solder pob qij txha ua golden daj: Feem ntau, cov solder ntawm PCB Circuit Court boards yog silver-grey, tab sis qee zaus muaj cov pob qij txha golden. Qhov laj thawj tseem ceeb ntawm qhov teeb meem no yog qhov kub thiab txias heev. Nyob rau lub sijhawm no, koj tsuas yog yuav tsum tau txo qhov kub ntawm lub cub tawg.

Teeb meem 3: Cov xim tsaus nti thiab cov kab sib txuas tshwm sim ntawm lub rooj tsav xwm Circuit Court: Cov xim tsaus nti lossis cov xim me me tshwm sim ntawm PCB. Feem ntau ntawm cov teeb meem yog tshwm sim los ntawm kev sib kis ntawm cov solder thiab ntau oxides sib xyaw hauv cov molten tin, uas tsim cov qauv sib koom ua ke. nkig. Ceev faj tsis txhob ua rau nws tsis meej pem nrog cov xim tsaus uas tshwm sim los ntawm kev siv cov khoom siv nrog cov ntsiab lus tin tsawg. Lwm qhov laj thawj rau qhov teeb meem no yog qhov muaj pes tsawg leeg ntawm cov khoom siv hauv kev tsim khoom tau hloov pauv, thiab cov ntsiab lus impurity siab dhau lawm. Nws yog ib qho tsim nyog yuav tau ntxiv cov tin ntshiab los yog hloov lub solder. Cov iav stained ua rau lub cev hloov pauv hauv cov fiber ntau tsim, xws li kev sib cais ntawm cov khaubncaws sab nraud povtseg. Tab sis qhov teeb meem no tsis yog vim tsis zoo solder pob qij txha. Yog vim li cas yog vim li cas lub substrate yog rhuab heev, yog li nws yog tsim nyog los txo lub preheating thiab soldering kub los yog ua rau kom ceev ntawm substrate.

Teeb meem 4: Loos los yog misplaced PCB Cheebtsam: Thaum lub sij hawm reflow soldering txheej txheem, me me tej zaum yuav ntab rau molten solder thiab nws thiaj li tawm ntawm lub hom phiaj solder sib koom. Cov laj thawj muaj peev xwm rau kev hloov pauv lossis qaij suav nrog kev vibration lossis thaws ntawm cov khoom ntawm lub rooj tsavxwm PCB vim tsis muaj kev txhawb nqa Circuit Court board, reflow qhov cub, teeb meem solder paste, thiab tib neeg yuam kev.

Teeb meem 5: Circuit Court board qhib Circuit Court: Thaum cov kab tawg lawm, los yog lub solder tsuas yog nyob rau hauv lub ncoo thiab tsis nyob rau hauv cov khoom siv lead ua, ib tug qhib Circuit Court yuav tshwm sim. Hauv qhov no, tsis muaj adhesion lossis kev sib txuas ntawm cov khoom siv thiab PCB. Ib yam li luv luv circuits, cov no kuj tuaj yeem tshwm sim thaum lub sijhawm tsim khoom lossis thaum lub sijhawm vuam thiab lwm yam haujlwm. Kev vibration los yog ncab ntawm lub rooj tsavxwm Circuit Court, xa me nyuam rov los yog lwm yam khoom siv kho tshuab deformation yuav rhuav tshem cov kab los yog cov pob qij txha. Ib yam li ntawd, tshuaj lom neeg lossis cov dej noo tuaj yeem ua rau cov khoom siv hlau los yog hlau hnav, uas tuaj yeem ua rau cov khoom tawg.

Teeb meem 6: Vuam teeb meem: Cov hauv qab no yog qee qhov teeb meem tshwm sim los ntawm kev siv vuam tsis zoo: Kev puas tsuaj rau cov pob qij txha: Vim muaj kev cuam tshuam rau sab nraud, lub vuam txav ua ntej ua kom khov. Qhov no zoo ib yam li cov pob qij txha txias, tab sis vim li cas thiaj txawv. Nws tuaj yeem raug kho los ntawm kev rov ua kom sov, thiab cov pob qij txha tsis raug cuam tshuam los ntawm sab nraud thaum lawv txias. Cold welding: Qhov xwm txheej no tshwm sim thaum lub solder tsis tuaj yeem yaj kom zoo, ua rau cov tawv nqaij tsis zoo thiab tsis muaj kev sib txuas. Txij li cov solder ntau dhau tiv thaiv kom tiav melting, txias solder pob qij txha kuj tuaj yeem tshwm sim. Txoj kev kho yog kom rov ua kom qhov sib koom ua ke thiab tshem tawm cov solder ntau dhau. Solder choj: Qhov no tshwm sim thaum solder crosses thiab lub cev txuas ob ua ke. Cov no tuaj yeem tsim kev sib txuas tsis tau xav txog thiab luv luv Circuit Court, uas yuav ua rau cov khoom siv hluav taws xob kub hnyiab los yog kub hnyiab tawm cov kab thaum tam sim no siab dhau. Kev ntub dej tsis txaus ntawm cov ntaub qhwv, pins, lossis cov hlau lead. Ntau dhau los yog me ntsis solder. Pads uas tau nce vim overheating los yog ntxhib soldering.

Teeb meem 7: Qhov kev phem ntawm lub rooj tsavxwm pcb kuj tseem cuam tshuam los ntawm ib puag ncig: vim yog cov qauv ntawm PCB nws tus kheej, thaum nyob hauv ib puag ncig tsis zoo, nws yooj yim ua rau kev puas tsuaj rau lub rooj tsav xwm Circuit Court. Kev kub ntxhov lossis kub hloov pauv, cov av noo ntau dhau, kev vibration siab thiab lwm yam kev mob yog txhua yam uas ua rau lub rooj tsavxwm kev ua tau zoo txo ​​qis lossis txawm tias khawb. Piv txwv li, kev hloov ntawm qhov kub thiab txias yuav ua rau deformation ntawm lub rooj tsavxwm. Yog li ntawd, cov pob qij txha yuav raug rhuav tshem, lub rooj tsavxwm zoo yuav khoov, lossis cov kab tooj liab ntawm lub rooj tsavxwm yuav tawg. Ntawm qhov tod tes, cov dej noo hauv huab cua tuaj yeem ua rau oxidation, corrosion thiab xeb ntawm cov hlau nto, xws li cov khoom siv tooj liab, cov pob qij txha, cov ntaub qhwv, thiab cov khoom siv lead ua. Kev sib sau ntawm cov av, plua plav lossis cov khib nyiab ntawm qhov chaw ntawm cov khoom siv thiab cov khoom siv hluav taws xob tuaj yeem txo cov cua ntws thiab cua txias ntawm cov khoom, ua rau PCB overheating thiab kev ua haujlwm tsis zoo. Kev vibration, ntog, tsoo lossis khoov lub PCB yuav deform nws thiab ua rau cov tawg tshwm sim, thaum lub siab tam sim no los yog overvoltage yuav ua rau PCB tawg los yog ua rau kev laus sai ntawm cov khoom thiab txoj hauv kev.

Nqe Lus Nug 8: Tib neeg yuam kev: Feem ntau ntawm qhov tsis xws luag hauv PCB raug tsim los ntawm tib neeg yuam kev. Feem ntau, cov txheej txheem tsim khoom tsis raug, kev tso tawm tsis raug ntawm cov khoom thiab cov kev tsim khoom tsis raug cai tuaj yeem ua rau 64% kom tsis txhob muaj cov khoom tsis zoo tshwm sim.