Ngomkhwa wophuhliso wokwenziwa kweminiaturization yamacandelo e-SMD kunye neemfuno eziphezulu neziphezulu zenkqubo ye-SMT, ishishini lokwenziwa kombane lineemfuno eziphezulu neziphezulu zezixhobo zovavanyo.Kwixesha elizayo, iiworkshops zemveliso ye-SMT kufuneka zibe nezixhobo ezininzi zokuvavanya kunezixhobo zokuvelisa ze-SMT.Isisombululo sokugqibela kufuneka sibe yindibaniselwano ye-SPI + AOI phambi kwesithando somlilo + AOI + AXI emva kwesithando somlilo.
- Intsingiselo yokwenziwa kweminiaturization yamacandelo e-SMD kunye nemfuno yezixhobo ze-AOI
Ngenkqubela yoluntu kunye nophuhliso lwesayensi kunye nobuchwepheshe, izixhobo eziphathwayo ziya zihlangabezana neminqweno eyahlukeneyo yabantu, kwaye imveliso iya iphucuka ngakumbi, njengee-headsets zeBluetooth, iiPDA, ii-netbooks, iMP4, amakhadi e-SD njalo njalo.Imfuno yezi mveliso ivuselele uphuhliso lwe-miniaturization yamacandelo e-SMD, kwaye i-miniaturization yamacandelo iye yakhuthaza ukuphuhliswa kwezixhobo eziphathekayo.Umkhwa wophuhliso lwamacandelo e-SMD asebenzayo unje: Amacandelo e-0603 avele kwi-1983, amacandelo e-0402 avela kwi-1989, amacandelo e-0201 aqala ukubonakala ngo-1999, kwaye namhlanje siqalise ukusebenzisa amacandelo e-01005.
Amalungu e-01005 aqale asetyenziswa kwizixhobo zonyango ezingakhathaliyo kunye nezingabizi kakhulu njengee-pacemakers.Ngomlinganiselo omkhulu wemveliso ye-01005, ixabiso lezinto ze-01005 liye lehla ngamaxesha e-5 xa kuthelekiswa nexabiso xa liqaliswa okokuqala, ngoko ke ukusetyenziswa kwamacandelo e-01005 kunye nokunciphisa iindleko, ububanzi buqhubeka ngokwandiswa kwiimveliso eminye imimandla, ngaloo ndlela ikhuthaza ukuvela okuqhubekayo kweemveliso ezintsha.
Amacandelo e-SMD aguquke ukusuka ku-0402, ukuya ku-0201 kwaye emva koko ukuya ku-01005. Utshintsho lobungakanani luboniswe kumzobo ongezantsi:
Ubungakanani be-01005 chip resistor yi-0.4 mm × 0.2 mm × 0.2 mm, indawo yi-16% kuphela kunye ne-44% yangaphambili ezimbini, kunye nomthamo we-6% kuphela kunye ne-30% yangaphambili ezimbini.Kwiimveliso ezinobungakanani besayizi, ukuthandwa kwe-01005 kuzisa ubomi kwimveliso.Ewe kunjalo, ikwazisa imingeni emitsha kunye namathuba kwishishini lemveliso yombane!Ukuveliswa kwezixhobo ze-01005 kunye namacandelo e-0201 kubeka iimfuno ezichanekileyo eziphezulu kakhulu kwisixhobo sokuvelisa i-SMT ukusuka ngaphambili ukuya ngasemva.
Kumacandelo e-0402, ukuhlolwa okubonakalayo sele kunzima kakhulu kwaye kunzima ukuhlala, kungasathethwa ke ngezinto ezithandwayo ze-0201 kunye nokuphuhlisa i-01005.Ngoko ke, sisivumelwano soshishino ukuba imigca yemveliso ye-SMT idinga izixhobo ze-AOI ukuze zihlolwe.Kumacandelo afana ne-0201, ukuba i-defect iyenzeka, inokufakwa kuphela phantsi kwe-microscope kwaye ilungiswe ngezixhobo ezikhethekileyo.Ngoko ke, iindleko zokugcinwa ziye zaba phezulu kakhulu kune-0402. Kumacandelo e-01005 ubukhulu (0.4 × 0.2 × 0.13mm), kunzima ukubona ngeso lenyama yedwa, kwaye kunzima ngakumbi ukusebenza nokugcina. nangasiphi na isixhobo.Ke ngoko, ukuba icandelo le-01005 lineziphene kwinkqubo, ayinakulungiswa.Ke ngoko, ngophuhliso lwezixhobo ezincinci, sifuna oomatshini abaninzi be-AOI ukulawula inkqubo, kungekuphela nje ukufumanisa iimveliso ezineziphene.Ngale ndlela, sinokufumana iziphene kwinkqubo kwangoko, siphucule inkqubo, kwaye sinciphise ukwenzeka kweempazamo.
- Ngale ndlela, sinokufumana iziphene kwinkqubo kwangoko, siphucule inkqubo, kwaye sinciphise ukwenzeka kweempazamo.
Nangona izixhobo ze-AOI zaqala kwiminyaka engama-20 eyadlulayo, ixesha elide, zazixabisa kakhulu kwaye kunzima ukuziqonda, kwaye iziphumo zokubhaqwa zazinganelisi.I-AOI ibikho nje ngengqiqo kwaye ayizange yamkelwe yimarike.Nangona kunjalo, ukusukela ngo-2005, i-AOI ikhule ngokukhawuleza.Ababoneleli bezixhobo ze-AOI sele bekhulile.Iingcamango ezintsha ezahlukeneyo kunye neemveliso ezintsha ziye zavela enye emva kwenye.Ngokukodwa, abavelisi bezixhobo ze-AOI basekhaya libhongo laseTshayina'Ishishini le-SMT, kunye nezixhobo zasekhaya ze-AOI ziyasebenza.Ngokwenyani, ayisahla inyuka ngeemveliso zangaphandle, kwaye ngenxa yokunyuka kwe-AOI yangaphakathi, ixabiso lilonke le-AOI lehle laya kutsho kwi-1/2 ukuya kwi-1/3 yangaphambili.Ngoko ke, ngokwexabiso labasebenzi elondolozwe yi-AOI endaweni yokuhlola okubonwa ngesandla, ukuthenga i-AOI nako Kufanelekile, singasathethi ke ukuba ukusebenzisa i-AOI kunokunyusa umgangatho othe ngqo wemveliso kwaye ufumane isiphumo sokubhaqa esizinze ngakumbi kunoko. incwadi yesandla.Ngoko ke i-AOI sele isisixhobo esiyimfuneko kubavelisi abakhoyo abasetyenzwayo be-SMT.
Kwiimeko eziqhelekileyo, i-AOI inokufakwa kwiindawo ze-3 kwinkqubo yokuvelisa i-SMT, emva kokuprinta i-solder paste, ngaphambi kokuba i-reflow soldering kunye ne-reflow soldering ukujonga umgangatho wamacandelo ahlukeneyo.Nangona ukusetyenziswa kwe-AOI sele kuyinto eqhelekileyo, abavelisi abaninzi basafakela kuphela i-AOI emva kweziko, kwaye basebenzise i-AOI njengomgcini-sango wokugqibela ukuze imveliso ingene kwicandelo elilandelayo, kuphela endaweni yokuhlola okubonwa ngesandla.Ukongeza, abavelisi abaninzi basenokungaqondi malunga ne-AOI.Ayikho i-AOI enokufikelela kuvavanyo lobuxoki, kwaye akukho AOI inokufikelela kuvavanyo oluphosiweyo.Uninzi lwee-AOIs zikhetha ibhalansi elungileyo phakathi kovavanyo lobuxoki kunye novavanyo oluphosiweyo, kuba i-algorithm ye-AOI yiyo nayiphi na indlela.Thelekisa isampuli yangoku kunye nesampulu yekhompyutheni (mhlawumbi umfanekiso okanye ipharamitha), kwaye wenze isigwebo esisekelwe ekufananeni.
Okwangoku, kusekho iikona ezininzi ezifileyo kwi-AOI emva kokuba isithando somlilo sisetyenzisiwe.Umzekelo, i-lens enye i-AOI inokubona kuphela inxalenye ye-QFP, i-SOP, kunye ne-welding yobuxoki.Nangona kunjalo, izinga lokubhaqwa kweelensi ezininzi ze-AOI ze-QFP kunye neenyawo eziphakanyisiweyo ze-SOP kunye ne-tin encinci kuphela yi-30% ephezulu kune-single-lens AOI, kodwa yonyusa ixabiso le-AOI kunye nobunzima bokusebenza kwenkqubo.Le mifanekiso iveliswa kusetyenziswa ukukhanya okubonakalayo.I-AOI ayinawo amandla okubona i-solder engabonakaliyo njengebhola ezilahlekileyo ze-BGA kunye ne-PLCC yokuthengisela ubuxoki.
Ixesha lokuposa: Aug-19-2020