Imodzi, kuyesa kwamagetsi

PCB in the process of production, hard to avoid the short circuit, open circuit and leakage caused by external factors, such as electrical flaws, coupled with the continuous toward high density PCB, fine spacing and the evolution of multi-level, and failure to timely to bad plate screening out, and let it flow into the process, is bound to cause waste more cost, so in addition to the improvement of the process control, Njira zoyeserera zoyeserera zitha kupatsanso opanga ma PCB mayankho ochepetsa mitengo yazinyalala ndikusintha zokolola.

Pakapangidwe kazinthu zamagetsi, mtengo wotayika chifukwa cha zolakwika umakhala ndi madigiri osiyanasiyana pagawo lililonse, ndipo kupezeka koyambirira, kumachepetsa mtengo wokonzanso. Lamulo la 10 “s limakonda kugwiritsidwa ntchito kuyerekezera kukonzanso Mtengo wa PCB ukapezeka wolakwika magawo osiyanasiyana a Ndondomekoyi. Mwachitsanzo, mukamaliza kupanga mbale yopanda kanthu, ngati bolodi lomwe lili mderalo litha kupezeka munthawi yeniyeni, nthawi zambiri limangofunika kukonza cholakwika, kapena kutayika kwa mbale yopanda kanthu; Komabe, ngati dera silikupezeka, bolodi limatumizidwa kumalo opita kumtunda kuti akamalize kuyikapo mbali, ndipo ng’anjo yamoto ndi kukonzanso kwa IR, koma dera limapezeka panthawiyi, wokhazikitsidwa pambuyo pake adzafunsa kampani yopanga yopanda kanthu kulipirira mtengo wamagawo, chindapusa chamakampani olemera, chindapusa chakuwunika, ndi zina zambiri. Ngati mwatsoka, bolodi lolakwika silikupezeka pamayeso amakampani opanga msonkhano, koma m’dongosolo lonse lazamalonda, monga makompyuta, mafoni, zida zamagalimoto, ndi zina zotero, ndiye kuyesa kupeza kutayika, khalani opanda bolodi kuzindikira kwakanthawi kwakanthawi, nthawi chikwi, kapena kupitilira apo. Chifukwa chake, kuyesa kwamagetsi opanga ma PCB kumangokhudza kupezeka koyambirira kwama board olakwika.

The downstream operator usually requires the PCB manufacturer to perform 100 percent electrical testing and therefore agrees with the PCB manufacturer on specifications for testing conditions and methods, so both parties will first clearly define the following:

1. Test data source and format

2, zoyeserera, monga magetsi, zamakono, kutchinjiriza ndi kulumikizana

3. Njira yopangira ndi kusankha zida

4. Chaputala choyesa

5, kukonza mafotokozedwe

Pali magawo atatu pakupanga kwa PCB komwe kuyenera kuyesedwa:

1. After etching the inner layer

2. Mukamaliza kuzungulira kunja

3, mankhwala omalizidwa

Gawo lirilonse nthawi zambiri limakhala ndi mayesero a 2 ~ 3 pa 100%, osonyeza mbale yoyipa pokonza katundu. Therefore, the test station is also the best data collection source to analyze the process problem points. According to the statistical results, you can obtain the percentage of open circuit, short circuit and other insulation problems, and then test after reengineering. After sorting out the data, use the quality control method to find out the root of the problem and solve it.

Njira ziwiri, zamagetsi zamagetsi ndi zida

Njira zamagetsi zamagetsi zikuphatikiza: Grid Yodzipereka, Grid Probe, e-beam, nsalu zoyendetsera, Kutha ndi kuyang’ana kwa ATG ndi zida zitatu zomwe zimagwiritsidwa ntchito kwambiri. They are special test machine, general test machine and flying needle test machine. Pofuna kumvetsetsa bwino magwiridwe antchito amtundu uliwonse, mawonekedwe azida zazikulu zitatuzi amafanizidwa pansipa.

1. Dedicated testing

Fixtures (such as the pins and dials used to test circuit boards) only work with one material number. Boards with different material numbers cannot be tested and recycled. Potengera malo oyeserera, gulu limodzi limatha kuyesedwa mkati mwa mfundo 10,240, ndipo mbali zonsezo mkati mwa mfundo 8,192. Potengera kuchuluka kwa mayeso, chifukwa chakukula kwa kafukufukuyu, ndioyenera kwambiri pamatabwa omwe ali pamwamba paphokoso.

2. Kuyesedwa kwa Grid Yonse

Mfundo yoyeserera yogwiritsira ntchito ndikuti masanjidwe a PCB adapangidwa molingana ndi Grid. Nthawi zambiri, chomwe chimatchedwa kutalika kwa mzere chimatanthauza mtunda wa Grid, womwe umafotokozedwa ndi Pitch (nthawi zina amathanso kufotokozedwa ndi kachulukidwe ka dzenje), ndipo kuyesa kugwiritsa ntchito kwakukulu kumadalira pamfundoyi. Malinga ndi bowo, gawo la G10 limagwiritsidwa ntchito ngati Chigoba. Pokhapo pobowo, kafukufukuyu amatha kudutsa mu Chigoba kuti ayese magetsi, kotero kuti makinawo ndiosavuta komanso achangu, ndipo kafukufuku amatha kugwiritsidwanso ntchito. Muyezo wa Grid wokhazikika thireyi yayikulu ya singano yokhala ndi mfundo zambiri zoyezera itha kugwiritsidwa ntchito kutulutsa thireyi ya singano yosunthika malinga ndi manambala osiyanasiyana. Malingana ngati thireyi yosunthika ingasinthidwe pakapangidwe kochulukirapo, itha kugwiritsidwa ntchito pakuyesa kwamitundu yosiyanasiyana. Kuphatikiza apo, kuti muwonetsetse kuti dongosolo la PCB lomalizidwa silimaletsedwa, ndikofunikira kuyesa mayeso a Open / Short pama board ndi singano ya malo olumikizirana pamakina oyesera amagetsi okhala ndi magetsi ambiri ( monga 250V) malo owerengera ambiri. Makina amtunduwu wa TesTIng amatchedwa “AutomaTIc TesTIng Equipment” (ATE).

Malo ogwiritsira ntchito kwambiri nthawi zambiri amakhala opitilira 10,000, ndipo kuchuluka kwake kumayesedwa pa gridi. Ngati imagwiritsidwa ntchito m’matumba okwera kwambiri, katayalitsidwe kali pafupi kwambiri, ndipo idasiyanitsidwa ndi kapangidwe ka gridi, chifukwa chake ndiyakuyesa kwa grid, ndipo mawonekedwe ake ayenera kupangidwa mwapadera. Kuchuluka kwa mayeso a generic kumatha kufikira QFP.

3. Mayeso a Flying Probe

Mfundo yoyesera singano yowuluka ndiyosavuta. Ma probes awiri okha ndi omwe amafunika kuti asunthire x, y ndi Z kuti ayese malekezero awiri amzere uliwonse, chifukwa chake palibe chifukwa chopangira zida zina zokwera mtengo. Komabe, chifukwa cha mayeso omaliza, liwiro loyesa ndilochedwa kwambiri, pafupifupi 10 ~ 40 point / SEC, chifukwa chake ndioyenera zitsanzo ndi kupanga voliyumu yaying’ono; Ponena za kuchuluka kwake, kuyesa kwa singano kouluka kumatha kugwiritsidwa ntchito kuma mbale osanjikiza kwambiri, monga MCM.