Chidziwitso choyambirira cha zofewa PCB bolodi

Ndi kuwonjezeka kopitilira muyeso wakapangidwe ka PCB yofewa ndikugwiritsa ntchito ndikukweza PCB yolimba, ndizofala kuwonjezera PCB yofewa, yolimba kapena yolimba poyankhula PCB, ndikunena kuti ndi zigawo zingati. Kawirikawiri, PCB zopangidwa ndi zofewa zotetezera kutentha amatchedwa PCB yofewa kapena PCB yosinthasintha, okhwima osinthika a PCB. It ADAPTS to the current electronic products to high-density and high reliability, miniaturization, lightweight direction development needs, but also meets the strict economic requirements and market and technical competition needs.

Abroad, soft PCB has been widely used in the early 1960s. M’dziko lathu, kupanga ndikugwiritsa ntchito kudayamba m’ma 1960. M’zaka zaposachedwa, ndikuphatikizana kwachuma padziko lonse lapansi komanso mzinda wotseguka, komanso kuyambitsidwa kwaukadaulo wopititsira patsogolo ntchito zake ukukula, ena fakitale yaying’ono komanso yaying’ono yolimba ya PCB yomwe cholinga chake ndi kupanga ukadaulo wofewa pa mwayi uwu, kugwiritsa ntchito njira ndikukonzekera Kugwiritsa ntchito kusintha kwa zida zomwe zilipo, kusintha ndikusinthira zofewa za PCB kupanga zosowa zomwe zikukula. In order to further understand PCB, soft PCB process is introduced here.

Gulu la PCB yofewa ndi zabwino zake ndi zovuta zake

1. Gulu la PCB lofewa

Soft PCBS are usually classified according to the layer and structure of the conductor as follows:

1.1 PCB yokhazikika

PCBS yosalala yokha, yokhala ndi gawo limodzi lokha la ochititsa, imatha kukhala nayo kapena sangakhale nayo yokutira pamwamba. The insulation base material used varies with the application of the product. Zida zotetezera zomwe zimagwiritsidwa ntchito zimakhala ndi polyester, polyimide, polytetrafluoroethylene, nsalu yofewa ya epoxy-galasi.

PCB yosalala imodzi imatha kugawidwa m’magulu anayi otsatirawa:

1) Kulumikizana kwamtundu umodzi popanda kuphimba

Mtundu wa waya wamtunduwu wa PCB wofewa uli pagawo lotetezera, ndipo mawonekedwe a wayawo sanaphimbidwe. Ngati yachibadwa umodzi umodzi okhwima PCB. Izi ndizotsika mtengo kwambiri ndipo nthawi zambiri zimagwiritsidwa ntchito posafunikira, kugwiritsa ntchito zachilengedwe. The interconnection is realized by tin welding, fusion welding or pressure welding. Nthawi zambiri amagwiritsidwa ntchito m’ma telefoni oyambilira.

2) kulumikizana kumodzi ndi zokutira zosanjikiza

Poyerekeza ndi ophunzira am’mbuyomu, otsogolera amtunduwu amangokhala ndi zokutira zina pamwamba pake malingana ndi zomwe makasitomala amafuna. Pakuphimba, padi iyenera kuwululidwa, osaphimbidwa kumapeto. Requirements of precision can be used in the form of clearance holes. Ndi imodzi mwamagetsi omwe amagwiritsidwa ntchito kwambiri osasunthika, omwe amagwiritsidwa ntchito kwambiri pazida zamagalimoto ndi zida zamagetsi.

3) Palibe kulumikizana kwapawiri kotetezera

Mtundu wamtundu wolumikizira mbale umatha kulumikizidwa kutsogolo ndi kumbuyo kwa waya. Kuti tichite izi, dzenje limapangidwa mu gawo lotetezera pad. Njirayi imatha kupangidwa ndi kukhomerera, kutchera kapena njira zina pamakina ofunikirako. Amagwiritsidwa ntchito mbali zonse ziwiri zopangira zida, zida ndi mapulogalamu omwe amafunikira kuwotcherera malata. Dera lofikira lilibe gawo lotetezera ndipo malo otere nthawi zambiri amachotsedwa ndi mankhwala.

4) Kulumikizana kozungulira kawiri ndi zigawo zokutira

Kusiyanitsa pakati pa kalasi iyi ndi kalasi yapitayi ndikuti pali chophimba pamwamba. Koma kutsekerako kumakhala ndi mabowo olowera omwe amalolanso kuti athetsedwe mbali zonse ziwiri kwinaku akusungabe. Ma PCBS ofewawa amapangidwa ndi zigawo ziwiri zotetezera komanso chosungira chitsulo. Imagwiritsidwa ntchito pomwe chophimba chikufunika kutetezedwa kuzipangizo zoyandikira, ndikutetezedwa wina ndi mnzake, mbali zonse zam’mbuyo ndi zakumbuyo zolumikizidwa.

1.2 Mbali ziwiri zofewa PCB

Mbali ziwiri zosinthika za PCB zokhala ndi zigawo ziwiri zoyendetsa. Kugwiritsa ntchito ndi maubwino amtunduwu wa PCB wamagulu awiri osinthika ndi ofanana ndi a PCB yokhayo yosunthika, mwayi waukulu kukhala wochulukitsa kachulukidwe ka dera lililonse. Itha kugawidwa: yopanda metallized hole komanso yopanda chimbudzi kutengera kupezeka ndi kusowa kwa dzenje lazitsulo; B yopanda mabowo azitsulo ndikuphimba; C wokhala ndi mabowo azitsulo komanso wopanda chophimba; D pokhala ndi mabowo azitsulo ndi zokutira. Double-sided soft PCBS without overlays are rarely used.