M’masiku amakono a digito, kuthamanga ndiye chinthu chofunikira komanso chofunikira kwambiri chomwe chimakulitsa magwiridwe antchito onse. Chifukwa chake, kuwonjezera pa liwiro lazizindikiro lowonjezeka, ziwonetsero zambiri zamagetsi zimadzazidwa ndi maulalo othamanga ambiri, ndipo kuwonjezeka kwa liwiro lazizindikiro kumapangitsa PCB Kukhazikitsa ndi kulumikiza chinthu chofunikira kwambiri pakachitidwe kachitidwe konse. Kuwonjezeka kwazinthu zatsopano zamagetsi kwadzetsa chiwopsezo chowonjezeka pakupanga ma PCB othamanga kwambiri komanso matekinoloje amisonkhano oyenererana bwino ndi zofunikira zovuta za PCB, kuphatikiza kufunika kochepetsa phokoso la PCBS. Phokoso pamakina osindikizidwa ndichinthu chachikulu chomwe chimakhudza magwiridwe antchito. Blog iyi imangoyang’ana njira ndi njira zochepetsera phokoso lapaulendo pa PCB yothamanga kwambiri.

Mapangidwe a PCB omwe amatsimikizira kuti kudalirika kumakhala kotsika komanso phokoso lapa board mu PCB. Mapangidwe a PCB ndi gawo lalikulu kwambiri pakupeza misonkhano yamphamvu ya PCB, yopanga magwiridwe antchito, komanso kapangidwe ka PCB kakhala kotchuka. Kuti izi zitheke, zinthu zofunika ndizophatikiza magwiridwe antchito oyenda bwino, kulumikizana kwa zinthu zolumikizana, zida zama parasitic, kuwongolera ndi kuwongolera njira zopangira ma PCB. Yoyamba ndi kapangidwe kazitsulo komanso magwiridwe antchito a zingwe – zingwe zopota zapansi ndi phokoso lapansi, kusokera kosunthika, kutsekeka kwamtunda wambiri, mizere yotumizira ndi zingwe zophatikizidwa. Pazofunikira zamafupipafupi za liwiro lachizindikiro mwachangu m dera,

Njira zopangira kuthetseratu phokoso lokhala pa PCB yothamanga kwambiri

Phokoso mu PCB lingasokoneze magwiridwe antchito a PCB chifukwa cha kusinthasintha kwamagetsi amagetsi komanso mawonekedwe apano. Werengani njira zina zodzitetezera kuti mupewe zolakwika zomwe zingathandize kukulitsa magwiridwe antchito ndikutchingira phokoso kuchokera ku PCBS yothamanga kwambiri.

Kuchepetsa crosstalk

Crosstalk imagwiritsanso ntchito magetsi ndi magetsi pakati pa mawaya, zingwe, misonkhano yamagetsi, ndi zinthu zomwe zimagwirizanitsidwa ndi kufalitsa kwa magetsi. Crosstalk imadalira kwambiri njira zoyendetsera njira. Crosstalk sichitha kuchitika ngati zingwe zimayendetsedwa mbali. Ngati zingwe zikufanana wina ndi mnzake, crosstalk imatha kuchitika ngati zigawozo sizikhala zazifupi. Njira zina zopewera crosstalk ndikutsitsa kutalika kwa dielectric ndikuwonjezera mpata pakati pama waya.

Mphamvu yamphamvu yosonyeza kukhulupirika

Akatswiri opanga ma PCB akuyenera kulingalira mosamala za ma siginolo ndi mphamvu zamagetsi ndi kuthekera kwa analog kwamapangidwe a PCB othamanga kwambiri. Chimodzi mwazinthu zazikuluzikulu zakapangidwe ka SI yothamanga kwambiri ndi kusankha kwa mizere yolumikizira ma PCB potengera liwiro lachizindikiro, driver IC, ndi zovuta zina zomwe zimathandiza kupewa phokoso la PCB. Liwiro lazizindikiro limathamanga. Kukhulupirika kwamphamvu (PI) ndichinthu chofunikira pakuwunika koyenera kukhazikitsa mapangidwe a PCB othamanga kwambiri omwe amachepetsa phokoso ndikukhalanso ndi bata pachitetezo cha chip.

Pewani mawanga ozizira ozizira

Ndondomeko yolakwika ya welding imatha kubweretsa malo ozizira. Malo olumikizirana bwino amatha kubweretsa mavuto monga kutseguka kosasinthasintha, phokoso lokhala ndi zina zotero. Good! Pofuna kupewa mavuto otere, onetsetsani kuti mukutenthetsa chitsulo moyenera kutentha koyenera. Nsonga yachitsulo yachitsulo iyenera kuyikidwa pamagulu a solder kuti ayitenthe bwino musanagwiritse ntchito solder ku cholumikizira. Mudzawona kusungunuka pa kutentha koyenera; The solder chimakwirira kwathunthu olowa. Njira zina zochepetsera kuwotcherera ndikugwiritsa ntchito kusintha.

Kuchepetsa cheza cha PCB kuti mukwaniritse mapangidwe apansi a PCB

Kapangidwe kolimbidwa kamene kali pafupi mozungulira pamzera ndiye njira yabwino yoyendetsera dera kuti mupewe phokoso lokhala mu PCB. Zofunikira zina pakukwaniritsa mapangidwe a PCB otsika ndikuchepetsa kutulutsa kwa PCB zimaphatikizapo mwayi wochepa wopatukana, kuwonjezera kwa ma resistor otsiriza, kugwiritsa ntchito ma decapling capacitors, kupatukana kwa zigawo za analog ndi digito, ndikudzipatula kwa O / O madera ndikutseka bolodi kapena chizindikirocho pa bolodi ndizoyenera pazosowa za PCBS zaphokoso kwambiri.

Kukhazikitsa mokwanira njira zonsezi pamwambapa ndikumbukira zofunikira zakapangidwe ka projekiti iliyonse ya PCB, kupanga PCB yopanda phokoso sikukayika. Kuti tikhale ndi mapangidwe okwanira kuti tipeze ma PCBS opanda phokoso pamafotokozedwe a EMS, ndichifukwa chake tapanga njira zingapo zopewera phokoso lapa bolodi pa PCB yothamanga kwambiri.