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Mokhoa oa ho tseba PC lera?

  • 2022-05-25 12:00:11
Boto ea potoloho ea feme ea PCB e etsoa joang?Lintho tse nyenyane tsa potoloho tse ka bonoang holim'a metsi ke foil ea koporo.Qalong, foil ea koporo e ne e koahetsoe ke PCB eohle, empa karolo ea eona e ile ea behoa nakong ea ts'ebetso ea tlhahiso, 'me karolo e setseng e ile ea fetoha potoloho e nyenyane e kang mesh..

 

Lithapo tsena li bitsoa lithapo kapa mesaletsa 'me li sebelisetsoa ho fana ka likhokahano tsa motlakase ho likarolo tsa PCB.Hangata 'mala oa Boto ea PCB e tala kapa e sootho, e leng 'mala oa mask a solder.Ke lera le sireletsang le sireletsang le sireletsang terata ea koporo hape le thibela likarolo tse ling hore li se ke tsa rekisoa libakeng tse fosahetseng.



Multilayer Circuit boards li se li sebelisoa libotong tsa bo-mme le likarete tsa litšoantšo, e leng ho eketsang haholo sebaka se ka khoasoang.Mapolanka a mangata a sebelisa ho feta mapolanka a nang le mahlakore a le mong kapa a mahlakore a mabedi , 'me u behe lesela le sireletsang pakeng tsa boto ka 'ngoe ebe u li hatella hammoho.Palo ea likarolo tsa boto ea PCB e bolela hore ho na le lihlopha tse 'maloa tse ikemetseng tsa lithapo, hangata palo ea lihlopha e lekana,' me e kenyelletsa likarolo tse peli tse ka ntle.Liboto tse tloaelehileng tsa PCB hangata li na le likarolo tse 4 ho isa ho tse 8 tsa sebopeho.Palo ea likarolo tsa mapolanka a mangata a PCB a ka bonoa ka ho shebella karolo ea boto ea PCB.Empa bonneteng, ha ho motho ea nang le leihlo le letle joalo.Kahoo, mona ke mokhoa o mong oa ho u ruta.

 

Khokahano ea potoloho ea mapolanka a marang-rang a mangata e etsoa ka ho patoa le ho foufala ka theknoloji.Bongata ba liboto tsa bo-mme le likarete tse bonts'itsoeng li sebelisa liboto tsa PCB tsa 4-layer, 'me tse ling li sebelisa liboto tsa 6-, 8-layer, kapa esita le 10-layer PCB.Haeba u batla ho bona hore na ho na le likarolo tse kae ho PCB, u ka e tseba ka ho shebella masoba a tataiso, hobane liboto tse 4 tse sebelisoang letlapeng le ka sehloohong le karete ea pontšo ke likarolo tsa pele le tsa bone tsa wiring, 'me masela a mang a sebelisetsoa merero e meng (terata e fatše).le matla).

 

Ka hona, joalo ka boto ea lera habeli, lesoba la tataiso le tla kenella ka boto ea PCB.Haeba ba bang vias hlaha ka lehlakoreng le ka pele la PCB empa a ke ke a fumanoa ka lehlakoreng le ka morao, ka nako eo e lokela ho ba 6/8-lera boto.Haeba likoti tse tšoanang tsa tataiso li ka fumanoa mahlakoreng ka bobeli a boto ea PCB, ka tlhaho ke boto ea 4-layer.



Ts'ebetso ea ho etsa PCB e qala ka "substrate" ea PCB e entsoeng ka Glass Epoxy kapa e tšoanang.Mohato oa pele oa tlhahiso ke ho hula wiring pakeng tsa likarolo.Mokhoa ona ke ho "hatisa" potoloho e fosahetseng ea boto ea potoloho ea PCB e entsoeng ka mokhanni oa tšepe ka mokhoa oa Subtractive transfer.



Leqheka ke ho jala lesela le tšesaane la foil ea koporo holim'a sebaka sohle ebe o tlosa ho feteletseng.Haeba tlhahiso e na le mahlakore a mabeli, joale mahlakore ka bobeli a substrate ea PCB a tla koaheloa ka foil ea koporo.Ho etsa boto ea li-multi-layer, mapolanka a mabeli a mahlakoreng a mabeli a ka "hatelloa" hammoho le sekhomaretsi se khethehileng.

 

Ka mor'a moo, ho cheka le electroplating e hlokahalang ho hokahanya likarolo li ka etsoa ka boto ea PCB.Ka mor'a ho cheka ka lisebelisoa tsa mochine ho latela litlhoko tsa ho phunya, bokahare ba lerako la sekoti le tlameha ho kenngoa (theknoloji ea Plated-Through-Hole, PTH).Ka mor'a hore phekolo ea tšepe e etsoe ka har'a lerako la sekoti, likarolo tse ka hare tsa lipotoloho li ka kopanngoa.

 

Pele o qala electroplating, litšila tse ka mokoting li tlameha ho hloekisoa.Sena ke hobane resin epoxy e tla ba le liphetoho tse ling tsa lik'hemik'hale ha e futhumala, 'me e tla koahela likarolo tse ka hare tsa PCB, kahoo e hloka ho tlosoa pele.Ka bobeli liketso tsa ho hloekisa le ho pata li etsoa ts'ebetsong ea lik'hemik'hale.Ka mor'a moo, hoa hlokahala ho roala pente e hanyetsanang le solder (solder resist inki) holim'a mohala o ka ntle ka ho fetisisa e le hore mohala o se ke oa ama karolo e pentiloeng.

 

Ka mor'a moo, likarolo tse fapaneng li hatisoa skrineng ho boto ea potoloho ho bontša boemo ba karolo ka 'ngoe.Ha e khone ho koahela mohala leha e le ofe kapa menoana ea khauta, ho seng joalo e ka fokotsa ho solderability kapa botsitso ba khokahanyo ea hona joale.Ho phaella moo, haeba ho na le likhokahano tsa tšepe, "menoana ea khauta" hangata e koahetsoe ka khauta ka nako ena ho netefatsa hore ho na le motlakase oa boleng bo phahameng ha o kenngoa ka har'a slot ea ho atolosa.

 

Qetellong, ho na le teko.Lekola PCB bakeng sa marikhoe a makhutšoanyane kapa li-circuits tse bulehileng, ebang ke ka pono kapa ka elektroniki.Mekhoa ea mahlo e sebelisa ho skena ho fumana liphoso karolong ka 'ngoe, 'me tlhahlobo ea elektroniki hangata e sebelisa Flying-Probe ho lekola likhokahano tsohle.Teko ea elektronike e nepahetse haholoanyane ha ho fumanoa lifupi kapa li bula, empa tlhahlobo ea optical e ka lemoha habonolo mathata a nang le likheo tse fosahetseng pakeng tsa li-conductor.



Ka mor'a hore substrate ea boto ea potoloho e phethoe, "boardboard" e phethiloeng e na le likarolo tse sa tšoaneng tsa boholo bo fapaneng karolong ea PCB ho latela litlhoko - pele sebelisa mochine oa ho beha mochine oa SMT ho "solder the IC chip le patch components", ebe ka letsoho. hokela.Hokela mosebetsi o mong o ke keng oa etsoa ke mochini, 'me u lokise likarolo tsena tsa plug-in ho PCB ka ts'ebetso ea wave / reflow soldering, e le hore ho hlahisoe board ea mama.

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