Rau amateurPCB ntau lawm, thermal hloov luam ntawv thiab UV raug yog ob txoj kev siv ntau.
Cov khoom siv uas yuav tsum tau siv rau hauv txoj kev hloov thermal yog: tooj liab clad laminate, lub tshuab luam ntawv laser (yuav tsum yog lub tshuab luam ntawv laser, inkjet tshuab luam ntawv, dot matrix tshuab luam ntawv thiab lwm lub tshuab luam ntawv tsis raug tso cai), thermal hloov ntawv (tuaj yeem hloov tau los ntawm lub tshuab luam ntawv inkjet. rov qab daim ntawv tom qab daim ntawv nplaum), tab sis daim ntawv A4 zoo tib yam siv tsis tau), lub tshuab hloov hluav taws xob (tuaj yeem hloov tau los ntawm hluav taws xob hlau, daim duab laminator), roj-raws li tus cwj mem (yuav tsum yog roj-raws li tus cwj mem, nws tus number case yog waterproof, thiab cov cwj mem dej raws li dej tsis raug tso cai), corrosive chemicals (feem ntau siv ferric chloride los yog ammonium persulfate), lub rooj zaum xyaum, dej xuab zeb (qhov zoo dua qhov zoo dua).
Txoj kev ua haujlwm tshwj xeeb yog raws li hauv qab no:
Roughen tooj liab-clad nto ntawm lub rooj tsav tsheb tooj liab nrog dej xuab zeb, thiab zom tawm ntawm oxide txheej, thiab tom qab ntawd yaug cov hmoov tooj liab uas ua los ntawm kev sib tsoo nrog dej, thiab qhuav nws.
Siv lub tshuab luam ntawv laser los luam tawm daim iav sab laug thiab sab xis ntawm cov ntawv kos PCB mus rau sab du ntawm daim ntawv hloov thermal, thiab cov xaim yog xim dub thiab lwm qhov tsis muaj.
Tso cov ntawv thermal hloov rau ntawm tooj liab clad saum npoo ntawm lub phaj tooj liab clad board (lub tshuab luam ntawv sab nraud ntawm lub ntsej muag tooj liab, kom cov tooj liab clad board tag nrho npog qhov chaw luam ntawv), thiab kho cov thermal hloov daim ntawv los xyuas kom meej tias daim ntawv puas. tsis txav yuav tshwm sim.
Lub tshuab hloov thermal yog qhib thiab preheated.Tom qab lub preheating tiav lawm, ntxig rau tooj liab-clad laminate tsau nrog cov thermal hloov daim ntawv rau hauv cov roj hmab cov menyuam ntawm lub thermal hloov tshuab, thiab rov ua dua cov hloov lwm lub tsev rau 3 mus rau 10 lub sij hawm (nyob ntawm seb qhov kev ua tau zoo ntawm lub tshuab, ib co thermal hloov lwm lub tsev). cov tshuab tuaj yeem siv tom qab 1 kis, thiab qee qhov yuav tsum tau 10 kis).Yog tias koj siv lub tshuab hluav taws xob hloov pauv, thov kho cov hluav taws xob hlau kom kub siab tshaj plaws, thiab rov ua dua cov hlau nplaum tooj liab uas tau kho cov ntawv thermal hloov, thiab hlau nws sib npaug los xyuas kom meej tias txhua feem yuav raug nias los ntawm lub tshuab hluav taws xob. hlau.Ib qho tooj liab clad laminate yog kub heev thiab tsis tuaj yeem kov tau ntev ua ntej xaus.
Tos kom lub tooj liab clad laminate kom txias lawm, thiab thaum nws txias mus rau qhov chaw uas nws tsis kub, ua tib zoo tev tawm cov thermal hloov daim ntawv.Nco ntsoov tias koj yuav tsum tau tos kom txias kom tiav ua ntej yuav tawg, txwv tsis pub cov yas zaj duab xis ntawm cov ntawv thermal hloov tuaj yeem ua raws li cov tooj liab clad board, uas ua rau tsis ua haujlwm ntawm kev tsim khoom.
Xyuas seb qhov kev hloov pauv puas ua tiav.Yog tias qee cov kab mob tsis tiav, koj tuaj yeem siv cov roj-raws li cov cim los ua kom tiav.Nyob rau lub sijhawm no, cov qhab nia sab laug los ntawm cov roj-raws li tus cwj mem ntawm lub rooj tsav xwm tooj liab yuav nyob twj ywm tom qab corrosion.Yog tias koj xav ua tus sau tes kos npe rau ntawm lub rooj tsav xwm hauv Circuit Court, koj tuaj yeem sau ncaj qha rau ntawm lub rooj tsav xwm tooj liab nrog rau lub cim roj-raws li lub sijhawm no.Lub sijhawm no, lub qhov me me tuaj yeem raug xuas nrig ntawm ntug ntawm PCB thiab txoj hlua tuaj yeem khi kom yooj yim rau kev xeb hauv cov kauj ruam tom ntej.
Muab cov tshuaj corrosive uas tsim nyog (noj ferric chloride ua piv txwv) rau hauv lub thawv yas, thiab ncuav dej kub kom yaj cov tshuaj (tsis txhob ntxiv dej ntau dhau, nws tuaj yeem yaj tag, dej ntau dhau yuav txo qhov concentration) , thiab tom qab ntawd hloov mus rau Soak cov ntawv luam tawm tooj liab clad laminate nyob rau hauv cov tshuaj corrosive, nrog rau cov tooj liab clad sab, kom ntseeg tau tias cov tshuaj corrosive yog tag nrho submerged nyob rau hauv tooj liab clad laminate, thiab ces kom co lub thawv uas muaj cov tshuaj corrosive. , los yog co cov tooj liab clad laminate.Zoo, lub twj tso kua mis ntawm lub tshuab corrosion yuav do cov kua corrosion.Thaum lub sij hawm txheej txheem corrosion, thov nco ntsoov xyuam xim rau cov kev hloov ntawm tooj liab clad laminate.Yog tias cov pa roj carbon monoxide hloov pauv los yog tus cwj mem sau los ntawm tus cwj mem poob, thov nres qhov corrosion tam sim ntawd thiab tshem tawm cov tooj liab clad laminate thiab yaug nws, thiab tom qab ntawd sau cov kab poob nrog ib tus cwj mem oily dua.Recorrosion.Tom qab tag nrho cov tooj liab uas raug rau ntawm lub rooj tsav xwm tooj liab yog corroded, tshem tawm cov tooj liab clad board tam sim ntawd, ntxuav nws nrog dej kais dej, thiab tom qab ntawd siv cov ntawv xuab zeb los so tawm lub tshuab luam ntawv toner ntawm tooj liab clad board thaum tu.
Tom qab ziab, laum ib lub qhov nrog lub rooj zaum laum thiab nws npaj siv.
Txhawm rau ua PCB los ntawm UV raug, koj yuav tsum siv cov cuab yeej no:
Lub tshuab luam ntawv inkjet lossis lub tshuab luam ntawv laser (lwm hom tshuab luam ntawv tsis tuaj yeem siv), tooj liab clad laminate, photosensitive film lossis photosensitive roj (muaj nyob online), luam ntawv zaj duab xis lossis sulfuric acid ntawv (zaj duab xis pom zoo rau cov tshuab luam ntawv laser), iav phaj lossis plexiglass phaj ( Lub cheeb tsam yuav tsum loj dua li lub rooj tsav xwm hauv Circuit Court yuav tsum tau ua), lub teeb ultraviolet (koj tuaj yeem siv ultraviolet teeb lub raj rau tshuaj tua kab mob, lossis ultraviolet teeb siv hauv cov khw muag ntsia thawv), sodium hydroxide (tseem hu ua "caustic soda", uas tuaj yeem yuav hauv Cov khw muag khoom siv tshuaj), carbonic acid Sodium (tseem hu ua "soda tshauv", edible hmoov alkali yog crystallization ntawm sodium carbonate, uas tuaj yeem hloov tau los ntawm cov hmoov nplej alkali, lossis sodium carbonate siv hauv kev lag luam tshuaj), cov hnab looj tes tiv thaiv roj hmab (pom zoo) , oily marker cwj mem, tshuaj tiv thaiv corrosion, lub rooj zaum xyaum, Dej xuab zeb.
Ua ntej, siv lub tshuab luam ntawv los luam PCB daim duab rau ntawm daim duab los yog sulfuric acid ntawv los ua "cov yeeb yaj kiab tsis zoo".Nco ntsoov tias daim iav sab laug thiab sab xis yuav tsum tau luam tawm thaum luam ntawv, thiab cov xim dawb yog thim rov qab (uas yog, cov xov hluav taws xob tau luam tawm dawb, thiab qhov chaw uas cov ntawv ci tooj liab tsis tas yuav yog xim dub).
Roughen tooj liab-clad nto ntawm lub rooj tsav tsheb tooj liab nrog dej xuab zeb, thiab zom tawm ntawm oxide txheej, thiab tom qab ntawd yaug cov hmoov tooj liab uas ua los ntawm kev sib tsoo nrog dej, thiab qhuav nws.
Yog tias siv cov roj photosensitive, siv cov txhuam me me kom sib npaug ntawm cov roj photosensitive rau saum npoo ntawm tooj liab clad laminate thiab cia nws qhuav.Yog tias koj siv cov yeeb yaj kiab photosensitive, muab cov yeeb yaj kiab photosensitive rau ntawm qhov chaw ntawm tooj liab clad board nyob rau lub sijhawm no.Muaj cov yeeb yaj kiab tiv thaiv ntawm ob sab ntawm cov yeeb yaj kiab photosensitive.Ua ntej rub tawm cov yeeb yaj kiab tiv thaiv ntawm ib sab thiab tom qab ntawd muab lo rau ntawm lub rooj tsav xwm tooj liab.Tsis txhob tso cua npuas.Lwm txheej ntawm cov yeeb yaj kiab tiv thaiv Tsis txhob maj nrawm los rhuav tshem nws.Txawm hais tias nws yog cov yeeb yaj kiab photosensitive lossis cov roj photosensitive, thov ua haujlwm hauv chav tsaus.Yog tias tsis muaj chav tsaus, koj tuaj yeem kaw cov ntaub thaiv npog thiab qhib lub teeb pom kev tsis muaj zog kom ua haujlwm.Cov txheej txheem tooj liab clad laminate yuav tsum tau muab cia kom deb ntawm lub teeb.
Muab cov "tsis zoo zaj duab xis" rau ntawm tooj liab-clad laminate uas tau dhau los kho cov duab zoo nkauj, nias lub khob phaj, thiab dai lub teeb ultraviolet saum toj no kom ntseeg tau tias txhua txoj haujlwm tuaj yeem tau txais cov hluav taws xob tsis zoo ultraviolet.Tom qab tso nws, qhib lub teeb ultraviolet.Ultraviolet rays yog teeb meem rau tib neeg.Tsis txhob saib ncaj qha ntawm lub teeb tawm los ntawm lub teeb ultraviolet nrog koj ob lub qhov muag, thiab sim kom tsis txhob raug rau ntawm daim tawv nqaij.Nws raug nquahu kom siv lub thawv ntawv cardboard los ua lub thawv lub teeb kom raug.Yog tias koj raug nyob hauv chav, thov khiav tawm hauv chav tom qab qhib lub teeb.Qhov ntev ntawm cov txheej txheem raug cuam tshuam nrog ntau yam xws li lub zog ntawm lub teeb thiab cov khoom siv ntawm "tsis zoo zaj duab xis".Feem ntau, nws nyob ntawm 1 mus rau 20 feeb.Koj tuaj yeem tua lub teeb tsis tu ncua rau kev tshuaj xyuas.Yog tias muaj qhov sib txawv ntawm cov xim pom tseeb hauv cov yeeb yaj kiab photosensitive (qhov twg nws raug rau lub teeb ultraviolet) cov xim yuav tsaus dua, thiab cov xim hauv lwm qhov chaw tseem tsis hloov), ces qhov tshwm sim tuaj yeem raug tso tseg.Tom qab qhov raug tso tseg, nws tseem yuav tsum tau khaws cia hauv qhov tsaus ntuj kom txog thaum kev txhim kho tiav.
Npaj ib 2% concentration ntawm sodium carbonate tov, tsau cov tooj liab clad laminate nyob rau hauv cov tshuaj, tos ib pliag (kwv yees 1 feeb), thiab koj yuav pom tau hais tias cov photosensitive zaj duab xis ntawm lub teeb xim uas tsis tau raug pib. tig dawb thiab o.Tsis muaj qhov hloov pauv tseem ceeb hauv qhov chaw tsaus uas tshwm sim.Lub sijhawm no, koj tuaj yeem siv paj rwb swab maj mam so tawm qhov tsis raug.Kev tsim kho yog cov txheej txheem tseem ceeb heev, uas yog sib npaug rau cov txheej txheem thermal hloov ntawm kev ua PCB los ntawm kev hloov thermal.Yog hais tias qhov chaw tsis raug tshem tawm tsis tau ntxuav tag nrho (tsis yog tag nrho tsim), nws yuav ua rau corrosion nyob rau hauv cheeb tsam ntawd;thiab yog tias yog tias cov chaw raug raug ntxuav tawm, cov khoom siv PCB yuav ua tsis tiav.
Tom qab txoj kev loj hlob tiav lawm, koj tuaj yeem tawm hauv chav tsaus ntuj rau lub sijhawm no thiab ua raws li lub teeb pom kev zoo.Xyuas seb qhov thaiv ntawm qhov chaw raug puas lawm.Yog tias nws tsis ua tiav, nws tuaj yeem ua tiav nrog cov roj-raws li tus cwj mem, ib yam li cov txheej txheem hloov hluav taws xob.
Tom ntej no yog etching, cov kauj ruam no yog tib yam li etching hauv thermal hloov txoj kev, thov mus rau saum toj no.
Tom qab kev txhim kho corrosion tiav, demoulding yog nqa tawm.Npaj 2% sodium hydroxide tov, raus lub tooj liab clad laminate nyob rau hauv nws, tos ib pliag, cov photosensitive cov khoom seem ntawm tooj liab clad laminate yuav cia li poob.Ceeb Toom: Sodium hydroxide yog ib qho alkali muaj zog thiab corrosive heev.Thov ceev faj thaum tuav nws.Nws raug nquahu kom hnav hnab looj tes tiv thaiv thiab tsom iav.Thaum nws kov daim tawv nqaij, thov yaug nws nrog dej tam sim ntawd.Khoom sodium hydroxide yuav tsum muaj zog hygroscopic zog, thiab nws yuav deliquesce sai sai thaum raug huab cua, thov kom nws airtight.Sodium hydroxide tov tuaj yeem ua rau cov pa roj carbon dioxide hauv huab cua los ua sodium carbonate, uas yuav ua rau tsis ua haujlwm, thov npaj tam sim no.
Tom qab demoulding, ntxuav tawm cov seem sodium hydroxide ntawm PCB nrog dej, cia nws qhuav thiab tom qab ntawd punch qhov.
Post lub sij hawm: Mar-15-2023