Daim ntawv qhia rau FR-4 rau cov ntawv luam tawm Circuits

FR-4 lossis FR4 cov khoom thiab cov yam ntxwv ua rau nws muaj ntau yam ntawm tus nqi pheej yig. Qhov no yog vim li cas nws thiaj li siv dav hauv kev luam tawm Circuit Court. Yog li ntawd, nws yog ib qho uas peb suav nrog ib tsab xov xwm hais txog nws ntawm peb qhov blog.

Hauv tsab xov xwm no, koj yuav pom ntau ntxiv txog:

Cov khoom thiab cov txiaj ntsig ntawm FR4
Qhov sib txawv ntawm FR-4
Yam yuav tsum tau xav txog thaum xaiv lub thickness
Vim li cas thiaj xaiv FR4?
Hom FR4 muaj los ntawm Proto-Electronics

FR4 khoom thiab cov ntaub ntawv

FR4 yog tus qauv txhais los ntawm NEMA (National Electrical Manufacturers Association) rau iav-reinforced epoxy resin laminate.

FR stands rau " nplaim taws retardant" thiab qhia tias cov khoom ua raws li UL94V-0 tus qauv ntawm cov khoom yas inflammability. Tus lej 94V-0 tuaj yeem pom ntawm txhua qhov FR-4 PCBs. Nws lav qhov tsis muaj hluav taws xob tawm thiab nws ceev ceev thaum cov khoom kub hnyiab.

Nws txoj kev hloov pauv iav (TG) yog ntawm qhov kev txiav txim ntawm 115 ° C rau 200 ° C rau High TGs lossis HiTGs nyob ntawm txoj kev tsim khoom thiab cov resins siv. Tus qauv FR-4 PCB yuav muaj ib txheej ntawm FR-4 sandwiched ntawm ob txheej nyias ntawm laminated tooj liab.

FR-4 siv bromine, lub npe hu ua halogen tshuaj lom neeg uas tiv taus hluav taws. Nws hloov G-10, lwm qhov sib xyaw uas tsis tshua muaj resistant, nyob rau hauv feem ntau ntawm nws daim ntawv thov.

FR4 muaj qhov zoo ntawm qhov muaj qhov zoo-qhov hnyav piv. Nws tsis nqus dej, ua kom muaj zog txhua yam thiab muaj peev xwm insulating zoo hauv qhov chaw qhuav lossis ntub dej.

Piv txwv ntawm FR-4

Txheem FR4: Raws li nws lub npe qhia, qhov no yog tus qauv FR-4 nrog kub tsis kam ntawm qhov kev txiav txim ntawm 140 ° C txog 150 ° C.

High TG FR4: hom FR-4 no muaj ntau dua iav hloov (TG) ntawm ib ncig ntawm 180 ° C.

High CTI FR4: Sib piv Kev Ntsuas Qhov Ntsuas siab tshaj 600 Volts.

FR4 tsis muaj laminated tooj liab: zoo tagnrho rau rwb thaiv tsev daim hlau thiab board txhawb.

Muaj cov ntsiab lus ntxiv ntawm cov yam ntxwv ntawm cov khoom sib txawv no tom qab hauv kab lus.

Yam yuav tsum tau xav txog thaum xaiv lub thickness

Compatibility nrog cov khoom: Txawm hais tias FR-4 yog siv los tsim ntau hom kev luam tawm Circuit Court, nws cov tuab muaj qhov cuam tshuam rau cov hom khoom siv. Piv txwv li, THT cov khoom sib txawv ntawm lwm cov khoom thiab xav tau ib lub PCB nyias.

Chaw txuag: qhov chaw txuag yog qhov tseem ceeb thaum tsim PCB, tshwj xeeb tshaj yog rau USB connectors thiab Bluetooth accessories. Lub thinnest boards yog siv nyob rau hauv configurations nyob rau hauv uas qhov chaw txuag yog tseem ceeb heev.

Tsim thiab yoog raws: Feem ntau cov tuam ntxhab nyiam cov ntawv tuab tuab rau nyias. Siv FR-4, yog tias lub substrate nyias dhau lawm, nws yuav muaj kev pheej hmoo ntawm kev tawg yog tias lub rooj tsavxwm qhov ntev tau nce. Ntawm qhov tod tes, cov boards tuab yog hloov tau thiab ua rau nws muaj peev xwm tsim V-grooves.

Ib puag ncig PCB yuav siv tau yuav tsum tau txiav txim siab. Rau chav tswj hluav taws xob hauv kev kho mob, nyias PCBs lav txo kev ntxhov siab. Cov laug cam uas nyias dhau - thiab yog li hloov tau yooj yim - yog qhov yooj yim rau cua sov. Lawv tuaj yeem khoov thiab ua rau lub kaum sab xis tsis xav tau thaum lub sij hawm cov kauj ruam soldering.

Impedance tswj: lub rooj tsavxwm thickness implies lub dielectric ib puag ncig thickness, nyob rau hauv cov ntaub ntawv no FR-4, uas yog dab tsi pab txhawb impedance tswj. Thaum impedance yog qhov tseem ceeb, lub rooj tsavxwm thickness yog qhov kev txiav txim siab yuav tsum tau coj mus rau hauv tus account.

Kev sib txuas: hom connectors siv rau ib tug luam Circuit Court kuj txiav txim siab FR-4 thickness.

Vim li cas thiaj xaiv FR4?

Tus nqi pheej yig ntawm FR4s ua rau lawv tus qauv kev xaiv rau kev tsim cov khoom me me ntawm PCBs lossis rau kev tsim hluav taws xob.

Txawm li cas los xij, FR4 tsis yog qhov zoo tagnrho rau cov ntawv luam tawm ntau zaus. Ib yam li ntawd, yog tias koj xav tsim koj cov PCBs rau hauv cov khoom uas tsis yooj yim tso cai rau cov khoom siv thiab cov khoom siv me me rau cov PCB hloov tau yooj yim, koj yuav tsum nyiam lwm cov khoom siv: polyimide / polyamide.

Qhov sib txawv ntawm FR-4 muaj los ntawm Proto-Electronics

Txheem FR4

FR4 SHENGYI tsev neeg S1000H
Thickness ntawm 0.2 mus rau 3.2 hli.
FR4 VENTEC tsev neeg VT 481
Thickness ntawm 0.2 mus rau 3.2 hli.
FR4 SHENGYI tsev neeg S1000-2
Thickness ntawm 0.6 mus rau 3.2 hli.
FR4 VENTEC tsev neeg VT 47
Thickness ntawm 0.6 mus rau 3.2 hli.
FR4 SHENGYI tsev neeg S1600
Standard thickness 1.6 hli.
FR4 VENTEC tsev neeg VT 42C
Standard thickness 1.6 hli.
Cov khoom siv no yog cov iav epoxy uas tsis muaj tooj liab, tsim los siv rau hauv cov ntaub ntawv rwb thaiv tsev, cov qauv, kev txhawb nqa lub rooj tsavxwm, thiab lwm yam. Lawv yog tsim los siv Gerber hom mechanical drawings lossis DXF cov ntaub ntawv.
Thickness ntawm 0.3 mus rau 5 mm.