Kaddarorin FR-4 ko FR4 da halayensa sun sa ya zama mai iyawa a farashi mai araha. Wannan shine dalilin da ya sa amfani da shi ya yadu sosai wajen samar da da'ira. Saboda haka, al'ada ne mu haɗa da labarin game da shi a kan shafinmu.
A cikin wannan labarin, za ku sami ƙarin bayani game da:
- Kaddarorin da fa'idodin FR4
- Daban-daban na FR-4
- Abubuwan da za a yi la'akari lokacin zabar kauri
- Me yasa zabar FR4?
- Nau'in FR4 da ake samu daga Proto-Electronics
FR4 kaddarorin da kayan
FR4 wani ma'auni ne wanda NEMA (Ƙungiyar Masu Samar da Wutar Lantarki ta Ƙasa) ta siffanta don ingantaccen ƙarfin gilashin epoxy resin laminate.
FR yana nufin "mai kare harshen wuta" kuma yana nuna cewa kayan sun dace da ma'aunin UL94V-0 akan kumburin kayan filastik. Ana iya samun lambar 94V-0 akan duk FR-4 PCBs. Yana ba da garantin rashin yaduwa na wuta da saurin kashewa lokacin da kayan ya ƙone.
Canjin gilashin sa (TG) shine tsari na 115 ° C zuwa 200 ° C don Babban TGs ko HiTGs dangane da hanyoyin masana'anta da resins da aka yi amfani da su. Ma'auni na FR-4 PCB zai sami Layer na FR-4 sandwiched tsakanin siraran siraran guda biyu na lamintaccen jan karfe.
FR-4 yana amfani da bromine, abin da ake kira halogen sinadari mai jure wuta. Ya maye gurbin G-10, wani hadaddiyar giyar da ba ta da juriya, a yawancin aikace-aikacen sa.
FR4 yana da fa'idar samun kyakkyawan juriya-nauyin rabo. Ba ya sha ruwa, yana riƙe da ƙarfin injina kuma yana da kyakkyawan ƙarfin rufewa a cikin busassun yanayi ko ɗanɗano.
Misalai na FR-4
Babban darajar FR4: kamar yadda sunansa ya nuna, wannan shine daidaitaccen FR-4 tare da juriya na zafi na tsari na 140 ° C zuwa 150 ° C.
Babban darajar FR4: irin wannan nau'in FR-4 yana da mafi girman canjin gilashin (TG) na kusa da 180 ° C.
Babban darajar CTI FR4: Fihirisar Bibiyar Kwatancen sama da Volts 600.
FR4 ba tare da laminated jan karfe ba: manufa domin rufi faranti da allon goyon baya.
Akwai ƙarin cikakkun bayanai game da halayen waɗannan kayan daban-daban daga baya a cikin labarin.
Abubuwan da za a yi la'akari lokacin zabar kauri
Dace da abubuwan da aka gyara: ko da yake ana amfani da FR-4 don samar da nau'ikan da'irar da aka buga da yawa, kaurinsa yana da sakamako akan nau'ikan abubuwan da aka yi amfani da su. Misali, abubuwan TTH sun bambanta da sauran abubuwan da aka gyara kuma suna buƙatar PCB na bakin ciki.
Ajiye sarari: ajiyar sarari yana da mahimmanci yayin zayyana PCB, musamman don masu haɗin USB da na'urorin haɗi na Bluetooth. Ana amfani da alluna mafi ƙanƙanta a cikin jeri waɗanda ceton sarari ke da mahimmanci.
Zane da sassauci: yawancin masana'antun sun fi son alluna masu kauri zuwa na bakin ciki. Yin amfani da FR-4, idan madaurin ya yi bakin ciki sosai, zai kasance cikin haɗarin karyewa idan an ƙara girman allo. A gefe guda, katako mai kauri suna da sauƙi kuma suna ba da damar ƙirƙirar V-grooves.
Dole ne a yi la'akari da yanayin da PCB za a yi amfani da shi. Don sashin sarrafa lantarki a fagen likitanci, PCBs na bakin ciki suna garantin rage damuwa. Allolin da suke da bakin ciki sosai - sabili da haka masu sassauƙa - sun fi fuskantar zafi. Za su iya tanƙwara da ɗaukar kusurwar da ba a so a lokacin matakan siyar da kayan aikin.
Sarrafa impedance: kauri na jirgi yana nuna kauri na yanayi na dielectric, a cikin wannan yanayin FR-4, wanda shine abin da ke sauƙaƙe kulawar impedance. Lokacin da impedance wani muhimmin al'amari ne, kauri na allo shine ma'auni mai ƙayyade da za a yi la'akari da shi.
Haɗin kai: nau'in haɗin haɗin da aka yi amfani da shi don da'irar bugawa kuma yana ƙayyade kauri na FR-4.
Me yasa zabar FR4?
Farashin FR4s mai araha ya sa su zama daidaitaccen zaɓi don samar da ƙananan jerin PCBs ko don ƙirar lantarki.
Koyaya, FR4 bai dace ba don manyan da'irori da aka buga. Hakazalika, idan kuna son gina PCBs ɗinku zuwa samfuran waɗanda ba sa ba da izinin ɗaukar kayan aikin cikin sauƙi kuma waɗanda ba su dace da PCB masu sassauƙa ba, ya kamata ku fi son wani abu: polyimide/polyamide.
Daban-daban na FR-4 da ake samu daga Proto-Electronics
Babban darajar FR4
- FR4 SHENGYI iyali S1000H
Kauri daga 0.2 zuwa 3.2 mm. - FR4 VENTEC iyali VT 481
Kauri daga 0.2 zuwa 3.2 mm. - FR4 SHENGYI iyali S1000-2
Kauri daga 0.6 zuwa 3.2 mm. - FR4 VENTEC iyali VT 47
Kauri daga 0.6 zuwa 3.2 mm. - FR4 SHENGYI iyali S1600
Daidaitaccen kauri 1.6 mm. - FR4 VENTEC iyali VT 42C
Daidaitaccen kauri 1.6 mm. - Wannan abu shine gilashin epoxy ba tare da jan ƙarfe ba, an tsara shi don amfani da su a cikin faranti, samfura, tallafin allo, da sauransu. Ana yin su ta amfani da zane-zane na inji na Gerber ko fayilolin DXF.
Kauri daga 0.3 zuwa 5 mm.
Farashin FR4
Babban darajar FR4
FR4 ba tare da tagulla ba