Qee lub sijhawm nws tsim nyog los ua cov ntawv cog lus luv luv ntawm lub rooj tsav xwm. Xa lawv cov chaw tsim khoom hauv lub tuam txhab ntev thiab tsis kim, koj tuaj yeem ua rau lawv tus kheej. Yog li, txoj kev ua cov ntawv luam tawm Circuit Court ntawm tsev ib kauj ruam yog kauj ruam.
Cia peb xav txog cov txheej txheem ntawm cov ntawv luam tawm Circuit Circuit nyob hauv tsev siv cov piv txwv. Piv txwv li, koj yuav tsum ua ob daim txiag. Ib qho yog qhov hloov kho los ntawm ib hom rooj plaub mus rau lwm. Qhov thib ob yog hloov cov microcircuit loj loj nrog BGA pob nrog ob qhov me me, nrog TO-252 pob, nrog peb resistors. Qhov ntau thiab tsawg ntawm cov laug cam: 10x10 thiab 15x15 hli. Muaj 2 txoj kev xaiv los ua daim hlau luam tawm hluav taws xob nyob hauv tsev: siv tus kws yees duab thiab siv cov "laser hlau" txoj kev. Cia peb siv "laser hlau" txoj kev.
Cov txheej txheem ntawm kev tsim ua cov ntawv luam tawm Circuit Court hauv tsev
1. Npaj cov phiaj xwm luam tawm Circuit Court project. Kuv siv DipTrace: yooj yim, ceev, zoo. Tsim los ntawm peb cov neeg nyob sib xyaw. Cov neeg siv yooj yim heev thiab qab ntxiag interface, hauv kev sib piv rau feem ntau paub PCAD. Muaj kev hloov pauv rau PCAD PCB hom. Txawm hais tias ntau lub tuam txhab hauv tsev tau pib txais hauv DipTrace hom.
Hauv DipTrace, koj muaj sijhawm pom koj cov kev tsim koj yav tom ntej hauv ntim, uas yooj yim heev thiab pom tau. Nov yog qhov kuv yuav tsum tau txais (cov laug cam tau qhia ntawm cov nplai sib txawv):
2. Ua ntej, kos tawm lub textolite, txiav tawm ib kab seem rau cov ntawv luam tawm Circuit Court.
3. Peb nthuav qhia peb tes haujlwm ntawm lub tshuab luam ntawv laser ua daim iav tsom hauv qhov ua tau zoo tshaj plaws, tsis muaj kev yauv ntawm toner. Los ntawm kev sim ntev ntev, cov ntawv zoo tshaj plaws rau qhov no tau xaiv - daim duab tuab matte yees duab rau cov luam ntawv.
4. Tsis txhob hnov qab ntxuav thiab ua kom lub Board ploj. Yog tias tsis muaj degreaser, koj tuaj yeem mus hla cov tooj liab fiberglass nrog cov lwv. Tom ntej no, siv cov hlau zoo tib yam, peb "weld" lub toner los ntawm daim ntawv mus rau yav tom ntej luam tawm Circuit board board. Kuv tuav li 3-4 feeb hauv qab nias siab, kom txog thaum ntawv ntawv daj me ntsis. Kuv teeb cov cua sov mus rau qhov siab tshaj plaws. Kuv muab lwm daim ntawv sau ntxiv tso rau saum toj rau ib qho tseem tshaj cua sov, txwv tsis pub cov duab yuav "ntab". Ib qho tseem ceeb ntawm no yog qhov sib xws ntawm cua sov thiab siab.
5. Tom qab ntawd, cia lub rooj tsavxwm kom txias me ntsis, muab cov ntawv ua haujlwm nrog daim ntawv txuas rau nws hauv dej, nyiam dua kub. Daim ntawv thaij duab tau ntub sai sai, thiab tom qab ib feeb lossis ob zaug, koj tuaj yeem maj mam tshem tawm cov txheej saum toj kawg nkaus.
Hauv qhov chaw uas muaj qhov ntau zuj zus ntawm peb cov kev coj ua yav tom ntej, daim ntawv nplaum rau ntawm cov txiag tshwj xeeb. Peb tsis kov nws tseem.
6. Cia cov txwjlaug tuaj so li ob peb feeb. Ua tib zoo tshem tus so ntawm daim ntawv siv cov tshuaj txhuam los yog txhuam nrog koj tus ntiv tes.
7. Peb coj tawm lub chaw ua haujlwm. Peb qhuav nws. Yog tias qee qhov ntawm cov ciav hlau tsis pom tseeb, koj tuaj yeem ua rau lawv ci dua nrog lub cim CD nyias. Txawm hais tias nws zoo dua los xyuas kom meej tias txhua txoj kev tawm los kom sib npaug meej thiab kaj. Nws ua raws li 1) kev sib txawv thiab tsim nyog ntawm kev ua kom sov lub workpiece nrog hlau, 2) qhov tseeb thaum tshem daim ntawv, 3) qhov zoo ntawm PCB nto thiab 4) xaiv cov ntawv zoo. Koj tuaj yeem sim nrog taw tes kawg kom pom qhov ib uas ua haujlwm zoo tshaj rau koj.
8. Peb muab cov haujlwm tsim ua tiav nrog rau yav tom ntej-kev coj ua luam tawm ntawm nws hauv kev daws ntawm ferric chloride. Peb lom rau 1, 5 lossis 2. Thaum peb tseem tos, peb yuav npog peb "da dej" nrog lub hau: cov pa yog qhov zoo thiab muaj tshuaj lom.
9. Peb coj tawm lub tiav log los ntawm kev daws, yaug, kom qhuav. Lub toner los ntawm lub tshuab luam ntawv laser yog xav tsis thoob uas ntxuav ntawm lub rooj tsavxwm uas siv acetone. Raws li koj tuaj yeem pom, txawm tias qhov thinnest conductors nrog qhov dav ntawm 0.2 hli tuaj tawm zoo heev. Muaj yog heev me ntsis sab laug.
10. Ludim luam tawm cov laug cam Circuit Court ua los ntawm "laser hlau" txoj kev. Peb ntxuav cov flux residues nrog roj av lossis dej cawv.
11. Nws tseem tshua tsuas yog txiav tawm peb cov laug cam thiab mount lub xov tooj cua!
Cov lus xaus
Muaj ib qho txuj ci, cov "laser hlau" txoj kev yog tsim rau kev ua kom yooj yim luam tawm cov laug cam hauv tsev. Nws yog qhov tseeb tias luv luv los ntawm 0.2 hli thiab dav dua tau txais. Thicker conductors ua haujlwm tau zoo xwb. Lub sijhawm npaj, kev sim nrog kev xaiv ntawm hom ntawv thiab qhov kub ntawm cov hlau, etching thiab tinning yuav siv sijhawm li 3-5 teev. Tab sis qhov no tau nrawm dua li txhawm rau cov laug cam ntawm lub tuam txhab. Cov nqi nyiaj los kuj tseem tsawg. Feem ntau, txoj kev raug pom zoo rau cov haujlwm sib txawv hauv xov tooj cua cov haujlwm yooj yim.
