Silkscreen ntawm PCB yog dab tsi?
Thaum koj tsim lossis xaj koj luam tawm Circuit Boards , koj puas yuav tau them nyiaj ntxiv rau silkscreen?Muaj qee cov lus nug koj yuav tsum paub tias dab tsi yog silkscreen?Thiab tseem ceeb npaum li cas silkscreen nyob hauv koj Kev tsim kho ntawm PCB Board los yog Printed Circuit Board Assembly ?Tam sim no ABIS yuav piav qhia rau koj.
Silkscreen yog dab tsi?
Silkscreen yog txheej txheej ntawm tus cwj mem siv los txheeb xyuas cov khoom, cov ntsiab lus kuaj, qhov chaw ntawm PCB, cov cim ceeb toom, logos thiab cov cim thiab lwm yam.Txawm li cas los xij, kev siv silkscreen ntawm sab solder kuj tsis tshua muaj.Tab sis qhov no yuav ua rau tus nqi nce ntxiv.Qhov tseem ceeb ntawm cov ncauj lus kom ntxaws PCB silkscreen tuaj yeem pab ob tus neeg tsim khoom thiab tus kws tshaj lij txhawm rau nrhiav thiab txheeb xyuas tag nrho cov khoom.
Tus cwj mem yog tus cwj mem tsis yog epoxy.Tus cwj mem siv rau cov cim no yog tsim heev.Cov qauv xim peb ib txwm pom yog dub, dawb thiab daj.PCB software kuj siv tus qauv fonts hauv cov khaubncaws sab nraud povtseg tab sis koj tuaj yeem xaiv lwm cov ntawv sau los ntawm lub kaw lus ib yam nkaus.Rau kev tshuaj ntsuam kab mob ib txwm muaj koj xav tau cov tshuaj ntsuam polyester ncab ntawm aluminium thav duab, laser duab plotter, tus tsim tshuaj tsuag thiab kho qhov cub.
Dab tsi yuav cuam tshuam rau silkscreen?
Viscosity: Viscosity yog hais txog kev txav mus los ntawm cov txheej txheem dej uas nyob ib sab thaum cov dej ntws, ces kev sib txhuam yuav raug tsim los ntawm ob txheej dej;unit: Pascal vib nas this (pa.s).
Hardness: Lub hardness ntawm tus number case tom qab ua ntej ci yog 2B, hardness ntawm tus number case tom qab raug yog 2H, thiab hardness ntawm tus number case tom qab ci yog 6H.cwj mem hardness. Thixotropic: tus number case yog gelatinous thaum sawv ntsug, tab sis lub viscosity hloov thaum kov, tseem hu ua thixotropic, anti-sagging;nws yog lub cev khoom ntawm cov kua, uas yog, nyob rau hauv lub xeev ntawm nplawm Nws viscosity poob, thiab nws sai sai rov qab nws cov yam ntxwv viscosity qub tom qab tso cai sawv ntsug.Los ntawm nplawm, cov nyhuv ntawm thixotropy kav ntev, txaus los tsim kho nws cov qauv sab hauv.Yuav kom ua tiav cov txiaj ntsig zoo ntawm cov tshuaj ntsuam luam ntawv, thixotropy ntawm tus number case yog qhov tseem ceeb heev.Tshwj xeeb tshaj yog nyob rau hauv tus txheej txheem ntawm squeegee, tus number case yog agitated kom nws liquefied.Cov nyhuv no ua kom nrawm nrawm ntawm tus number case dhau los ntawm lub mesh, thiab txhawb kev sib txuas ntawm tus cwj mem sib cais los ntawm cov mesh.Thaum lub squeegee nres txav, tus number case rov qab mus rau lub xeev zoo li qub, thiab nws cov viscosity sai sai rov qab mus rau cov ntaub ntawv qub uas xav tau. Zaj duab xis qhuav: Qhuav zaj duab xis qauv:
Zaj duab xis qhuav muaj peb ntu thiab cov khoom xyaw:
Txhawb zaj duab xis (polyester zaj duab xis, Polyester)
Diam duab-tiv taus Dry Film
Npog zaj duab xis (polyethylene zaj duab xis, Polyethylene)
Cov khoom xyaw tseem ceeb
①Binder binder (film-forming resin),
② Duab-polymerization monomer Monomer,
③Photo-initiator,
④Plasticizer,
⑤ Adhesion Promoter,
⑥ Thermal polymerization inhibitor,
⑦ Pigment Dye,
⑧ kuab tshuaj
Cov yeeb yaj kiab qhuav tau muab faib ua peb pawg raws li kev txhim kho zaj duab xis qhuav thiab tshem tawm cov txheej txheem: hnyav-raws li zaj duab xis qhuav, dej-soluble zaj duab xis qhuav thiab tev-tawm zaj duab xis qhuav;Raws li lub hom phiaj ntawm cov yeeb yaj kiab qhuav, nws tau muab faib ua: tiv thaiv zaj duab xis qhuav, daim npog ntsej muag qhuav thiab Solder mask qhuav zaj duab xis.
rhiab heev ceev: hais txog tus nqi ntawm lub teeb lub zog yuav tsum tau rau lub photoresist rau polymerize lub photoresist los ua ib tug polymer nrog ib tug tej yam kuj los tiv thaiv nyob rau hauv lub irradiation ntawm ultraviolet lub teeb, nyob rau hauv cov xwm txheej ntawm tsau lub teeb qhov siv thiab teeb nrug, rhiab ceev yog qhia raws li qhov ntev ntawm lub sij hawm raug, lub sij hawm raug luv luv txhais tau tias ceev ceev ceev.
Kev daws teeb meem: yog hais txog cov kab (los yog qhov sib nrug) uas tuaj yeem tsim los ntawm cov yeeb yaj kiab qhuav tiv thaiv nyob rau hauv qhov deb ntawm 1 hli.Qhov kev daws teeb meem kuj tuaj yeem qhia los ntawm qhov loj ntawm cov kab (los yog qhov sib nrug).
Net yarn:
Net ceev:
T tus naj npawb: hais txog tus naj npawb ntawm meshes hauv 1 cm ntev.
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