Amakhono okusebenza okuhlolwa kwe-PCB endizayo

Lesi sihloko sizokwabelana ngamasu afana nokuqondanisa, ukulungisa, nokuhlola ibhodi le-warping emisebenzini yokuhlola i-flying probe ukuze kusetshenziswe ireferensi kuphela.

1. I-Counterpoint

Into yokuqala okufanele ukhulume ngayo ukukhetha ama-counterpoints. Ngokuvamile, izimbobo ezimbili kuphela ze-diagonal okufanele zithathwe njengama-counterpoints. ?) Unganaki i-IC. Inzuzo yalokhu ukuthi kukhona amaphuzu ambalwa okuqondanisa, futhi isikhathi esincane esichithwa ekuhleleni. Ngokuvamile, i-etching ihlale ine-undercuts, ngakho-ke akunembile kakhulu ukukhetha amaphedi amaphoyinti okuqondanisa. Uma kunamasekhethi amaningi avuliwe, awudingi ukuthi ume ngokushesha, futhi ume lapho ukuhlolwa kwesifunda esivulekile kuqediwe futhi uqale ukuhlolwa kwesifunda esifushane, ngoba usungakwazi ukubuka amaphutha esekethe evulekile ngalesi sikhathi, ungakwazi engeza ukuma okuhlosiwe ngokuya ngendawo yephutha elibikiwe.

Ake sikhulume ngokuqondanisa mathupha futhi. Ukukhuluma ngokuqinile, izimbobo azikho phakathi nendawo yamaphedi, ngakho-ke lapho ubeka, kufanele amachashazi abekwe phakathi nendawo yamaphedi ngangokunokwenzeka, noma uzame ukuhambisana nezimbobo zangempela? Ngokujwayelekile uma kunamaphuzu amaningi okufanele ahlolwe Ngomgodi, khetha owakamuva. Uma ngokuvamile kuyi-IC, ikakhulukazi uma i-IC ithambekele ekujikelezeni okungelona iqiniso, udinga ukubeka imbobo yokuqondanisa phakathi kwephedi.

Okwesibili, ifreyimu engashintshi

Uzimele ogxilile ubakaki wokuhlola ongashintshi. Idatha enozimele imelelwa amabhokisi amabili. Uhlaka lwangaphandle luhlaka. Ebhodini elinjalo, ubukhulu obunikezwe umshini bungasetshenziswa ngokuqondile. Ngedatha ngaphandle kohlaka, Imelwe ibhokisi. Singasebenzisa umyalo webhodi lombukiso (ozosetshenziswa lapho ubheka isiqondiso sebhodi) ukuze sibone ukuthi iyiphi iphedi ehlolwayo onqenqemeni oluseduzane. Qhathanisa nebhodi langempela ukuze ubone ibanga layo ukusuka onqenqemeni Ingakanani esetshenziselwa ukunxephezela.

3. Ukuwela

Ebhodini lokuchibiyela, eyodwa ekhethiwe ingahlolwa. Singasebenzisa lo msebenzi ukuze sibone ukuhlolwa kwebhodi lesichibi lapho ibanga phakathi kwephedi nonqenqema lwebhodi lincane kakhulu ukuthi lingahlolwa. Indlela yokuvimba amaphedi angakwazi ukubanjwa ithreyi. Ukuhlolwa okukodwa kuyanqanyulwa, futhi ngemva kokuhlolwa, ithreyi ibekwe epuletini elilungisiwe lomuntu oyedwa ohloliwe, futhi ibhodi elingazange lihlolwe okokugcina likhethiwe, ukuze ibhodi lonke lihlolwe ngokuhlolwa oku-2. Ngakho-ke, kufanele sisebenzise ngokuguquguqukayo imisebenzi ehlinzekwa yimishini ukuze sifeze izidingo ezithile ezikhethekile.

Okwesine, i-warpage

Ubukhulu ohlangothini olulodwa bukhulu kakhulu, ikakhulukazi uma ubukhulu obukolunye uhlangothi buncane, ibhodi lizojika ngokwemvelo (okubangelwa amandla adonsela phansi) lapho libekwe emshinini wokuhlola, futhi umshini wethu wokuhlola endizayo unesakhiwo esincane Inkinga encane, ubukhulu esiqondisweni se-X bukhulu, kodwa i-pallet eyodwa kuphela ibekwe, futhi ohlangothini lwe-Y ngosayizi omncane, ama-pallets amathathu angabekwa. Ngakho-ke, umshini ukhetha isiqondiso eside sebhodi okufanele silinganiswe Uma usethelwe ekuqondisweni kwe-X yomshini, kungcono ukuwuhlela ngesandla, ujikeleze ibhodi lama-degree angu-90, futhi ubeke isiqondiso salo eside ku-Y isiqondiso, okungaxazulula inkinga ye-warpage yebhodi ekuhlolweni ngezinga elithile. (Lokhu kulungiswa kufanele kusingathwe ku-DPS).