Fr-4 e tlameha ho tsejoa pele ho boto ea PCB

Fr4 o tlameha ho tsejoa pele ho boto ea PCB

Ha re beha taelo ea fektheri ea pcB ea PCB, hangata ho na le mofuta oa boto ea FR-4 ho khetha ho. Hajoale, ho na le mefuta e meraro ea mefuta ea board: FR-4, board ea aluminium, le ho arohana letoro ea koporo ea koporo.

1. FR-4, hape e ngotsoe joalo ka FR4, ke lebitso le sehlopha se tloaelehileng

Lisebelisoa tse entsoeng ka hanyane tse sebelisoang ho etsa li-PCbs tse hatisitsoeng ka likarolo tse 3: Rein, lisebelisoa tsa matlafatso le foil coil.

Fr in the standiation ea nema e bolela lelaba-redard "e bolela hore taba ea ho e khetholla thepa e 'ngoe ea boemo bo le bong Mera ea ho phomola ea malakabe ea Flame ea Flame ea Flame 1, FR-2 e Ul 94V-1, lisebelisoa le lisebelisoa li sebelisoa le tsona li sebelisoa.

2. Tefo ea Ts'ebetso ea FR-4
Sebaka sa FR-4 ke sisteme ea nako e telele, ka hona, index e atileng haholo e sebelisetsoang ho khethoa ha liketsahalo tsa IPC-4101.

Khoele ea Kholo ea Khalase TG

Boleng ba TG ba sistimi e bua ka palo ea mocheso eo ho eona lintho tse fetohang ho tsoa ho tse thata kapa " Phetoho ena ea li-armodynamic e lula e fetoha hantle ha feela polokelo e sa bolaeloa. Ka mantsoe a mang, ha thepa e fafalitsoe ka mocheso o tloaelehileng oa mocheso ho ea mochesong oa TG, ebe o kotula ka tlase ho boleng ba TG, e ka oela boemong bo thata le thepa e tšoanang le ea pele. Leha ho le joalo, ha thepa e futhumatsoa ho lithemparetjha ka holim'a eona, ho ka hlaha liphetoho tse ke keng tsa feto-fetoha. Matla a mocheso ona a amana haholo le mofuta oa boitsebiso hape hape o na le ho bolaoa ha polokelo.

Ka kakaretso, le ho feta letheba la substrate, ho khothatsa boitsebiso. Haeba ts'ebetso ea morero oa ho etella pele e amohuoa, mocheso o futhumetseng (TD) oa thepa ea motheo hape e hloka ho tsotelloa.

Lisosa tse ling tsa bohlokoa tsa tšebetso li kenyelletsa cormeniver ea ho qholotsa ka setopo (cte), thepa ea metsi, ebile e sebelisoa liteko [1]

3. phapang ea fr-4

Lesela la fiber tsa khalase le sebelisoa e le thepa ea ho tsitsipana, sistimi ea polokelo ke thepa ea polokelo ea EPOEX le Tekanyo ea Lelato ea Ul 94v-0 ke FR-4. Na ho na le phapang e itseng lipakeng tsa sehlopha se seholo sa thepa?

Arola ho latela boleng ba TG


Phapang e hlakileng ka ho fetisisa lipakeng tsa lisebelisoa tsa FR-4 ke boleng ba TG-4. Ho latela mocheso oa TG, maqephe a 4 ka kakaretso a arotsoe ka tg, merusu e bohareng ea TG le lishira tse phahameng.

Indastering, FR-4 ka tig ea batho ba ka bang 135 ° C hangata e khethollotsoe e le leqephe le tlase la tg; FR-4 e nang le tg e ka bang 150 ° C ke pampiri e mahareng; le fr-4 ka tg ea hoo e ka bang 170 ° C e khethollotsoe e le leqephe le phahameng la tg.

Haeba ho na le makhetlo a mangata a hatellang ka har'a PCB ts'ebetso ea PCB, kapa palo ea likarolo tse fetang 14 li phahame (≥230 ° C), kapa mocheso o sebetsang o phahame (ho feta 100 ° C , kapa le meea e nang le likhatello e futhumetseng e kholo (joalo ka setlolo sa maqhubu), se lokela ho khetha poleiti e phahameng ea TG.

Arola ho latela tahlehelo.

Fr-4 e ka aroloa:

Discome e tloaelehileng (DFK0.02)
Poleiti e mahareng e bohareng (0.01 <df <0,02)
Poleiti e tlase ea tahlehelo (0.005 <df <0,01)
Lattra-low

Paki efe kapa efe ea lipotso, ka kopo ikopanye le thekiso@honyplasts.com