Ukufeza okuhleIdizayini ye-PCB, ngaphezu kokuhlelwa kwendlela ephelele, imithetho yobubanzi be-line kanye nezikhala kubalulekile. Lokho kungenxa yobubanzi obubanzi nokuhlukanisa izikhala kunquma ukusebenza nokuqina kweBhodi Yesekethe. Ngakho-ke, le ndatshana izohlinzeka ngesingeniso esinemininingwane yemithetho ejwayelekile yokwakhiwa kwe-PCB Line kanye nesikhala.
Kubalulekile ukuqaphela ukuthi izilungiselelo ezizenzakalelayo zesoftware kufanele zilungiselelwe kahle futhi inketho ye-Design Rule Check (DRC) kufanele ivunyelwe ngaphambi komzila. Kunconywa ukusebenzisa igridi engu-5mil yesifiso, futhi ubude obulinganayo be-1mil grid bungasetwa ngokususelwa esimweni.
I-PCB Line Ububanzi Imithetho:
1.Routing kufanele aqale ahlanganeAmandla okukhiqizayefektri. Qinisekisa umenzi wemikhiqizo nekhasimende bese unquma amandla abo okukhiqiza. Uma kungekho zidingo ezithile ezihlinzekwa yikhasimende, bheka izifanekiso zokuklama kwe-Impodance for Line Judth.
2.UmlingaIzibonisi: Kususelwa kubukhulu bebhodi elinikeziwe nezidingo zesendlalelo ezivela kwikhasimende, khetha imodeli efanelekile yokuvikela. Setha ububanzi be-Line ngokusho kobubanzi obubaliwe ngaphakathi kwemodeli yokuvikela. Amanani ajwayelekile wokulimala afaka phakathi okukodwa okungu-50 okwenziwe ngo-50, okuhlukile, okungu-100ω, njll. Qaphela ukuthi ngabe i-50 ye-antenna yesikhangiso kufanele ibheke kusethenjwa ungqimba oluseduze. Nge-PCB ungqimba ye-PCB ungqimba njengereferensi ngezansi.
I-3.As ikhonjiswe kumdwebo ongezansi, ububanzi bangempela kufanele buhlangabezane nezidingo zamandla athwala njengamanje. Ngokuvamile, ngokusekelwe kokuhlangenwe nakho nokubheka ama-margins ahambisanayo, umklamo womugqa wamandla anganqunywa yilezi zinkombandlela ezilandelayo: ukukhuphuka kwezinga lokushisa kwe-10 ° C, ububanzi be-1oz Comper, ububanzi be-1oz bungabubanzi bungaphatha i-apter yamanje ye-1A; Okwe-0.5OZZ zethusi, ububanzi bama-40mil obubanzi bungaphatha i-1A yamanje ye-1A.
4. Ngezinhloso ezijwayelekile zokuklama, ububanzi bemigqa kufanele bulawulwe ngenhla kwe-4mil, engahlangana namakhono okukhiqiza iningiAbakhiqizi be-PCB. Ngemiklamo lapho ukulawulwa kwe-impedance kungadingekile (iningi lamabhodi ezingqimba ezi-2), ukuklama ububanzi bemigqa engenhla kwe-8mil kungasiza ukunciphisa izindleko zokukhiqiza ze-PCB.
5. Cabangaubukhulu bethusiukusetha ungqimba oluhambisanayo emzileni. Thatha i-2oz yethusi ngokwesibonelo, zama ukuklama ububanzi bemigqa ngaphezulu kwe-6mil. Ubukhulu bethusi, ababanzi ububanzi bentambo. Cela izidingo zokukhiqiza zefekthri ngemiklamo yokuqina kwe-Copper evamile.
I-6. Ngemiklamo ye-BGA ene-0.5mm kanye ne-0.65mm Pitches, ububanzi bemigqa engu-3.5mil bungasetshenziswa ezindaweni ezithile (ingalawulwa yimithetho yokuklama).
7. I-HDI BoardImiklamo ingasebenzisa ububanzi bemigqa ye-3mil. Ngemiklamo enobubanzi obuphansi ngaphansi kwe-3mil, kuyadingeka ukuqinisekisa amandla okukhiqiza efektri nekhasimende, njengoba abanye abakhiqizi bangakwazi kuphela abakwazi ukuqondiswa komugqa we-2mil (kungalawulwa yimithetho yokuklama). Ububanzi be-Thinner Line bukhulisa izindleko zokukhiqiza futhi unwebe umjikelezo wokukhiqiza.
8 Uma isikhala sinqunyelwe, ububanzi bentambo kufanele bulawulwe ngenhla kwe-8mil.
9. Izimpawu ze-RF kufanele ziphathwe ngemigqa emikhulu, ngokubhekisele ezingxenyeni eziseduze nokuvinjwa okulawulwa ku-50 kulo. Izimpawu ze-RF kufanele zicutshungulwe ezingxenyeni zangaphandle, zigweme izingqimba zangaphakathi futhi zinciphise ukusetshenziswa kwezinguquko ze-vias noma izinguquko. Izimpawu ze-RF kufanele zizungezwe indiza yomhlabathi, ngereferensi ungqimba mhlawumbe ukuba yi-GND yethusi.
I-PCB Wiring Line Spacering imithetho
1. I-wiring kufanele iqale ihlangabezane nomthamo wefekthri, futhi izikhala zomugqa kufanele zihlangabezane namandla okukhiqiza efektri, ngokuvamile alawulwa ngo-4 mil noma ngaphezulu. Ngemiklamo ye-BGA nge-0.5mm noma i-0.65mm Imiklamo ye-HDI ingakhetha ukuhlukaniswa komugqa kwe-3 mil. Imiklamo engezansi 3 mil kumele iqinisekise amandla okukhiqiza efektri yokukhiqiza nekhasimende. Abanye abakhiqizi banamandla okukhiqiza ama-2 mil (alawulwa ezindaweni ezithile zokuklama).
2. Ngaphambi kokuqamba umthetho wokuhlukanisa umugqa, cabanga ngemfuneko yokuqina yethusi. Okwe-1 Ounce Copper Zama ukuze ulondoloze ibanga elingu-4 mil noma ngaphezulu, kanye ne-2 yethusi yethusi, zama ukugcina ibanga lama-6 mil noma ngaphezulu.
I-3. Idizayini yebanga lababili ngababili bokuhlukanisayo kufanele isethwe ngokuya ngezidingo zokuvimbela ukuqinisekisa ukuhlukaniswa okufanele.
I-4. I-wiring kufanele igcinwe kude nohlaka lwebhodi bese izama ukuqinisekisa ukuthi uhlaka lwebhodi lungaba ne-Vais (GND) vias. Gcina ibanga phakathi kwamasiginali kanye nemiphetho yebhodi ngenhla kwama-40 mil.
I-5. Isiginali yesendlalelo samandla kufanele ibe nebanga okungenani le-10 mil kusuka kungqimba ye-GND. Ibanga phakathi kwamandla kanye nezindiza zethusi zamandla kufanele okungenani kube yi-10 mil. Kwamanye ama-ICS (afana ne-BGAS) enezikhala ezincanyana, ibanga lingashintshwa ngokufanele kubuncane bemilo eyi-6 (elawulwa ezindaweni ezithile zokuklama).
6.Izimpawu ezithandekayo ezinjengamawashi, ezehlukene, kanye nezimpawu ze-analog kufanele zibe nebanga lezindiza ezi-3 ububanzi (3W) noma zizungezwe izindiza zomhlaba (GND). Ibanga phakathi kwemigqa kufanele ligcinwe ngezikhathi ezi-3 ububanzi be-Line Ububanzi ukuze buhlise i-crosstalk. Uma ibanga phakathi kwezikhungo zemigqa emibili lingaphansi kwezikhathi ezi-3 ububanzi bentambo, ingagcina i-70% yenkambu kagesi phakathi kwemigqa ngaphandle kokuphazanyiswa.
I-7.Adjantentere ungqimba izimpawu kufanele zigweme ukuthakazelwa okufanayo. Isiqondisi somzila kufanele sakhe isakhiwo se-orthogonal ukunciphisa i-crosstalk ye-interlayer engadingekile.
8. Lapho uhamba ngokulandelana kwesendlalelo, gcina ibanga okungenani le-1mm kusuka ezimbozweni ezikhuphukayo ukuvikela amasekethe amafushane noma ukuklebhula umugqa ngenxa yokucindezela kokufaka ngenxa yokucindezela kokufaka. Indawo ezungeze izimbobo ze-screw kufanele igcinwe icacile.
9. Lapho uhlukanisa izingqimba zamandla, gwema ukwahlukana ngokweqile. Kwindiza eyodwa yamandla, zama ukungabi nezimpawu zamandla angaphezu kuka-5, mhlawumbe ngaphakathi kwamasignali wamandla ama-3, ukuqinisekisa umthamo wokuthwala wamanje futhi uvikele ubungozi bokuwela indiza ehlukanisekayo yezendlalelo eziseduze.
I-10.Prower Plane Ukwahlukana kufanele kugcinwe kuvamile ngangokunokwenzeka, ngaphandle kwezigaba ezinde noma zembumbulu, ukugwema izimo lapho ukuphela kukhulu khona mancane. Umthamo othwala njengamanje kufanele ubalwe ngokususelwa kububanzi obuncane kakhulu bendiza yethusi yamandla.
UShenzhen Angeke PCB Co, LTD
2023-9-16
Isikhathi Sokuthumela: Sep-19-2023
