PCB wedunhu mabhodhi anogona kuoneka kwese kwese mune akasiyana siyana ekushandisa midziyo uye zviridzwa. Kuvimbika kwebhodhi redunhu chivimbiso chakakosha chekuvimbisa kushanda kwakajairika kwemabasa akasiyana. Zvisinei, pamapuranga akawanda edunhu, tinowanzoona mazhinji acho ari nzvimbo huru dzemhangura, kugadzira mapuranga edunhu. Nzvimbo huru dzemhangura dzinoshandiswa.
Kazhinji kutaura, nzvimbo huru mhangura ine mabasa maviri. Imwe ndeyekupisa kupisa. Nemhaka yokuti bhodhi redunhu ikozvino rakakura zvikuru, simba rinokwira. Naizvozvo, kunze kwekuwedzera zvinodikanwa zvinopisa zvinopisa zvikamu, zvakadai semasinki ekupisa, mafeni ekupisa kupisa, nezvimwewo, asi kune mamwe mabhodhi edunhu, hazvina kukwana kuvimba neizvi. Kana iri chete yekupisa kupisa, zvinodikanwa kuti uwedzere solder layer uchiwedzera nzvimbo yemhangura foil, uye kuwedzera tini kuti uwedzere kupisa kupisa.
Zvakakosha kucherechedza kuti nekuda kwenzvimbo huru yemhangura yakavharwa, iyo PCB kana yemhangura foil adhesion ichaderedzwa nekuda kwekureba-wave crest kana kupisa kwenguva refu kwePCB, uye gasi rinoputika rakaunganidzwa mairi harigone kupera. nguva. Iyo foil yemhangura inowedzera uye inodonha, saka kana nzvimbo yemhangura yakakura kwazvo, unofanira kufunga kana pane dambudziko rakadaro, kunyanya kana kutonhora kwakanyanyisa, unogona kuivhura kana kuigadzira segridi mesh.
Imwe yacho ndeyekusimudzira anti-kupindira kugona kwedunhu. Nekuda kwenzvimbo yakakura yemhangura inogona kuderedza kuvharika kwewaya yepasi uye kudzivirira chiratidzo kuti kuderedze kupindirana, kunyanya kune mamwe mabhodhi ePCB akakwira, pamwe nekuomesa waya pasi zvakanyanya sezvinobvira, bhodhi redunhu rinodikanwa. . Ground nzvimbo dzese dzakasununguka, kureva, "ivhu rakazara", iro rinogona kunyatsodzikisa parasitic inductance, uye panguva imwecheteyo, nzvimbo yakakura yevhu inogona kunyatso kudzikisa ruzha radiation. Semuenzaniso, kune mamwe ma touch chip circuits, bhatani rimwe nerimwe rakafukidzwa netambo yepasi, iyo inoderedza kukwanisa kwekudzivirira-kupindira.