Izimbangela Eziyinhloko Ze-PCB Warpage kanye Nendlela Yokubhekana Nazo

Njengoba ukukhiqizwa nokuhlanganiswa kwe-PCB kuba nzima kakhulu, ukuqonda nokuvimbela ukugoba kwe-PCB kubalulekile ekuqinisekiseni imikhiqizo esezingeni eliphezulu nethembekile. Ukugoba kuma-PCB kungaholela ezingxenyeni ezinephutha, ukwehluleka kokugoba, ukungalungi kahle, futhi ekugcineni, izindleko ezinkulu. Njengoba ineminyaka engaphezu kwengu-20 yesipiliyoni, i-Highleap Electronic ithuthukise izixazululo eziqinisekisiwe zokunciphisa ukugoba nokuthuthukisa ikhwalithi yokukhiqiza. Lo mhlahlandlela ophelele uzokuqondisa ngezimbangela ezibalulekile zokugoba kwe-PCB, izixazululo ezisebenzayo, kanye nezinyathelo zokuvimbela, ukuqinisekisa ukuthi amaphrojekthi akho ahlala esendleleni.

Iyini i-PCB Warpage?

Ikhasi lempi le-PCB libhekisela kunoma yikuphi ukuwohloka okwenza ibhodi lesifunda eliphrintiwe lilahlekelwe isimo salo esiyisicaba esihlosiwe. I-Warping kwenzeka lapho izingcindezi zangaphakathi, ngokuvamile ezishisayo noma zemishini, zibangela ukuba i-PCB igobe, isonteke, noma ihlanekezele. Amabhodi asontekile angase abonise ukukhubazeka okubonakalayo njengokukhothama, ukugoba izinkomishi, noma ukusonteka, okungaba nomthelela omubi ekusebenzeni kwezingxenye ezifakiwe.

Inselele eyinhloko nge-warping yukuthi ingaholela ekungasebenzini kahle kwezingxenye, ukwehluleka kokuhlangana kwe-solder, kanye nokuxhumeka okungalungile kukagesi, okubangela izinkinga zokusebenza kumkhiqizo wokugcina. Ngakho-ke, ukuvimbela nokuphatha i-warpage ye-PCB kubalulekile kuma-electronics asebenza kahle kakhulu.

Kungani i-PCB Warpage Ikhathaza Abakhiqizi?

I-warpage ye-PCB ingaphezu nje kwendaba yobuhle—iyinkinga ebucayi engaholela ezinseleleni ezimbalwa ezibalulekile phakathi nokukhiqizwa, ukuhlanganiswa, nokusebenza kwezisetshenziswa zikagesi. I-Warping kuma-PCB ingase ibeke engcupheni ikhwalithi yomkhiqizo, inyuse izindleko, futhi ibambezele izikhathi zephrojekthi. Ngezansi kunezincazelo ezinemininingwane zezizathu ezibalulekile zokuthi kungani i-PCB warpage ikhathaza abakhiqizi:

1. Ukungaqondani kahle kwengxenye

Lapho i-PCB ingqubuzana, ingaholela ekungaqondisweni kahle kwezingxenye ezibekwe phezu kwayo. Lokhu kungaboni ngaso linye kuyinkinga ikakhulukazi kumadivayisi okukhweza okungaphezulu (ama-SMD) kanye nezingxenye zegridi yebhola (BGA), ezidinga ukuma okunembayo ukuze kuhlanganiswe kahle. Amabhodi asontekile angabangela ukuthi izingxenye zigudluke ezikhundleni eziqokiwe ngesikhathi senqubo yokuhlanganisa. Lokhu kushintsha kungase kubangele:

• Imijikelezo emifushane: Izingxenye ezingaqondani kahle zingase ziholele ekuxhumekeni kukagesi okungahlosiwe phakathi kwamathrekhi.
• Vula amasekhethi: Izingxenye ezingaqondani kahle kungenzeka zingaxhumani namaphedi e-PCB, okubangele ukuthi isekethe ingaphelele.
• Amalunga e-solder ampofu: Ukungaqondi kahle kungabangela amalunga angalingani noma abandayo, ajwayele ukwehluleka ngokuhamba kwesikhathi.

Lezi zinkinga azithinti kuphela ukusebenza kukagesi kwe-PCB kodwa futhi zandisa amathuba okuhluleka komkhiqizo, ikakhulukazi ezinhlelweni ezibucayi ezifana nemishini yezokwelapha, i-automotive electronics, noma ubuchwepheshe be-aerospace.

2. Soldering Ukwehluleka

I-warpage ye-PCB ingaphazamisa kakhulu inqubo yokuhlanganisa, ikakhulukazi ekufakweni kwe-reflow soldering kanye ne-wave soldering, encike ebhodini elisele liyisicaba ukuze kusatshalaliswe ukushisa okufanele. Lapho i-PCB ingqubuzana phakathi nalezi zinqubo, ingabangela ukwehluleka okuningana okuhlobene ne-solder:

• Ukushisa Okungalingani: Amabhodi asontekile angabangela izindawo ezithile ukuthi zishise ngokushesha noma kancane kunezinye. Lokhu kungalingani kwe-thermal kungaholela ekuhlanganisweni okungaphelele kwezingxenye.
• Amajoyinti e-Solder Angahambisani: Amalunga e-solder angashisi ngendlela efanayo angase ahluleke ukwakheka kahle, okuholela ekuxhumekeni okubuthakathaka noma i-voids ngaphakathi kwe-solder. Lezi zinkinga zingabangela ukungahambi kahle kukagesi kanye nokuzinza kwemishini, ekugcineni kuholele ekuhlulekeni komkhiqizo.
• Cold Solder Amalunga: Uma i-solder ingancibiliki ngokulinganayo, ingase ibangele amalunga abandayo-i-solder engakancibiliki ngokuphelele futhi ihlanganiswe ne-pad. Lawa malungu ajwayele ukuqhekeka ngaphansi kokucindezeleka futhi angaholela ekuhlulekeni okuphelele kwesifunda.

Umphumela ngokuvamile uba isidingo sokusebenza kabusha, okubambezela ukukhiqiza futhi kukhuphule izindleko zokukhiqiza.

3. Izinkinga Zomhlangano

Imigqa yokuhlanganisa ezenzakalelayo, njengemishini yokukhetha nokubeka kanye nezinqubo zobuchwepheshe bokufaka endaweni (i-SMT), zenzelwe ukusebenza nama-PCB ayisicaba. Amabhodi agobile enza kube nzima le nqubo, okuholela ekungasebenzi kahle kokusebenza okuningana:

• Amaphutha Okubeka: Imishini yokukhetha nendawo ingase ibe nobunzima bokucosha noma ukubeka ngokunembile izingxenye zamabhodi asontekile, okuholela ekubekweni kwengxenye okungalungile.
• Izinkinga Zokudla: Amabhodi asontekile angabangela izinkinga zokuqondanisa kuziphakeli ezizenzakalelayo, okuholela ekumisweni kwemishini okuvamile kanye nokuphazamiseka emugqeni wokukhiqiza.
• Ukukhipha Okuncishisiwe: Ama-PCB asontekile anganciphisa inqubo yokuhlanganisa, edinga ukungenelela okwenziwa ngesandla nokwandisa isikhathi somjikelezo webhodi ngalinye. Lokhu akunciphisi ukukhiqiza kuphela kodwa futhi kwenyusa izindleko zabasebenzi futhi kubambezela isikhathi sokuya emakethe.

Ekugcineni, ukuhlanganisa okuzenzakalelayo kungasebenzi kahle, okuholela ezikhathini zokuhola ezinde kanye nokuncipha kokukhiphayo kukonke. Lokhu kuthinta ikhono lomkhiqizi lokuhlangabezana nezinsuku zokugcina zekhasimende kanye namanani ancintisanayo.

4. Izindleko Ezanyukile

Omunye wemiphumela ebaluleke kakhulu ye-warpage ye-PCB ukukhuphuka kwezindleko ezihlobene nokubhekana nokukhubazeka okubangelwayo:

• Qalisa kabusha: Ama-PCB asontekile ngokuvamile adinga ukusetshenzwa kabusha, njengokuphinda kufakwe i-soldering noma ukulungiswa ngesandla ezingxenyeni, ukuze kulungiswe ukonakala kwe-solder. Le nqubo ithatha isikhathi, inyusa izindleko zabasebenzi, futhi ingadinga izinto zokwakha ezengeziwe.
• Ukuskrola: Uma i-warpage iphumela ekungaqondani kahle kakhulu noma kumaphutha angalungiseki, yonke i-PCB ingase idinge ukulahlwa. Lokhu kubangela ukumoshwa kwezinto ezibonakalayo kanye nokulahlekelwa kwezimali okuqondile.
• Izindleko Zokukhiqiza Eziphakeme: Ukuqinisekisa ukuthi ikhasi le-warpage liyancishiswa, abakhiqizi bangase badinge ukusebenzisa ukuhlolwa kwekhwalithi okwengeziwe, ukulawulwa kwezinga lokushisa okucophelela kakhulu phakathi nokucubungula, nezinto ezithuthuke kakhulu—okungeza kuzo zonke izindleko zokukhiqiza.

Inhlanganisela yokusebenza kabusha, ukuchithwa, kanye nezikhathi zokukhiqiza ezandisiwe kunomthelela ezindlekweni eziphakeme ngeyunithi ngayinye, ekugcineni kunciphisa amamajini enzuzo.

5. Ukwehluleka Ukusebenza

Ngisho nangemva kokuba i-PCB isidlulise inqubo yokuhlanganisa, i-warpage ingabangela ukwehluleka kokusebenza okuthinta ukuphila isikhathi eside nokuthembeka komkhiqizo:

• Ukucindezeleka Kwengxenye: Ama-PCB asontekile angaphansi kwezingxenye zengcindezi engadingekile, ikakhulukazi ezindaweni lapho ibhodi ligoba khona noma lisonteka. Ngokuhamba kwesikhathi, lokhu kucindezeleka kungabangela ukukhathala ukuphuka emalungeni e-solder kanye nokuqhekeka kwezingxenye, okuholela ekuhlulekeni ngaphambi kwesikhathi.
• Izinkinga Zokunwetshwa Kwezishisayo: Emikhiqizweni ethola amazinga okushisa aguqukayo ngesikhathi sokusebenza, i-warpage ingaba yimbi njengoba izinto ze-PCB zikhula futhi zinkontileka. Uma i-PCB ingqubuzana ngesikhathi sokusetshenziswa, ingaba kubi kakhulu ukuxhunywa kukagesi okukhona, kubangele ukuthi ibhodi lihluleke ngaphansi kwezimo zokusebenza.
• Ukwethenjelwa Okuncishisiwe: Amabhodi asontekile anethuba eliphezulu lokuhluleka ezindaweni ezinokhahlo (amazinga okushisa aphakeme, ukudlidliza, njll.), okungase kuholele ezinkingeni ezibalulekile zokulawula ikhwalithi ezimbonini ezithembele kuzinhlelo zokusebenza ezithembeke kakhulu njenge-aerospace, izimoto, noma izisetshenziswa zezokwelapha.

Ukwehluleka kokusebenza okwenzeka ngemva kokuba i-PCB ishiye umugqa wokuhlanganisa kungaholela ekukhunjuzweni komkhiqizo, okungabiza kakhulu ngokokubili imali nesithunzi.

Izimbangela Ezivamile ze-PCB Warpage

I-PCB warpage yindaba esabalele ethinta ikhwalithi nokusebenza kwezisetshenziswa zikagesi. I-Warping ingaholela ezinseleleni ezihlukahlukene zokusebenza nezokuhlanganisa, okuhlanganisa ukungahambi kahle kwengxenye, ukwehluleka kwe-soldering, kanye nezindleko zokukhiqiza ezikhulayo. Ngezansi, sizongena sijule phakathi kwezimbangela eziyinhloko ze-PCB warpage, sihlola ukuthi izakhiwo zezinto ezibonakalayo, ukucindezelwa kwe-thermal, ukucindezelwa komshini, nezici zedizayini zifaka isandla enkingeni.

1. Izinto ezibonakalayo

Izinto ezisetshenziswa ukwakha i-PCB zidlala indima ebalulekile ekuthambekeni kwayo ekubhidlikeni. I-Copper ne-fiberglass (FR-4) yizinto ezimbili eziyinhloko ezihilelekile, futhi zinama-coefficients ahlukene wokwandisa ukushisa (ama-CTE), okuyisilinganiso sokuthi kunwebeka kangakanani noma kufinyezwa yinkontileka uma kushintshwa izinga lokushisa.

• Ithusi vs. FR-4: I-Copper, esetshenziselwa ukulandelana kwe-conductive, ine-CTE ephansi kakhulu kune-FR-4, i-fiberglass substrate. Lokhu kusho ukuthi uma i-PCB ichayeke ekushiseni phakathi nezinqubo ezifana nokuphinda kufakwe i-solder, ithusi lizokhula futhi linciphe ngenani elihlukile kune-fiberglass, okubangela ukucindezeleka kwangaphakathi. Lo mehluko ekwandiseni okushisayo kungaholela ku-warpage, ikakhulukazi uma izakhiwo ezibonakalayo zingalingani kahle ekwakhiweni nasekukhiqizeni izinqubo.

Isibonelo, kuma-PCB anezingqimba eziningi, lapho kunqwabelana khona izingqimba ezimbalwa zezinto ezihlukene, ukungafani kwe-CTE phakathi kwekhopha nezinye izendlalelo kungangenisa ingcindezi phakathi kwezendlalelo, okubangele ukuthi i-PCB ikhothame noma isonteke ngokuhamba kwesikhathi.

Ukuze uvimbele i-warpage, kubalulekile ukukhetha izinto ezisetshenziswayo ezinamavelu e-CTE ahambisanayo noma ulungise ukwakheka kanye nezinqubo zokukhiqiza ukuze kuhlangatshezwane nomehluko.

2. Ukucindezeleka Okushisayo Ngesikhathi Sokukhiqiza

Ukukhiqizwa kwe-PCB kuvame ukuhilela ukuchayeka emazingeni okushisa aphezulu, futhi ukucindezeleka kokushisa ngesikhathi sezinqubo ezahlukahlukene kungabangela ukugoba. Izigaba ezimbili eziyinhloko lapho ukucindezeleka kokushisa kungeniswa khona ukugoqa kabusha kanye nokulinganisa i-hot air solder ( HASL ).

• I-Reflow Soldering: Phakathi ne-reflow soldering, i-PCB ishiswa emazingeni okushisa aphezulu ukuze incibilike unamathisele we-solder, okwenza ibhodi kanye nezingxenye zalo zande. Inkinga ivela lapho ibhodi lingapholiswanga ngokufanayo ngemva kwalokho. Uma izindawo ezithile zipholile ngokushesha kunezinye, ama-gradient ashisayo akhula, okuholela ekuphikeni. Ngisho nokuphambana okuncane ekupholiseni kungethula ukuguqulwa okubalulekile kumkhiqizo wokugcina, ikakhulukazi kumabhodi amakhulu noma imiklamo eyinkimbinkimbi.
• I-Hot Air Solder Leveling (HASL): Ku-HASL, i-PCB ishiselwa kumazinga okushisa aphakathi kuka-225°C no-265°C ukuze ifake i-solder, bese ipholiswa ngokushesha. Le nqubo yokushisisa ngokushesha kanye nokupholisa ibangela ukunwetshwa nokufinyela okuhlukile phakathi kwezingqimba nezingxenye ezihlukene, okuholela ekucindezelekeni okushisayo nokungqubuzana. Ngokufanayo ne-reflow soldering, ukungahambisani ekufakweni kokushisa phakathi nale nqubo kungaba nomthelela omkhulu ku-warpage.

Ukuze kubhekwane nokucindezeleka okushisayo, kubalulekile ukuphatha amaphrofayela okushisa namazinga okupholisa ngesikhathi sokusoda ukuze kuqinisekiswe ukusatshalaliswa kwezinga lokushisa okufanayo ku-PCB yonkana.

3. Izingcindezi Zemishini

Ukucindezeleka kwemishini ngesikhathi sokukhiqiza, ukuphatha, kanye nezigaba zokugcinwa nakho kungaholela ekungqubuzaneni. Lokhu kuyiqiniso ikakhulukazi kuma-PCB amancane noma amabhodi anezindawo ezinkulu. Kunezici ezimbalwa ezingase zethule izingcindezi zemishini:

• Ukuphatha Okungafanele: Uma ama-PCB ephathwa ngendlela engalungile ngesikhathi sokukhiqiza, njengamandla amakhulu asetshenziswa phakathi nenqubo yokuhlanganisa noma phakathi nokuhlolwa, kungabangela ukugoba noma ukuqhekeka kwebhodi. Lokhu kuyinkinga ikakhulukazi kuma-PCB anezingqimba eziningi noma aguquguqukayo, lapho ingcindezi yangaphakathi yokugoba ingabangela ukuwohloka.
• Izimo zokupakisha ngokwedlulele kanye nesitoreji: Ukugcinwa okungalungile kwama-PCB kungaholela ekuphikiseni. Uma amabhodi epakishwe ngendlela engafanele noma engasekelwe ngokwanele, isisindo samabhodi angenhla singabangela ukugoba noma ukugoqa ezingqimbeni ezingezansi, ikakhulukazi uma amabhodi amancane kakhulu. Umswakamo nawo udlala indima—umswakama omuncwa PCB impahla inganwebeka ngesikhathi sezinqubo zokushisa, iphinde ibe negalelo ekuguquguqukeni.

Ukuze ugweme ukungqubuzana kwemishini, abakhiqizi kufanele baqinisekise ukuthi izindlela zokuphatha ezifanele ziyalandelwa kuyo yonke inqubo futhi bagcine ama-PCB ezimeni ezisekelayo ezinezikhala ezanele nokulawula umswakama.

4. Izici Zokuklama

Idizayini ye-PCB ngokwayo ingaba nomthelela omkhulu ekunokwenzeka kwayo kokungqubuzana. Imiklamo ye-asymmetrical noma imiklamo ene-copper engalingani yokusabalalisa ingathula izingcindezi ezishisayo eziholela ekungqubuzaneni. Nazi ezinye izimbangela eziyinhloko ezihlobene nomklamo we-warpage:

• Ukusabalalisa Kwethusi Okungalingani: Uma uhlangothi olulodwa lwe-PCB lunethusi eliningi kakhulu kunolunye, lokhu kungalingani kuzobangela ukuthi ibhodi likhule futhi linciphe ngokulingana lapho lingaphansi kokushintsha kwezinga lokushisa. Lokhu kungase kubangele ukugoba noma ukusonteka kwe-PCB. Isibonelo, uma ungqimba olulodwa lunemikhondo yethusi eminyene (njengezindawo ezinamandla amakhulu) kuyilapho ungqimba oluphambene lunemikhondo embalwa yethusi, uhlangothi olushisayo luzothola ukunwetshwa okwengeziwe, okubangela ukuthi i-PCB ikhothame.
• Izindawo Ezinkulu Ezingaphezulu Ngaphandle Kokusekelwa: Ama-PCB anezindawo ezinkulu, ezingasekelwe zingase zisonte ngoba akukho ukuqiniswa okwanele kwesakhiwo ukulinganisa amandla okubangwa ukushisa. Uma ibhodi livezwe emazingeni okushisa aphezulu, lingase lihlehle maphakathi noma ngasemaphethelweni uma ingekho ithusi noma ukusekelwa kwezinto ezibonakalayo ukuze ligcine umumo walo.
• Complex Laminate Izakhiwo: Ama-PCB anezakhiwo eziyinkimbinkimbi ze-laminate, njengalezo ezisetshenziswa kumabhodi we-high-density interconnect (HDI) noma imiklamo yezendlalelo eziningi, athambekele kakhulu ekujikeni uma izendlalelo zingalingani ngokulinganayo. Noma yikuphi ukungqubuzana kogqinsi lwezendlalelo, inani lethusi kusendlalelo ngasinye, noma into engaphambi kokukhulelwa phakathi kwezingqimba kungabangela ukungqubuzana ngokuhamba kwesikhathi.

Ukuze unciphise ukungqubuzana ngenxa yezici zedizayini, kubalulekile ukulinganisela ukusatshalaliswa kwethusi, ukugcina izakhiwo zesendlalelo esilinganayo, futhi ulawule ngokucophelela ukubekwa kwezinto ukuze kuqinisekiswe ukunwetshwa okufanayo nokufinyela.

I-warpage ye-PCB iyinkinga eyinkimbinkimbi enezici eziningi ezinikelayo, okuhlanganisa izakhiwo zezinto ezibonakalayo, izingcindezi ezishisayo, ukucindezelwa komshini, namaphutha edizayini. Ngokuqonda lezi zimbangela, abakhiqizi bangathatha izinyathelo ezidingekayo ukuze banciphise ukungqubuzana ngokukhetha izinto ezingcono, izinqubo zokukhiqiza ezithuthukisiwe, kanye nomklamo ocabangayo. Lokhu kuzoholela emikhiqizweni yekhwalithi ephezulu, amaphutha ancishisiwe, kanye nezindleko eziphansi ezihambisana nokusebenza kabusha nokulahlwa.

5 Izinyathelo Eziwumgogodla Zokuvimbela ze-PCB Warpage kanye Nomqondo Wazo Wobuchwepheshe

1. I-Copper Balance Design: Umthetho Wegolide

Ukusatshalaliswa kwethusi okungalingani phakathi kwezingqimba ezingaphezulu neziphansi ze-PCB kungabangela ukungqubuzana ngenxa yokunwetshwa okushisayo okuhlukile. Isibonelo somhlaba wangempela salokhu i-PCB enezingqimba eziyisithupha ehlangabezane nokungqubuzana okungu-0.6mm ngenxa yokuthi ungqimba olungaphezulu lube no-70% wokumbozwa ngethusi, kuyilapho ungqimba olungezansi lube no-20%. Lokhu kungalingani kwakha ukucindezeleka okushisayo okuphawulekayo phakathi nenqubo ye-soldering.

Izindinganiso Zokuklama ze-Highleap :

• Umehluko We-Copper Density ≤ 15%: Ukuvimbela ukucindezeleka okushisayo, ukuminyana kwethusi phakathi kwezingqimba eziseduze kufanele kulinganiswe. Lokhu kuqinisekisa ukuthi izinhlangothi zombili zebhodi ziyakhula futhi zinciphe ngokufanayo lapho zivezwe ekushiseni.
• I-Symmetry ku-Layer Thickness: Umehluko wokujiya phakathi kwezingqimba kufanele ugcinwe ungaphansi kuka-5%. Noma yikuphi ukuhluka okuphawulekayo kungaholela ekucindezelekeni kwangaphakathi okuholela e-warping.
• I-Pseudo Copper Filling: Ukuze kuqhutshekwe nokulinganisela ukunwetshwa kwe-thermal, sisebenzisa ubuchwepheshe "bokugcwalisa i-pseudo copper", esiza ukusabalalisa ukushisa ngokulinganayo ku-PCB yonkana, ukuvimbela ukuwohloka okukhulu ngesikhathi senqubo yokuhlanganisa.

Ngokuqinisekisa ibhalansi yethusi, ama-PCB akuhlomele kangcono ukumelana nezingcindezi ezishisayo phakathi nenqubo yokukhiqiza.

2. Ukukhethwa Kwempahla: Isimiso Sokufanisa se-3D CTE

I-Coefficient of Thermal Expansion (CTE) idlala indima ebalulekile ekunqumeni ukuthi izinto zizosabela kanjani ekushintsheni kwezinga lokushisa. Ukungezwani ku-CTE phakathi kwezinto ezihlukene ezisetshenziswa ku-PCB kungaholela ekungqubuzaneni. I-Highleap yakhe isizindalwazi se-CTE esibanzi ukuze ikhombe ukubhanqwa kwezinto ezinciphisa ukucindezeleka okushisayo.

• I-FR4 evamile ine-CTE ye-X/Y 13-15 ppm/°C kanye ne-Z 60-70 ppm/°C, okusho ukuthi iyakhula futhi inenkontileka ngokuphawulekayo ku-axis engu-Z.
• I-Modified Epoxy Resin ine-CTE ye-Z-axis eyehliselwe ku-40 ppm/°C, esiza ukwehlisa konke ukungezwani kokunwetshwa kumabhodi ezendlalelo eziningi.

Isiphakamiso se-Highleap : Kumabhodi anezingxenye ze-BGA (Ball Grid Array) noma imiklamo ye-high-density, sincoma ukusebenzisa i-Arlon 85HT. Le nto ine-Z-axis CTE engu-35ppm/°C, okunciphisa kakhulu umehluko wokukhula kokushisa phakathi kwezingqimba nokunciphisa ingozi yokugoba ngesikhathi sokushintsha kwezinga lokushisa.

Ukukhetha izinto ezisetshenziswayo ezinamavelu e-CTE ahambisanayo kuqinisekisa ukuzinza okungcono kokushisa futhi kunciphisa amathuba e-warpage ye-PCB.

3. Ukulawula Ukucindezeleka Enqubweni Yokucwenga

Inqubo ye-lamination ingenye yezigaba ezibucayi kakhulu ekwenziweni kwe-PCB, lapho ukulawulwa okungalungile kwezinga lokushisa nokucindezela kungabangela i-warpage. Imingcele eyinhloko ethinta i-warpage ngesikhathi sokucwenga ihlanganisa izinga lokushisa nokucindezela kwe-lamination. Ucwaningo lukhombisa ukuthi cishe u-80% wezinkinga zamakhasi e-warpage aqala ngenxa yokugcwala okungafanele.

• Izinga Lokushisa: Silawula ukukhuphuka kwezinga lokushisa ngesikhathi senqubo ye-lamination ngesilinganiso se-2-3 ° C / min ukuvimbela ukushaqeka okushisayo okungabangela ukucindezeleka.
• I-Lamination Pressure: Ukulungisa ingcindezi ye-lamination ngokusekelwe ku-prepreg resin flow kuqinisekisa ingcindezi efanayo kulo lonke ibhodi. Silungisa ingcindezi ibe ngu-300-400psi ukuze uthole imiphumela emihle.

Ubuchwepheshe Obunelungelo Lobunikazi be-Highleap : Inqubo yethu yokubopha i-vacuum ehlukanisiwe isusa ngaphezu kwama-90% e-resin voids, iqinisekisa ukusatshalaliswa kwe-resin okufanayo futhi inciphise amathuba okucindezeleka kwangaphakathi kanye nokugoba.

Ngokulawula amapharamitha we-lamination, siqinisekisa ukuthi izendlalelo ziboshwe ngokulinganayo, ukuvimbela i-warpage ukuthi ingenzeki.

4. Ukulawula Ngokunemba Enqubweni Yokubhaka

Ukubhaka okufanele kwama-PCB kubalulekile ukususa umswakama nokuqinisekisa ukuphulukiswa kwe-resin. Kodwa-ke, ukungaqondi kahle okuvamile ukuthi ukubhaka ku-120 ° C amahora amane kwanele kuwo wonke amabhodi, okungenzeka anembile.

Indlela Yokubhaka Yesayensi :

• Okwamabhodi ≤ 1.0mm: Bhaka ku-125 ° C × (ukujiya kwebhodi × 1.2) amahora ukuze uqinisekise ukususwa komswakama okufanele kanye nokuphulukiswa kwe-resin.
• Okwamabhodi ≥ 2.4mm: Khulisa kancane izinga lokushisa libe ngu-150 ° C futhi ugcine amahora (ukujiya kwebhodi × 0.8) ukuze uvimbele ukungqubuzana okuhlobene nomswakama kumabhodi aminyene.

Inzuzo Yemishini Ye-Highleap : Ama-oven ethu okuphendula ngomswakama ahlala eqapha amazinga omswakama ku-PCB, eqinisekisa ukuthi okuqukethwe komswakama kugcinwa ngaphansi kuka-0.05%. Lokhu kuqinisekisa ukulawulwa okungcono kwenqubo yokulungisa futhi kunciphisa ukugoba okubangelwa ukwanda komswakama phakathi nezinyathelo zokukhiqiza ezilandelayo.

Ukulawula okunembile kwenqubo yokubhaka kuqinisekisa ukuthi ukuwohloka okuhlobene nomswakama kuyancishiswa.

5. Ukuthuthukisa Ngokuhlanganyela Izinqubo Zomhlangano

Ngaphezu kwezigaba zokuklama nokukhiqiza, izinqubo zokuhlanganisa nazo zidinga ukuthuthukiswa ukuze kuncishiswe imiphumela ye-warpage. Ngesikhathi somhlangano we-SMT (Surface Mount Technology), i-warpage ingaba nomthelela ekubekweni nasekuhlanganisweni kwezingxenye, okuholela ekulimaleni. Ukuthuthukisa ngokubambisana kuyadingeka ukuze kuxazululwe le nkinga.

• I-RSS Temperature Curve vs. RTS: Ngokusebenzisa amajika okushisa e-RSS (Ramp to Soak Soldering), sehlisa i-warpage ngo-35% uma kuqhathaniswa namajika e-RTS (I-Ramp to Temperature) evamile.
• I-Slotting ku-Carrier Fixtures: Ukwengeza amadizayini afakiwe ezimpahleni zenkampani yenethiwekhi kunciphisa ukugxiliswa kwengcindezi yokushisa ngo-60%, okusiza ukugcina flatness ye-PCB ngesikhathi sokuhlanganiswa.

Isevisi Enenani Engeziwe le-Highleap : Sinikeza ukwesekwa kokuthuthukiswa kwephrofayili ngokwezifiso ukusiza amakhasimende ethu ukuthi athuthukise izinga lokushisa kanye nezilungiselelo zenqubo zemiklamo yawo ethile ye-PCB. Lokhu kusekelwa okulungiselelwe kuqinisekisa ukulungiswa okungcono kanye nezinkinga ezimbalwa zokuhlanganiswa ngenxa ye-warpage.

Ukuthuthukisa izinqubo zokuhlanganisa, ngokuhambisana nokuklama nokukhiqiza, kuqinisekisa ukuthi i-warpage ayiphazamisi izigaba zokugcina zokukhiqiza.

Ngokusebenzisa lezi zinyathelo ezinhlanu eziyinhloko zokuvimbela, abakhiqizi bangabhekana ngokuphumelelayo nezimbangela ze-PCB warpage. Inhlanganisela yomklamo wethusi olinganiselayo, ukukhethwa kwezinto ngokucophelela, i-lamination elawulwa ukucindezeleka, ukubhaka okunembile, nezinqubo zokuhlanganisa ezenziwe kahle kunciphisa kakhulu ingozi yokungqubuzana, ukuqinisekisa ikhwalithi ephezulu kanye nama-PCB athembekile.

Ilungisa i-PCB Warpage

Ezimeni lapho i-warpage ivela khona, izindlela ezimbalwa zingasetshenziswa ukucaba ibhodi. Lezi zindlela zisukela ekulevelini okulula komshini kuye ekwelashweni okushisayo okuthuthuke kakhulu:

1. I-Roller Leveling

Ngekhasi le-warpage elithambile, i-PCB ingadluliswa nge-roller leveler, efaka ingcindezi yokucaba ibhodi. Lesi yisixazululo esivamile ezigabeni zokuqala zokukhiqiza.

2. Ukucindezela Okushisayo Nokubandayo

Ukuze uthole impi enzima kakhulu, ukucindezela okushisayo kuyisixazululo esisebenza kangcono. Kule nqubo, i-PCB esontiwe iyashisisa futhi icindezelwe ukuze isuse izingcindezi zangaphakathi bese iyibuyisela esimweni esiyisicaba.

3. I-Bow Mold Flattening

I-Bow mold flattening iyindlela ekhethekile lapho i-PCB esontiwe ifakwa esikhunjini esigobela i-PCB kwelinye icala. I-PCB ibe isishisisiwe ukuze ivumele inhlaka ukuthi ikhululeke futhi ibuyisele ibhodi esimweni esiyisicaba.

Isiphetho: Ukunciphisa I-Warpage ye-PCB nge-Highleap Electronic

Ukuvimbela nokulungisa i-warpage ye-PCB kudinga ukuqonda okujulile kwezakhiwo zezinto ezibonakalayo, ukuguquguquka kwe-thermal, nezimiso zokuklama. Kwa-Highleap Electronic, sisebenzisa isipiliyoni seminyaka engu-20 nobuchwepheshe obuthuthukisiwe ukuze siqinisekise ukuthi ama-PCB akho akhiqizwa anamakhasi amancane e-warpage, athuthukisa ukusebenza futhi anciphise izindleko zokukhiqiza.

Uma ubhekene nezinkinga ezimpintshanayo emugqeni wakho wokukhiqiza, sekuyisikhathi sokuba uzakwethu ne-Highleap Electronic. Xhumana nathi namuhla ukuze uthole:

• Ukuhlaziywa kwamahhala kwe-warpage
• Izixazululo zezinto ezenziwe ngezifiso
• Imibiko yokwenzeka kokukhiqiza

Ithimba lethu lochwepheshe likulungele ukukusiza ukuthi uqinisekise ukuthi ama-PCB akho ahlala eyisicaba, ethembekile, futhi elungele ukuhlanganiswa. Xhumana manje ukuze uxazulule izinkinga zakho ze-warpage nozakwethu omethembayo.