Sankhani zipangizo zoyenera PCB angapo

Mu positi iyi yabulogu, tikambirana mfundo zazikuluzikulu ndi malangizo pakusankha zida zabwino kwambiri za PCB zingapo.

Mukamapanga ndi kupanga ma board ozungulira ma multilayer, chimodzi mwazinthu zofunika kwambiri kuziganizira ndikusankha zida zoyenera. Kusankha zipangizo zoyenera pa bolodi lozungulira la multilayer, kuphatikizapo gawo lapansi ndi zojambulazo zamkuwa, zingakhudze kwambiri ntchito ndi kudalirika kwa chinthu chomaliza.

Kumvetsetsa ntchito ya gawo lapansi

Zomwe zili m'munsi ndizo maziko a matabwa amtundu wa multifunctional. Zimagwira ntchito yofunika kwambiri popereka chithandizo chamakina, kusungunula magetsi komanso kutulutsa kutentha mkati mwa board board. Chifukwa chake, kusankha gawo lapansi loyenera ndikofunikira kuti muwonetsetse kudalirika komanso magwiridwe antchito a board board.

Posankha gawo lapansi la board ya multilayer, pali zinthu zingapo zomwe muyenera kuziganizira. Magawo omwe amagwiritsidwa ntchito kwambiri ndi FR-4, polyimide ndi zida za ceramic. Chilichonse chili ndi katundu wapadera komanso zopindulitsa kuti zigwirizane ndi zofunikira zosiyanasiyana zama board.

1. FR-4:FR-4 ndi gawo lapansi lomwe limagwiritsidwa ntchito kwambiri lomwe limadziwika chifukwa champhamvu zake zotchinjiriza zamagetsi komanso mphamvu zamakina. Amakhala ndi wosanjikiza woonda wa epoxy resin reinforced fiberglass. FR-4 ndiyotsika mtengo, imapezeka mosavuta, komanso ndiyoyenera kugwiritsa ntchito zambiri. Komabe, chifukwa cha kuchuluka kwake kwa dielectric pafupipafupi komanso kutayika kwa tangent, sikungakhale koyenera kupanga ma frequency apamwamba.

2. Polyimide:Polyimide ndi yabwino kwa mapulogalamu omwe amafunikira kusinthasintha, kukana kutentha kwambiri, komanso kukana kwambiri kwamankhwala. Ndizinthu za thermoplastic zomwe zimatha kupirira zovuta zogwirira ntchito. Ma board ozungulira a polyimide amagwiritsidwa ntchito kwambiri m'mafakitale oyendetsa ndege, magalimoto komanso azachipatala komwe mapangidwe opepuka komanso ophatikizika ndi ofunikira.

3. Zida za Ceramic:Pazinthu zapadera zomwe zimafunikira kutenthetsa kwambiri komanso kutsekemera kwamagetsi kwabwino kwambiri, zida za ceramic monga aluminium nitride kapena aluminium oxide ndizosankha koyamba. Zidazi zili ndi zinthu zabwino kwambiri zotentha ndipo zimatha kugwira ntchito yamphamvu kwambiri.

Unikani Njira Zopangira Copper Cladding

Copper clad zojambulazo zimakhala ngati conductive wosanjikiza mu multilayer circuit board. Amapereka njira zamagetsi ndi kulumikizana pakati pa zigawo zosiyanasiyana ndi mabwalo. Posankha zojambulazo za mkuwa, pali zinthu ziwiri zofunika kuziganizira: makulidwe a zojambulazo ndi mtundu wa zomatira.

1.Makulidwe a foil:Chovala chamkuwa chimakhala ndi makulidwe osiyanasiyana, nthawi zambiri kuyambira 1 ounce mpaka 6 ounces. Makulidwe amatsimikizira mphamvu yonyamulira ya gulu ladera. Zojambula zokhuthala zimatha kunyamula katundu wokulirapo koma zitha kukhala zochepa kuti zitheke kutsata m'lifupi mwake komanso motalikirana. Choncho, ndikofunikira kuyesa zofunikira zamakono za dera ndikusankha makulidwe a zojambulazo zomwe zidzakwaniritse zofunikira zamakono.

2.Mtundu womatira:Chovala chamkuwa chokhala ndi acrylic kapena epoxy adhesive. Zojambula zomatira za Acrylic ndizokonda zachilengedwe, zosavuta kukonza komanso zotsika mtengo. Komano, zomata zomatira za epoxy zimapereka kukhazikika kwamafuta, kukana mankhwala, komanso kumamatira. Kusankhidwa kwa zomatira kumadalira zofunikira zenizeni za ntchito.

Konzani njira yosankha zinthu

Kuti mukwaniritse bwino ntchito yosankha zinthu zama board ambiri ozungulira, malangizo otsatirawa ayenera kuganiziridwa:

1. Dziwani zofunikira pakugwiritsa ntchito:Ndikofunikira kumvetsetsa malo ogwirira ntchito, kuchuluka kwa kutentha, kupsinjika kwamakina, ndi zina zomwe zimagwiritsidwa ntchito. Chidziwitsochi chidzatsogolera kusankha kwa zipangizo zomwe zingathe kupirira zofunikira.

2.Gwirani ntchito ndi othandizira:Kufunsana ndi wopereka zida zodziwa zambiri kapena wopanga PCB kungapereke chidziwitso chofunikira pakusankha zida zoyenera kwambiri. Atha kupereka upangiri potengera ukatswiri wawo komanso chidziwitso chakupita patsogolo kwaposachedwa muzinthu zama board ozungulira.

3. Unikani Mtengo ndi Kupezeka:Ngakhale kuti ntchito ndi kudalirika ndizofunikira kwambiri, ndikofunikanso kulingalira za mtengo ndi kupezeka kwa zipangizo zosankhidwa. Onetsetsani kuti zida zosankhidwa ndizotsika mtengo komanso zimapezeka mosavuta mumilingo yofunikira.

Powombetsa mkota

Kusankha zida zoyenera ma PCB angapo ndi gawo lofunikira pakuwonetsetsa magwiridwe antchito, kudalirika komanso magwiridwe antchito a chinthu chomaliza. Kumvetsetsa ntchito ya substrate ndi copper cladding, kuwunika zosankha potengera zofunikira zenizeni, ndikuwongolera njira yosankhidwa kudzathandiza opanga ndi opanga kupeza zotsatira zabwino. Poganizira malangizowa, mainjiniya amatha kusankha molimba mtima zida zoyenera pama board angapo ozungulira, zomwe zimapangitsa kuti pakhale mapangidwe opambana komanso okhalitsa.