Ngoyilo lomngxuma kwiPCB enesantya esiphezulu

Ngoyilo lomngxuma kwiPCB enesantya esiphezulu

Kuyilo lwePCB olunesantya esiphezulu, umngxuma obonakala ulula uhlala uzisa isiphumo esibi kakhulu kuyilo lwesekethe.Umngxuma wokutyhutyha (VIA) lelinye lawona malungu abalulekileyoiibhodi PCB ezininzi, kunye neendleko zokomba ngokuqhelekileyo zibalelwa kwi-30% ukuya kwi-40% yeendleko zebhodi ye-PCB.Ngamafutshane, wonke umngxuma kwiPCB unokubizwa ngokuba ngumngxuma ophumelayo.

Ukusuka kwindawo yokujonga umsebenzi, imingxuma inokwahlulwa ibe ziindidi ezimbini: enye isetyenziselwa ukudityaniswa kombane phakathi kweengqimba, enye isetyenziselwa ukulungiswa kwesixhobo okanye ukubeka.Ngokwenkqubo yethekhinoloji, le mingxunya yahlulahlulwe ngokubanzi ngokweendidi ezintathu, ezizezi, i-blind via, i-cand through.

Ukuze kuncitshiswe impembelelo embi ebangelwa yimpembelelo yeparasitic yepore, le miba ilandelayo inokwenziwa kangangoko kuyilo:

Ukuqwalasela ixabiso kunye nomgangatho wesignali, umngxuma wobungakanani obufanelekileyo ukhethwa.Umzekelo, kuyilo lwemodyuli ye-6-10 yememori ye-PCB, kungcono ukhethe umngxuma we-10/20mil (umngxuma / iphedi).Kwibhodi encinci enoxinano oluphezulu, ungazama ukusebenzisa umngxuma oyi-8/18mil.Ngetekhnoloji yangoku, kunzima ukusebenzisa imibhobho emincinci.Kuba unikezelo lwamandla okanye umngxuma wocingo lomhlaba unokuqwalaselwa ukusebenzisa ubungakanani obukhulu, ukunciphisa i-impedance.

Ukusuka kwiifomula ezimbini ezixoxwe ngasentla, kunokugqitywa ukuba ukusetyenziswa kwebhodi ye-PCB encinci kunenzuzo ekunciphiseni iiparamitha ezimbini ze-parasitic ze-pore.

Izikhonkwane zobonelelo lwamandla kunye nomhlaba kufuneka zigrunjwe kufutshane.Imfutshane ikhokelela phakathi kwezikhonkwane kunye nemingxuma, ingcono, njengoko iya kukhokelela ekunyuseni kwe-inductance.Kwangaxeshanye, unikezelo lwamandla kunye nezikhokelo zomhlaba kufuneka zibe ngqindilili kangangoko ukunciphisa i-impedance.

Iingcingo zomqondiso kwiibhodi yePCB enesantya esiphezuluakufuneki utshintshe iileya kangangoko, oko kukuthi, ukunciphisa imingxuma engeyomfuneko.

Eminye imingxunya ephantsi ibekwe kufutshane nemingxunya ekumaleko wotshintshiselwano lomqondiso ukubonelela ngelophu esondeleyo yomqondiso.Unokude ubeke imingxuma emininzi eyongezelelweyo emhlabeniibhodi PCB.Ewe kunjalo, kufuneka ube bhetyebhetye kuyilo lwakho.Imodeli yomngxuma ophumela kuyo ekuxoxwe ngayo ngasentla ineepads kumaleko ngamnye.Ngamanye amaxesha, sinokunciphisa okanye sisuse iipads kwezinye iileya.

Ngokukodwa kwimeko yobuninzi be-pore enkulu, kunokukhokelela ekubunjweni kwe-groove ephukileyo kwi-copper layering yesiphaluka sokwahlula.Ukuyicombulula le ngxaki, ngaphezu kokuhambisa indawo yepore, sinokuphinda sicinge ngokunciphisa ubungakanani be-solder pad kwi-copper layering.

Indlela yokusebenzisa ngaphezulu kwemingxuma: Ngolu hlalutyo lungentla lweempawu zeparasitic zemingxuma engaphezulu, sinokubona ukuba ngaphakathiPCB enesantya esiphezuluuyilo, usetyenziso olubonakala lulula olungafanelekanga lwemingxuma ngaphezulu luya kuhlala luzisa iziphumo ezingalunganga kuyilo lwesekethe.