1. Isakhiwo sengxenye
Isakhiwo sihambisana nezidingo ze-schematic kagesi kanye nobukhulu bezingxenye, izingxenye zihlelwe ngokulinganayo futhi zihlelwe kahle ku-PCB, futhi zingahlangabezana nezidingo zokusebenza kwemishini kanye nogesi womshini.Ukwakheka okunengqondo noma akuthinti kuphela ukusebenza nokuthembeka kwenhlangano ye-PCB nomshini, kodwa futhi kuthinta i-PCB nokucutshungulwa komhlangano wayo kanye nokugcinwa kwezinga lobunzima, ngakho-ke zama ukwenza okulandelayo uma isakhiwo:
Ukusatshalaliswa okufanayo kwezingxenye, iyunithi efanayo yezingxenye zesekethe kufanele ihlelwe ngokuqhathaniswa, ukuze kube lula ukulungisa iphutha nokugcinwa.
Izingxenye ezinoxhumano kufanele zihlelwe ngokuqhathaniswa ngokuqhathaniswa ukuze zisize ukuthuthukisa ukuminyana kwezintambo nokuqinisekisa ibanga elifushane phakathi kokuqondanisa.
Izingxenye ezizwela ukushisa, ukuhlelwa kufanele kube kude nezingxenye ezikhiqiza ukushisa okukhulu.
Izingxenye ezingase zibe nokuphazamiseka kazibuthe kwezinye kufanele zithathe izinyathelo zokuvikela noma zokuzihlukanisa.
2. Imithetho yezintambo
Izintambo zihambisana nomdwebo wohlelo lukagesi, ithebula lomqhubi kanye nesidingo sobubanzi nesikhala socingo oluphrintiwe, izintambo kufanele zihambisane nemithetho elandelayo:
Esimweni sokuhlangabezana nezidingo zokusetshenziswa, i-wiring ingaba lula uma ingenayo inkimbinkimbi ukukhetha ukuhleleka kwezindlela zokufaka izintambo zongqimba olulodwa ungqimba oluphindwe kabili → ungqimba oluningi.
Izintambo phakathi kwamapuleti amabili okuxhuma zibekwe zibe mfushane ngangokunokwenzeka, futhi amasignali azwelayo namasignali amancane ahamba kuqala ukuze kuncishiswe ukubambezeleka nokuphazamiseka kwamasignali amancane.Umugqa wokufaka wesifunda se-analog kufanele ubekwe eduze kwesihlangu socingo oluphansi;ungqimba olufanayo lwesakhiwo socingo kufanele lusatshalaliswe ngokulinganayo;indawo conductive isendlalelo ngasinye kufanele kube ukulinganisela ukuvimbela ibhodi kusuka warping.
Imigqa yesignali yokushintsha isiqondiso kufanele ihambisane ne-diagonal noma inguquko ebushelelezi, futhi irediyasi enkulu yokugoba inhle ukuze kugwenywe ukugxiliswa kwenkundla kagesi, ukuboniswa kwesignali futhi kukhiqize ukuvimba okwengeziwe.
Amasekhethi edijithali namasekhethi e-analog kuzintambo kufanele ahlukaniswe ukuze kugwenywe ukugxambukela, njengakusendlalelo esifanayo kufanele kube uhlelo oluphansi lwamasekhethi amabili kanye nezintambo zesistimu yokuphakela amandla zibekwe ngokuhlukana, imigqa yesiginali yamafrikhwensi ahlukene kufanele ibekwe. maphakathi nokuhlukaniswa kwentambo yaphansi ukuze kugwenywe i-crosstalk.Ukuze kube lula ukuhlola, umklamo kufanele usethe izindawo zokunqamuka ezidingekayo namaphuzu okuhlola.
Izingxenye zesiyingi zisekelwe phansi, ezixhunywe kugesi lapho ukuqondisa kufanele kube kufushane ngangokunokwenzeka ukuze kuncishiswe ukumelana kwangaphakathi.
Izendlalelo ezingenhla nezingezansi kufanele zibe perpendicular komunye nomunye ukuze kuncishiswe ukuhlanganisa, ungavumelanisi izendlalelo ezingenhla neziphansi noma zihambisane.
Isekhethi enesivinini esikhulu semigqa eminingi ye-I/O kanye nesikhulisi esihlukanisayo, isekethe ye-amplifier elinganiselayo ubude bomugqa we-IO kufanele bulingane ukuze kugwenywe ukubambezeleka okungadingekile noma ukushintsha kwesigaba.
Lapho i-solder pad ixhunywe endaweni enkulu yendawo yokuhambisa, ucingo oluncane oluncane ubude olungekho ngaphansi kuka-0.5mm kufanele lusetshenziselwe ukuhlukaniswa okushisayo, futhi ububanzi bocingo oluncane akufanele lube ngaphansi kuka-0.13mm.
Ucingo oluseduze nomkhawulo webhodi, ibanga elisuka emaphethelweni ebhodi eliphrintiwe kufanele libe likhulu kuno-5mm, futhi ucingo oluphansi lungasondela emaphethelweni ebhodi uma kudingeka.Uma ukucutshungulwa kwebhodi eliphrintiwe kuzofakwa kumhlahlandlela, intambo esuka onqenqemeni lwebhodi kufanele okungenani ibe nkulu kunebanga lokujula kwesikhala somhlahlandlela.
Ibhodi elinamacala amabili ezintanjeni zikagesi zomphakathi kanye nezintambo eziphansi, ngokusemandleni, libekwe eduze konqenqema lwebhodi, futhi lusatshalaliswa ebusweni bebhodi.Ibhodi le-Multilayer lingasethwa kungqimba lwangaphakathi lwesendlalelo sokuhlinzeka amandla kanye nongqimba lomhlabathi, ngokusebenzisa imbobo enensimbi kanye nomugqa wamandla kanye noxhumano lwezintambo zomhlabathi zesendlalelo ngasinye, ungqimba lwangaphakathi lwendawo enkulu yocingo nolayini wamandla, umhlabathi. Ucingo kufanele lwenziwe njengenetha, lungathuthukisa amandla okubopha phakathi kwezingqimba zebhodi le-multilayer.
3. Ububanzi bentambo
Ububanzi bocingo oluphrintiwe kunqunywa umthamo wamanje wocingo, ukuphakama okuvunyelwe kokushisa nokunamathela kwe-foil yethusi.Ububanzi bocingo lwebhodi eliphrintiwe jikelele elingekho ngaphansi kuka-0.2mm, ukujiya okungu-18μm noma ngaphezulu.I-wire mncane, kunzima kakhulu ukuyicubungula, ngakho-ke endaweni yezintambo ivumela izimo, kufanele kube ngokufanele ukukhetha ucingo olubanzi, izimiso zokuklama ezijwayelekile zimi kanje:
Imigqa yesignali kufanele ibe ugqinsi olufanayo, oluvumela ukufaniswa kwe-impedance, ububanzi bomugqa onconywayo ojwayelekile obungu-0.2 ukuya ku-0.3mm (812mil), futhi endaweni yamandla, indawo yokuqondanisa ibe mkhulu kuba ngcono ukunciphisa ukuphazamiseka.Ngezimpawu ze-high-frequency, kungcono ukuvikela umugqa ophansi, ongathuthukisa umphumela wokudlulisa.
Kumasekhethi anesivinini esikhulu kanye namasekhethi e-microwave, isici esibaluliwe sokuvimbela umugqa wokudlulisela, lapho ububanzi nokujiya kocingo kufanele kuhlangabezane nezidingo zesici sokuvimbela.
Ekwakhiweni kwesekethe yamandla aphezulu, ukuminyana kwamandla kufanele futhi kucatshangelwe ngalesi sikhathi kufanele kucatshangelwe ububanzi bomugqa, ukujiya kanye nezakhiwo zokufaka phakathi kwemigqa.Uma umqhubi wangaphakathi, ukuminyana kwamanje okuvunyelwe cishe kuyingxenye yekhondatha yangaphandle.
4. Isikhala sezintambo eziphrintiwe
Ukumelana nokufakwa phakathi kwama-conductor angaphezulu kwebhodi eliphrintiwe kunqunywa ukuhlukaniswa kwezintambo, ubude bezingxenye ezihambisanayo zezintambo eziseduze, imidiya ye-insulation (kuhlanganise ne-substrate nomoya), endaweni yezintambo ivumela izimo, kufanele zifanele ukukhulisa isikhala sezintambo. .
Isikhathi sokuthumela: Feb-18-2022