Pcb multi-lara oa potoloho baetsi ba boto ba na le litsebi tsa botekgeniki ho etsa lipatlisiso le ntshetsopele sehlopha, ipabola indasteri e tsoetseng pele tshebetso thekenoloji, 'me ba na le mehaho e ka tšeptjoang ea tlhahiso, lisebelisoa tsa liteko le lilaboratori tsa' mele le lik'hemik'hale tse nang le mefuta eohle ea mesebetsi.The FR-4 re bua ka mona ke ho fetisisa ka tloaelo sebelisoa lakane mofuta tlhahiso ea pcb multilayer liboto potoloho.
E ka holimo haholo, e sebelisoang ka ho fetesisa ea copper clad laminate le prepreg lefatšeng ke NEMA e bitsoang FR4.
hoo e ka bang 14% ea kakaretso ea tlhahiso ke le 'ngoe kapa mahlakoreng a mabeli FR-4 boto, le setseng ka 40% ea multi-lera boto ke tšesaane FR -4 laminates.Qetello ea histori ea ho busa ha FR-4's 'maraka ke haholo-holo ka lebaka la hore e feta haholo li-laminates tse entsoeng ka pampiri ka thepa ea mocheso, mongobo o ntlafetseng le ho hanyetsa lik'hemik'hale, matla a phahameng a flexural le matla a matle a peel..FR4 ke laminate ea pele e ka sebelisoang bakeng sa liphanele tse nang le mahlakore a mabeli a selemo ka lebaka la ho hanyetsa mongobo le lik'hemik'hale tsa lik'hemik'hale.Hape, boleng ba FR-4's ba chelete bo ke ke ba hlōloa.Ha lilemo li ntse li feta, indasteri e nahanne hore FR-4 e tla fana ka lisebelisoa tse ncha tse entsoeng ka laminate tse loketseng bakeng sa bongata bo phahameng ba kopano.Leha ho le joalo, ka lebaka la lithibelo tsa litšenyehelo, baqapi ba liboto tsa potoloho ba ntse ba batla litsela tsa ho sebelisa FR-4 likopanong tse phahameng haholo.
Thepa e matlafatsang e sebelisetsoang FR4 laminates ke khalase ea elektronike Wib (E-glass).Ka lebaka la thepa ea eona e ntle ka ho khetheha ea mechine, thepa ea motlakase e khotsofatsang, ho hanyetsa mocheso, ho hanyetsa mongobo le ho hanyetsa acid, lesela la fiber ea khalase ea E-type e fetohile thepa e ntle haholo ea ho matlafatsa motlakase.Masela ohle a sebelisoang ho FR4 a na le sebopeho sa bokaholimo bo boreleli ho latela mokhoa oa ho loha baskete, 'me bokaholimo bo koahetsoe ka pente ho matlafatsa lenonyeletso lipakeng tsa likhoele tsa khalase le li-resin tsa tlhaho.Nakong ea ts'ebetso ea ho ohla, botenya le palo ea likhoele tsa khalase li khethoa.Boima ba mantlha le botenya ba lesela le phethiloeng bo ikemiselitsoe, botenya ba lesela la fiber ea khalase le sebelisoang bakeng sa boto e hatisitsoeng bo boholo ho tloha ho 6 ho isa ho 172m, mme prepreg e entsoeng ka lesela la fiber ea khalase e etsa qeto ea botenya ba laminate.Ka kakaretso, botenya ba FR4 laminate ke bam ~ 1L57mm (ho eketseha ka linako tse ling tsa 25pm), 'me botenya bo khethehileng bo itšetlehile ka mofuta oa lesela la fiber ea khalase le lihlahisoa tsa tlhaho tsa letlapa la lik'hemik'hale tse sebelisoang.Ts'ebetso ea laminate e khethoa haholo ke sebopeho, kaha moreki o tlameha ho etsa litlhoko tse hlokolosi, 'me bakeng sa botenya bo fanoeng, ho na le meaho e mengata e ka fihlelang mamello e fanoeng.Ho fapana ha lintho tsa tlhaho tsa resin (ka linako tse ling ho thoe ke karo-karolelano ea lehong ho lesela la fiberglass) e tla ama thepa ea laminate.
Sistimi e akaretsang ea resin ea tlhaho ea epoxy e entsoe ka metsoako e fapaneng e sebetsang ea epoxy, 'me resin ea tlhaho ea epoxy e sa sebetseng hantle (e' ngoe le e 'ngoe ea likarolo tsa eona) e fumanoa ka ho kopanya sehlopha se le seng sa epoxy le tetrabromofluorescein A (TBPA).Ho na le metsoako e 'meli ea oksijene ea epoxy e sebetsang ka har'a ketane ea polymer), joalokaha ho bontšitsoe setšoantšong sa 4.6.Bolelele ba ketane pakeng tsa lihlopha bo etsa qeto ea ho tiea ha laminate le thepa ea mocheso ea laminate.Nakong ea ts'ebetso ea ho folisa, lihlopha tsa oksijene ea epoxy li itšoara ka moemeli oa ho folisa ho qala matrix a polymer a mararo-dimensional.E le karolo ea ketane ea polymer, Wakamura bromine e eketsoa ho TBBPA, e etsang hore TBPA e be le thepa e khethehileng e thibelang malakabe.Ho latela Underwriters Laboratories
(Underwriters Laboratory) Teko ea UL94, e le ho etsa laminate e phethiloeng ka V0 boemo ba lelakabe retardancy, ho hlokahala ho eketsa bromine pakeng tsa 16% le 21% ka boima ba 'mele.
The pcb potoloho boto lihlahisoa ka pcb multilayer boto baetsi ba liboto koahela 2-28 lera mapolanka, HDI mapolanka, phahameng TG teteaneng koporo mapolanka, mapolanka bonolo le thata bonding, mapolanka phahameng maqhubu, laminates tsoakiloeng mecha ea litaba, foufetseng patoa ka mapolanka, substrates tšepe 'me ha ho. Letlapa la Halogen.Molemo oa potoloho ea libese ea Shenzhen e teng ka mefuta e mengata ea li-wrenches tse bohareng ba ho ea holimo, 'me theko e ntse e le theko e tlaase haholo,' me e se e le boemong bo ka sehloohong lefapheng la pcb.
Nako ea poso: Aug-08-2022