Iibhodi zesekethe eziprintiweyo (PCBs) ziye zaba yinxalenye yethekhnoloji yale mihla, inika amandla zonke izixhobo zombane esixhomekeke kuzo yonke imihla. Ngelixa amacandelo kunye nemisebenzi ye-PCB isaziwa kakuhle, kukho into enye ebalulekileyo ehlala ingahoywa kodwa ibalulekile ekusebenzeni kwayo: i-substrate. Kule post yebhlog, siza kuphonononga ukuba yintoni i-substrate kwi-PCB kwaye kutheni idlala indima ebaluleke kangaka.
Yintoni i-substrate kwi-PCB?
IiSubstrates, ezibizwa ngokuba yi-PCB substrates okanye izixhobo zebhodi, zisisiseko sokunyuswa kwezixhobo ze-elektroniki zePCB. Ingumaleko ongeyena-conductive obonelela ngenkxaso yesakhiwo kwaye usebenza njengoluhlu lwe-insulation yombane phakathi kweengqimba zobhedu kwibhodi yesekethe. Eyona nto isetyenziswa kakhulu kwi-substrate imathiriyeli kwimveliso ye-PCB yifiber yeglasi eyomelezwe yi-epoxy laminate, eyaziwa ngokuba yi-FR4.
Intsingiselo yezinto ezisisiseko:
1. Inkxaso yoomatshini:
Umsebenzi oyintloko we-substrate kukubonelela ngenkxaso yomatshini kumacandelo athambileyo afakwe ebhodini. Iqinisekisa ukuzinza kunye nokuqina kwe-PCB, ukuyivumela ukuba imelane noxinzelelo lwangaphandle, ukungcangcazela kunye nokutshintsha kweqondo lokushisa. Ngaphandle kwe-substrate eyomeleleyo, imfezeko yesakhiwo se-PCB inokuthotywa, ibeka esichengeni ukusebenza kunye nobomi obude besixhobo sombane.
2. Ukugqunywa kombane:
I-substrate isebenza njenge-insulator yombane phakathi kweengqimba zobhedu eziqhubayo kwi-PCB. Banqanda iifutshane zombane kunye nokuphazamiseka phakathi kwamacandelo ahlukeneyo kunye nemikhondo, enokubangela ukungasebenzi okanye umonakalo. Ukongezelela, iimpawu ze-dielectric ze-substrate zinceda ukugcina ingqibelelo kunye nomgangatho weempawu zombane ezihamba ngaphakathi kwebhodi.
3. Ukutshatyalaliswa kobushushu:
Amacandelo e-elektroniki avelisa ubushushu ngexesha lokusebenza. I-Substrates idlala indima ebalulekileyo ekukhupheni ubushushu kude nezinto ukuze zigcinwe zikwimeko efanelekileyo yokusebenza. Izinto ezithile ze-substrate, ezifana nee-PCB zentsimbi ezingundoqo okanye ii-ceramics, ziye zaphucula ukuhanjiswa kwe-thermal, zivumela ukuhanjiswa kobushushu okusebenzayo kunye nokunciphisa umngcipheko wokufudumeza.
4. Umqondiso wemfezeko:
Izinto eziphathekayo ze-substrate zichaphazela kakhulu ingqibelelo yomqondiso we-PCB. Ngokomzekelo, ulawulo lwe-impedance luqinisekisa ukuhamba okuhambelanayo kweempawu ze-high-frequency ngaphandle kokunciphisa. I-dielectric engaguqukiyo kunye nelahleko ye-tangent ye-substrate material ichaphazela i-impedance yeempawu kunye nokusebenza komgca wokuhambisa, ekugqibeleni ukugqiba ukusebenza ngokubanzi kunye nokuthembeka kwe-PCB.
Nangona i-substrate ayinakuhlala ibonakala kakhulu, idlala indima ebalulekileyo ekusebenzeni, ukuqina kunye nokuthembeka kwebhodi yesekethe eprintiweyo. Ukubaluleka kwe-substrate akunakugxininiswa ngokugqithisileyo, ekuboneleleni ngenkxaso yomatshini kunye nokuhlukaniswa kombane ukuququzelela ukutshatyalaliswa kobushushu kunye nokugcina ingqibelelo yesignali. Ukuqonda ukubaluleka kokukhetha imathiriyeli ye-substrate echanekileyo kunye neempawu zayo kubalulekile kubayili be-PCB, abavelisi kunye nabathanda izinto zombane. Ngokuqonda indima ye-substrates, sinokuqinisekisa uphuhliso oluyimpumelelo kunye nokusebenza kwezixhobo zombane eziphucukileyo nezisebenzayo kwixesha elizayo.
Ixesha lokuposa: Jul-26-2023