Hauv kev tsim cov txheej txheem ntawm cov khoom siv hluav taws xob sai sai, qhov tseeb thiab qhov zoo ntawm cov txheej txheem tsim khoom ntawm cov khoom siv hluav taws xob, raws li cov khoom tseem ceeb, cuam tshuam ncaj qha rau kev ua haujlwm thiab kev ntseeg siab ntawm cov khoom siv hluav taws xob. CovCircuit board tin deposition txheej txheem, raws li tus tswv cuab tseem ceeb ntawm ntau cov txheej txheem kho saum npoo, tab tom tuav txoj haujlwm tseem ceeb hauv kev tsim hluav taws xob vim nws qhov tshwj xeeb zoo.
Tshawb nrhiav lub hauv paus ntsiab lus ntawm tin deposition txheej txheem
Circuit board tin deposition, tseem hu ua tshuaj tin deposition, yog qhov tseeb deposition ntawm ib txheej ntawm ntshiab tin nyob rau hauv tooj liab nto ntawm lub Circuit Court board los ntawm cov tshuaj tiv thaiv. Nws lub hauv paus ntsiab lus yog ua raws li cov tshuaj tiv thaiv redox. Peb paub tias tooj liab muaj zog hlau ua haujlwm ntau dua li cov tin, thiab nyob rau hauv ib txwm muaj, tooj liab yog ib qho nyuaj rau kev hloov cov tin los ntawm tin ntsev tov. Txawm li cas los xij, los ntawm kev ntxiv cov tooj liab ion chelating cov neeg ua haujlwm xws li thiourea rau cov kev daws teeb meem tshwj xeeb, qhov kev hloov pauv zoo tau tshwm sim. Thiourea cleverly combines nrog tsawg concentration monovalent tooj liab ions nyob rau hauv kev daws los tsim cov tebchaw ruaj khov, uas ua rau tsis zoo hloov nyob rau hauv lub electrochemical peev xwm ntawm tooj liab. Nyob rau hauv no txoj kev, tin yog ntau electropositive tshaj tooj liab nyob rau hauv lub cheeb tsam no, uas txhawb tin ions kom tau electrons los ntawm kev daws, raug txo, thiab tso rau ntawm tooj liab nto, ntse tsim ib tug uniform thiab tuab tin txheej. Cov txheej txheem no zoo li ua tib zoo choreographed microscopic 'tshuaj seev cev', qhov twg txhua ion nkag mus rau qhov kev hloov pauv hauv qhov kev txiav txim siab raws li cov cai tsim, thaum kawg tsim cov txheej txheem txheej txheej zoo tagnrho.
Cov txiaj ntsig tseem ceeb ntawm cov txheej txheem tin deposition
Zoo solderability lav: Circuit Court board kho nrog tin deposition tshuab ua tau zoo heev nyob rau hauv cov nqe lus ntawm solderability. Cov txheej txheej txheej txheej txheej txheej txheej ntawm nws qhov chaw zoo li lub tsev ruaj khov thiab du "choj" rau cov khoom siv hluav taws xob txuas ntxiv. Txawm hais tias siv cov txheej txheem kev siv cov txheej txheem los yog cov txheej txheem niaj hnub ua tau zoo dua xws li nthwv dej thiab rov ua dua, lub rooj tsav xwm hauv Circuit Court tom qab tin deposition tau yooj yim lis lawv, xyuas kom meej tias cov pob qij txha yog ruaj khov thiab txhim khu kev qha, zoo heev txo qhov tshwm sim ntawm qhov tsis xws luag xws li virtual soldering thiab desoldering. Txawm tias tom qab kev sim ua ib puag ncig zoo, xws li kev ua kom tsis tu ncua ntawm 155℃rau 4 xuab moos, lossis tiv thaiv kev ntsuas kub thiab av noo txog li 8 hnub (45 degree, txheeb ze av noo 93%), lossis tseem tab tom ua peb zaug ntawm reflow soldering, cov txheej tin tso tawm tseem tuaj yeem tuav nws txoj hauj lwm thiab tuav lub hauv paus ruaj khov {8} cov khoom siv hluav taws xob ntev.
Kev tiv thaiv kev ua tau zoo: Cov txheej tin tso rau hauv tsis tsuas yog muaj cov khoom zoo, tab sis kuj ua tau zoo ntawm kev tiv thaiv. Nws zoo li "cov cuab yeej" ruaj khov uas npog cov tooj liab zoo, tiv thaiv kev cuam tshuam ntawm oxygen, dej vapor, thiab lwm yam corrosive, yog li ncua cov txheej txheem oxidation thiab corrosion ntawm tooj liab thiab txuas ntxiv lub neej kev pab cuam ntawm lub rooj tsav xwm Circuit Court. Piv nrog rau cov txheej txheem electroplating tin, cov txheej txheem tin uas tso tawm yog smoother thiab smoother, thiab nws yog ib qho nyuaj rau tsim tooj liab tin intermetallic compounds thaum lub sij hawm tsim, thiab tsis muaj mob taub hau ntawm tin whisker teeb meem. Lub xub ntiag ntawm tin whiskers tuaj yeem ua rau muaj qhov ua txhaum loj xws li lub voj voog luv luv, thiab cov txheej txheem tin deposition tau ua tiav kom tsis txhob muaj kev phom sij zais, ntxiv kev txhim kho kev ntseeg siab thiab kev ruaj ntseg ntawm lub rooj tsavxwm.
Kev txhim kho hluav taws xob zoo: Hauv lub hnub nyoog hluav taws xob niaj hnub no ntawm siab - zaus thiab siab -ceev teeb liab kis tau tus mob, qhov kev ua tau zoo ntawm hluav taws xob ntawm Circuit Court boards tseem ceeb heev. Lub thickness ntawm cov tin txheej tsim los ntawm cov txheej txheem tin deposition feem ntau yuav raug tswj los ntawm 0.8-1.5 μ m, uas endows lub rooj tsav xwm Circuit Court nrog zoo hluav taws xob kev ua tau zoo. Nws tuaj yeem tiv taus ntau yam hlau lead- tsis pub muaj kev cuam tshuam kev sib tsoo, txo cov teeb liab poob thiab cuam tshuam thaum lub sij hawm siab - zaus teeb liab kis tau tus mob, thiab xyuas kom meej tias cov teeb liab yuav kis tau sai thiab raug rau ntawm Circuit Court boards, muab kev txhawb zog rau cov khoom siv hluav taws xob xws li 5G cov khoom siv sib txuas lus thiab cov khoos phis tawj ua tau zoo uas yuav tsum tau muaj cov teeb liab kis tau zoo heev.
Kev xyaum ntawm kev tiv thaiv ib puag ncig lub tswv yim: Nrog rau kev nthuav dav thoob ntiaj teb rau kev tiv thaiv ib puag ncig, kev lag luam hluav taws xob tsim hluav taws xob kuj tseem nrhiav txoj hauv kev ntsuab thiab kev txhim kho kom ruaj khov. Cov txheej txheem tin deposition precisely ua raws li cov qauv no, tso tseg cov hlau hnyav xws li cov hlau lead uas tsim kev puas tsuaj rau ib puag ncig hauv cov txheej txheem ib txwm muaj, thiab yog cov txheej txheem ntsuab thiab ib puag ncig zoo. Nyob rau tib lub sijhawm, cov kua khib nyiab tsim tawm thaum lub sijhawm txheej txheem tin deposition tuaj yeem rov ua dua dawb, ntxiv kom txo tau qhov kev puas tsuaj rau ib puag ncig thiab ua kom pom lub luag haujlwm ntawm kev lag luam hluav taws xob hauv kev tiv thaiv ib puag ncig.
Cov txheej txheem nthuav dav ntawm tin deposition technology
Kev npaj ua ntej: Kev ntxuav thiab ua kom lub rooj tsavxwm Circuit Court: Ua ntej tin deposition, lub rooj tsavxwm Circuit Court yuav tsum tau ua kom huv si thiab huv si. Ua ntej, siv lub tshuab degreaser tshwj xeeb kom tshem tawm cov roj stains, impurities, thiab cov oxides seem ntawm cov txheej txheem dhau los ntawm lub rooj tsav xwm hauv Circuit Court, kom ntseeg tau tias cov tooj liab nto yog huv si li tshiab. Tom qab ntawd, los ntawm cov txheej txheem micro etching, residual tooj liab oxide nyob rau ntawm tooj liab nto yog raug tshem tawm siv sodium persulfate los yog sulfuric acid hydrogen peroxide series micro etching daws, thiab ib tug ntxhib thiab uniform tooj liab nto yog tsim. Qhov chaw ntxhib no zoo li npaj "siab- zoo canvas" rau cov tshuaj tiv thaiv tin deposition tom ntej, uas tuaj yeem txhim kho qhov adhesion ntawm tin deposition txheej thiab tooj liab nto, nteg lub hauv paus ruaj khov rau kev vam meej ntawm cov tin deposition tom ntej.
Cov kauj ruam tseem ceeb ntawm tin deposition: Exquisite txhais ntawm kev hloov pauv cov tshuaj tiv thaiv: Lub pre-npaj Circuit Court board nkag mus rau hauv lub pre immersion tank, thiab cov tshuaj muaj pes tsawg leeg nyob rau hauv lub pre immersion tank zoo ib yam li lub ntsiab tin tank, tab sis muaj qhov sib txawv ntawm qhov kub thiab txias thiab lwm yam tsis. Thaum lub sij hawm ua ntej immersion txheej txheem, nyias tin txheej nrog ib tug tuab ntawm kwv yees li 0.1-0.15 μ m yuav sai sai tso rau ntawm tooj liab nto. Cov txheej txheej nyias nyias no zoo li "vanguard force", nws lub xub ntiag tuaj yeem tsis tsuas yog ua kom qis qis ntawm cov tshuaj tiv thaiv pib hauv lub ntsiab tin da dej, ua rau cov txheej txheem tom qab tso cov tin txheej zoo dua thiab zoo dua qub, tab sis kuj tiv thaiv cov khoom seem thiab oxides los ntawm kev nkag mus rau hauv lub ntsiab tin da dej tom qab micro corrosion, yog li txuas ntxiv lub neej kev pab cuam ntawm lub ntsiab tin da dej tov. Tom qab ntawd, lub rooj tsav xwm Circuit Court nkag mus rau hauv lub ntsiab tin da dej, uas muaj cov khoom tseem ceeb xws li methylsulfonic acid, tin methylsulfonate, thiab thiourea. Nyob rau hauv no ' magic tank ', cov kev hloov pauv hloov mus txuas ntxiv tshwm sim saum cov txheej txheej txheej txheej txheej ua ntej immersion, thiab cov tin ions raug txo qis los ntawm cov tshuaj thiab muab tso rau saum cov txheej nyias nyias kom txog rau thaum lub thickness ntawm cov tin txheej ua tau raws li cov neeg siv khoom xav tau. Nyob rau hauv cov txheej txheem no, yam xws li kab ceev, qhov kub thiab txias, thiab kev daws concentration ua lub luag haujlwm tseem ceeb hauv kev tswj cov thickness ntawm cov tin txheej, ib yam li cov pob qhov rooj ntawm qhov ntsuas qhov tseeb.
Tom qab ua tiav: Ua tib zoo saib xyuas kev tu thiab ziab: Tom qab ua tiav cov tinning ntawm lub rooj tsavxwm Circuit Court los ntawm lub ntsiab tin da dej, tej zaum yuav muaj ib co residual tinning tov rau saum npoo. Yog tias cov kev daws teeb meem no tsis raug tshem tawm hauv lub sijhawm, lawv yuav muaj kev cuam tshuam tsis zoo rau kev ua haujlwm ntawm lub rooj tsav xwm hauv Circuit Court. Yog li ntawd, yuav tsum muaj kev kho mob nruj heev. Ua ntej, dej kub los yog alkaline ntxuav yuav siv tau los ua ntej tshem tawm cov viscous tin plating tov rau ntawm lub rooj tsavxwm. Tom qab ntawd, cov dej deionized tuaj yeem siv rau ntau qhov kev ntxuav kom ntseeg tau tias qhov chaw ntawm lub rooj tsavxwm yog huv thiab tsis muaj qhov seem. Txhawm rau txhim kho qhov zoo ntawm lub rooj tsav xwm Circuit Court, kev kho tom qab immersion kuj tseem yuav ua. Cov kev daws teeb meem tshwj xeeb tom qab immersion, xws li cov tshuaj rad, yuav raug xaiv raws li qhov xav tau ntawm cov khoom sib txawv kom tshem tawm cov polarity organic pollutants ntawm lub tin nto thiab Circuit Court board nto, zoo txo cov pa phem ion; RPT cov tshuaj tshwj xeeb yog siv los tshem tawm cov uas tsis yog -cov pa phem organic nyob rau saum npoo ntawm cov tin, txo qhov muaj peev xwm ntawm cov xim ntawm cov tin tom qab reflow soldering. Tom qab ib tug series ntawm tu thiab tom qab soaking kev kho mob, lub Circuit Court board nkag mus rau hauv cov txheej txheem ziab. Los ntawm qhov tsim nyog ntsuas kub thiab lub sijhawm tswj, lub rooj tsav xwm hauv Circuit Court tau qhuav kom nkag mus rau cov txheej txheem tom ntej hauv nws lub xeev zoo.