Iyo huru conductor zvinhu zvinoshandiswa muPCBs ndeyefoil yemhangura, iyo inoshandiswa kutumira zviratidzo uye mafungu. Panguva imwecheteyo, foil yemhangura paPCB inogona zvakare kushandiswa sendege yekutarisa kudzora iyo impedance yetambo yekutapurirana, kana senhoo yekudzvinyirira electromagnetic interference (EMI). Panguva imwecheteyo, muPCB yekugadzira maitiro, iyo peel simba, etching kuita uye humwe hunhu hwemhangura foil zvinokanganisawo kunaka uye kuvimbika kwePCB kugadzira. PCB Layout mainjiniya anofanirwa kunzwisisa aya maitiro kuti ave nechokwadi chekuti PCB yekugadzira maitiro inogona kuitwa zvinobudirira.
Copper foil yeakadhindwa edunhu mabhodhi ane electrolytic copper foil (electrodeposited ED copper foil) uye calendered annealed mhangura foil (rolled annealed RA copper foil) mhando mbiri, yekutanga kuburikidza ne electroplating nzira yekugadzira, iyo yekupedzisira kuburikidza nenzira yekukunguruka yekugadzira. MumaPCB akaomarara, mafoiri emhangura e electrolytic anonyanya kushandiswa, nepo akakungurutswa annealed mafoiri emhangura anonyanya kushandiswa kumabhodhi edunhu anochinjika.
Zvekushandisa mumabhodhi edunhu akadhindwa, pane musiyano mukuru pakati pe electrolytic uye calendered copper foils. Electrolytic copper foils ine maitiro akasiyana pamativi avo maviri, kureva, kushata kwenzvimbo mbiri dzefoiri hakuna kufanana. Sezvo mafambisirwo edunhu uye mareti achiwedzera, hunhu hwakananga hwemhangura foil hunogona kukanganisa kushanda kwemamirimita wave (mm Wave) frequency uye high speed digital (HSD) masekete. Copper foil pamusoro roughness inogona kukanganisa PCB yekuisa kurasikirwa, kuenzana kwechikamu, uye kunonoka kuparadzira. Copper foil pamusoro roughness inogona kukonzera kusiyana kwekuita kubva kune imwe PCB kuenda kune imwe pamwe nekusiyana kwekuita kwemagetsi kubva kune imwe PCB kuenda kune imwe. Kunzwisisa basa remapepa emhangura mukushanda kwepamusoro-soro, matunhu akakwirira-anomhanya anogona kubatsira kukwidziridza uye kunyatsotevedzera maitiro ekugadzira kubva kumuenzaniso kuenda kudunhu chairo.
Kushata kwepamusoro kwefoiri yemhangura kwakakosha pakugadzira PCB
Iyo ine hutsinye hwepamusoro chimiro inobatsira kusimbisa kunamatira kwemhangura foil kune resin system. Nekudaro, iyo rougher surface profile ingada kureba etching nguva, izvo zvinogona kukanganisa bhodhi kugadzira uye mutsara pateni kurongeka. Kuwedzera etching nguva inoreva kuwedzera lateral etching ye conductor uye zvakanyanya kuomarara mativi etching ye conductor. Izvi zvinoita kuti kugadzira mitsetse yakanaka uye impedance kudzora kuome. Uye zvakare, mhedzisiro yemhangura foil roughness pachiratidzo attenuation inova pachena sezvo dunhu rekushanda frequency rinowedzera. Pamafaro epamusoro, mamwe masaini emagetsi anofambiswa kuburikidza nepamusoro pe conductor, uye nzvimbo yakaoma inoita kuti chiratidzo chifambe chinhambwe chakareba, zvichikonzera kudzikisira kana kurasikirwa kukuru. Naizvozvo, yakakwirira-inoshanda substrates inoda yakaderera roughness mhangura foils ane adhesion zvakakwana kuti aenderane yakakwirira-kuita resin masisitimu.
Kunyange zvazvo maapplication akawanda paPCBs nhasi ane hukobvu hwemhangura hwe1/2oz (approx. 18μm), 1oz (approx. 35μm) uye 2oz (approx. 70μm), nharembozha ndechimwe chezvinhu zvinoita kuti PCB makobvu emhangura ave mutete se 1μm, ukuwo ukuru hwemhangura hwe100μm kana kupfuura huchave hwakakosha zvakare nekuda kwekushandisa kutsva (semuenzaniso mota dzemagetsi, mwenje we LED, nezvimwewo). .
Uye nekuvandudzwa kwe5G millimeter mafungu pamwe neakakwira-speed serial links, kudiwa kwemafoiri emhangura ane yakaderera roughness profiles kuri kuwedzera zvakajeka.
Nguva yekutumira: Kubvumbi-10-2024