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. Kuchulukirachulukira kwaukadaulo wamagetsi kwadzetsa kufunikira kowonjezereka kwaukadaulo wothamanga kwambiri wa PCB ndi matekinoloje ophatikizira omwe ali oyenerana ndi zofunikira zovuta za PCB, kuphatikiza kufunikira kochepetsa phokoso pa PCB. 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 zodzitetezera kuti mupewe zolakwika zomwe zingathandize kupititsa patsogolo magwiridwe antchito ndikuletsa phokoso kuchokera ku PCB yothamanga kwambiri.

L Kuchepetsa mtanda

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.

L Mphamvu yamphamvu yamphamvu yokhulupirika

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.

L Pewani malo ozizira owotcherera

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.

L Chepetsani ma radiation a PCB kuti mukwaniritse mapangidwe amtundu wa PCB

Kapangidwe kolimbidwa kamene kali pafupi mozungulira pamzera ndiye njira yabwino yoyendetsera dera kuti mupewe phokoso lokhala mu PCB. Zofunikira zina kuti mukwaniritse mapangidwe a PCB a phokoso lochepa komanso kuchepetsa kutulutsa kwa PCB kumaphatikizapo mwayi wochepa wogawanika, kuwonjezera kwa ma terminal resistor angapo, kugwiritsa ntchito ma capacitor odulira, kulekanitsa magawo a analogi ndi digito, komanso kudzipatula kwa I/O. madera ndi kutseka bolodi kapena chizindikiro pa bolodi ndi bwino ndi zosowa za otsika phokoso mkulu-liwiro PCB.

Kukhazikitsa mokwanira njira zonsezi pamwambapa ndikumbukira zofunikira zakapangidwe ka projekiti iliyonse ya PCB, kupanga PCB yopanda phokoso sikukayika. Kuti tikhale ndi zisankho zokwanira zopezera PCB yopanda phokoso mu ndondomeko ya EMS, ndichifukwa chake tapereka njira zosiyanasiyana zopewera phokoso la pa bolodi pa PCB yothamanga kwambiri.