PCB bolodi ali wosanjikiza chimodzi, zigawo ziwiri ndi angapo zigawo, amene palibe malire pa chiwerengero cha zigawo za bolodi multilayer. Panopa, pali zigawo zoposa 100 za PCB, ndipo wamba multilayer PCB ndi zigawo zinayi ndi zigawo zisanu ndi chimodzi. Ndiye nchifukwa chiyani anthu amati, "chifukwa chiyani PCB multilayer makamaka ngakhale?" Funso? Ngakhale zigawo zili ndi zabwino zambiri kuposa zosanja zosanja.

1. Mtengo wotsika

Chifukwa cha gawo limodzi la media ndi zojambulazo, mtengo wazinthu zopangira ma PCB owerengeka ndi otsika pang'ono kuposa ma board a PCB owerengeka. Komabe, mtengo wamtengo wapatali wa PCB wosamvetseka ndi wokwera kwambiri kuposa wa PCB. Mtengo wopangira mkati mwa wosanjikiza ndi wofanana, koma mawonekedwe a zojambulazo / pachimake mwachiwonekere amawonjezera mtengo wopangira gawo lakunja.
Odd-wosanjikiza PCB ayenera kuwonjezera sanali muyezo laminated pachimake chomangirira ndondomeko pa maziko a nyukiliya dongosolo ndondomeko.Poyerekeza ndi kapangidwe nyukiliya, mphamvu yopanga zomera ndi zokutira zojambula kunja kwa kapangidwe nyukiliya adzachepa. isanafike laminating, zomwe zimawonjezera chiopsezo cha zokanda ndi etch zolakwika pa wosanjikiza akunja.

2. Kapangidwe kake kuti mupewe kupindika
Chifukwa chabwino chopangira PCBS popanda zigawo zosawerengeka ndikuti zigawo zosawerengeka ndizosavuta kupindika. PCB ikakhazikika pambuyo pa njira yomangirira yozungulira yamitundu ingapo, kukangana kosiyanasiyana kwa laminating pakati pa kapangidwe kachikatikati ndi kapangidwe kamene kamapangidwa ndi zojambulazo kumayambitsa kupindika kwa PCB. Pamene makulidwe a bolodi akuwonjezeka, chiopsezo chopinda cha PCB chokhala ndi zigawo ziwiri zosiyana chimawonjezeka. Chinsinsi chochotseratu kupindika kwa bolodi ndikugwiritsa ntchito kusanjikiza koyenera. zidzachepetsedwa, zomwe zimapangitsa kuti mtengo uwonjezeke.Chifukwa chakuti msonkhano umafuna zipangizo zapadera ndi ndondomeko, kuyika kwa zigawo zolondola kumachepetsedwa, kotero kuwononga khalidwe.

Kusintha kosavuta kumvetsa: mu ndondomeko ya luso PCB, anayi wosanjikiza bolodi kuposa atatu wosanjikiza gulu kulamulira, makamaka mawu a symmetry, ndi warp digiri ya gulu anayi wosanjikiza akhoza kulamulidwa pansi pa 0,7% (IPC600 muyezo), koma atatu wosanjikiza bolodi kukula, warp madigiri adzakhala upambana muyezo, izi zidzakhudza SMT ndi kudalirika kwa mankhwala lonse, kotero mlengi ambiri, si chiwerengero chosamvetseka cha masanjidwe bolodi kapangidwe, ngakhale ntchito wosanjikiza wosanjikiza, adzakhala lakonzedwa kuti bodza wosanjikiza, 5 mapangidwe 6 zigawo, wosanjikiza 7 8 bolodi wosanjikiza.

Pazifukwa pamwambapa, ambiri PCB multilayer amapangidwa ngati zigawo, ndi wosamvetseka zigawo ndi zochepa.