Menene siffa ta rashin ƙarfi a cikin PCB?Yadda za a magance matsalar impedance?

Tare da haɓaka samfuran abokin ciniki, sannu a hankali yana haɓaka zuwa ga jagorar hankali, don haka abubuwan buƙatu don ƙarancin jirgi na PCB suna ƙara stringent, wanda kuma yana haɓaka ci gaba da girma na fasahar ƙirar impedance.
Menene siffa impedance?

1. Juriya da aka haifar ta hanyar canzawar halin yanzu a cikin abubuwan da aka gyara yana da alaƙa da ƙarfin aiki da inductance.Lokacin da watsa siginar siginar lantarki a cikin madugu, juriyar da yake karba ana kiransa impedance.

2. Resistance shine juriya da aka haifar ta hanyar kai tsaye akan abubuwan da aka gyara, wanda ke da alaƙa da ƙarfin lantarki, tsayayya, da na yanzu.

Aikace-aikacen impedance halayyar

1. Aiwatar da siginar sigina mai sauri da maɗaukakiyar mita, aikin lantarki da aka ba da shi ta hanyar da aka buga dole ne ya iya hana tunani yayin watsa siginar, kiyaye siginar daidai, rage asarar watsawa, da kuma taka rawar da ta dace.Cikakken, abin dogaro, daidai, babu damuwa, da watsa sigina mara amo.

2. Girman impedance ba za a iya fahimta kawai kamar yadda mafi girma mafi kyau ko ƙarami mafi kyau, maɓallin yana daidaitawa.

Sarrafa sigogi na halayen halayen halayen

Matsakaicin dielectric na takardar, kauri na dielectric Layer, fadin layin, kauri na jan karfe, da kauri na abin rufe fuska.

Tasiri da sarrafa abin rufe fuska na solder

1. Kauri daga cikin abin rufe fuska na solder yana da ƙananan tasiri akan impedance.Girman abin rufe fuska na solder yana ƙaruwa da 10um, kuma ƙimar impedance yana canzawa kawai 1-2 ohms.

2. A cikin ƙira, akwai babban bambanci tsakanin zaɓi na murfin kuma babu abin rufe fuska mai solder, 2-3 ohms mai ƙare guda ɗaya, da bambanci 8-10 ohms.

3. A cikin samar da allunan impedance, kauri na solder mask ana sarrafa shi kullum bisa ga bukatun samarwa.

Gwajin impedance

Babban hanyar ita ce hanyar TDR (Time Domain Reflectometry).Ka'ida ta asali ita ce kayan aikin suna fitar da siginar bugun jini, wanda aka naɗewa baya ta hanyar gwajin da'irar don auna canjin halayen haɓakar haɓakar fitarwa da nadewa baya.Bayan kwamfuta ta nazartar da siffa mai taurin kai, za a iya fitar da siffa mai siffa.

Magance matsalar rashin ƙarfi

1. Game da matakan sarrafawa na impedance, ana iya samun buƙatun kulawa ta hanyar daidaitawa a cikin samarwa.

2. Bayan lamination a cikin samarwa, an yanke katako kuma an bincika.Idan an rage kauri na matsakaici, za a iya rage girman layin don biyan bukatun;idan kauri ya yi kauri sosai, ana iya yin kauri tagulla don rage ƙimar da ba ta da ƙarfi.

3. A cikin gwaji, idan akwai bambanci da yawa tsakanin ka'idar da gaskiya, babban yiwuwar shi ne cewa akwai matsala tare da zane-zanen injiniya da zane-zanen gwaji.