6 Umaleko FR4 ENIG Impedance Control PCB
Imiba emisela i-Impedance eLawulwayo
I-impedance yeempawu ze-PCB zihlala zimiselwa yi-inductance kunye ne-capacitance, ukuchasana kunye nokuziphatha.Ezi zinto ziyimisebenzi yobukhulu bomzimba wesekethe, ukuqina kwe-dielectric kunye nobukhulu be-dielectric ye-PCB substrate material.Ngokubanzi, i-impedance yomgca we-PCB isuka kwi-25 ukuya kwi-125Ω.Ulwakhiwo lwePCB olumisela ixabiso lothintelo lubandakanya ezi zinto zilandelayo:
Ububanzi kunye nobukhulu bemigca yemiqondiso yobhedu ephezulu nasezantsi
Ububanzi bemicwe yobhedu ephezulu nasezantsi.Uluhlu lwangaphakathi lwenkqubo yomaleko wendibano kunye nesekethe yi-0.5oz 3/3mil ukuya ku-6oz 15/12mil umgca wophawu lobhedu, kwaye umgama womgca wangaphandle uyahluka ukusuka kwi-1/3oz 3/3mil ukuya kwi-6oz 15/12mil.
Ipleyiti engundoqo okanye ubukhulu bephepha obunganyangekisiweyo kumacala omabini ocingo lobhedu
I-semi-curred sheet isetyenziswa njengomaleko wokubopha ukubamba zonke iibhodi ezingundoqo kunye kwi-PCB.Xa uyila i-PCB yokulawula i-impedance, ubukhulu bephepha le-semi-curred kumacala omabini ebhodi engundoqo kufuneka bufane.
I-Dielectric constant ye-PCB engundoqo kunye neshiti elinyangayo
Ukuba i-dielectric constant ye-core plate kunye ne-semi-cured sheet yahlukile, i-impedance iya kutshintsha.Ngoko ke, i-dielectric constant of the two kufuneka ifane.
Umboniso weZixhobo
I-Automatic Plating Line
PTH Line
LDI
