Isikhokelo kwi-FR-4 yeeSekethe eziShicilelo

Iipropati ze-FR-4 okanye i-FR4 kunye neempawu zenza ukuba zisebenziseke kakhulu ngexabiso elifikelelekayo. Yingakho ukusetyenziswa kwayo kuxhaphake kakhulu kwimveliso yesekethe eprintiweyo. Ke ngoko, kuyinto eqhelekileyo ukuba sifake inqaku malunga nalo kwibhlog yethu.

Kweli nqaku, uya kufumana ngakumbi malunga:

Iipropati kunye noncedo lweFR4
Iindidi ezahlukeneyo ze-FR-4
Izinto ekufuneka ziqwalaselwe xa ukhetha ubukhulu
Kutheni ukhetha FR4?
Iindidi zeFR4 ezifumaneka kwiProto-Electronics

Iimpawu zeFR4 kunye nemathiriyeli

I-FR4 ngumgangatho ochazwe yi-NEMA (i-National Electrical Manufacturers Association) ye-glass-reinforced epoxy resin laminate.

I-FR imele "i-flame retardant" kwaye ibonisa ukuba izinto eziphathekayo zihambelana nomgangatho we-UL94V-0 kwizinto ezivuthayo zeplastiki. Ikhowudi ye-94V-0 inokufumaneka kuzo zonke ii-PCB ze-FR-4. Iqinisekisa ukungasasazwa komlilo kunye nokucima kwayo ngokukhawuleza xa izinto zitshisa.

Ukuguqulwa kwayo kweglasi (TG) kumyalelo we-115 ° C ukuya kwi-200 ° C kwii-TG eziPhakamileyo okanye ii-HiTGs ngokuxhomekeka kwiindlela zokuvelisa kunye ne-resin ezisetyenzisiweyo. Umgangatho we-FR-4 PCB uya kuba nomaleko we-FR-4 oxutywe phakathi kwamaleko amabini amancinci obhedu olulaminethiweyo.

I-FR-4 isebenzisa i-bromine, into ebizwa ngokuba yi-halogen chemical element enokumelana nomlilo. Ithathe indawo ye-G-10, enye indibaniselwano ebinganyangeki kangako, kuninzi lwezicelo zayo.

I-FR4 inenzuzo yokuba nomlinganiselo olungileyo wokuxhathisa-ubunzima. Ayiwafunxi amanzi, igcina amandla omatshini aphezulu kwaye inamandla okukhusela kwindawo eyomileyo okanye efumileyo.

Imizekelo ye-FR-4

Umgangatho weFR4: njengoko igama layo libonisa, lo ngumgangatho we-FR-4 kunye nokumelana nokushisa komyalelo we-140 ° C ukuya kwi-150 ° C.

Phezulu TG FR4: olu hlobo lwe-FR-4 lunokutshintshwa kweglasi ephezulu (TG) malunga ne-180 ° C.

I-CTI FR4 ephezulu: Isalathiso sokuTreyitha sokuTreyitha ngaphezulu kwe-600 Volts.

FR4 ngaphandle kobhedu elaminethiweyo: ilungele iipleyiti ze-insulation kunye nezixhaso zebhodi.

Kukho iinkcukacha ezingakumbi zeempawu zezi zixhobo ezahlukeneyo kamva kwinqaku.

Izinto ekufuneka ziqwalaselwe xa ukhetha ubukhulu

Ukuhambelana namacandelo: nangona i-FR-4 isetyenziselwa ukuvelisa iindidi ezininzi zesekethe eprintiweyo, ubukhulu bayo bunemiphumo kwiintlobo zecandelo elisetyenzisiweyo. Umzekelo, amacandelo e-THT ahlukile kwamanye amacandelo kwaye afuna i-PCB ebhityileyo.

Ugcino lwesithuba: Ukugcinwa kwendawo kubalulekile xa kuyilwa i-PCB, ingakumbi kwizihlanganisi ze-USB kunye nezixhobo zeBluetooth. Iibhodi ze-thinnest zisetyenziselwa ulungelelwaniso apho ukugcinwa kwesithuba kubalulekile.

Uyilo kunye nokuguquguquka: uninzi lwabavelisi bakhetha iibhodi ezishinyeneyo kunezona zibhityileyo. Ukusebenzisa i-FR-4, ukuba i-substrate incinci kakhulu, iya kuba phantsi komngcipheko wokuphulwa ukuba imilinganiselo yebhodi yanda. Ngakolunye uhlangothi, iibhodi ezityebileyo ziguquguqukayo kwaye zenza kube lula ukwenza i-V-grooves.

Indawo ekuza kusetyenziswa kuyo iPCB mayithathelwe ingqalelo. Kwiyunithi yolawulo lwe-elektroniki kwicandelo lezonyango, iiPCB ezibhityileyo ziqinisekisa ukuncitshiswa koxinzelelo. Iibhodi ezinqabileyo kakhulu - kwaye ngoko ke ziguquguqukayo - zisengozini yokushisa. Bangakwazi ukugoba kwaye bathathe i-angle engathandekiyo ngexesha lecandelo le-soldering amanyathelo.

Ulawulo lwe-impedance: ubukhulu bebhodi buthetha ubuninzi bendalo ye-dielectric, kulo mzekelo FR-4, eyona nto iququzelela ulawulo lwe-impedance. Xa i-impedance iyinto ebalulekileyo, ubukhulu bebhodi yinqobo yokumisela ekufuneka ithathelwe ingqalelo.

Uqhagamshelwano: uhlobo lweziqhagamshelo ezisetyenziselwa isiphaluka esiprintiweyo kwakhona sinquma ubukhulu be-FR-4.

Kutheni ukhetha FR4?

Iindleko ezifikelelekayo ze-FR4s zibenza ukuba babe yindlela eqhelekileyo yokuvelisa uluhlu oluncinci lwee-PCB okanye iprototyping ye-elektroniki.

Nangona kunjalo, i-FR4 ayifanelekanga kwiisekethe eziprintiweyo eziphezulu. Ngokufanayo, ukuba ufuna ukwakha ii-PCBs zakho kwiimveliso ezingavumeli lula ukwamkelwa kwamacandelo kwaye azifanelekanga kancinane kwii-PCB eziguquguqukayo, kufuneka ukhethe enye imathiriyeli: i-polyimide/polyamide.

Iindidi ezahlukeneyo ze-FR-4 ezifumaneka kwiProto-Electronics

Umgangatho weFR4

FR4 SHENGYI usapho S1000H
Ukutyeba ukusuka kwi-0.2 ukuya kwi-3.2 mm.
FR4 VENTEC usapho VT 481
Ukutyeba ukusuka kwi-0.2 ukuya kwi-3.2 mm.
FR4 SHENGYI usapho S1000-2
Ukutyeba ukusuka kwi-0.6 ukuya kwi-3.2 mm.
FR4 VENTEC usapho VT 47
Ukutyeba ukusuka kwi-0.6 ukuya kwi-3.2 mm.
FR4 SHENGYI usapho S1600
Ubukhulu obuqhelekileyo 1.6 mm.
FR4 VENTEC usapho VT 42C
Ubukhulu obuqhelekileyo 1.6 mm.
Esi sixhobo yiglasi ye-epoxy engenakho ubhedu, eyenzelwe ukusetyenziswa kwiipleyiti ze-insulation, i-templates, izixhaso zebhodi, njl. Ziye zenziwe ngokusebenzisa i-Gerber type mechanical drawings okanye iifayile zeDXF.
Ukutyeba ukusuka kwi-0.3 ukuya kwi-5 mm.