Kusanja ndi kuwongolera kukula muzinthu za 2-layer PCB stack-ups

Takulandilani ku blog ya Capel, komwe timakambilana zinthu zonse zokhudzana ndi kupanga PCB. M'nkhaniyi, tithana ndi zovuta zomwe zimafala pakupanga 2-wosanjikiza PCB ndikupereka njira zothetsera kusanja komanso kuwongolera kukula.Capel wakhala wopanga wamkulu wa Rigid-Flex PCB, Flexible PCB, ndi HDI PCB kuyambira 2009. Tili ndi akatswiri opitilira 100 aluso omwe ali ndi zaka zopitilira 15 mumakampani a PCB ndipo tadzipereka kupatsa makasitomala PCB yapamwamba kwambiri. zothetsera.

Kusalalandi mbali yofunika kuiganizira pogwira ntchito ndi PCB stackups monga zimakhudza mwachindunji ntchito yonse ndi kudalirika kwa mankhwala omaliza. PCB yosalala bwino ndiyofunikira pakusokonekera koyenera, kuyika koyenera, komanso kutulutsa kutentha koyenera. Kupatuka kulikonse kuchokera ku flatness kungayambitse kusagwirizana kwa solder, kusokonezeka kwa chigawo, kapena ngakhale kupanikizika pa bolodi la dera lomwe lingayambitse makabudula amagetsi kapena kutsegula.

Dimensional controlndichinthu china chofunikira kwambiri pamapangidwe a PCB, chifukwa chimawonetsetsa kuti bolodiyo ikwanira bwino mkati mwa mpanda wake. Kuwongolera kowoneka bwino kumalola PCB kuphatikizika mosasunthika muzinthu zomaliza, kupewa kusokonezedwa ndi zigawo zina kapena zomangira.

Tiyeni tifufuze mayankho ogwira mtima kuti tigonjetse kuphwanyidwa komanso zovuta zowongolera mu 2-layer PCB stackups.

1. Kusankha zinthu:
Kusankha zinthu zoyenera ndiye maziko a PCB yosalala. Sankhani ma laminates apamwamba kwambiri okhala ndi mawonekedwe okhazikika. Ganizirani kugwiritsa ntchito zipangizo zotsika za CTE (coefficient of thermal expansion) monga FR-4, zomwe zimachepetsa chiopsezo cha nkhondo chifukwa cha kusinthasintha kwa kutentha pakupanga kapena kugwiritsa ntchito.

2. Dongosolo loyenera losanja:
Kukonzekera kwa zigawo mu mulu kungakhudze kwambiri flatness. Onetsetsani kuti zigawozo zikugwirizana bwino komanso kuti zida zapachiyambi ndi prepreg zimagawidwa mofanana. Kulinganiza kugawidwa kwa zigawo zamkuwa mkati mwa stack kumalimbikitsanso kuwonjezeka kwa kutentha kwa yunifolomu, motero kuchepetsa kuthekera kwa nkhondo.

3. Njira zowongolera zolepheretsa:
Kukhazikitsa zilolezo zoyendetsedwa ndi impedance sikofunikira kokha pakuwonetsetsa kwazizindikiro komanso kumathandizira kukhalabe osalala. Gwiritsani ntchito njira zoyendetsedwa ndi impedance kuti mupewe kusiyanasiyana kwakukulu kwa makulidwe amkuwa pa bolodi, zomwe zingayambitse kupindika kapena kupindika.

4. Vias ndi yokutidwa kudzera mabowo:
Kupezeka kwa vias ndi yokutidwa kudzera m'mabowo (PTH) kungayambitse kupsinjika maganizo ndikukhudza flatness. Pewani kuyika ma vias kapena ma PTH m'malo omwe angasokoneze kukhulupirika kwa gululo. M'malo mwake, ganizirani kugwiritsa ntchito njira zakhungu kapena zokwiriridwa kuti muchepetse kuwombana kulikonse komwe kumachitika chifukwa cha kubowola kapena plating.

5. Kasamalidwe ka kutentha:
Kuwonetsetsa kuti kutentha kumatenthedwa bwino ndikofunikira kuti mukhalebe osalala. Thermal vias ntchito kusuntha kutentha kutali mawanga otentha pa bolodi dera. Kuonjezera apo, ganizirani kugwiritsa ntchito ndege yamkuwa kapena choyatsira kutentha kuti muthe kutentha bwino. Kuwongolera kokwanira kwamafuta sikumangoteteza kugwa, komanso kumawonjezera kudalirika kwathunthu kwa PCB.

6. Njira yolondola yopangira:
Gwirani ntchito ndi wopanga odziwika ngati Capel yemwe ali ndi chidziwitso chambiri popanga ma PCB apamwamba kwambiri. Njira zopangira zida zapamwamba, kuphatikiza etching molondola, kuwongolera kowongolera ndi kukanikiza kosiyanasiyana, ndizofunikira kwambiri kuti mukwaniritse kusalala komanso kuwongolera mawonekedwe.

7. Njira zowongolera zabwino:
Njira zowongolera zowongolera bwino zimayendetsedwa nthawi yonse yopanga. Izi zikuphatikiza kuyendera pafupipafupi, njira zapamwamba za metrology komanso kutsatira miyezo yamakampani. Kuwongolera kogwira mtima kumawonetsetsa kuti kuphwanyidwa ndi kuwongolera zofunikira kumakwaniritsidwa nthawi zonse.

Powombetsa mkota,kusalala ndi kuwongolera kowoneka bwino ndikofunikira kuti chipambano cha 2-layer PCB stackup. Posankha mosamala zipangizo, kutsatira ndondomeko yolondola ya stacking, kugwiritsa ntchito njira zowongoka, kuyendetsa bwino kutentha, ndi kugwira ntchito ndi wopanga wodziwa ngati Capel, mukhoza kuthana ndi zovutazi ndikukwaniritsa ntchito zapamwamba za PCB. Osanyengerera pamtundu wa PCB - khulupirirani Capel kuti akwaniritse zosowa zanu zonse za PCB.