Kudzera mu dzenje mapangidwe a HDI PCB

Pamapangidwe apamwamba a PCB, PCB yamitundu ingapo imagwiritsidwa ntchito nthawi zambiri, ndipo kudzera mu dzenje ndi chinthu chofunikira pakupanga kwamitundu yambiri ya PCB. Bowo lodutsa mu PCB limapangidwa makamaka ndi magawo atatu: dzenje, zowotcherera pad pozungulira dzenje ndi gawo lapadera la MPHAMVU. Kenako, timvetsetsa liwiro lalikulu la PCB kudzera pavuto la dzenje ndi zofunikira za kapangidwe.

Mphamvu ya kudzera mu dzenje mu HDI PCB

Mu HDI PCB multilayer board, kulumikizana pakati pa wosanjikiza wina ndi wosanjikiza wina kuyenera kulumikizidwa kudzera mabowo. Pamene mafupipafupi ndi ochepera 1 GHz, mabowo amatha kugwira ntchito yabwino polumikizana, ndipo mphamvu ya parasitic ndi inductance imatha kunyalanyazidwa. Pamene mafupipafupi ndi apamwamba kuposa 1 GHz, zotsatira za parasitic zotsatira za bowo pa kukhulupirika kwa siginecha sizinganyalanyazidwe. Pakadali pano, bowolo likuwonetsa kusokoneza kosalekeza panjira yopatsira, zomwe zingayambitse kuwonetsa ma siginecha, kuchedwa, kuchepetsedwa ndi zovuta zina za kukhulupirika kwa chizindikiro.

Chizindikirocho chikatumizidwa kumalo ena kudzera mu dzenje, gawo lofotokozera la mzere wa chizindikiro limagwiranso ntchito ngati njira yobwereranso ya chizindikiro kupyolera mu dzenje, ndipo kubwereza kwapano kudzayenderera pakati pa zigawo zowonetsera kupyolera mu kugwirizana kwa capacitive, kuchititsa mabomba apansi ndi mabomba. mavuto ena.

Mtundu wa Ngakhale-Hole, Nthawi zambiri, kudzera mu dzenje amagawidwa m'magulu atatu: kudzera mu dzenje, dzenje lakhungu ndi dzenje lokwiriridwa.

Bowo lakhungu: dzenje lomwe lili pamwamba ndi pansi pa bolodi losindikizidwa, lokhala ndi kuya kwina kwa kulumikizana pakati pa mzere wapamwamba ndi mzere wamkati wamkati. Kuzama kwa dzenje nthawi zambiri sikudutsa chiŵerengero china cha pobowo.

Bowo lokwiriridwa: dzenje lolumikizira mkati mwa bolodi losindikizidwa lomwe silimapitilira pamwamba pa bolodi ladera.

Kupyolera mu dzenje: dzenjeli limadutsa pa bolodi lonse la dera ndipo lingagwiritsidwe ntchito polumikizana mkati kapena ngati dzenje loyikapo zigawo. Chifukwa njira yodutsamo ndi yosavuta kukwaniritsa, mtengo wake ndi wotsika, kotero kuti makina osindikizira amagwiritsidwa ntchito.

Kupyolera mu dzenje kapangidwe mu mkulu liwiro PCB

Mu mapangidwe othamanga kwambiri a PCB, dzenje lowoneka ngati losavuta la VIA nthawi zambiri limabweretsa zotsatira zoyipa pamapangidwe adera.

(1) kusankha wololera dzenje kukula.Pa PCB kapangidwe ndi Mipikisano wosanjikiza kachulukidwe wamba, ndi bwino kusankha 0.25mm/0.51mm/0.91mm (bowola dzenje / kuwotcherera PAD/MHAMVU kudzipatula dera) kudzera dzenje. Pakuti ena mkulu- kachulukidwe PCB angagwiritsenso ntchito 0.20mm/0.46mm/0.86mm kudzera dzenje, angathenso kuyesa osadutsa dzenje; Pakuti magetsi kapena dzenje pansi waya akhoza kuonedwa ntchito yaikulu kukula kuchepetsa impedance;

(2) malo odzipatula okha a MPHAMVU, ndibwino. Poganizira kachulukidwe kabowo pa PCB, nthawi zambiri imakhala D1=D2+0.41;

(3) yesetsani kuti musasinthe mawonekedwe a chizindikiro pa PCB, ndiye kuti, yesetsani kuchepetsa dzenje;

(4) kugwiritsa ntchito PCB woonda kumathandiza kuchepetsa magawo awiri a parasitic kudzera mu dzenje;

(5) pini ya magetsi ndi nthaka iyenera kukhala pafupi ndi dzenje. Kufupikitsa kutsogolo pakati pa dzenje ndi pini, ndibwino, chifukwa zidzatsogolera kuwonjezeka kwa inductance.Pa nthawi yomweyo, magetsi ndi kutsogolera pansi ayenera kukhala wandiweyani momwe angathere kuti achepetse kusokoneza;

(6) ikani njira zina zoyambira pafupi ndi mabowo amtundu wosinthitsa ma siginecha kuti mupereke njira yayifupi yolumikizira chizindikirocho.

Komanso, kudzera dzenje kutalika ndi chimodzi mwa zinthu zikuluzikulu zimakhudza kudzera dzenje inductance.Pamwamba ndi pansi chiphaso dzenje, kudutsa dzenje kutalika ndi wofanana PCB makulidwe. Chifukwa cha kuchuluka kwa zigawo za PCB, makulidwe a PCB nthawi zambiri amafika kuposa 5 mm.

Komabe, mu mawonekedwe othamanga kwambiri a PCB, pofuna kuchepetsa vuto lomwe limayambitsa dzenje, kutalika kwa dzenje kumayendetsedwa mkati mwa 2.0mm. kukula mwa kuonjezera dzenje diameter.Pamene kupyolera-dzenje kutalika ndi 1.0mm ndi pansipa, mulingo woyenera kwambiri kudzera-dzenje kabowo ndi 0.20mm ~ 0.30mm.