Kwiminyaka emininzi, PCB yamanqanaba amaninzi ibe yimixholo ephambili yecandelo loyilo. Njengoko izinto zombane zicutheka, zivumela iisekethe ezininzi ukuba ziyilwe kwibhodi enye, imisebenzi yazo yonyusa imfuno yoyilo lwePCB entsha kunye nobugcisa bokuvelisa obuxhasayo. Ngamanye amaxesha i-6-layer stacking yebhodi yindlela nje yokufumana amanqaku amaninzi ebhodini kunokuba kuvunyelwe yi-2-layer okanye i-4-layer board. Ngoku, ukwenza ulungelelwaniso oluchanekileyo kwi-stack ye-6-layer ukwandisa ukusebenza kwesekethe kubaluleke kakhulu kunangaphambili.

Ngenxa yokungasebenzi kakuhle kophawu, izitaki zePCB ezilungelelanisiweyo ngendlela engafanelekanga ziya kuchatshazelwa luphazamiseko lwe-electromagnetic interference (EMI). Ngakolunye uhlangothi, i-stack ye-6-layer eyenziwe kakuhle inokuthintela iingxaki ezibangelwa yi-impedance kunye ne-crosstalk, kunye nokuphucula ukusebenza kunye nokuthembeka kwebhodi yesiphaluka. Ukucwangciswa kakuhle kwe-stack kuya kunceda ukukhusela ibhodi yesiphaluka kwimithombo yengxolo yangaphandle. Nantsi eminye imizekelo yolungelelwaniso olucwangcisiweyo lwe-6.

Loluphi olona lungelelwaniso lwestakhi esine-6?

Ukucwangciswa kwe-stacking oyikhethayo kwibhodi ye-6-layer kuya kuxhomekeka kakhulu kuyilo okufuneka ulugqibe. Ukuba unemiqondiso emininzi ekufuneka uhanjiswe kuyo, udinga iileya ezi-4 zesignali zomzila. Ngakolunye uhlangothi, ukuba kuqala kunikwe ukulawula ingqibelelo yesignali yeesekethe zesantya esiphezulu, ukhetho olunika ukhuseleko olungcono lufuna ukukhethwa. Olu lulunye ulungelelwaniso olwahlukileyo olusetyenziswa kwiibhodi ezi-6.

Uqwalaselo loqobo lokupakisha olusetyenziswe kwiminyaka emininzi eyadlulayo kukhetho lokuqala lwesitaki:

1. Umqondiso ophezulu

2. Umqondiso wangaphakathi

3. Inqanaba eliphantsi

4. I-Power Plane

5. Umqondiso wangaphakathi

6. Uphawu olusezantsi

Oku mhlawumbi lolona qwalaselo lubi kakhulu ngenxa yokuba umaleko wesiginali awunayo nanye into ekhuselayo, kwaye ezimbini zomaleko wesiginali azikho kufutshane nenqwelomoya. Njengoko imfezeko yomqondiso kunye neemfuno zokusebenza ziba zibaluleke ngakumbi nangakumbi, olu lungelelwaniso luhlala lushiywe. Nangona kunjalo, ngokutshintsha imigangatho yemiqondiso ephezulu kunye nesezantsi kunye neengqimba zomhlaba, uya kuphinda ufumane isitaki esilungileyo se-6. Ububi kukuba ishiya kuphela iileya ezimbini zangaphakathi zomzila womqondiso.

Olona lungelelwaniso luqhele ukusetyenziswa kwi-6-layer kuyilo lwePCB kukubeka umaleko wendlela yomqondiso wangaphakathi embindini wesitaki:

1. Umqondiso ophezulu

2. Inqanaba eliphantsi

3. Umqondiso wangaphakathi

4. Umqondiso wangaphakathi

5. I-Power Plane

6. Uphawu olusezantsi

Uqwalaselo olucwangcisiweyo lubonelela ngokhuselo olungcono kuluhlu lwangaphakathi lomzila womqondiso, odla ngokusetyenziselwa imiqondiso ephezulu yefrikhwensi. Ngokusebenzisa imathiriyeli etyebileyo ye-dielectric ukwandisa umgama phakathi kweempawu ezimbini zangaphakathi, oku kupakishwa kunokuphuculwa ngcono. Nangona kunjalo, ukungonakali kolu lungelelwaniso kukuba ukuhlukana kwendiza yamandla kunye nenqwelomoya ephantsi kuya kunciphisa i-plane capacitance. Oku kuya kufuna ukudibanisa ngakumbi kuyilo.

I-stack ye-6-layer ilungiselelwe ukwandisa ingqibelelo yesignali kunye nokusebenza kwe-PCB, engaqhelekanga. Apha, umaleko wesignali uncitshiswe ukuya kumaleko ama-3 ukuze ungeze umaleko owongezelelweyo womhlaba:

1. Umqondiso ophezulu

2. Inqanaba eliphantsi

3. Umqondiso wangaphakathi

4. I-Power Plane

5. Inqwelomoya ephantsi

6. Uphawu olusezantsi

Oku kupakishwa kubeka umaleko wophawu ngalunye ecaleni komgangatho womhlaba ukuze ufumane ezona mpawu zibalaseleyo zendlela yokubuya. Ukongezelela, ngokwenza i-plane yamandla kunye ne-plane yomhlaba esecaleni komnye nomnye, i-capacitor yokucwangcisa inokudalwa. Nangona kunjalo, into engalunganga isekukuba ngenene uya kuphulukana nomaleko wophawu lokuhamba.

Sebenzisa izixhobo zoyilo zePCB

Indlela yokudala i-stack of layers iya kuba nempembelelo enkulu kwimpumelelo yoyilo lwe-PCB ye-6-layer. Nangona kunjalo, izixhobo zoyilo zePCB zanamhlanje zinokongeza kwaye zisuse iileya kuyilo ukuze ukhethe naluphi na uqwalaselo lomaleko olufanelekileyo. Inxalenye ebalulekileyo kukukhetha inkqubo yoyilo lwePCB ebonelela ngokuguquguquka okuphezulu kunye nokusetyenziswa kwamandla kuyilo olulula ukwenza uhlobo lwe-6-layer stack.