Ndi zinthu ziti zomwe zimakhudza mtengo wa PCB kupanga? Iyi ndi mutu wosangalatsa kwa aliyense wokhudzana ndi mafakitale a PCB. Imodzi mwamitu yomwe imakonda kutchulidwa mukamalandira NCAB kasitomala imalandira. M’gawo lino, tiwunikiranso pazinthu zomwe zimatsimikizira mtengo wovuta pakupanga kwa PCB.

Ponseponse, 80% mpaka 90% ya COST yathunthu ya PCB imayikidwiratu kumtunda kwa zopezera katundu, wogulitsa (EMS chomera, wopanga PCB, ndi zina zambiri) asanawone PCB. Titha kugawa zomwe zimapangitsa kupanga PCB kukhala magawo awiri – “zinthu zovuta” ndi “zobisika mtengo”.

Ponena za mtengo wolimba pakupanga kwa PCB, ziyenera kukhala ndi zinthu zina zofunika mtengo, monga kukula kwa PCB. Ndizodziwika bwino kuti kukula kwa PCB, ndikofunika zambiri, motero kumawonjezera mtengo. Ngati tigwiritsa ntchito kukula kwa mbale 2L ya 2 × 2 ″ monga momwe zilili, ndikuwonjezera kukula mpaka 4 × 4 ″ kukweza mtengo wazinthu zoyambira ndi 4. Zofunikira zakuthupi sizongokhala zofunikira pa X ndi Y axes, komanso pamizere ya Z. Izi ndichifukwa choti bolodi lililonse lalikulu lomwe limawonjezeredwa pa lamination limafunikira zida zowonjezera, kuphatikiza kusamalira, kusindikiza,

Nthawi yomweyo, kusankha kwa zida kumakhudzanso mtengo, mtengo wama mbale apamwamba (M4, M6, etc.) ndiokwera kuposa wamba wa FR4. In general, we recommend that customers specify a particular sheet with the option of “or equivalent material”, so that the factory can properly allocate the use of materials to meet the needs of the customer and avoid a long sheet procurement cycle.

Kuvuta kwa PCB kumakhudzanso mtengo. Ma multilaminates akagwiritsidwa ntchito ndikapangidwe akhungu, oyika m’manda, kapena akhungu, mtengo wake udzawonjezeka. Akatswiri akuyenera kudziwa kuti kugwiritsa ntchito dzenje lomwe limayikidwa sikuti kumangowonjezera kubowoleza, komanso kumawonjezera nthawi yakukakamira. Pofuna kupanga mabowo akhungu, bolodi loyendetsa dera limayenera kukanikizidwa, kubowola ndi kusanjikiza ma electroplated nthawi zambiri, zomwe zimapangitsa kuti mitengo yopanga iwonjeze.

Chinthu china chofunikira kuganizira ndi jigsaw puzzle. Njira yosonkhanitsira bolodi idzakhudza magwiritsidwe ntchito azinthuzo. Ngati sikofunikira, padzakhala malo ochulukirapo pakati pa bolodi ndi m’mphepete mwake, zomwe ziziwononga bolodi. M’malo mwake, kuchepetsa malo pakati pa matabwa ndi kukula kwa m’mphepete mwake kumathandizira kugwiritsa ntchito bolodi. Ngati bolodi la dera lidapangidwa ngati laling’ono kapena laling’ono, v-cut yokhala ndi malo “0” ipangitsa kugwiritsa ntchito matabwa.

Kutalikirana kwa mizere yayitali ndichimodzi mwazinthu zomwe zimakhudza mtengo. Kukula kwazitali m’lifupi ndi kutalika kwa mzere, kukwera kwa zofunikira pakukonzekera kwa fakitare, kukapangira kuti kumakhala kovuta kwambiri, kumatha kuwoneka ngati bolodi lazinyalala. Ngati komiti yoyang’anira dera ndiyotalika kapena yolumikizidwa, kuthekera kwakulephera kumawonjezeka ndipo mtengo ukuwonjezeka.

Chiwerengero ndi kukula kwa mabowo kumakhudzanso mtengo. Mabowo ang’onoang’ono kwambiri kapena ochulukirapo amatha kukweza mtengo wa board. Tinthu tating’onoting’ono timakhalanso ndi tating’onoting’ono tating’onoting’ono, timachepetsa kuchuluka kwama board oyenda omwe amatha kubowola mozungulira kamodzi. Kutalika kwakanthawi kwamayendedwe a bit kumathandizanso kuchepetsa kuchuluka kwama board omwe amatha kubowola nthawi imodzi. Chifukwa makina obowolera a CNC amafunikira ntchito zingapo, ndalama zantchito zitha kukwezanso. Kuphatikiza apo, kuchuluka kwa kabowo kuyenera kulingaliridwa. Kuboola mabowo ang’onoang’ono m’mapaleti owonjezera kumawonjezeranso mtengo ndipo kumafunikira kuthekera kwa kupanga kwa fakitaleyo.

Chomaliza chamtengo wovuta ndichachipatala cha PCB. Mapeto apadera monga golide wolimba, golide wandiweyani kapena faifi tambala palladium amatha kuwonjezera ndalama zina. Ponseponse, zisankho zomwe mumapanga panthawi ya kapangidwe ka PCB zimatha kukhudza mtengo womaliza wa PCB. NCAB ilimbikitsa kuti ogulitsa ma PCB atenge nawo gawo pakupanga zinthu mwachangu kuti zitheke kuwononga ndalama mosafunikira pambuyo pake.