Izindlela Zokwehluleka Ezivamile ze-PCB nokuthi Sizigwema Kanjani

Ama-PCB asephenduke izisekelo ezibalulekile kuwo wonke ama-electronics omthengi kanye nezimboni. Kodwa-ke, lawa mamojula ayinkimbinkimbi, anobuchwepheshe obuningi futhi amema iziphambeko ezivela ezinqubweni zokwenziwa eziyinkimbinkimbi, izindlela zokuhlanganisa izingxenye eziyinselele, izindawo zokusebenza ezinokhahlo, nokugqokwa okulula ngokuhamba kwesikhathi. ukuguga. 

Ngaphandle kokulawulwa kwekhwalithi ngenkuthalo kanye nokuqinisekiswa kwenqubo, amaphutha acashile noma ukuwohloka ngokweqile kungashintsha ngokushesha ukwakheka okungenangozi kube indlela yokwehluleka kwenkambu eyinhlekelele okuholela ekubuyiselweni kwamakhasimende ethusayo, izindleko ezibizayo zewaranti, isithunzi esibi, nokulahleka kokuthengisa.

Lo mhlahlandlela obanzi uhlola izindlela ezivame kakhulu zokuhluleka kwe-PCB, imvelaphi yokukhubazeka, izindlela zokuhlola, izenzo zokulungisa, namasu okunciphisa ubunjiniyela bezikhali namathimba okusebenza ngokuqwashisa okudingekayo ukuze kugcinwe ukwethembeka komkhiqizo.

Isikali Sokusetshenziswa kwe-PCB kanye Nezingozi Zokwehluleka Okuhlobene

Amabhodi esekethe aphrintiwe ahlala emnyombweni wawo wonke umshini kagesi. Isidingo senyuke kakhulu eminyakeni yamuva nje, njengoba ukuthengiswa kwe-PCB emhlabeni wonke kukhule ngaphezu kwezigidigidi ezi-3.7 zamarandi ngonyaka kusukela ngo-2010 ukuze kwedlule ama-dollar ayizigidi eziyizinkulungwane ezingama-75 kusukela ngo-2021 ngokusho kwedatha yenhlangano yezimboni.

Lesi sikali esikhulu kakhulu sihumusheka ezigidini zama-PCB ezinhlobonhlobo zezinhlelo zokusebenza ezibhekana nengcindezi eqhubekayo ngaphansi kwenqwaba yamandla kagesi, amandla, izinga lokushisa, ukudlidliza nezinye izimo zemvelo kanye nokuguga kwezinto ezingenakugwenywa. Ngisho namazinga okukhubazeka amancane ngokungavamile asaqongelela amanani okwehluleka okukhulu.

Ngokuhlolisisa imvelaphi yokwehluleka okufanayo, izinqubomgomo zokuvimbela ezinengqondo, izindlela zokuhlola ezingokoqobo, nezinqubo ezisebenzayo zokuphinda zisebenze, abakhiqizi bafinyelela amazinga aphezulu ekhwalithi anciphisa izindleko kuyilapho evikela ulwazi lwamakhasimende lokugcina.

I-PCB Failure Definition, Impact, kanye Nezinselele Zokuxilonga

Ibhodi lesifunda eliphrintiwe elihlulekile alisasayinzi imisebenzi yalo elihlosiwe ngokwanele ngenxa yezikhindi zikagesi eziyinhlekelele, ukusebenza okuvulekile, noma ukungabekezeleli okuhlobene nokucaciswa kwangempela. Ukwehluleka ngezikhathi ezithile kumela isigaba esikhathazayo sokuxazulula inkinga.

Indlela yokwehluleka kanye nembangela eyinhloko ingase ihlale ku-PCB ngokwayo noma izinamathiselo njengezixhumi, amabhondi ezintambo, namajoyinti e-solder. Noma ngabe, imithelela yokusebenza neyomnotho ihlangana ngokushesha njengoba ibhodi elihlulekile cishe lihlanganisa isistimu engaphansi ebalulekile emkhiqizweni omkhulu futhi ngenxa yalokho yonakala.

Ngokungafani nokuhluleka kwengxenye ye-semiconductor ecacile okutholakala kalula kwasendaweni kusetshenziswa okokusebenza okuyisisekelo kokuxilonga, ukwakhiwa kwe-PCB okuyinkimbinkimbi okwenziwa inkimbinkimbi encane, amaphakethe esekethe e-SMD anezingqimba eziningi kuvimbela ukuhlukaniswa kwamaphutha kalula ngaphandle kwamathuluzi e-X-ray. Lesi sithiyo sidinga ukucatshangelwa kusengaphambili kwedizayini evumela ukuhlolwa.

Izigaba Ezibalulekile Zokuhluleka kwe-PCB ezinemisuka kanye namasu okuvikela

Plating Voids

Ukufakwa kwensimbi enamachashaza ngaphakathi kwezimbobo ezipuletiwe kuletha ukuthambekela ekuvulekeni ngaphansi kwezingcindezi ezishisayo noma zokudlidliza njengokuqhubeka okusezingeni eliphansi kanye nokunamathela kudala ukuphuka. Izikhungo zokuvimbela ezilawulweni zokungcola, ukwenziwa kusebenze okufanele kwe-catalyst, ukusatshalaliswa kwethusi okufanayo, nezindonga zembobo ezibushelelezi.

Ukusulwa Komphetho Okwanele

Isikhala esincane kakhulu phakathi kwemigqa yethusi kanye nemingcele yamabhodi kubeka engcupheni ukufinyela komonakalo noma wokuphatha uma kubhekwa ubuncane bengubo evamile yokuvikela . Imithetho yokuhlukanisa egcina ukugcinwa kanye nokuhlaziywa okuphelele kwe-DFM kuvimbela ukwehluleka okunjalo.

I-Cold Solder & Okunye Ukukhubazeka Kwamalunga

Ukugeleza kabusha okungaphelele, ukunyakaza okungapheli, ukungcoliswa, noma ukuthutha kwezinto zesikhathi eside kubeka engcupheni ukuxhumana okubalulekile ekudluliselweni kwamandla kanye nokusayina ubuqotho. Ukuqinisekiswa kwenqubo, ukuthuthukiswa kwezinto, ukuqeqeshwa, nohlu lokuhlola luqinisa ikhwalithi yokuhlanganisa.

I-Etching-Related Copper Slivers

Izingcezu zensimbi ezibekwe kabusha zibhuloho amakhondaktha angahlobene noma ama-coatings angena ukuze anike amandla amasekhethi amafushane ekugcineni asuka ku-condensation esetshenziswayo noma ama-voltages adlula imikhawulo yokufaka. Izilawuli zokuminyana kwephethini eziqinile ezihambisana nemijikelezo yokuwasha enolaka kunciphisa amazinga okukhubazeka.

I-Inter-Pad Copper eveziwe

Ukuguga, ukukhuhlana, noma ukunganeli kahle kwemaski yokusongelwa ngesikhathi sokwenziwa kususa izendlalelo ezibalulekile zokuvikela ezihlukanisa ama-landing pad ensimbi aseduze asengozini yokushoda komswakama wendawo noma i-arcing kagesi. Ububanzi bedamu lemaski yokulondoloza kanye nezakhiwo zemaski ezithuthukisiwe kuyasiza.

Ezinye Izinto Ezivamile Zengozi ye-PCB

• Ukufakwa kwe-agent etching acute
• Ukuphazanyiswa kwe-electromagnetic
• Izingxenye ezisezingeni eliphansi
• Izinkinga ezishisayo kuzo zonke izixhumanisi
• Ukungcola okubalulekile nama-dendrites

Ngokuqhakambisa izindlela zokwehluleka kwe-PCB ezivame ukusheshisa izinga lokufa kwezinsana futhi kuphele kungazelelwe isikhathi sempilo yokusebenza, onjiniyela bangakwazi ukubeka phambili imizamo yokunciphisa eqondise lobo buthakathaka ngemiphumela emibi kakhulu.

Ukusebenzisa Izindlela Zokuhlola Zokuthola Ukukhubazeka Kwe-PCB Kwasekuqaleni

Njengoba ibhodi ngalinye elikhiqiziwe lisebenzisa izindleko ezibalulekile zempahla nezabasebenzi, ukuhlonza ngokushesha kokubili iziphambeko zenhlangano ebonakalayo kanye nomonakalo ocashile ovela ezinsizakalweni zokulawula eziphazamisekile kusiza ukukhiqiza ngokulungisa noma ukusula amabhodi amabi kusenesikhathi kuyilapho futhi inikeza impendulo ukuze kuthuthukiswe izinzuzo zezibalo.

I-X-ray imaging ihluke njengendlela yokuhlola ebaluleke kakhulu enikezwa ukungena ngale kwezindawo zangaphandle ezifinyeleleka kalula ukuze kwembulwe izimo ezingaphansi. Ngenxa yokuntula umbono omangalisayo onjalo, onjiniyela basebenzisa izinhlobonhlobo zezindlela zepragmatic:

Ukuhlolwa Okubonakalayo - Ukukhanya okukhanyayo, ukukhulisa, kanye nokujwayelana kwamaphethini kwenza kube lula ukubona izingxenye ezingekho noma ezingaqondile, umonakalo wokuklwebheka, ukushintsha kombala, amalunga angahambisani kanye nokuqhekeka kwebhodi.

Ukuhlolwa kwe-X-Ray – Izimbobo zangaphakathi ze-solder ezivaliwe, imifantu, ukungcola, ukuhlukaniswa kwezingqimba zezinto, kanye nokuqhekeka okufihliwe kubonakala kungacacile ngaphansi kokuhlolwa kwe-X-ray uma kuqhathaniswa nezinto ezizungezile eziboshwe kahle.

Ukuhlolwa Kokubona - Amakhamera anesinqumo esiphezulu adweba ngedijithali ama-geometri ebhodi yobuciko, ukufakwa kwezingxenye, kanye nezinombolo zombhalo ukuze abonise ngokuzenzakalelayo ukuphambuka kusuka kudatha yokukhiqiza esizwa yikhompyutha (i-CAM) ngokusebenzisa ama-algorithms okufanisa amaphethini ngaphansi kwezikhathi zokukhiqiza eziyinselele.

Ukuhlolwa Kukagesi - Esikhundleni sokuhlola ukwakheka okubonakalayo, ama-probe okuhlola ngaphakathi kwesekethe asebenzisa ama-net axhumene ngogesi anokufakwa kwesignali okuguquguqukayo ngenkathi eqapha imiphumela yokusebenza kanye nezilinganiso zokusebenza kwe-parametric njenge-currents, ama-voltage, ama-frequency, kanye namaphethini okushintshashintsha ukuze kuhambisane nemininingwane.

Ngokusebenzisa iresiphi yokuhlola efanele ehambisana nezindleko namandla okwenza inani nokuba sengozini komkhiqizo othile, abakhiqizi balondoloza izindinganiso zekhwalithi ezingaguquki.

Uhlolojikelele lwezinyathelo zokulungisa eziphendula ukushiyeka kwe-PCB

Alikho inani lokuklama, ukucutshungulwa noma ukuqapha kokuhlola okuletha umkhiqizo ophelele ongenakho ukushiyeka kwezikhathi ezithile okubalekela ukutholwa ensimini. Ukuxazulula izinkinga kulondoloza ukuqhubeka kokusebenza.

Ukuphinda Usebenze – Ochwepheshe abanekhono basebenzisa izinsimbi ezikhethekile zokushisela ezincane, ama-heater kanye namanye amathuluzi ayinkimbinkimbi ukususa izingxenye ezinephutha nokugcwalisa kabusha amabhodi ngokufaka amanye esikhundleni sawo abuyiselwe esimweni sokusebenza ngemva kokuhlolwa okubanzi.

Ukuxazulula Izinkinga - Esikhundleni sokulahla ngokushesha, amasu ajulile okuhlukanisa amaphutha ahilela ukujova kwamandla kagesi, izithombe zokushisa kanye neziginesha zikagesi zibonisa imvelaphi yokwehluleka kanye nezindlela zokubonisa ukulungiswa kwenqubo okubanzi okungaba khona okuthuthukisa wonke umphakathi.

Ukubuyekezwa Komklamo – Ngezinkinga eziphindaphindayo ezilandelelwa kuzakhiwo zesekethe ezisemaphethelweni noma ezibucayi, ukubuyekezwa kwebhodi kunezela amanani okulungisa izingxenye, ububanzi bokulandelela, ama-stackup ezingqimba, kanye namabhande okuvikela ukusebenza ukuze kuqiniswe ukuqina.

Ukuhlela Inqubo - Ukushintsha kwamapharamitha ezemvelo njengamaphoyinti okushisa, isivinini sokuthutha, ingcindezi ye-lamination, noma amakhemikhali kushintsha imiphumela yokukhiqiza ukuze kuncishiswe izandulela zokukhubazeka.

Ukuzibandakanya Kwabahlinzeki – Uphenyo oluhlanganisa ochwepheshe be-substrate, abakhiqizi bamakhemikhali, ochwepheshe bokuhlanganisa, kanye nochwepheshe bemishini luletha imibono eminingi eveza amathuba okuthuthukisa ahlukene.

Ukulungisa – Ezimweni lapho ukulungiswa kabusha kubambezeleka khona, amanye amamojula amakhulu avumela ukulungiswa okuqondiwe, ukufinyela, noma ukwandiswa kokulungiswa ukubuyisela ukusebenza kwempahla ngokushesha nangokushibhile kunokushintsha okuphelele uma ukuwohloka kuhlala kusendaweni.

Ngokusebenzisa indlela yokubuyisela efanele eqondene namaphrofayili anesici, amathuba, kanye nezingozi eziwela phansi, abakhiqizi basekela amamethrikhi embuyekezo yefekthri nenkundla engaphezu kwamabhentshimakhi ekhwalithi ye-sigma ayisithupha abonisa ukuthuthuka okuqhubekayo kunokuma.

Isiphetho

Amabhodi esekethe aphrintiwe angenasici, anokwehluleka-amasosha omzimba ahambisana nezidingo zokusebenza kwe-elekthronikhi ezinwetshwa ngokwandayo kuyilapho amanani entengo entengo entengo ahambisanayo ahlala enzima naphezu kwemizamo ye-herculean yokucaciswa kokunemba, ukuqinisekiswa kwekhwalithi, kanye nezinqubo zokujeziswa kwezinhlawulo ezinciphisa izingxenye ngenani lesilinganiso sokukhubazeka kuze kube manje elingenakulinganiswa ledijithi eyodwa.

Amaqiniso ezomnotho aphoqelela ukwamukela izehlakalo ezithile zokwehluleka okuthile ngokulinganisa ingozi ehlakaniphile kunokujaha ukuphelela okuphelele ngezinzuzo ezingokoqobo ezingenamsebenzi ngezindleko ezingenakulinganiswa. Esikhundleni salokho, izinqubomgomo zokuvimbela eziphusile eziqondise ekubeni sengozini okwaziwayo obuswa ukuqina okuphezulu kanye nokuba nokwenzeka, okuhambisana nezinqubo zokuphatha ezisheshayo ezivala umonakalo ngokusabela, ezisebenza kangcono kakhulu ukukhulisa umkhiqizo nokuthembeka.