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Mfundo zazikuluzikulu zogulira pcb

Mfundo zazikuluzikulu zogulira pcb (4)

Ambiri ogula fakitale yamagetsi asokonezedwa ndi mtengo wa PCB.ngakhale anthu ena omwe ali ndi zaka zambiri zogulira PCB sangamvetsetse chifukwa choyambirira.M'malo mwake, mtengo wa PCB umapangidwa ndi izi:

Choyamba, mitengo ndi osiyana chifukwa zipangizo zosiyanasiyana ntchito PCB.

Kutenga wamba iwiri zigawo pcb mwachitsanzo, laminate zimasiyanasiyana FR-4, CEM-3, etc. ndi ranges makulidwe kuchokera 0.2mm kuti 3.6mm.Makulidwe amkuwa amasiyanasiyana kuchokera ku 0.5Oz mpaka 6Oz, zonse zomwe zidapangitsa kusiyana kwakukulu kwamitengo.Mitengo ya inki ya soldermask imasiyananso ndi zinthu za inki zokhala ndi thermosetting komanso zakuthupi zobiriwira zobiriwira.

Mfundo zazikuluzikulu zogulira pcb (1)

Chachiwiri, mitengo ndi yosiyana chifukwa cha njira zosiyanasiyana zopangira.

Njira zosiyanasiyana zopangira zimabweretsa ndalama zosiyanasiyana.Monga bolodi lopangidwa ndi golidi ndi bolodi lopangidwa ndi malata, mawonekedwe a njira ndi nkhonya, kugwiritsa ntchito mizere ya nsalu ya silika ndi mizere yowuma ya mafilimu idzapanga ndalama zosiyana, zomwe zimapangitsa kusiyana kwa mtengo.

Chachitatu, mitengo ndi yosiyana chifukwa cha zovuta komanso kachulukidwe.

PCB idzakhala yosiyana mtengo ngakhale zipangizo ndi ndondomeko ndi zofanana, koma ndi zovuta zosiyana ndi kachulukidwe.Mwachitsanzo, ngati pali mabowo 1000 pama board onse ozungulira, dzenje la bolodi limodzi ndi lalikulu kuposa 0.6mm ndipo m'mimba mwake la bolodi lina ndi lochepera 0.6mm, zomwe zimapanga ndalama zoboola zosiyanasiyana.Ngati matabwa awiri dera ali ofanana zopempha zina, koma mzere m'lifupi ndi osiyana komanso zimabweretsa mtengo osiyana, monga bolodi m'lifupi ndi lalikulu kuposa 0.2mm, pamene winayo ndi zosakwana 0.2mm.Chifukwa matabwa m'lifupi osakwana 0.2mm ali ndi chiwopsezo chachikulu, zomwe zikutanthauza kuti mtengo wopangira ndi wokwera kuposa wanthawi zonse.

Mfundo zazikuluzikulu zogulira pcb (2)

Chachinayi, mitengo ndi yosiyana chifukwa cha zofunika zosiyanasiyana za makasitomala.

Zofuna zamakasitomala zidzakhudza mwachindunji mlingo wosakhala wolakwika pakupanga.Monga gulu limodzi logwirizana ndi IPC-A-600E class1 limafuna 98% kukhoza, pamene mgwirizano wa kalasi3 umangofunika kukhala ndi 90% yokha yopambana, zomwe zimapangitsa kuti fakitale iwonongeke ndipo pamapeto pake imabweretsa kusintha kwamitengo yazinthu.

Mfundo zazikuluzikulu zogulira pcb (3)

Nthawi yotumiza: Jun-25-2022