Umhlahlandlela we-FR-4 Weziyingi Eziphrintiwe

Izakhiwo nezici ze-FR-4 noma ze-FR4 ziyenza ibe nezinto ezihlukahlukene kakhulu ngezindleko ezithengekayo. Yingakho ukusetshenziswa kwayo kusakazeke kakhulu ekukhiqizeni isifunda esinyathelisiwe. Ngakho-ke, kuyinto evamile ukuthi sifake i-athikili mayelana nayo kubhulogi yethu.

Kulesi sihloko, uzothola okwengeziwe mayelana:

Izakhiwo nezinzuzo ze-FR4
Izinhlobo ezahlukene ze-FR-4
Izici okufanele zicatshangelwe lapho ukhetha ukushuba
Kungani ukhetha i-FR4?
Izinhlobo ze-FR4 ezitholakala ku-Proto-Electronics

FR4 izakhiwo nezinto zokwakha

I-FR4 iyindinganiso echazwe yi-NEMA (National Electrical Manufacturers Association) ye-epoxy resin laminate eqiniswe ngengilazi.

I-FR imele “i-flame retardant” futhi ikhombisa ukuthi okokusebenza kuthobelana nezinga le-UL94V-0 lokuvutha kwempahla yepulasitiki. Ikhodi ye-94V-0 ingatholakala kuwo wonke ama-FR-4 PCB. Iqinisekisa ukungasakazeki komlilo kanye nokucisha kwawo ngokushesha lapho impahla isha.

I-glass transition (TG) ingokuhleleka kuka-115°C kuya ku-200°C kuma-High TG noma ama-HiTG kuye ngezindlela zokukhiqiza kanye nezinsalela ezisetshenzisiwe. I-FR-4 PCB ejwayelekile izoba nongqimba lwe-FR-4 oluhlanganiswe phakathi kwezingqimba ezimbili ezizacile zethusi elaminate.

I-FR-4 isebenzisa i-bromine, into ebizwa nge-halogen chemical element ekwazi ukumelana nomlilo. Ithathe indawo ye-G-10, enye inhlanganisela ebingazweli kangako, ezinhlelweni zayo eziningi.

I-FR4 inenzuzo yokuba nesilinganiso esihle sokumelana nesisindo. Ayiwamumbi amanzi, igcina amandla aphezulu emishini futhi inamandla okuvikela ukushisa ezindaweni ezomile noma ezinomswakama.

Izibonelo ze-FR-4

I-FR4 ejwayelekile: njengoba negama layo libonisa, lena i-FR-4 ejwayelekile enokumelana nokushisa kwe-oda lika-140°C kuya ku-150°C.

Inani eliphakeme kakhulu lama-FR4: lolu hlobo lwe-FR-4 lunokuguqulwa kwengilazi okuphezulu (TG) okungaba ngu-180°C.

Inani eliphakeme kakhulu lama-FR4: I-Comparative Tracking Index ingaphezu kuka-600 Volts.

I-FR4 engenakho ikhopha elaminated: ilungele amapuleti okufakelwa kanye nezisekelo zebhodi.

Kunemininingwane eyengeziwe yezimpawu zalezi zinto ezihlukile kamuva esihlokweni.

Izinto okufanele zicatshangelwe lapho ukhetha ukushuba

Ukuhambisana nezingxenye: noma i-FR-4 isetshenziselwa ukukhiqiza izinhlobo eziningi zesekethe ephrintiwe, ukujiya kwayo kunemiphumela ezinhlotsheni zengxenye esetshenzisiwe. Isibonelo, izingxenye ze-THT zihlukile kwezinye izingxenye futhi zidinga i-PCB ezacile.

Ukonga isikhala: ukonga isikhala kubalulekile lapho uklama i-PCB, ikakhulukazi yezixhumi ze-USB nezinsiza ze-Bluetooth. Amabhodi ama-thinnest asetshenziswa ekucushweni lapho ukonga isikhala kubalulekile.

Ukuklama nokuvumelana nezimo: abakhiqizi abaningi bakhetha amabhodi awugqinsi kunamancane. Ukusebenzisa i-FR-4, uma i-substrate izacile kakhulu, ingaba sengozini yokuphuka uma ubukhulu bebhodi benyuswa. Ngakolunye uhlangothi, amabhodi aminyene ayaguquguquka futhi enze kube nokwenzeka ukudala ama-V-grooves.

Indawo ezosetshenziswa kuyo i-PCB kumele icatshangelwe. Okweyunithi yokulawula ye-elekthronikhi emkhakheni wezokwelapha, ama-PCB azacile aqinisekisa ingcindezi encishisiwe. Amabhodi amancane kakhulu - futhi ngenxa yalokho aguquguqukayo kakhulu - asengozini yokushisa. Bangakwazi ukugoba futhi bathathe i-engeli engathandeki ngesikhathi sezinyathelo ze-soldering yengxenye.

Ukulawulwa kwe-impedance: ukushuba kwebhodi kusho ukushuba kwemvelo ye-dielectric, kulesi simo i-FR-4, okuyikhona okusiza ukulawula i-impedance. Lapho impedance iyisici esibalulekile, ukushuba kwebhodi kuwumgomo wokunquma okufanele ucatshangelwe.

Ukuxhumana: uhlobo lwezixhumi ezisetshenziselwa isekethe ephrintiwe futhi lunquma ubukhulu be-FR-4.

Kungani ukhetha i-FR4?

Izindleko ezithengekayo zama-FR4 ziwenza abe inketho evamile yokukhiqizwa kochungechunge oluncane lwama-PCB noma i-electronic prototyping.

Nokho, i-FR4 ayilungile kumasekhethi aphrintiwe amafrikhwensi aphezulu. Ngokufanayo, uma ufuna ukwakha ama-PCB akho abe yimikhiqizo engavumeli kalula ukwamukelwa kwezingxenye futhi ezilungele kancane ama-PCB aguquguqukayo, kufanele ukhethe enye impahla: i-polyimide/polyamide.

Izinhlobo ezahlukene ze-FR-4 ezitholakala ku-Proto-Electronics

I-FR4 ejwayelekile

Umndeni wakwaFR4 SHENGYI S1000H
Ubukhulu kusuka ku-0.2 kuya ku-3.2 mm.
Umndeni wakwa-FR4 VENTEC VT 481
Ubukhulu kusuka ku-0.2 kuya ku-3.2 mm.
FR4 SHENGYI umndeni S1000-2
Ubukhulu kusuka ku-0.6 kuye ku-3.2 mm.
Umndeni wakwa-FR4 VENTEC VT 47
Ubukhulu kusuka ku-0.6 kuye ku-3.2 mm.
FR4 SHENGYI umndeni S1600
Ubukhulu obujwayelekile buyi-1.6 mm.
FR4 VENTEC umndeni VT 42C
Ubukhulu obujwayelekile buyi-1.6 mm.
Le nto ingilazi ye-epoxy engenakho ithusi, eyenzelwe ukusetshenziswa kumapuleti okufakelwa, izifanekiso, izisekelo zebhodi, njll. Zenziwa kusetshenziswa imidwebo yemishini yohlobo lweGerber noma amafayela e-DXF.
Ubukhulu kusuka ku-0.3 kuye ku-5 mm.