Hanyar kariya daidai
A cikin haɓaka samfurin, daga yanayin farashi, ci gaba, inganci da aiki, yawanci ya fi kyau a yi la'akari da hankali da aiwatar da daidaitaccen tsari a cikin sake zagayowar ci gaban aikin da wuri-wuri.Maganganun aikin yawanci ba su dace ba dangane da ƙarin abubuwan haɗin gwiwa da sauran shirye-shiryen gyara "sauri" waɗanda aka aiwatar a cikin lokacin aikin.Ingancinsa da amincinsa ba su da kyau, kuma farashin aiwatarwa a baya a cikin tsari ya fi girma.Rashin hangen nesa a farkon ƙirar aikin yawanci yana haifar da jinkirin bayarwa kuma yana iya haifar da rashin gamsuwa ga abokan ciniki da samfurin.Wannan matsalar ta shafi kowane ƙira, ko simulation, lambobi, lantarki ko na inji.
Idan aka kwatanta da wasu yankuna na toshe IC guda ɗaya da PCB, farashin toshe PCB gabaɗaya kusan sau 10 ne, kuma farashin toshe samfuran duka shine sau 100.Idan kana buƙatar toshe ɗakin ko ginin gaba ɗaya, farashi hakika adadi ne na taurari.
A cikin haɓaka samfurin, daga yanayin farashi, ci gaba, inganci da aiki, yawanci ya fi kyau a yi la'akari da hankali da aiwatar da daidaitaccen tsari a cikin sake zagayowar ci gaban aikin da wuri-wuri.Maganganun aikin yawanci ba su dace ba dangane da ƙarin abubuwan haɗin gwiwa da sauran shirye-shiryen gyara "sauri" waɗanda aka aiwatar a cikin lokacin aikin.Ingancinsa da amincinsa ba su da kyau, kuma farashin aiwatarwa a baya a cikin tsari ya fi girma.Rashin hangen nesa a farkon ƙirar aikin yawanci yana haifar da jinkirin bayarwa kuma yana iya haifar da rashin gamsuwa ga abokan ciniki da samfurin.Wannan matsalar ta shafi kowane ƙira, ko simulation, lambobi, lantarki ko na inji.
Idan aka kwatanta da wasu yankuna na toshe IC guda ɗaya da PCB, farashin toshe PCB gabaɗaya kusan sau 10 ne, kuma farashin toshe samfuran duka shine sau 100.Idan kana buƙatar toshe ɗakin ko ginin gaba ɗaya, farashi hakika adadi ne na taurari.
Manufar garkuwar EMI ita ce ƙirƙirar kejin Faraday a kusa da rufaffiyar amo na RF na akwatin ƙarfe.Bangarorin biyar na saman an yi su ne da murfin garkuwa ko tankin ƙarfe, kuma ana aiwatar da gefen ƙasa tare da yadudduka na ƙasa a cikin PCB.A cikin harsashi mai kyau, babu fitarwa da zai shiga ko barin akwatin.Wadannan hayaki masu cutarwa da aka karewa za su faru, kamar fitowar su daga huɗa zuwa ramukan gwangwani, kuma waɗannan gwangwani suna ba da damar canja wurin zafi yayin dawowar solder.Hakanan ana iya haifar da waɗannan ɗigogi ta hanyar lahani na matashin EMI ko na'urorin haɗi.Hakanan za'a iya sauke karar daga sararin samaniya tsakanin shimfidar bene na ƙasa zuwa saman ƙasa.
A al'adance, ana haɗa garkuwar PCB zuwa PCB tare da wutsiyar walda ta pore.Wutsiyar walda tana da hannu da hannu bayan babban aikin ado.Wannan tsari ne mai cin lokaci da tsada.Idan ana buƙatar kulawa yayin shigarwa da kiyayewa, dole ne a haɗa shi don shigar da kewaye da abubuwan da ke ƙarƙashin shingen kariya.A cikin yanki na PCB mai ƙunshe da wani abu mai mahimmanci, akwai haɗarin lalacewa mai tsada sosai.
Siffar yanayin tankin garkuwar matakin ruwa na PCB kamar haka:
Ƙananan sawun;
Ƙarƙashin maɓalli;
Zane guda biyu (shinge da murfi);
Wuce ko manna surface;
Multi-cavity juna (keɓe mahara abubuwa tare da wannan garkuwa Layer);
Kusan sassaucin ƙira mara iyaka;
Hanyoyi;
M murfi don abubuwan haɓakawa da sauri;
I / O rami
Ƙarƙashin haɗin haɗi;
Mai ɗaukar RF yana haɓaka garkuwa;
Kariyar ESD tare da kayan kwalliya;
Yi amfani da ingantaccen aikin kullewa tsakanin firam da murfi don dogaro da gaske hana tasiri da rawar jiki.
Kayan kariya na yau da kullun
Yawancin kayan kariya iri-iri ana iya amfani da su, gami da tagulla, azurfa nickel da bakin karfe.Mafi yawan nau'in shine:
Ƙananan sawun;
Ƙarƙashin maɓalli;
Zane guda biyu (shinge da murfi);
Wuce ko manna surface;
Multi-cavity juna (keɓe mahara abubuwa tare da wannan garkuwa Layer);
Kusan sassaucin ƙira mara iyaka;
Hanyoyi;
M murfi don abubuwan haɓakawa da sauri;
I / O rami
Ƙarƙashin haɗin haɗi;
Mai ɗaukar RF yana haɓaka garkuwa;
Kariyar ESD tare da kayan kwalliya;
Yi amfani da ingantaccen aikin kullewa tsakanin firam da murfi don dogaro da gaske hana tasiri da rawar jiki.
Gabaɗaya, ƙarfe-plated karfe shine mafi kyawun zaɓi don toshe ƙasa da 100 MHz, yayin da tin-plated jan karfe shine mafi kyawun zaɓi sama da 200 MHz.Tin plating zai iya cimma mafi kyawun aikin walda.Saboda aluminum kanta ba shi da halaye na zubar da zafi, ba shi da sauƙi don waldawa zuwa Layer na ƙasa, don haka yawanci ba a yi amfani da shi don kare matakin PCB ba.
Dangane da ƙa'idodin samfurin ƙarshe, duk kayan da aka yi amfani da su don garkuwa na iya buƙatar cika ma'aunin ROHS.Bugu da ƙari, idan ana amfani da samfurin a cikin yanayi mai zafi da zafi, yana iya haifar da lalatawar lantarki da oxidation.
Lokacin aikawa: Afrilu-17-2023