Barka da zuwa gidan yanar gizon mu.

Menene buƙatun tsari don allon da'ira na PCB?

1. Girman PCB
【Bayanin Bayani】 GirmanPCByana iyakance ta ikon kayan aikin samar da kayan aikin lantarki.Saboda haka, ya kamata a yi la'akari da girman PCB da ya dace a cikin ƙirar tsarin tsarin samfur.
(1) Matsakaicin girman PCB da kayan aikin SMT ke iya hawa ya samo asali ne daga daidaitattun girman takardar PCB, yawancin su 20″ × 24″, wato, 508mm × 610mm ( nisa na dogo)
(2) Girman da aka ba da shawarar shine daidaitaccen girman kowane kayan aiki a cikin layin samar da SMT, wanda ya dace da samar da kayan aiki na kowane kayan aiki da kuma kawar da tarkacen kayan aiki.
(3) Don ƙananan PCBs, ya kamata a tsara shi azaman ƙaddamarwa don inganta ingantaccen samar da duk layin samarwa.
【Buƙatun ƙira】
(1) Gabaɗaya, ya kamata a iyakance girman girman PCB a cikin kewayon 460mm × 610mm.
(2) Girman girman da aka ba da shawarar shine (200 ~ 250) mm × (250 ~ 350) mm, kuma yanayin rabo ya zama <2.
(3) Don PCB mai girman "125mm × 125mm", ya kamata a sanya shi cikin girman da ya dace.

2. siffar PCB
[Bayanin Bayani] Kayan aikin SMT na amfani da layin jagora don jigilar PCBs, kuma PCBs masu sifofi marasa tsari ba za a iya jigilar su ba, musamman PCBs masu daraja a sasanninta.
【Buƙatun ƙira】
(1) Siffar PCB yakamata ya zama murabba'i na yau da kullun tare da sasanninta.
(2) Don tabbatar da kwanciyar hankali na tsarin watsawa, ya kamata a yi la'akari da hanyar ƙaddamarwa don canza PCB mai siffar da ba bisa ka'ida ba zuwa daidaitaccen siffar murabba'i, musamman ma ɓangarorin kusurwa ya kamata a cika su don kauce wa ɓangarorin igiyar ruwa yayin aikin watsawa.Matsakaicin allo allo.
(3) Don allunan SMT masu tsabta, an ba da izinin raguwa, amma girman rata ya kamata ya zama ƙasa da kashi ɗaya bisa uku na tsawon gefen.Ga waɗanda suka wuce wannan buƙatu, ya kamata a cika gefen tsarin ƙira.
(4) Zane-zane na zane-zane na yatsa na zinari ba a buƙatar kawai don tsara zane-zane a gefen sakawa ba, amma har ma don tsarawa (1 ~ 1.5) × 45 ° chamfering a bangarorin biyu na katako na toshe don sauƙaƙe shigarwa.

3. Gefen watsawa
[Bayanin Bayani] Girman gefen isarwa ya dogara da buƙatun layin jagorar isar da kayan aiki.Don injunan bugu, injunan sanyawa da tanderun da aka sake fitarwa, ana buƙatar gabaɗayan isar da shi ya zama fiye da 3.5mm.
【Buƙatun ƙira】
(1) Domin rage nakasawa na PCB a lokacin soldering, da dogon gefen shugabanci na PCB da ba tilastawa ne gaba ɗaya amfani a matsayin watsa shugabanci;don ƙaddamarwa, madaidaicin gefen gefen ya kamata kuma a yi amfani da shi azaman jagorar watsawa.
(2) Gabaɗaya, ana amfani da ɓangarorin biyu na PCB ko jagorar watsawa azaman gefen watsawa.Mafi ƙarancin nisa na gefen watsawa shine 5.0mm.Dole ne babu kayan haɗin gwiwa ko kayan haɗin gwiwa a gaba da baya na gefen watsawa.
(3) A gefen da ba a watsawa ba, babu ƙuntatawa akan kayan aikin SMT, kuma yana da kyau a ajiye yanki na haramtacciyar 2.5mm.

4. Matsayin rami
[Bayanin Bayani] Yawancin matakai kamar sarrafawa, taro, da gwaji suna buƙatar daidaitaccen matsayi na PCB.Don haka, gabaɗaya ana buƙatar tsara ramukan sanyawa.
【Buƙatun ƙira】
(1) Ga kowane PCB, aƙalla ramuka guda biyu yakamata a tsara su, ɗayan an tsara shi azaman da'irar, ɗayan kuma an tsara shi azaman tsagi mai tsayi.Ana amfani da na farko don matsayi kuma ana amfani da na baya don jagora.
Babu wani buƙatu na musamman don buɗewar sakawa, ana iya tsara shi bisa ga ƙayyadaddun masana'antar ku, kuma diamita da aka ba da shawarar sune 2.4mm da 3.0mm.
Sanya ramukan dole su zama ramukan da ba ƙarfe ba.Idan PCB PCB ce mai naushi, yakamata a tsara ramin sakawa tare da farantin ramin don haɓaka rigidity.
Tsawon ramin jagora gabaɗaya ya ninka diamita.
Tsakanin ramin sakawa ya kamata ya zama fiye da 5.0mm daga gefen watsawa, kuma ramukan matsayi guda biyu ya kamata su kasance da nisa kamar yadda zai yiwu.Ana ba da shawarar shirya su a sasanninta na PCB.
(2) Domin gauraye PCBs (PCBAs tare da plug-ins shigar, matsayin matsayi ramukan kamata ya zama iri ɗaya da gaba da baya, ta yadda za a iya raba zane na kayan aiki tsakanin gaba da baya, kamar dunƙule. Hakanan za'a iya amfani da madaidaicin ƙasa don tiren toshe.

 

5. Sanya alamomi
[Bayanin Bayani] Injin jeri na zamani, injin bugu, kayan aikin dubawa na gani (AOI), kayan aikin binciken manna solder (SPI), da sauransu duk suna amfani da tsarin saka idanu na gani.Don haka, dole ne a tsara alamomin sakawa na gani akan PCB.
【Buƙatun ƙira】
(1) An raba alamomin matsayi zuwa alamomin matsayi na duniya (Global Fiducial) da alamomin matsayi na gida (Local Fiducial)
Fiducial).Ana amfani da na farko don daidaita dukkan allon, kuma ana amfani da na ƙarshe don sanya ƙananan allunan ko kayan haɗin gwal.
(2) Ana iya tsara alamomin sakawa na gani azaman murabba'ai, lu'u-lu'u, da'ira, giciye, rijiyoyi, da sauransu, tare da tsayin 2.0mm.Gabaɗaya, ana ba da shawarar ƙirƙira ƙirar ma'anar ma'anar tagulla madauwari na Ø1.0m.Idan aka yi la'akari da bambanci tsakanin launi na kayan da yanayin, yanki maras siyarwar 1mm ya fi girma fiye da alamar sakawa na gani, kuma ba a yarda da haruffa a ciki ba.Uku akan allo ɗaya Kasancewa ko rashin tagulla a cikin rufin ciki yakamata su kasance iri ɗaya ƙarƙashin alamar.
(3) A saman PCB tare da abubuwan SMD, ana ba da shawarar shirya alamomin sakawa na gani guda uku a kusurwar allon don sanya sitiriyo na PCB (maki uku sun ƙayyade jirgin sama, kuma ana iya gano kauri na manna mai siyarwa) .
(4) Don ƙaddamarwa, ban da samun alamomin sakawa na gani guda uku a kan dukkan allo, yana da kyau a tsara alamomin sakawa biyu ko uku a sasanninta na kowane allon naúrar.

(5) Don na'urori irin su QFP tare da nisan cibiyar gubar na ≤0.5mm da BGA tare da tazarar tsakiya na ≤0.8mm, ya kamata a saita alamomin sakawa na gani na gida akan diagonal don daidaitaccen matsayi.
(6) Idan akwai abubuwan da aka ɗora a ɓangarorin biyu, kowane gefe ya kamata ya sami alamomin sakawa na gani.
(7) Idan babu ramin sakawa akan PCB, tsakiyar alamar sakawa na gani yakamata ya zama fiye da 6.5mm nesa da gefen watsawa na PCB.Idan akwai ramin sakawa akan PCB, yakamata a tsara tsakiyar alamar sakawa a gefen ramin sakawa kusa da tsakiyar PCB.

https://www.xdwlelectronic.com/customized-pcb-assembly-and-pcba-product/ Musamman PCB Assembly da PCBA

 


Lokacin aikawa: Afrilu-08-2023