Izindandatho Ezihlanganisiwe ze-PCB: Iziqondiso Zokuklama

Amasongo e-annular e-PCB ayizindawo zethusi ezihlala zizungeze imigodi ebholiwe. Abalulekile emigodini embozwe nge-plated-through, ama-via, kanye nama-component lead ngoba ahlinzeka ngendawo yokuxhuma kagesi futhi abekezelela ukuhlukahluka okuvamile kokukhiqiza ekubholeni nasekubhaliseni.

Umklamo wendandatho ehlanganisiwe kufanele usekelwe emgodini oqediwe, i-geometry yephedi, ukubhaliswa kwesendlalelo, kanye nekhono lokukhiqiza elivunyelwene ngalo msebenzi.

Okuqukethwe

• Iyini indandatho ye-PCB Annular?
• Indlela Yokubala Indandatho Ehlanganisiwe
• Kungani Izindandatho Ezihlanganisiwe Zibalulekile
• Izinkinga Ezivamile Zendandatho Ehlanganisiwe
• Ukubekezelelana kwe-IPC kanye Nokukhiqiza
• I-Vias kanye ne-Component Holes
• Ama-Teardrop Pads kanye nama-Annular Rings
• Ukuhlolwa kwe-DFM kwama-Annular Rings
• Ukuhlolwa Nokuhlolwa
• Isibuyekezo Somklamo Wendandatho Ehlanganisiwe Nge-Highleap

Iyini indandatho ye-PCB Annular?

Ngomgodi ogqitshwe nge-plated, indandatho ye-annular iyizwe lethusi eliyi-radial elizungeze umgodi oqediwe. Isekela ukuqhubeka kwe-plate futhi inikeza indawo ethengiswayo noma exhumekayo. Ezingqimbeni zangaphakathi, ukubanjwa okwanele kuyadingeka futhi ukuze kugcinwe uxhumano oluthembekile lwe-barrel ngemva kokubhoboza.

Annular-ring acceptance is tied to drilling and registration control, the specified hole geometry and the approved fabrication tolerance. Evaluate these dimensions together rather than using pad diameter as the only measure of manufacturing margin.

Indandatho edingekayo iyahluka ngokwesigaba sebhodi, uhlobo lwesendlalelo, ubuningi besici, nokuthi imbobo iyi-via, i-component lead, isici samathuluzi, noma isakhiwo esikhethekile.

Indlela Yokubala Indandatho Ehlanganisiwe

Isibalo esilula esijwayelekile yindandatho ejikelezayo = (ububanzi bephedi - ububanzi bembobo eqediwe) / 2. Inani lomklamo kumele futhi livumele ukuzulazula kokubhoboza, ukubekezelela ukubhaliswa, ukubekwa kweplati, kanye nanoma yisiphi isidingo sokwamukelwa kwamakhasimende.

Sebenzisa imbobo eqediwe ekubaleni uma lokho kuyinani lokudweba elilawulwayo. Qinisekisa ukuthi umenzi udinga usayizi omkhulu wokubhoboza ukuze afinyelele lowo mphumela oqediwe ngemva kokufaka iplati.

Kungani Izindandatho Ezihlanganisiwe Zibalulekile

Indandatho encane kakhulu yandisa ingozi yokuqhekeka, ukuncipha kokubanjwa kweplati, amajoyinti e-solder abuthakathaka, kanye nokulahlekelwa yisivuno. Umthelela ungaba mkhulu emabhodini aminyene anezingqimba eziningi lapho ukubekezelelana kokubhaliswa kwezingqimba zangaphakathi kudla ingxenye enkulu yomhlaba otholakalayo.

Ukukhetha i-pad enkulu kancane lapho umzila uvumela khona kungathuthukisa i-margin yokwenziwa futhi kunciphise ingozi engadingekile.

Izinkinga Ezivamile Zendandatho Ehlanganisiwe

Izinkinga ezivamile zifaka phakathi ukubhaliswa okungalungile kokubhoboza kuya kuphedi, ukutholakala okunganele kwengqimba yangaphakathi, amaphedi ancishiswe yi-routing noma i-thermal relief geometry, kanye nosayizi womhlaba okopishwe kusukela kusethi yomthetho wokuklama ongahambisani. Umthetho we-CAD obizwa ngokuthi ulungile ungase ungafaneleki ekilasini langempela le-stack-up nebhodi.

Buyekeza izindawo ezihlukile njengezixhumi, izimbobo zokucindezela, izindawo zethusi ezisindayo, kanye nezindawo zokuqhuma kwephimbo elincane ngokwahlukana.

Ukubekezelelana kwe-IPC kanye Nokukhiqiza

Imibhalo ye-IPC kanye nemininingwane yamakhasimende ichaza imiqondo yokwamukelwa, kodwa isigaba esiqondiwe kanye nezidingo zenkontileka kumele zisungulwe kumkhiqizo ngamunye. Amandla okukhiqiza, usayizi wokubhoboza, ukujiya kwebhodi, inani lezingqimba, kanye nokubhaliswa konke kuthinta imfuneko yomhlaba engokoqobo.

Sebenzisa imithetho yokuklama yomkhiqizi ngenqubo ehlosiwe bese uyiphatha njengengxenye yephakheji yokukhiqiza ekhishwe.

I-Vias kanye ne-Component Holes

Ama-Vias angasebenzisa ama-pad amancane ukuze kulondolozwe ubuningi bomzila, kuyilapho imigodi yezingxenye ingadinga izindawo ezinkulu zokufaka i-solder kanye namandla omshini. Ukuxhumeka okunamandla aphezulu noma okulayishwe ngomshini kudinga ukucatshangelwa okukhethekile ngosayizi we-pad, usayizi wembobo, i-plating, kanye nokukhululeka kokucindezeleka.

Ungasebenzisi inani elilodwa lendandatho ehlanganisiwe ngokungacabangi kuzo zonke izinhlobo zembobo.

Ama-Teardrop Pads kanye nama-Annular Rings

Amaconsi ezinyembezi akhulisa kahle ukuxhumana phakathi kwe-trace ne-pad. Angathuthukisa ukugcinwa kwethusi eduze komgodi obhoboziwe futhi engeze umkhawulo ezindaweni ezikhethiwe, kodwa awathathi indawo yendandatho ye-annular enobukhulu obufanele noma ukubekezelelana okufanele kokubhoboza.

Zisebenzise lapho zifanelana khona nesu lomzila kanye nokukhiqiza, bese uqinisekisa ukuthi i-geometry ephumayo ihlanzekile futhi ayidali ukwephulwa kwesikhala.

Ukuhlolwa kwe-DFM kwama-Annular Rings

Ukubuyekezwa kwe-DFM kufanele kuhlole osayizi bemigodi eqediwe, izitaki zamaphedi, amafayela okubhoboza, ukubhaliswa kwezingqimba, okuhlukile kwendandatho ye-annular, kanye nokususwa kwazo zonke izinhlobo zemigodi. Ukubuyekezwa kubaluleke kakhulu ngemva kokushintsha umtapo wolwazi wezinyawo, ukubuyekezwa kwezitaki, noma ukubuyekezwa kwephaneli.

Ukulungisa ama-marginal pads ngaphambi kokusebenzisa amathuluzi kugwema ukulungiswa kabusha okubizayo futhi kungathuthukisa isivuno sokuqala.

Ukuhlolwa Nokuhlolwa

Ukuhlolwa kokwenziwa kungafaka ukuhlolwa okuzenzakalelayo kokukhanya, ukuhlaziywa kwe-X-ray noma kwe-microsection lapho kufaneleka khona, kanye nokuhlolwa kukagesi kokuqhubeka nokuhlukaniswa. Le ndlela kufanele ikhethwe ezindinganisweni zobungozi nokwamukelwa kunokuba isetshenziswe esikhundleni semithetho yokuklama umsindo.

Bhala phansi noma yiziphi izimbobo ezibalulekile noma amakhuphoni adinga ukuqinisekiswa okwengeziwe.

Isibuyekezo Somklamo Wendandatho Ehlanganisiwe Nge-Highleap

I-Highleap Electronics ingabuyekeza imithetho yendandatho ejikelezayo, idatha yokubhoboza, ukuhlanganiswa, kanye nezidingo zemigodi ekhethekile ngaphambi kokwenziwa. Ulwazi olucacile mayelana nesigaba somkhiqizo nezici ezibalulekile kusiza ukugxila ekubuyekezweni ezingozini zangempela zokukhiqiza.

Ukuze uthole isibuyekezo sokwenziwa, cela ikhotheshini ye-PCB enamafayela e-Gerber, amafayela okubhoboza, imidwebo, kanye namanothi okwenziwa.