Fr-4 Inofanirwa Kuzivikanwa Usati PCB Bhodhi

Fr4 Inofanirwa Kuzivikanwa Pamberi PCB Bhodhi

Kana isu tichiisa oda muPCB Board Fekitori, pane kazhinji in the Fr-4 bhodhi remhando yekusarudza kubva. Parizvino, kune matatu marudzi emhando dzebhodhi: Fr-4, Aluminium board, uye thermoelectricapar kuparadzaniswa kwekabhodhi yeCopper.

1. Fr-4, yakanyorwawo seFr4, izita uye giredhi rakajairika

Substric Subass

Fr mune iyo Nema Classification Standard inomiririrwa "zvinoreva kuti zvinyorwa zvekuzvisiyanisa kubva kune zvimwe zvigadzirwa zveimwe danho, 4 zvinoreva kuti resin ndeye ipo Murazvo unodzoreredza mamakisi eFR-1, Fr-2, uye Fr-3 are Ul 94v-1, uye iyo nzvimbo yekuisimbisa inoshandiswa zvakare yakasiyana.

2. Performance Index yeFR-4
The Fr-4 Substrate is a epoxy resin system, saka kwenguva yakareba, tg kukosha ndiyo indekisi yakajairika inoshandiswa kuparadzanisa Fr-4 Substrates, uye zvakare chimwe chezvakanyanya kukosha performance muIPC-4301 squification.

Girazi transition tembiricha tg

Iko kukoshesa kweTG yeiyo resin zvinoreva kune tembiricha transurity nzvimbo iyo iyo shanduko kubva kune yakaomeswa kubva kune yakaomarara kana "girazi" nyika kune yakasarudzika kana yakanyorovesa mamiriro. Iyi shanduko yeTropednamic inogara ichidzoserwa kwenguva yakareba sekusiya isingaori. Ndokunge, kana chinyorwa chakatsikwa kubva kune yakajairwa tembiricha kune tembiricha pamusoro pe tg kukosha kweTG, uye wobva washandurwa pazasi peTG kukosha, inogona kuchinja kudzokera kuimba yakaoma neiyo zvinhu zvakafanana. Nekudaro, kana zvinyorwa zvacho zvichinge zvapazadzwa nekudziya zvakanaka pamusoro payo tg, isingachinjiki chikamu shanduko inogona kuitika. Mhedzisiro yeiyi tembiricha ine zvakawanda zvekuita nerudzi rwezvinhu uye zvakare nekuora kwemhedzisiro yeiyo resin.

Kazhinji, yakakwira tg yeiyo substrate, yakakwira kuvimbika kwezvinhu izvi. Kana iyo yekutengesa-yemahara yekutengesa maitiro inogamuchirwa, iyo yekushambadzira yekushongedza tembiricha (TD) yezvinyorwa zvibodzwa zvinodawo kutariswa.

Zvimwe zvakakosha zvekuita zviratidzo zvinosanganisira kuenderana nekuwedzera kwekuwedzera (CTE) [1]

3. Kusiyana-siyana kweFr-4

Girazi Fiber Cloth rinoshandiswa seinosimbisa zvinhu, iyo resin system ndeye epoxy resin uye iyo base zvinhu nemurazvo unodzoreredza chiyero che UL 94V-0 is fr-4. Pane chero chirevo chakasiyana pakati pekirasi yakakura kudaro yezvinhu?

Govana maererano neTG kukosha


Musiyano wakanyanya kujeka pakati peFr-4 Zvishandiso ndiyo tg kukosha. Maererano neTG tembiricha, mashiti esh-mana anowanzo kukamurwa kuderera tg, yepakati tg uye yakakwira tg mashitsi.

Mune indasitiri, fr-4 ine tg yeanenge 135 ° C inowanzo zivikanwa seyakaderera tg sheet; Fr-4 ne tg yeanenge 150 ° C isto risi reTG TG; uye Fr-4 ne tg yeanenge 170 ° C inogadziriswa seyakawedzera tg sheet.

Kana paine zvakawanda zvakadzvanya nguva panguva yekugadzirisa PCB, kana huwandu hwePCB matanho akakura (anopfuura gumi nematanhatu), kana tembiricha yakakwirira (≥230 ° (≥230 ° C), kana tembiricha yekushandira yakakwira (anopfuura zana ° C) , kana iyo yekukwira iyo kudzora kushushikana kwakakura (sekuti sensitenge aze), inofanira kusarudza yakakwira tg ndiro.

Govana maererano nekurasikirwa.

Fr-4 inogona kukamurwa kuva:

Yakajairika kurasikirwa ndiro (df≥0.02)
Edium Kurasikirwa Ndiro (0.01 <df <0.02)
Low Less Less Plate (0.005 <DF <0.01)
Ultra-yakaderera kurasikirwa pepa (df <0.005)

Chero kubvunza chero, ndapota taura nekutengesa@honyplasost.com