Buga kwamiti na kewaye, musamman waɗanda ake amfani da su a cikin PDAs (mataimakan dijital na sirri) kamar wayoyin salula, suna da rauni ga cin zarafi. In addition to collecting dust that can seep into the case of a phone, PCBS are also prone to soaking in or splashing out of liquids during daily use on e-book readers and similar handheld devices. Sakamakon haka, masana’antar sabis ta fito wanda ke ba da sabis na tsaftacewa da gyara don gurɓatattun PCBS, amma ba tare da lalacewar jiki ba a cikin PDAs da manyan kayan aiki.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Idan ana amfani da hanyar tsaftacewa mara kyau, zai iya lalata haɗin kai, sassauta abubuwan da kayan lalata. To avoid these defects, you need to take as much care in choosing the right cleaning method as you do in designing, specifying, and manufacturing boards.

Menene waɗannan tarkuna? How can they be avoided?

A ƙasa, zamu bincika ingantattun zaɓuɓɓukan tsabtace PCB da wasu waɗanda ƙila ba za ku so ku yi amfani da su ba.

Daban -daban na gurɓatawa

All kinds of pollutants can accumulate on PCBS. Using the right response to an annoying problem will be more effective and will reduce headaches.

Dry contaminants (ƙura, datti)

Ofaya daga cikin yanayin da aka fi sani shine ƙura tana taruwa a ciki ko kusa da PCB. Yi amfani da hankali a hankali ƙaramin goge mai laushi (kamar goge fenti mai ruwan doki) don cire ƙura ba tare da ya shafi abubuwan da aka gyara ba. Akwai iyaka inda ko da ƙaramin buroshi zai iya kaiwa, kamar ƙarƙashin ɓangaren.

Matsanancin iska na iya isa wurare da yawa, amma yana iya lalata muhimman hanyoyin sadarwa, don haka yakamata a kula lokacin amfani da shi.

A specially designed vacuum cleaner for electronic components is also an option, but it is ubiquitous.

Ruwa masu gurɓatawa (datti, man kakin, juyi, soda)

High-temperature operations can turn certain wax-coated components into magnets for dust and dirt, resulting in sticky grime that can’t be removed with a brush or vacuum cleaner. In ba haka ba, samfurin zai sami soda mai ɗaci kuma ya lalata allon. Either way, these substances should be addressed before they accumulate and affect performance.

Za a iya cire yawancin tabo tare da masu tsabtacewa, kamar isopropyl barasa (IPA) da q-tips, ƙananan gogewa ko tsabtataccen auduga. Yi amfani da kaushi kamar IPA don tsabtace PCB kawai a cikin yanayin iska mai kyau, zai fi dacewa a cikin murfin hayaƙi.

Kuna iya amfani da ruwan da aka lalata maimakon. Be sure to remove excess moisture and dry the plate properly (a few hours in a low oven will help remove any remaining moisture.)

In addition to IPA, there are many commercially available PCB cleaners, ranging from acetone to chemicals used to clean electronic equipment. Masu tsabtace daban -daban na iya magance takamaiman nau’ikan gurɓatattun abubuwa, kamar juyi ko kakin zuma. Keep in mind that harsh cleaners can remove marks from components or damage plastic or electrolytic capacitor jackets or other exotic components (such as humidity sensors), so make sure that the cleaner you use is not too strong. Idan za ku iya, ba kwa buƙatar gwada masu tsabtace abubuwa akan tsoffin abubuwan haɗin gwiwa ko masu haɗawa don tabbatar da cewa ba ku yin ɓarna da yawa.

Ultrasonic PCB tsaftacewa

Yin amfani da injin tsabtace ultrasonic mai yawa yana haifar da cavitation. The tashin hankali implosion na biliyoyin kankanin kumfa a tsaftacewa bayani kunshe a cikin ultrasonic tsabtace tanki. Ana samar da kumfa ta hanyar transducer a haɗe zuwa kasan tanki kuma suna jin daɗin janareta a mitar ultrasonic. Za a busa fashewar waɗannan kumfa ta hanyar gurɓatawa daga tsattsarkan sassan.

Duban dan tayi za a iya ayyana shi a matsayin raƙuman sauti waɗanda mitoci suke sama da iyakar maɗaukakiyar ji na ɗan adam, watau kusan 20 kHz (20 kHz a sakan na biyu ko hawan keke 20,000). Tabbas, ana iya jin sautin mai tsabtace ultrasonic yayin aiki saboda tasirin abin da muke kira cavitation ultrasonic.

Dabarar ta rasa wasu fa’idojinta a matsayin hanyar tsaftacewa saboda tana iya haifar da lalacewar ɓangarori ko haɗi mara kyau da ƙura da datti. A zahiri, NASA ta ba da umarnin kar a yi amfani da tsabtataccen ultrasonic saboda ba da gangan ba zai iya haifar da murfin ƙarshen ɓangaren don rarrabe kuma a zahiri yana lalata wayoyin haɗin gwiwa a cikin IC da haɓakar ultrasonic na haɗin kushin waya na haɗin gwiwa ta hanyar gubar IC.

Bayan faɗi hakan, har yanzu akwai wuraren da za a iya amfani da tsabtace ultrasonic. Tsarin tsaftacewa na ultrasonic zai iya kaiwa ga mafi mawuyacin hali, wurare masu wuyar kaiwa zuwa ƙasa a ƙarƙashin babban taro mai yawa akan yawancin sassan allon kewaye. Wannan ba lamari bane ga kayan aikin SMD tare da ƙananan gibba waɗanda suka yi ƙanƙanta fiye da madaidaicin murfin saman tsabtace ruwa. Koyaya, tsarin yana da sauri, kuma akwai injina masu ƙima da yawa waɗanda za su iya ɗaukar tsabtataccen adadi mai yawa.

Injin tsabtace ultrasonic na PCB

Cavitation ba tsari ne mai sauƙi ba. An kirga cewa za a samar da yanayin zafi sama da 10,000 ° F da matsin lamba fiye da 10,000 PSI a wurin fashewar kumfa.

Masu tsabtace Ultrasonic na iya samar da mitoci daga 25 kHz zuwa 100+ kHz, ana auna su a cikin da’irar daƙiƙa. Ƙananan ƙananan ƙananan suna samar da kumfa cavitation mafi girma idan aka kwatanta da madaidaicin mitoci. Manyan kumfa sun fashe da ƙarfi, misali don cire duka gurɓatattun abubuwa daga sassan ƙarfe da aka ƙera. Mitoci masu girma suna samar da ƙananan kumfa, suna yin tsabtace kumfa amma sun fi iya shiga fasa, ramuka da ramukan makafi. Ana amfani da mitoci mafi girma don tsaftace shimfidar wuri mai rauni sosai.

ƙarshe

Akwai kamfanoni masu ƙwarewa a tsabtace PCB. Dangane da buƙatunku (kamar adadi mai yawa na katako, abin da ake buƙatar tsaftacewa, da kuma yadda farantan ke da rauni), kuna iya nemo madaidaicin madaidaicin waje don biyan bukatun tsabtace ku.

Idan galibi kuna da matsaloli tare da allon allon da ke buƙatar tsaftacewa, tabbas akwai ƙarin mahimman abubuwan da za a bincika yayin ƙira ko aiwatar da masana’antu.

Tsaftace PCBS ba dole bane ya zama aiki mai wahala. Tsayar da nasihohi da shawarwarin da ke sama zai taimaka wajen tabbatar da cewa an yi tsaftacewa daidai.