Kungani amabhodi e-PCB enza i-impedance?
I-Impedance - eqinisweni, ibhekisela ekuphikiseni kanye nemingcele ye-pair of reactance, ngoba umugqa we-PCB ukucabangela ukufakwa kwe-plug-in yezingxenye ze-elekthronikhi, i-plug-in ngemva kokucatshangelwa kokusebenza nokusebenza kokudluliselwa kwesignali nezinye izinkinga, akunakugwenywa ukuthi ukwehla kwe-impedance kungcono, ukumelana kufanele kube ngaphansi kunesentimitha yesikwele ngasinye 1 × 10 kokususa izikhathi ezingu-6 ezilandelayo.
Ngakolunye uhlangothi, ibhodi le-PCB ohlelweni lokukhiqiza lokudlula ukucwila kwethusi, i-tin plating (noma i-chemical plating, noma i-thermal spray tin), izixhumi nezinye izingxenye zesixhumanisi nezinto ezisetshenziswa kulesi sixhumanisi kumele ziqinisekise ukuthi phansi. ye-resistivity, ukuze kuqinisekiswe ukuthi ukuvinjelwa okuphelele kwebhodi le-PCB kuphansi ukuze kuhambisane nezidingo zekhwalithi yomkhiqizo, noma-ke ibhodi lesifunda ngeke lisebenze ngokujwayelekile.
Imboni ye-elekthronikhi iyonke, ifektri yebhodi lesifunda le-PCB kusixhumanisi se-tin-plating yiyona eyinkinga kakhulu, umphumela wokuvinjelwa kwezixhumanisi eziyinhloko, ngoba isixhumanisi sebhodi lesifunda se-tin-plating, manje sesithandwa ukufeza inhloso i-tin-plating kusetshenziswa ubuchwepheshe bekhemikhali be-tin-plating, kodwa thina njengemboni yezogesi njengabamukeli bemboni ye-elekthronikhi, noma imboni yokukhiqiza ibhodi ye-PCB nokucubungula iminyaka engaphezu kwe-10 yokuxhumana nokubuka.
Embonini yezogesi, ngokomugqa wophenyo, ubuthakathaka obubulalayo kakhulu bongqimba lwethayela lamakhemikhali kulula ukubushintsha umbala (kokubili i-oxidation elula noma i-deliquescence), ukubhula okungekuhle kuholela ekubeni kube nzima ukushisela, ukuvimbela kuphezulu kakhulu okuholela ekuziphatheni okubi noma lonke ukungasebenzi kahle kwebhodi, ukukhulisa amadevu ethayela kalula kuholela ku-PCB line short-circuiting noma ngisho nokushiswa noma imicimbi yomlilo.
Umugqa oyinhloko webhodi lesifunda le-PCB uyicwecwe lethusi, ucwecwe lwethusi emalungeni e-solder ungqimba lukathayela, futhi izingxenye ze-elekthronikhi zidlula unamathisele we-solder (noma umugqa we-solder) oshiselwe phezu kongqimba lwethini, empeleni, unamathisele we-solder isimo sokuncibilika sokudayiswa ezingxenyeni ze-elekthronikhi kanye nongqimba lwe-tin Plating phakathi kwensimbi kathayela (okungukuthi, ama-monomers ensimbi eqhubayo), ngakho-ke kungaba lula futhi kufingqiwe ukuveza ukuthi izakhi ze-elekthronikhi zigcwele ungqimba lwe-tin Plating phansi kwe-PCB. ibhodi bese kuba ucwecwe yethusi Connection.
Ngakho-ke ukuhlanzeka kongqimba lwe-tin plating kanye ne-impedance yalo kuyisihluthulelo;kodwa hhayi ngaphambi kokuxhumeka kwezingxenye ze-elekthronikhi, ngokuqondile nethuluzi lokubona i-impedance, empeleni, i-instrument probe (noma eyaziwa ngokuthi ipeni lemitha) iphetha futhi ngokuthintana kokuqala nebhodi lebhodi lesifunda ngaphansi kwendawo. yefoyili yethusi yongqimba lwe-tin plating bese kuba nephansi le-PCB ibhodi le-copper foil ukuxhuma yamanje.Ngakho enamathela tin kuyisihluthulelo, kuyisihluthulelo kuthinta impedance futhi kuthinte ukusebenza ibhodi wesifunda ibhodi, kodwa futhi kulula ukunganakwa key.
Ngokungeziwe kuma-monomers ensimbi, izinhlanganisela zawo zingabaqhubi abampofu bakagesi noma ngisho nokungaqhubeki (okubuye kubangelwa ukuba khona komthamo wokusabalalisa kulayini noma umthamo wokudlulisa ukhiye), ngakho-ke ungqimba lwe-tin Plating phambi kwalokhu. uhlobo lwezinhlanganisela ezibonakala ziguquguqukayo nezingezona u-conductive noma izingxube zethini, ukumelana naso esenziwe ngomumo noma i-oxidation yesikhathi esizayo, ukusabela kwe-electrolytic komswakama kanye nokumelana kwawo okuhambisanayo kanye ne-impedance kuphezulu kakhulu (okwanele ukuthi kuthinte izinga noma ukudluliswa kwesignali yamasekhethi edijithali. ).ileveli noma ukudluliswa kwesignali kumasekhethi edijithali), futhi isici sawo sokuvimbela akuhambisani.Lokhu kuthinta ukusebenza kwebhodi lesifunda kanye nomshini uwonke.
Ngokwesimo samanje sokukhiqiza komphakathi, ibhodi le-pcb elingaphansi kwezinto zokucwenga kanye nokusebenza kuzothinta izici zebhodi le-PCB le-impedance yesizathu esibaluleke kakhulu kanye nesizathu esiqondile, kodwa futhi ngenxa yokuguga nokuguga. kanye ne-electrolysis yomswakama wokuhlukahluka kwe-impedance ukuze i-impedance yayo ikhiqize ukukhathazeka ngomthelela womthelela ofihliwe futhi oguquguqukayo, futhi isizathu esiyinhloko sokucasha kwawo silele kulokhu okulandelayo: eyokuqala ayikwazi ukubonwa iso elinqunu, kanti eyesibili ayikwazi ukulinganisa njalo, ngoba inesikhathi nomswakama ozungezile kanye noshintsho lwe-impedance yebhodi nokusebenza komshini.Ngoba inokuhlukahluka ngokushintsha kwesikhathi kanye nomswakama wemvelo, ngakho-ke kulula ukungazinaki.
Amaqiniso asheshayo nge-NeoDen
① Isungulwe ngo-2010, abasebenzi abangu-200+, 8000+ Sq.m.ifektri
② Imikhiqizo ye-NeoDen: I-Smart series PNP machine, NeoDen K1830, NeoDen4, NeoDen3V, NeoDen7, NeoDen6, TM220A, TM240A, TM245P, reflow oven IN6, IN12, Solder unama iphrinta FP26406, 3 PM
③ Amakhasimende angu-10000+ aphumelele emhlabeni wonke
④ 30+ ama-Global Agents ambozwe e-Asia, Europe, America, Oceania nase-Afrika
⑤ Isikhungo se-R&D: Iminyango emi-3 ye-R&D enonjiniyela abangu-25+ be-R&D abangochwepheshe
⑥ Ifakwe ohlwini lwe-CE futhi yathola amalungelo obunikazi angama-50+
⑦ 30+ onjiniyela bokulawula ikhwalithi nokusekelwa kobuchwepheshe, ukuthengiswa kwamazwe ngamazwe okuphezulu okungu-15+, ikhasimende elifika ngesikhathi liphendula phakathi kwamahora angu-8, izixazululo ezichwepheshile ezihlinzeka phakathi kwamahora angu-24
Isikhathi sokuthumela: Sep-08-2023