Etching lub rooj tsavxwm nrog hydrogen peroxide thiab citric acid yog ib daim ntawv qhia tshwj xeeb tshaj yog nrov nrog cov kws tshaj lij xov tooj cua. Qhov no tsis yog tsuas yog ceev ceev xwb, tab sis kuj yog txoj hauv kev nyab xeeb kom tau txais daim ntaub npaj rau cov khoom siv yav tom ntej.
Yuav ua li cas boards raug tshuaj lom yav dhau los?
Nws tau siv zog ntau los ua PCB. Ua ntej, lub tswv yim tau kos rau ntawm daim ntawv, tom qab ntawd lub qhov tau ua nyob rau hauv lub workpiece, tom qab ntawd cov lem raug xa mus rau ntawv ci textolite los yog getinax, siv cov khoom pleev xim. Tom qab cov txheej tau qhuav lawm, nws tau rhais tawm, thiab lub rooj tsavxwm tau muab tso rau hauv lub thawv nrog ib lub tiaj nyom rau etching.
Qhov nyuaj tshaj plaws yog tshuaj lom tus nqi. Txij li thaum rau cov hom phiaj no, cov nyom raws li ferric chloride tau siv. Nyob rau hauv lub xov tooj cua lub voj voog, xws li ib lub cuab tam tsis nyob rau hauv luv luv, tab sis nyob rau hauv tsev lawv yuav tsum tau nrhiav lwm txoj kev, uas feem ntau yog tooj liab sulfate.
Kev ua haujlwm ntawm lub rooj tsavxwm nqa lwm qhov zais cia: lub rooj tsavxwm tau etched unevenly. Ib txhiacov lem tau corroded, thiab nyob rau hauv tej qhov chaw qhov nto tsis etched. Txhua yam yog vim tsis muaj kev paub dhau los ntawm cov kws tsim khoom lossis kev siv cov kua dej rov qab.
Cov txheej txheem txheej txheem txheej txheem niaj hnub
Etching boards nrog hydrogen peroxide thiab citric acid tsis yog tshiab. Ntau tus tau hnov txog txoj kev no ua ntej. Los ntawm kev xaiv qhov kev xaiv ntawm pawg thawj coj saib no, koj yuav pom ntau qhov zoo dua ferric chloride etching. Piv txwv li, kev ua haujlwm zoo, kev nyab xeeb thiab ib puag ncig tus phooj ywg ntawm peroxide ua ke nrog tus neeg sawv cev oxidizing.
Daim ntawv ua zaub mov hauv tsev
Txhua yam koj yuav tsum tau etch lub rooj tsavxwm nrog hydrogen peroxide thiab citric acid, koj yuav pom hauv koj cov khoom pab thawj zaug thiab hauv chav ua noj, lossis koj tuaj yeem yuav yooj yim. Lwm qhov txiaj ntsig tsis zoo ntawm kev ua cov boards hauv txoj kev no yog tus nqi ntawm cov khoom xyaw los tsim cov kev daws teeb meem. Nov yog lwm qhov kom zoo dua ntawm hydrogen sib tov - nws yuav raug nqi tsawg dua ferric chloride.
Cov ntsiab lus
- Hydrogen peroxide 3% - 100 ml.
- YCitric acid - 30 grams.
- rooj ntsev - 5 grams (raws li ib qho kev pab cuam ntawm cov tshuaj tiv thaiv).
- Dej (yog xav tau).
Qhov tseem ceeb! Ib qho kev daws teeb meem hauv qhov kev faib ua feem yog txaus rau etch tooj liab ntawv ci nrog lub thickness ntawm 35 microns thiab thaj tsam ntawm 100 square meters. saib
Npaj lub rooj tsavxwm
- kos thiab luam tawm lub rooj tsavxwm.
- Txiav tawm ib daim ntawm textolite rau qhov loj me.
- Hloov lub toner mus rau textolite thiabtawm mus so, ces tshem tawm.
Yuav ua li cas npaj cov tshuaj?
- Kub cov hydrogen peroxide: tso lub raj mis rau hauv da dej thiab tos kom txog thaum qhov kub ntawm ob yam khoom sib npaug.
- Cia ib khob. Txhua yam, tab sis tsis yog hlau, yuav ua.
- Ncuav cov rhuab peroxide rau hauv lub tais huv, qhuav thiab ncuav rau hauv citric acid.
- Kua sib tov kom huv.
- do thaum ntxiv ntsev, uas ua raws li cov tshuaj hauv cov tshuaj.
Yuav ua li cas rau txim rau lub rooj tsavxwm?
Txhawm rau ua kom lub etching ntawm lub rooj tsavxwm nrog hydrogen peroxide thiab citric acid sai dua, koj tuaj yeem siv ob lub thawv. Tsuas yog tso lub tais me me ntawm cov nyom rau hauv lub thawv loj thiab ncuav dej kub rau hauv nws. Qhov no yuav ua kom ceev thiab ntxiv dag zog rau cov txheej txheem.
Etching lub rooj tsavxwm hauv cov tshuaj hydrogen peroxide yog ua raws li hauv qab no: lub rooj tsavxwm tau muab tso rau hauv cov nyom nrog rau sab ntawm txoj kev tau kos, kom cov khoom lwj tau yooj yim nkag mus rau hauv qab ntawm lub thawv. Txhawm rau kom cov tshuaj tiv thaiv mus ntxiv kom sib npaug, cov tshuaj yuav tsum tau nplawm me ntsis los ntawm qee lub sijhawm. Tag nrho cov txheej txheem yuav siv sijhawm tsis pub dhau 10 feeb.
Tom qab cov nroj tsuag tiav lawm, lub rooj tsavxwm yuav tsum tau nruab nrab thiab yaug hauv dej ntws.
Txoj kev ua pawg thawj coj no muaj kev nyab xeeb kiag li. Tam sim no nws muaj peev xwm ua cov laug cam hauv chaw ua haujlwm, hauv tsev, thiab hauv chaw ua haujlwm, thiab nws tsis yog qhov tsim nyog los ua haujlwm nrog cov tshuaj tsis zoo.
Qhov tseem ceeb! Yog hais tias cov tshuaj foams ntau, ces koj ncuav ntsev ntau dhau. Ncuav ntau peroxide, txwv tsis pub cov tshuaj tiv thaivyuav nquag heev, cov lem yuav puas.
Yog tias koj rub lub rooj tsavxwm tawm thiab saib nws thaum lub sijhawm cov tshuaj tiv thaiv, koj yuav tsis tuaj yeem pom qhov txawv piv rau li cas PCB yog etched hauv ferric chloride, tsuas yog tsis muaj. Qhov sib txawv tseem ceeb yog cov tshuaj tiv thaiv dhau mus sai thiab cov txheej txheem tsis txaus ntshai rau tib neeg.
Yuav ua li cas to taub tias lub rooj tsavxwm twb tau etched?
Hauv qhov nruab nrab hydrogen-acid, cov tshuaj tiv thaiv ua haujlwm raws li cov qauv: Cu + H3Cit + H2O2 → H[CuCit] + 2H2O. Etching ntawm lub rooj tsavxwm luam tawm hauv hydrogen peroxide tuaj yeem txiav txim siab ua tiav yog tias muaj kev cuam tshuam tau nres hauv cov tshuaj: nws tsis muaj suab nrov lossis npuas.
Cov khoom tiav yog ntxuav thiab ntxuav nrog dej. Toner lossis xim tuaj yeem raug tshem tawm nrog acetone. Tom qab ntawd, lub rooj tsavxwm tau so kom huv si thiab degreased.
Qhov tseem ceeb! Xyuas cov lem kom ncaj ncees tom qab ua tiav lub rooj tsavxwm. Lub Circuit Court puas yuav tsis ua haujlwm.
Raws li koj tuaj yeem pom, etching lub rooj tsavxwm nrog hydrogen peroxide hauv tsev tsis yog ua tau xwb, tab sis kuj muaj kev nyab xeeb. Nws yuav tsis yooj yim los nrhiav cov khoom tsim nyog rau kev npaj cov etching muaj pes tsawg leeg, thiab cov txheej txheem nws tus kheej yuav siv sijhawm tsis pub dhau 15 feeb. Niaj hnub no, txhua tus kws tshaj lij xov tooj cua, ua tsaug rau cov lus qhia yooj yim thiab raug, yuav tuaj yeem sim hauv tsev yam tsis muaj kev phom sij rau nws tus kheej lossis lwm tus.
